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/wp-includes/ -> general-template.php (source)

   1  <?php
   2  /**
   3   * General template tags that can go anywhere in a template.
   4   *
   5   * @package WordPress
   6   * @subpackage Template
   7   */
   8  
   9  /**
  10   * Load header template.
  11   *
  12   * Includes the header template for a theme or if a name is specified then a
  13   * specialised header will be included.
  14   *
  15   * For the parameter, if the file is called "header-special.php" then specify
  16   * "special".
  17   *
  18   * @since 1.5.0
  19   * @since 5.5.0 A return value was added.
  20   * @since 5.5.0 The `$args` parameter was added.
  21   *
  22   * @param string $name The name of the specialised header.
  23   * @param array  $args Optional. Additional arguments passed to the header template.
  24   *                     Default empty array.
  25   * @return void|false Void on success, false if the template does not exist.
  26   */
  27  function get_header( $name = null, $args = array() ) {
  28      /**
  29       * Fires before the header template file is loaded.
  30       *
  31       * @since 2.1.0
  32       * @since 2.8.0 The `$name` parameter was added.
  33       * @since 5.5.0 The `$args` parameter was added.
  34       *
  35       * @param string|null $name Name of the specific header file to use. Null for the default header.
  36       * @param array       $args Additional arguments passed to the header template.
  37       */
  38      do_action( 'get_header', $name, $args );
  39  
  40      $templates = array();
  41      $name      = (string) $name;
  42      if ( '' !== $name ) {
  43          $templates[] = "header-{$name}.php";
  44      }
  45  
  46      $templates[] = 'header.php';
  47  
  48      if ( ! locate_template( $templates, true, true, $args ) ) {
  49          return false;
  50      }
  51  }
  52  
  53  /**
  54   * Load footer template.
  55   *
  56   * Includes the footer template for a theme or if a name is specified then a
  57   * specialised footer will be included.
  58   *
  59   * For the parameter, if the file is called "footer-special.php" then specify
  60   * "special".
  61   *
  62   * @since 1.5.0
  63   * @since 5.5.0 A return value was added.
  64   * @since 5.5.0 The `$args` parameter was added.
  65   *
  66   * @param string $name The name of the specialised footer.
  67   * @param array  $args Optional. Additional arguments passed to the footer template.
  68   *                     Default empty array.
  69   * @return void|false Void on success, false if the template does not exist.
  70   */
  71  function get_footer( $name = null, $args = array() ) {
  72      /**
  73       * Fires before the footer template file is loaded.
  74       *
  75       * @since 2.1.0
  76       * @since 2.8.0 The `$name` parameter was added.
  77       * @since 5.5.0 The `$args` parameter was added.
  78       *
  79       * @param string|null $name Name of the specific footer file to use. Null for the default footer.
  80       * @param array       $args Additional arguments passed to the footer template.
  81       */
  82      do_action( 'get_footer', $name, $args );
  83  
  84      $templates = array();
  85      $name      = (string) $name;
  86      if ( '' !== $name ) {
  87          $templates[] = "footer-{$name}.php";
  88      }
  89  
  90      $templates[] = 'footer.php';
  91  
  92      if ( ! locate_template( $templates, true, true, $args ) ) {
  93          return false;
  94      }
  95  }
  96  
  97  /**
  98   * Load sidebar template.
  99   *
 100   * Includes the sidebar template for a theme or if a name is specified then a
 101   * specialised sidebar will be included.
 102   *
 103   * For the parameter, if the file is called "sidebar-special.php" then specify
 104   * "special".
 105   *
 106   * @since 1.5.0
 107   * @since 5.5.0 A return value was added.
 108   * @since 5.5.0 The `$args` parameter was added.
 109   *
 110   * @param string $name The name of the specialised sidebar.
 111   * @param array  $args Optional. Additional arguments passed to the sidebar template.
 112   *                     Default empty array.
 113   * @return void|false Void on success, false if the template does not exist.
 114   */
 115  function get_sidebar( $name = null, $args = array() ) {
 116      /**
 117       * Fires before the sidebar template file is loaded.
 118       *
 119       * @since 2.2.0
 120       * @since 2.8.0 The `$name` parameter was added.
 121       * @since 5.5.0 The `$args` parameter was added.
 122       *
 123       * @param string|null $name Name of the specific sidebar file to use. Null for the default sidebar.
 124       * @param array       $args Additional arguments passed to the sidebar template.
 125       */
 126      do_action( 'get_sidebar', $name, $args );
 127  
 128      $templates = array();
 129      $name      = (string) $name;
 130      if ( '' !== $name ) {
 131          $templates[] = "sidebar-{$name}.php";
 132      }
 133  
 134      $templates[] = 'sidebar.php';
 135  
 136      if ( ! locate_template( $templates, true, true, $args ) ) {
 137          return false;
 138      }
 139  }
 140  
 141  /**
 142   * Loads a template part into a template.
 143   *
 144   * Provides a simple mechanism for child themes to overload reusable sections of code
 145   * in the theme.
 146   *
 147   * Includes the named template part for a theme or if a name is specified then a
 148   * specialised part will be included. If the theme contains no {slug}.php file
 149   * then no template will be included.
 150   *
 151   * The template is included using require, not require_once, so you may include the
 152   * same template part multiple times.
 153   *
 154   * For the $name parameter, if the file is called "{slug}-special.php" then specify
 155   * "special".
 156   *
 157   * @since 3.0.0
 158   * @since 5.5.0 A return value was added.
 159   * @since 5.5.0 The `$args` parameter was added.
 160   *
 161   * @param string $slug The slug name for the generic template.
 162   * @param string $name The name of the specialised template.
 163   * @param array  $args Optional. Additional arguments passed to the template.
 164   *                     Default empty array.
 165   * @return void|false Void on success, false if the template does not exist.
 166   */
 167  function get_template_part( $slug, $name = null, $args = array() ) {
 168      /**
 169       * Fires before the specified template part file is loaded.
 170       *
 171       * The dynamic portion of the hook name, `$slug`, refers to the slug name
 172       * for the generic template part.
 173       *
 174       * @since 3.0.0
 175       * @since 5.5.0 The `$args` parameter was added.
 176       *
 177       * @param string      $slug The slug name for the generic template.
 178       * @param string|null $name The name of the specialized template.
 179       * @param array       $args Additional arguments passed to the template.
 180       */
 181      do_action( "get_template_part_{$slug}", $slug, $name, $args );
 182  
 183      $templates = array();
 184      $name      = (string) $name;
 185      if ( '' !== $name ) {
 186          $templates[] = "{$slug}-{$name}.php";
 187      }
 188  
 189      $templates[] = "{$slug}.php";
 190  
 191      /**
 192       * Fires before a template part is loaded.
 193       *
 194       * @since 5.2.0
 195       * @since 5.5.0 The `$args` parameter was added.
 196       *
 197       * @param string   $slug      The slug name for the generic template.
 198       * @param string   $name      The name of the specialized template.
 199       * @param string[] $templates Array of template files to search for, in order.
 200       * @param array    $args      Additional arguments passed to the template.
 201       */
 202      do_action( 'get_template_part', $slug, $name, $templates, $args );
 203  
 204      if ( ! locate_template( $templates, true, false, $args ) ) {
 205          return false;
 206      }
 207  }
 208  
 209  /**
 210   * Display search form.
 211   *
 212   * Will first attempt to locate the searchform.php file in either the child or
 213   * the parent, then load it. If it doesn't exist, then the default search form
 214   * will be displayed. The default search form is HTML, which will be displayed.
 215   * There is a filter applied to the search form HTML in order to edit or replace
 216   * it. The filter is {@see 'get_search_form'}.
 217   *
 218   * This function is primarily used by themes which want to hardcode the search
 219   * form into the sidebar and also by the search widget in WordPress.
 220   *
 221   * There is also an action that is called whenever the function is run called,
 222   * {@see 'pre_get_search_form'}. This can be useful for outputting JavaScript that the
 223   * search relies on or various formatting that applies to the beginning of the
 224   * search. To give a few examples of what it can be used for.
 225   *
 226   * @since 2.7.0
 227   * @since 5.2.0 The `$args` array parameter was added in place of an `$echo` boolean flag.
 228   *
 229   * @param array $args {
 230   *     Optional. Array of display arguments.
 231   *
 232   *     @type bool   $echo       Whether to echo or return the form. Default true.
 233   *     @type string $aria_label ARIA label for the search form. Useful to distinguish
 234   *                              multiple search forms on the same page and improve
 235   *                              accessibility. Default empty.
 236   * }
 237   * @return void|string Void if 'echo' argument is true, search form HTML if 'echo' is false.
 238   */
 239  function get_search_form( $args = array() ) {
 240      /**
 241       * Fires before the search form is retrieved, at the start of get_search_form().
 242       *
 243       * @since 2.7.0 as 'get_search_form' action.
 244       * @since 3.6.0
 245       * @since 5.5.0 The `$args` parameter was added.
 246       *
 247       * @link https://core.trac.wordpress.org/ticket/19321
 248       *
 249       * @param array $args The array of arguments for building the search form.
 250       *                    See get_search_form() for information on accepted arguments.
 251       */
 252      do_action( 'pre_get_search_form', $args );
 253  
 254      $echo = true;
 255  
 256      if ( ! is_array( $args ) ) {
 257          /*
 258           * Back compat: to ensure previous uses of get_search_form() continue to
 259           * function as expected, we handle a value for the boolean $echo param removed
 260           * in 5.2.0. Then we deal with the $args array and cast its defaults.
 261           */
 262          $echo = (bool) $args;
 263  
 264          // Set an empty array and allow default arguments to take over.
 265          $args = array();
 266      }
 267  
 268      // Defaults are to echo and to output no custom label on the form.
 269      $defaults = array(
 270          'echo'       => $echo,
 271          'aria_label' => '',
 272      );
 273  
 274      $args = wp_parse_args( $args, $defaults );
 275  
 276      /**
 277       * Filters the array of arguments used when generating the search form.
 278       *
 279       * @since 5.2.0
 280       *
 281       * @param array $args The array of arguments for building the search form.
 282       *                    See get_search_form() for information on accepted arguments.
 283       */
 284      $args = apply_filters( 'search_form_args', $args );
 285  
 286      // Ensure that the filtered arguments contain all required default values.
 287      $args = array_merge( $defaults, $args );
 288  
 289      $format = current_theme_supports( 'html5', 'search-form' ) ? 'html5' : 'xhtml';
 290  
 291      /**
 292       * Filters the HTML format of the search form.
 293       *
 294       * @since 3.6.0
 295       * @since 5.5.0 The `$args` parameter was added.
 296       *
 297       * @param string $format The type of markup to use in the search form.
 298       *                       Accepts 'html5', 'xhtml'.
 299       * @param array  $args   The array of arguments for building the search form.
 300       *                       See get_search_form() for information on accepted arguments.
 301       */
 302      $format = apply_filters( 'search_form_format', $format, $args );
 303  
 304      $search_form_template = locate_template( 'searchform.php' );
 305  
 306      if ( '' !== $search_form_template ) {
 307          ob_start();
 308          require $search_form_template;
 309          $form = ob_get_clean();
 310      } else {
 311          // Build a string containing an aria-label to use for the search form.
 312          if ( $args['aria_label'] ) {
 313              $aria_label = 'aria-label="' . esc_attr( $args['aria_label'] ) . '" ';
 314          } else {
 315              /*
 316               * If there's no custom aria-label, we can set a default here. At the
 317               * moment it's empty as there's uncertainty about what the default should be.
 318               */
 319              $aria_label = '';
 320          }
 321  
 322          if ( 'html5' === $format ) {
 323              $form = '<form role="search" ' . $aria_label . 'method="get" class="search-form" action="' . esc_url( home_url( '/' ) ) . '">
 324                  <label>
 325                      <span class="screen-reader-text">' . _x( 'Search for:', 'label' ) . '</span>
 326                      <input type="search" class="search-field" placeholder="' . esc_attr_x( 'Search &hellip;', 'placeholder' ) . '" value="' . get_search_query() . '" name="s" />
 327                  </label>
 328                  <input type="submit" class="search-submit" value="' . esc_attr_x( 'Search', 'submit button' ) . '" />
 329              </form>';
 330          } else {
 331              $form = '<form role="search" ' . $aria_label . 'method="get" id="searchform" class="searchform" action="' . esc_url( home_url( '/' ) ) . '">
 332                  <div>
 333                      <label class="screen-reader-text" for="s">' . _x( 'Search for:', 'label' ) . '</label>
 334                      <input type="text" value="' . get_search_query() . '" name="s" id="s" />
 335                      <input type="submit" id="searchsubmit" value="' . esc_attr_x( 'Search', 'submit button' ) . '" />
 336                  </div>
 337              </form>';
 338          }
 339      }
 340  
 341      /**
 342       * Filters the HTML output of the search form.
 343       *
 344       * @since 2.7.0
 345       * @since 5.5.0 The `$args` parameter was added.
 346       *
 347       * @param string $form The search form HTML output.
 348       * @param array  $args The array of arguments for building the search form.
 349       *                     See get_search_form() for information on accepted arguments.
 350       */
 351      $result = apply_filters( 'get_search_form', $form, $args );
 352  
 353      if ( null === $result ) {
 354          $result = $form;
 355      }
 356  
 357      if ( $args['echo'] ) {
 358          echo $result;
 359      } else {
 360          return $result;
 361      }
 362  }
 363  
 364  /**
 365   * Display the Log In/Out link.
 366   *
 367   * Displays a link, which allows users to navigate to the Log In page to log in
 368   * or log out depending on whether they are currently logged in.
 369   *
 370   * @since 1.5.0
 371   *
 372   * @param string $redirect Optional path to redirect to on login/logout.
 373   * @param bool   $echo     Default to echo and not return the link.
 374   * @return void|string Void if `$echo` argument is true, log in/out link if `$echo` is false.
 375   */
 376  function wp_loginout( $redirect = '', $echo = true ) {
 377      if ( ! is_user_logged_in() ) {
 378          $link = '<a href="' . esc_url( wp_login_url( $redirect ) ) . '">' . __( 'Log in' ) . '</a>';
 379      } else {
 380          $link = '<a href="' . esc_url( wp_logout_url( $redirect ) ) . '">' . __( 'Log out' ) . '</a>';
 381      }
 382  
 383      if ( $echo ) {
 384          /**
 385           * Filters the HTML output for the Log In/Log Out link.
 386           *
 387           * @since 1.5.0
 388           *
 389           * @param string $link The HTML link content.
 390           */
 391          echo apply_filters( 'loginout', $link );
 392      } else {
 393          /** This filter is documented in wp-includes/general-template.php */
 394          return apply_filters( 'loginout', $link );
 395      }
 396  }
 397  
 398  /**
 399   * Retrieves the logout URL.
 400   *
 401   * Returns the URL that allows the user to log out of the site.
 402   *
 403   * @since 2.7.0
 404   *
 405   * @param string $redirect Path to redirect to on logout.
 406   * @return string The logout URL. Note: HTML-encoded via esc_html() in wp_nonce_url().
 407   */
 408  function wp_logout_url( $redirect = '' ) {
 409      $args = array();
 410      if ( ! empty( $redirect ) ) {
 411          $args['redirect_to'] = urlencode( $redirect );
 412      }
 413  
 414      $logout_url = add_query_arg( $args, site_url( 'wp-login.php?action=logout', 'login' ) );
 415      $logout_url = wp_nonce_url( $logout_url, 'log-out' );
 416  
 417      /**
 418       * Filters the logout URL.
 419       *
 420       * @since 2.8.0
 421       *
 422       * @param string $logout_url The HTML-encoded logout URL.
 423       * @param string $redirect   Path to redirect to on logout.
 424       */
 425      return apply_filters( 'logout_url', $logout_url, $redirect );
 426  }
 427  
 428  /**
 429   * Retrieves the login URL.
 430   *
 431   * @since 2.7.0
 432   *
 433   * @param string $redirect     Path to redirect to on log in.
 434   * @param bool   $force_reauth Whether to force reauthorization, even if a cookie is present.
 435   *                             Default false.
 436   * @return string The login URL. Not HTML-encoded.
 437   */
 438  function wp_login_url( $redirect = '', $force_reauth = false ) {
 439      $login_url = site_url( 'wp-login.php', 'login' );
 440  
 441      if ( ! empty( $redirect ) ) {
 442          $login_url = add_query_arg( 'redirect_to', urlencode( $redirect ), $login_url );
 443      }
 444  
 445      if ( $force_reauth ) {
 446          $login_url = add_query_arg( 'reauth', '1', $login_url );
 447      }
 448  
 449      /**
 450       * Filters the login URL.
 451       *
 452       * @since 2.8.0
 453       * @since 4.2.0 The `$force_reauth` parameter was added.
 454       *
 455       * @param string $login_url    The login URL. Not HTML-encoded.
 456       * @param string $redirect     The path to redirect to on login, if supplied.
 457       * @param bool   $force_reauth Whether to force reauthorization, even if a cookie is present.
 458       */
 459      return apply_filters( 'login_url', $login_url, $redirect, $force_reauth );
 460  }
 461  
 462  /**
 463   * Returns the URL that allows the user to register on the site.
 464   *
 465   * @since 3.6.0
 466   *
 467   * @return string User registration URL.
 468   */
 469  function wp_registration_url() {
 470      /**
 471       * Filters the user registration URL.
 472       *
 473       * @since 3.6.0
 474       *
 475       * @param string $register The user registration URL.
 476       */
 477      return apply_filters( 'register_url', site_url( 'wp-login.php?action=register', 'login' ) );
 478  }
 479  
 480  /**
 481   * Provides a simple login form for use anywhere within WordPress.
 482   *
 483   * The login form HTML is echoed by default. Pass a false value for `$echo` to return it instead.
 484   *
 485   * @since 3.0.0
 486   *
 487   * @param array $args {
 488   *     Optional. Array of options to control the form output. Default empty array.
 489   *
 490   *     @type bool   $echo           Whether to display the login form or return the form HTML code.
 491   *                                  Default true (echo).
 492   *     @type string $redirect       URL to redirect to. Must be absolute, as in "https://example.com/mypage/".
 493   *                                  Default is to redirect back to the request URI.
 494   *     @type string $form_id        ID attribute value for the form. Default 'loginform'.
 495   *     @type string $label_username Label for the username or email address field. Default 'Username or Email Address'.
 496   *     @type string $label_password Label for the password field. Default 'Password'.
 497   *     @type string $label_remember Label for the remember field. Default 'Remember Me'.
 498   *     @type string $label_log_in   Label for the submit button. Default 'Log In'.
 499   *     @type string $id_username    ID attribute value for the username field. Default 'user_login'.
 500   *     @type string $id_password    ID attribute value for the password field. Default 'user_pass'.
 501   *     @type string $id_remember    ID attribute value for the remember field. Default 'rememberme'.
 502   *     @type string $id_submit      ID attribute value for the submit button. Default 'wp-submit'.
 503   *     @type bool   $remember       Whether to display the "rememberme" checkbox in the form.
 504   *     @type string $value_username Default value for the username field. Default empty.
 505   *     @type bool   $value_remember Whether the "Remember Me" checkbox should be checked by default.
 506   *                                  Default false (unchecked).
 507   *
 508   * }
 509   * @return void|string Void if 'echo' argument is true, login form HTML if 'echo' is false.
 510   */
 511  function wp_login_form( $args = array() ) {
 512      $defaults = array(
 513          'echo'           => true,
 514          // Default 'redirect' value takes the user back to the request URI.
 515          'redirect'       => ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'],
 516          'form_id'        => 'loginform',
 517          'label_username' => __( 'Username or Email Address' ),
 518          'label_password' => __( 'Password' ),
 519          'label_remember' => __( 'Remember Me' ),
 520          'label_log_in'   => __( 'Log In' ),
 521          'id_username'    => 'user_login',
 522          'id_password'    => 'user_pass',
 523          'id_remember'    => 'rememberme',
 524          'id_submit'      => 'wp-submit',
 525          'remember'       => true,
 526          'value_username' => '',
 527          // Set 'value_remember' to true to default the "Remember me" checkbox to checked.
 528          'value_remember' => false,
 529      );
 530  
 531      /**
 532       * Filters the default login form output arguments.
 533       *
 534       * @since 3.0.0
 535       *
 536       * @see wp_login_form()
 537       *
 538       * @param array $defaults An array of default login form arguments.
 539       */
 540      $args = wp_parse_args( $args, apply_filters( 'login_form_defaults', $defaults ) );
 541  
 542      /**
 543       * Filters content to display at the top of the login form.
 544       *
 545       * The filter evaluates just following the opening form tag element.
 546       *
 547       * @since 3.0.0
 548       *
 549       * @param string $content Content to display. Default empty.
 550       * @param array  $args    Array of login form arguments.
 551       */
 552      $login_form_top = apply_filters( 'login_form_top', '', $args );
 553  
 554      /**
 555       * Filters content to display in the middle of the login form.
 556       *
 557       * The filter evaluates just following the location where the 'login-password'
 558       * field is displayed.
 559       *
 560       * @since 3.0.0
 561       *
 562       * @param string $content Content to display. Default empty.
 563       * @param array  $args    Array of login form arguments.
 564       */
 565      $login_form_middle = apply_filters( 'login_form_middle', '', $args );
 566  
 567      /**
 568       * Filters content to display at the bottom of the login form.
 569       *
 570       * The filter evaluates just preceding the closing form tag element.
 571       *
 572       * @since 3.0.0
 573       *
 574       * @param string $content Content to display. Default empty.
 575       * @param array  $args    Array of login form arguments.
 576       */
 577      $login_form_bottom = apply_filters( 'login_form_bottom', '', $args );
 578  
 579      $form = '
 580          <form name="' . $args['form_id'] . '" id="' . $args['form_id'] . '" action="' . esc_url( site_url( 'wp-login.php', 'login_post' ) ) . '" method="post">
 581              ' . $login_form_top . '
 582              <p class="login-username">
 583                  <label for="' . esc_attr( $args['id_username'] ) . '">' . esc_html( $args['label_username'] ) . '</label>
 584                  <input type="text" name="log" id="' . esc_attr( $args['id_username'] ) . '" class="input" value="' . esc_attr( $args['value_username'] ) . '" size="20" />
 585              </p>
 586              <p class="login-password">
 587                  <label for="' . esc_attr( $args['id_password'] ) . '">' . esc_html( $args['label_password'] ) . '</label>
 588                  <input type="password" name="pwd" id="' . esc_attr( $args['id_password'] ) . '" class="input" value="" size="20" />
 589              </p>
 590              ' . $login_form_middle . '
 591              ' . ( $args['remember'] ? '<p class="login-remember"><label><input name="rememberme" type="checkbox" id="' . esc_attr( $args['id_remember'] ) . '" value="forever"' . ( $args['value_remember'] ? ' checked="checked"' : '' ) . ' /> ' . esc_html( $args['label_remember'] ) . '</label></p>' : '' ) . '
 592              <p class="login-submit">
 593                  <input type="submit" name="wp-submit" id="' . esc_attr( $args['id_submit'] ) . '" class="button button-primary" value="' . esc_attr( $args['label_log_in'] ) . '" />
 594                  <input type="hidden" name="redirect_to" value="' . esc_url( $args['redirect'] ) . '" />
 595              </p>
 596              ' . $login_form_bottom . '
 597          </form>';
 598  
 599      if ( $args['echo'] ) {
 600          echo $form;
 601      } else {
 602          return $form;
 603      }
 604  }
 605  
 606  /**
 607   * Returns the URL that allows the user to retrieve the lost password
 608   *
 609   * @since 2.8.0
 610   *
 611   * @param string $redirect Path to redirect to on login.
 612   * @return string Lost password URL.
 613   */
 614  function wp_lostpassword_url( $redirect = '' ) {
 615      $args = array(
 616          'action' => 'lostpassword',
 617      );
 618  
 619      if ( ! empty( $redirect ) ) {
 620          $args['redirect_to'] = urlencode( $redirect );
 621      }
 622  
 623      if ( is_multisite() ) {
 624          $blog_details  = get_blog_details();
 625          $wp_login_path = $blog_details->path . 'wp-login.php';
 626      } else {
 627          $wp_login_path = 'wp-login.php';
 628      }
 629  
 630      $lostpassword_url = add_query_arg( $args, network_site_url( $wp_login_path, 'login' ) );
 631  
 632      /**
 633       * Filters the Lost Password URL.
 634       *
 635       * @since 2.8.0
 636       *
 637       * @param string $lostpassword_url The lost password page URL.
 638       * @param string $redirect         The path to redirect to on login.
 639       */
 640      return apply_filters( 'lostpassword_url', $lostpassword_url, $redirect );
 641  }
 642  
 643  /**
 644   * Display the Registration or Admin link.
 645   *
 646   * Display a link which allows the user to navigate to the registration page if
 647   * not logged in and registration is enabled or to the dashboard if logged in.
 648   *
 649   * @since 1.5.0
 650   *
 651   * @param string $before Text to output before the link. Default `<li>`.
 652   * @param string $after  Text to output after the link. Default `</li>`.
 653   * @param bool   $echo   Default to echo and not return the link.
 654   * @return void|string Void if `$echo` argument is true, registration or admin link
 655   *                     if `$echo` is false.
 656   */
 657  function wp_register( $before = '<li>', $after = '</li>', $echo = true ) {
 658      if ( ! is_user_logged_in() ) {
 659          if ( get_option( 'users_can_register' ) ) {
 660              $link = $before . '<a href="' . esc_url( wp_registration_url() ) . '">' . __( 'Register' ) . '</a>' . $after;
 661          } else {
 662              $link = '';
 663          }
 664      } elseif ( current_user_can( 'read' ) ) {
 665          $link = $before . '<a href="' . admin_url() . '">' . __( 'Site Admin' ) . '</a>' . $after;
 666      } else {
 667          $link = '';
 668      }
 669  
 670      /**
 671       * Filters the HTML link to the Registration or Admin page.
 672       *
 673       * Users are sent to the admin page if logged-in, or the registration page
 674       * if enabled and logged-out.
 675       *
 676       * @since 1.5.0
 677       *
 678       * @param string $link The HTML code for the link to the Registration or Admin page.
 679       */
 680      $link = apply_filters( 'register', $link );
 681  
 682      if ( $echo ) {
 683          echo $link;
 684      } else {
 685          return $link;
 686      }
 687  }
 688  
 689  /**
 690   * Theme container function for the 'wp_meta' action.
 691   *
 692   * The {@see 'wp_meta'} action can have several purposes, depending on how you use it,
 693   * but one purpose might have been to allow for theme switching.
 694   *
 695   * @since 1.5.0
 696   *
 697   * @link https://core.trac.wordpress.org/ticket/1458 Explanation of 'wp_meta' action.
 698   */
 699  function wp_meta() {
 700      /**
 701       * Fires before displaying echoed content in the sidebar.
 702       *
 703       * @since 1.5.0
 704       */
 705      do_action( 'wp_meta' );
 706  }
 707  
 708  /**
 709   * Displays information about the current site.
 710   *
 711   * @since 0.71
 712   *
 713   * @see get_bloginfo() For possible `$show` values
 714   *
 715   * @param string $show Optional. Site information to display. Default empty.
 716   */
 717  function bloginfo( $show = '' ) {
 718      echo get_bloginfo( $show, 'display' );
 719  }
 720  
 721  /**
 722   * Retrieves information about the current site.
 723   *
 724   * Possible values for `$show` include:
 725   *
 726   * - 'name' - Site title (set in Settings > General)
 727   * - 'description' - Site tagline (set in Settings > General)
 728   * - 'wpurl' - The WordPress address (URL) (set in Settings > General)
 729   * - 'url' - The Site address (URL) (set in Settings > General)
 730   * - 'admin_email' - Admin email (set in Settings > General)
 731   * - 'charset' - The "Encoding for pages and feeds"  (set in Settings > Reading)
 732   * - 'version' - The current WordPress version
 733   * - 'html_type' - The content-type (default: "text/html"). Themes and plugins
 734   *   can override the default value using the {@see 'pre_option_html_type'} filter
 735   * - 'text_direction' - The text direction determined by the site's language. is_rtl()
 736   *   should be used instead
 737   * - 'language' - Language code for the current site
 738   * - 'stylesheet_url' - URL to the stylesheet for the active theme. An active child theme
 739   *   will take precedence over this value
 740   * - 'stylesheet_directory' - Directory path for the active theme.  An active child theme
 741   *   will take precedence over this value
 742   * - 'template_url' / 'template_directory' - URL of the active theme's directory. An active
 743   *   child theme will NOT take precedence over this value
 744   * - 'pingback_url' - The pingback XML-RPC file URL (xmlrpc.php)
 745   * - 'atom_url' - The Atom feed URL (/feed/atom)
 746   * - 'rdf_url' - The RDF/RSS 1.0 feed URL (/feed/rdf)
 747   * - 'rss_url' - The RSS 0.92 feed URL (/feed/rss)
 748   * - 'rss2_url' - The RSS 2.0 feed URL (/feed)
 749   * - 'comments_atom_url' - The comments Atom feed URL (/comments/feed)
 750   * - 'comments_rss2_url' - The comments RSS 2.0 feed URL (/comments/feed)
 751   *
 752   * Some `$show` values are deprecated and will be removed in future versions.
 753   * These options will trigger the _deprecated_argument() function.
 754   *
 755   * Deprecated arguments include:
 756   *
 757   * - 'siteurl' - Use 'url' instead
 758   * - 'home' - Use 'url' instead
 759   *
 760   * @since 0.71
 761   *
 762   * @global string $wp_version The WordPress version string.
 763   *
 764   * @param string $show   Optional. Site info to retrieve. Default empty (site name).
 765   * @param string $filter Optional. How to filter what is retrieved. Default 'raw'.
 766   * @return string Mostly string values, might be empty.
 767   */
 768  function get_bloginfo( $show = '', $filter = 'raw' ) {
 769      switch ( $show ) {
 770          case 'home':    // Deprecated.
 771          case 'siteurl': // Deprecated.
 772              _deprecated_argument(
 773                  __FUNCTION__,
 774                  '2.2.0',
 775                  sprintf(
 776                      /* translators: 1: 'siteurl'/'home' argument, 2: bloginfo() function name, 3: 'url' argument. */
 777                      __( 'The %1$s option is deprecated for the family of %2$s functions. Use the %3$s option instead.' ),
 778                      '<code>' . $show . '</code>',
 779                      '<code>bloginfo()</code>',
 780                      '<code>url</code>'
 781                  )
 782              );
 783              // Intentional fall-through to be handled by the 'url' case.
 784          case 'url':
 785              $output = home_url();
 786              break;
 787          case 'wpurl':
 788              $output = site_url();
 789              break;
 790          case 'description':
 791              $output = get_option( 'blogdescription' );
 792              break;
 793          case 'rdf_url':
 794              $output = get_feed_link( 'rdf' );
 795              break;
 796          case 'rss_url':
 797              $output = get_feed_link( 'rss' );
 798              break;
 799          case 'rss2_url':
 800              $output = get_feed_link( 'rss2' );
 801              break;
 802          case 'atom_url':
 803              $output = get_feed_link( 'atom' );
 804              break;
 805          case 'comments_atom_url':
 806              $output = get_feed_link( 'comments_atom' );
 807              break;
 808          case 'comments_rss2_url':
 809              $output = get_feed_link( 'comments_rss2' );
 810              break;
 811          case 'pingback_url':
 812              $output = site_url( 'xmlrpc.php' );
 813              break;
 814          case 'stylesheet_url':
 815              $output = get_stylesheet_uri();
 816              break;
 817          case 'stylesheet_directory':
 818              $output = get_stylesheet_directory_uri();
 819              break;
 820          case 'template_directory':
 821          case 'template_url':
 822              $output = get_template_directory_uri();
 823              break;
 824          case 'admin_email':
 825              $output = get_option( 'admin_email' );
 826              break;
 827          case 'charset':
 828              $output = get_option( 'blog_charset' );
 829              if ( '' === $output ) {
 830                  $output = 'UTF-8';
 831              }
 832              break;
 833          case 'html_type':
 834              $output = get_option( 'html_type' );
 835              break;
 836          case 'version':
 837              global $wp_version;
 838              $output = $wp_version;
 839              break;
 840          case 'language':
 841              /*
 842               * translators: Translate this to the correct language tag for your locale,
 843               * see https://www.w3.org/International/articles/language-tags/ for reference.
 844               * Do not translate into your own language.
 845               */
 846              $output = __( 'html_lang_attribute' );
 847              if ( 'html_lang_attribute' === $output || preg_match( '/[^a-zA-Z0-9-]/', $output ) ) {
 848                  $output = determine_locale();
 849                  $output = str_replace( '_', '-', $output );
 850              }
 851              break;
 852          case 'text_direction':
 853              _deprecated_argument(
 854                  __FUNCTION__,
 855                  '2.2.0',
 856                  sprintf(
 857                      /* translators: 1: 'text_direction' argument, 2: bloginfo() function name, 3: is_rtl() function name. */
 858                      __( 'The %1$s option is deprecated for the family of %2$s functions. Use the %3$s function instead.' ),
 859                      '<code>' . $show . '</code>',
 860                      '<code>bloginfo()</code>',
 861                      '<code>is_rtl()</code>'
 862                  )
 863              );
 864              if ( function_exists( 'is_rtl' ) ) {
 865                  $output = is_rtl() ? 'rtl' : 'ltr';
 866              } else {
 867                  $output = 'ltr';
 868              }
 869              break;
 870          case 'name':
 871          default:
 872              $output = get_option( 'blogname' );
 873              break;
 874      }
 875  
 876      $url = true;
 877      if ( strpos( $show, 'url' ) === false &&
 878          strpos( $show, 'directory' ) === false &&
 879          strpos( $show, 'home' ) === false ) {
 880          $url = false;
 881      }
 882  
 883      if ( 'display' === $filter ) {
 884          if ( $url ) {
 885              /**
 886               * Filters the URL returned by get_bloginfo().
 887               *
 888               * @since 2.0.5
 889               *
 890               * @param string $output The URL returned by bloginfo().
 891               * @param string $show   Type of information requested.
 892               */
 893              $output = apply_filters( 'bloginfo_url', $output, $show );
 894          } else {
 895              /**
 896               * Filters the site information returned by get_bloginfo().
 897               *
 898               * @since 0.71
 899               *
 900               * @param mixed  $output The requested non-URL site information.
 901               * @param string $show   Type of information requested.
 902               */
 903              $output = apply_filters( 'bloginfo', $output, $show );
 904          }
 905      }
 906  
 907      return $output;
 908  }
 909  
 910  /**
 911   * Returns the Site Icon URL.
 912   *
 913   * @since 4.3.0
 914   *
 915   * @param int    $size    Optional. Size of the site icon. Default 512 (pixels).
 916   * @param string $url     Optional. Fallback url if no site icon is found. Default empty.
 917   * @param int    $blog_id Optional. ID of the blog to get the site icon for. Default current blog.
 918   * @return string Site Icon URL.
 919   */
 920  function get_site_icon_url( $size = 512, $url = '', $blog_id = 0 ) {
 921      $switched_blog = false;
 922  
 923      if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
 924          switch_to_blog( $blog_id );
 925          $switched_blog = true;
 926      }
 927  
 928      $site_icon_id = get_option( 'site_icon' );
 929  
 930      if ( $site_icon_id ) {
 931          if ( $size >= 512 ) {
 932              $size_data = 'full';
 933          } else {
 934              $size_data = array( $size, $size );
 935          }
 936          $url = wp_get_attachment_image_url( $site_icon_id, $size_data );
 937      }
 938  
 939      if ( $switched_blog ) {
 940          restore_current_blog();
 941      }
 942  
 943      /**
 944       * Filters the site icon URL.
 945       *
 946       * @since 4.4.0
 947       *
 948       * @param string $url     Site icon URL.
 949       * @param int    $size    Size of the site icon.
 950       * @param int    $blog_id ID of the blog to get the site icon for.
 951       */
 952      return apply_filters( 'get_site_icon_url', $url, $size, $blog_id );
 953  }
 954  
 955  /**
 956   * Displays the Site Icon URL.
 957   *
 958   * @since 4.3.0
 959   *
 960   * @param int    $size    Optional. Size of the site icon. Default 512 (pixels).
 961   * @param string $url     Optional. Fallback url if no site icon is found. Default empty.
 962   * @param int    $blog_id Optional. ID of the blog to get the site icon for. Default current blog.
 963   */
 964  function site_icon_url( $size = 512, $url = '', $blog_id = 0 ) {
 965      echo esc_url( get_site_icon_url( $size, $url, $blog_id ) );
 966  }
 967  
 968  /**
 969   * Whether the site has a Site Icon.
 970   *
 971   * @since 4.3.0
 972   *
 973   * @param int $blog_id Optional. ID of the blog in question. Default current blog.
 974   * @return bool Whether the site has a site icon or not.
 975   */
 976  function has_site_icon( $blog_id = 0 ) {
 977      return (bool) get_site_icon_url( 512, '', $blog_id );
 978  }
 979  
 980  /**
 981   * Determines whether the site has a custom logo.
 982   *
 983   * @since 4.5.0
 984   *
 985   * @param int $blog_id Optional. ID of the blog in question. Default is the ID of the current blog.
 986   * @return bool Whether the site has a custom logo or not.
 987   */
 988  function has_custom_logo( $blog_id = 0 ) {
 989      $switched_blog = false;
 990  
 991      if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
 992          switch_to_blog( $blog_id );
 993          $switched_blog = true;
 994      }
 995  
 996      $custom_logo_id = get_theme_mod( 'custom_logo' );
 997  
 998      if ( $switched_blog ) {
 999          restore_current_blog();
1000      }
1001  
1002      return (bool) $custom_logo_id;
1003  }
1004  
1005  /**
1006   * Returns a custom logo, linked to home unless the theme supports removing the link on the home page.
1007   *
1008   * @since 4.5.0
1009   * @since 5.5.0 Added option to remove the link on the home page with `unlink-homepage-logo` theme support
1010   *              for the `custom-logo` theme feature.
1011   * @since 5.5.1 Disabled lazy-loading by default.
1012   *
1013   * @param int $blog_id Optional. ID of the blog in question. Default is the ID of the current blog.
1014   * @return string Custom logo markup.
1015   */
1016  function get_custom_logo( $blog_id = 0 ) {
1017      $html          = '';
1018      $switched_blog = false;
1019  
1020      if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
1021          switch_to_blog( $blog_id );
1022          $switched_blog = true;
1023      }
1024  
1025      $custom_logo_id = get_theme_mod( 'custom_logo' );
1026  
1027      // We have a logo. Logo is go.
1028      if ( $custom_logo_id ) {
1029          $custom_logo_attr = array(
1030              'class'   => 'custom-logo',
1031              'loading' => false,
1032          );
1033  
1034          $unlink_homepage_logo = (bool) get_theme_support( 'custom-logo', 'unlink-homepage-logo' );
1035  
1036          if ( $unlink_homepage_logo && is_front_page() && ! is_paged() ) {
1037              /*
1038               * If on the home page, set the logo alt attribute to an empty string,
1039               * as the image is decorative and doesn't need its purpose to be described.
1040               */
1041              $custom_logo_attr['alt'] = '';
1042          } else {
1043              /*
1044               * If the logo alt attribute is empty, get the site title and explicitly pass it
1045               * to the attributes used by wp_get_attachment_image().
1046               */
1047              $image_alt = get_post_meta( $custom_logo_id, '_wp_attachment_image_alt', true );
1048              if ( empty( $image_alt ) ) {
1049                  $custom_logo_attr['alt'] = get_bloginfo( 'name', 'display' );
1050              }
1051          }
1052  
1053          /**
1054           * Filters the list of custom logo image attributes.
1055           *
1056           * @since 5.5.0
1057           *
1058           * @param array $custom_logo_attr Custom logo image attributes.
1059           * @param int   $custom_logo_id   Custom logo attachment ID.
1060           * @param int   $blog_id          ID of the blog to get the custom logo for.
1061           */
1062          $custom_logo_attr = apply_filters( 'get_custom_logo_image_attributes', $custom_logo_attr, $custom_logo_id, $blog_id );
1063  
1064          /*
1065           * If the alt attribute is not empty, there's no need to explicitly pass it
1066           * because wp_get_attachment_image() already adds the alt attribute.
1067           */
1068          $image = wp_get_attachment_image( $custom_logo_id, 'full', false, $custom_logo_attr );
1069  
1070          if ( $unlink_homepage_logo && is_front_page() && ! is_paged() ) {
1071              // If on the home page, don't link the logo to home.
1072              $html = sprintf(
1073                  '<span class="custom-logo-link">%1$s</span>',
1074                  $image
1075              );
1076          } else {
1077              $aria_current = is_front_page() && ! is_paged() ? ' aria-current="page"' : '';
1078  
1079              $html = sprintf(
1080                  '<a href="%1$s" class="custom-logo-link" rel="home"%2$s>%3$s</a>',
1081                  esc_url( home_url( '/' ) ),
1082                  $aria_current,
1083                  $image
1084              );
1085          }
1086      } elseif ( is_customize_preview() ) {
1087          // If no logo is set but we're in the Customizer, leave a placeholder (needed for the live preview).
1088          $html = sprintf(
1089              '<a href="%1$s" class="custom-logo-link" style="display:none;"><img class="custom-logo" alt="" /></a>',
1090              esc_url( home_url( '/' ) )
1091          );
1092      }
1093  
1094      if ( $switched_blog ) {
1095          restore_current_blog();
1096      }
1097  
1098      /**
1099       * Filters the custom logo output.
1100       *
1101       * @since 4.5.0
1102       * @since 4.6.0 Added the `$blog_id` parameter.
1103       *
1104       * @param string $html    Custom logo HTML output.
1105       * @param int    $blog_id ID of the blog to get the custom logo for.
1106       */
1107      return apply_filters( 'get_custom_logo', $html, $blog_id );
1108  }
1109  
1110  /**
1111   * Displays a custom logo, linked to home unless the theme supports removing the link on the home page.
1112   *
1113   * @since 4.5.0
1114   *
1115   * @param int $blog_id Optional. ID of the blog in question. Default is the ID of the current blog.
1116   */
1117  function the_custom_logo( $blog_id = 0 ) {
1118      echo get_custom_logo( $blog_id );
1119  }
1120  
1121  /**
1122   * Returns document title for the current page.
1123   *
1124   * @since 4.4.0
1125   *
1126   * @global int $page  Page number of a single post.
1127   * @global int $paged Page number of a list of posts.
1128   *
1129   * @return string Tag with the document title.
1130   */
1131  function wp_get_document_title() {
1132  
1133      /**
1134       * Filters the document title before it is generated.
1135       *
1136       * Passing a non-empty value will short-circuit wp_get_document_title(),
1137       * returning that value instead.
1138       *
1139       * @since 4.4.0
1140       *
1141       * @param string $title The document title. Default empty string.
1142       */
1143      $title = apply_filters( 'pre_get_document_title', '' );
1144      if ( ! empty( $title ) ) {
1145          return $title;
1146      }
1147  
1148      global $page, $paged;
1149  
1150      $title = array(
1151          'title' => '',
1152      );
1153  
1154      // If it's a 404 page, use a "Page not found" title.
1155      if ( is_404() ) {
1156          $title['title'] = __( 'Page not found' );
1157  
1158          // If it's a search, use a dynamic search results title.
1159      } elseif ( is_search() ) {
1160          /* translators: %s: Search query. */
1161          $title['title'] = sprintf( __( 'Search Results for &#8220;%s&#8221;' ), get_search_query() );
1162  
1163          // If on the front page, use the site title.
1164      } elseif ( is_front_page() ) {
1165          $title['title'] = get_bloginfo( 'name', 'display' );
1166  
1167          // If on a post type archive, use the post type archive title.
1168      } elseif ( is_post_type_archive() ) {
1169          $title['title'] = post_type_archive_title( '', false );
1170  
1171          // If on a taxonomy archive, use the term title.
1172      } elseif ( is_tax() ) {
1173          $title['title'] = single_term_title( '', false );
1174  
1175          /*
1176          * If we're on the blog page that is not the homepage
1177          * or a single post of any post type, use the post title.
1178          */
1179      } elseif ( is_home() || is_singular() ) {
1180          $title['title'] = single_post_title( '', false );
1181  
1182          // If on a category or tag archive, use the term title.
1183      } elseif ( is_category() || is_tag() ) {
1184          $title['title'] = single_term_title( '', false );
1185  
1186          // If on an author archive, use the author's display name.
1187      } elseif ( is_author() && get_queried_object() ) {
1188          $author         = get_queried_object();
1189          $title['title'] = $author->display_name;
1190  
1191          // If it's a date archive, use the date as the title.
1192      } elseif ( is_year() ) {
1193          $title['title'] = get_the_date( _x( 'Y', 'yearly archives date format' ) );
1194  
1195      } elseif ( is_month() ) {
1196          $title['title'] = get_the_date( _x( 'F Y', 'monthly archives date format' ) );
1197  
1198      } elseif ( is_day() ) {
1199          $title['title'] = get_the_date();
1200      }
1201  
1202      // Add a page number if necessary.
1203      if ( ( $paged >= 2 || $page >= 2 ) && ! is_404() ) {
1204          /* translators: %s: Page number. */
1205          $title['page'] = sprintf( __( 'Page %s' ), max( $paged, $page ) );
1206      }
1207  
1208      // Append the description or site title to give context.
1209      if ( is_front_page() ) {
1210          $title['tagline'] = get_bloginfo( 'description', 'display' );
1211      } else {
1212          $title['site'] = get_bloginfo( 'name', 'display' );
1213      }
1214  
1215      /**
1216       * Filters the separator for the document title.
1217       *
1218       * @since 4.4.0
1219       *
1220       * @param string $sep Document title separator. Default '-'.
1221       */
1222      $sep = apply_filters( 'document_title_separator', '-' );
1223  
1224      /**
1225       * Filters the parts of the document title.
1226       *
1227       * @since 4.4.0
1228       *
1229       * @param array $title {
1230       *     The document title parts.
1231       *
1232       *     @type string $title   Title of the viewed page.
1233       *     @type string $page    Optional. Page number if paginated.
1234       *     @type string $tagline Optional. Site description when on home page.
1235       *     @type string $site    Optional. Site title when not on home page.
1236       * }
1237       */
1238      $title = apply_filters( 'document_title_parts', $title );
1239  
1240      $title = implode( " $sep ", array_filter( $title ) );
1241  
1242      /**
1243       * Filters the document title.
1244       *
1245       * @since 5.8.0
1246       *
1247       * @param string $title Document title.
1248       */
1249      $title = apply_filters( 'document_title', $title );
1250  
1251      return $title;
1252  }
1253  
1254  /**
1255   * Displays title tag with content.
1256   *
1257   * @ignore
1258   * @since 4.1.0
1259   * @since 4.4.0 Improved title output replaced `wp_title()`.
1260   * @access private
1261   */
1262  function _wp_render_title_tag() {
1263      if ( ! current_theme_supports( 'title-tag' ) ) {
1264          return;
1265      }
1266  
1267      echo '<title>' . wp_get_document_title() . '</title>' . "\n";
1268  }
1269  
1270  /**
1271   * Display or retrieve page title for all areas of blog.
1272   *
1273   * By default, the page title will display the separator before the page title,
1274   * so that the blog title will be before the page title. This is not good for
1275   * title display, since the blog title shows up on most tabs and not what is
1276   * important, which is the page that the user is looking at.
1277   *
1278   * There are also SEO benefits to having the blog title after or to the 'right'
1279   * of the page title. However, it is mostly common sense to have the blog title
1280   * to the right with most browsers supporting tabs. You can achieve this by
1281   * using the seplocation parameter and setting the value to 'right'. This change
1282   * was introduced around 2.5.0, in case backward compatibility of themes is
1283   * important.
1284   *
1285   * @since 1.0.0
1286   *
1287   * @global WP_Locale $wp_locale WordPress date and time locale object.
1288   *
1289   * @param string $sep         Optional. How to separate the various items within the page title.
1290   *                            Default '&raquo;'.
1291   * @param bool   $display     Optional. Whether to display or retrieve title. Default true.
1292   * @param string $seplocation Optional. Location of the separator ('left' or 'right').
1293   * @return string|void String when `$display` is true, nothing otherwise.
1294   */
1295  function wp_title( $sep = '&raquo;', $display = true, $seplocation = '' ) {
1296      global $wp_locale;
1297  
1298      $m        = get_query_var( 'm' );
1299      $year     = get_query_var( 'year' );
1300      $monthnum = get_query_var( 'monthnum' );
1301      $day      = get_query_var( 'day' );
1302      $search   = get_query_var( 's' );
1303      $title    = '';
1304  
1305      $t_sep = '%WP_TITLE_SEP%'; // Temporary separator, for accurate flipping, if necessary.
1306  
1307      // If there is a post.
1308      if ( is_single() || ( is_home() && ! is_front_page() ) || ( is_page() && ! is_front_page() ) ) {
1309          $title = single_post_title( '', false );
1310      }
1311  
1312      // If there's a post type archive.
1313      if ( is_post_type_archive() ) {
1314          $post_type = get_query_var( 'post_type' );
1315          if ( is_array( $post_type ) ) {
1316              $post_type = reset( $post_type );
1317          }
1318          $post_type_object = get_post_type_object( $post_type );
1319          if ( ! $post_type_object->has_archive ) {
1320              $title = post_type_archive_title( '', false );
1321          }
1322      }
1323  
1324      // If there's a category or tag.
1325      if ( is_category() || is_tag() ) {
1326          $title = single_term_title( '', false );
1327      }
1328  
1329      // If there's a taxonomy.
1330      if ( is_tax() ) {
1331          $term = get_queried_object();
1332          if ( $term ) {
1333              $tax   = get_taxonomy( $term->taxonomy );
1334              $title = single_term_title( $tax->labels->name . $t_sep, false );
1335          }
1336      }
1337  
1338      // If there's an author.
1339      if ( is_author() && ! is_post_type_archive() ) {
1340          $author = get_queried_object();
1341          if ( $author ) {
1342              $title = $author->display_name;
1343          }
1344      }
1345  
1346      // Post type archives with has_archive should override terms.
1347      if ( is_post_type_archive() && $post_type_object->has_archive ) {
1348          $title = post_type_archive_title( '', false );
1349      }
1350  
1351      // If there's a month.
1352      if ( is_archive() && ! empty( $m ) ) {
1353          $my_year  = substr( $m, 0, 4 );
1354          $my_month = $wp_locale->get_month( substr( $m, 4, 2 ) );
1355          $my_day   = (int) substr( $m, 6, 2 );
1356          $title    = $my_year . ( $my_month ? $t_sep . $my_month : '' ) . ( $my_day ? $t_sep . $my_day : '' );
1357      }
1358  
1359      // If there's a year.
1360      if ( is_archive() && ! empty( $year ) ) {
1361          $title = $year;
1362          if ( ! empty( $monthnum ) ) {
1363              $title .= $t_sep . $wp_locale->get_month( $monthnum );
1364          }
1365          if ( ! empty( $day ) ) {
1366              $title .= $t_sep . zeroise( $day, 2 );
1367          }
1368      }
1369  
1370      // If it's a search.
1371      if ( is_search() ) {
1372          /* translators: 1: Separator, 2: Search query. */
1373          $title = sprintf( __( 'Search Results %1$s %2$s' ), $t_sep, strip_tags( $search ) );
1374      }
1375  
1376      // If it's a 404 page.
1377      if ( is_404() ) {
1378          $title = __( 'Page not found' );
1379      }
1380  
1381      $prefix = '';
1382      if ( ! empty( $title ) ) {
1383          $prefix = " $sep ";
1384      }
1385  
1386      /**
1387       * Filters the parts of the page title.
1388       *
1389       * @since 4.0.0
1390       *
1391       * @param string[] $title_array Array of parts of the page title.
1392       */
1393      $title_array = apply_filters( 'wp_title_parts', explode( $t_sep, $title ) );
1394  
1395      // Determines position of the separator and direction of the breadcrumb.
1396      if ( 'right' === $seplocation ) { // Separator on right, so reverse the order.
1397          $title_array = array_reverse( $title_array );
1398          $title       = implode( " $sep ", $title_array ) . $prefix;
1399      } else {
1400          $title = $prefix . implode( " $sep ", $title_array );
1401      }
1402  
1403      /**
1404       * Filters the text of the page title.
1405       *
1406       * @since 2.0.0
1407       *
1408       * @param string $title       Page title.
1409       * @param string $sep         Title separator.
1410       * @param string $seplocation Location of the separator ('left' or 'right').
1411       */
1412      $title = apply_filters( 'wp_title', $title, $sep, $seplocation );
1413  
1414      // Send it out.
1415      if ( $display ) {
1416          echo $title;
1417      } else {
1418          return $title;
1419      }
1420  }
1421  
1422  /**
1423   * Display or retrieve page title for post.
1424   *
1425   * This is optimized for single.php template file for displaying the post title.
1426   *
1427   * It does not support placing the separator after the title, but by leaving the
1428   * prefix parameter empty, you can set the title separator manually. The prefix
1429   * does not automatically place a space between the prefix, so if there should
1430   * be a space, the parameter value will need to have it at the end.
1431   *
1432   * @since 0.71
1433   *
1434   * @param string $prefix  Optional. What to display before the title.
1435   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1436   * @return string|void Title when retrieving.
1437   */
1438  function single_post_title( $prefix = '', $display = true ) {
1439      $_post = get_queried_object();
1440  
1441      if ( ! isset( $_post->post_title ) ) {
1442          return;
1443      }
1444  
1445      /**
1446       * Filters the page title for a single post.
1447       *
1448       * @since 0.71
1449       *
1450       * @param string  $_post_title The single post page title.
1451       * @param WP_Post $_post       The current post.
1452       */
1453      $title = apply_filters( 'single_post_title', $_post->post_title, $_post );
1454      if ( $display ) {
1455          echo $prefix . $title;
1456      } else {
1457          return $prefix . $title;
1458      }
1459  }
1460  
1461  /**
1462   * Display or retrieve title for a post type archive.
1463   *
1464   * This is optimized for archive.php and archive-{$post_type}.php template files
1465   * for displaying the title of the post type.
1466   *
1467   * @since 3.1.0
1468   *
1469   * @param string $prefix  Optional. What to display before the title.
1470   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1471   * @return string|void Title when retrieving, null when displaying or failure.
1472   */
1473  function post_type_archive_title( $prefix = '', $display = true ) {
1474      if ( ! is_post_type_archive() ) {
1475          return;
1476      }
1477  
1478      $post_type = get_query_var( 'post_type' );
1479      if ( is_array( $post_type ) ) {
1480          $post_type = reset( $post_type );
1481      }
1482  
1483      $post_type_obj = get_post_type_object( $post_type );
1484  
1485      /**
1486       * Filters the post type archive title.
1487       *
1488       * @since 3.1.0
1489       *
1490       * @param string $post_type_name Post type 'name' label.
1491       * @param string $post_type      Post type.
1492       */
1493      $title = apply_filters( 'post_type_archive_title', $post_type_obj->labels->name, $post_type );
1494  
1495      if ( $display ) {
1496          echo $prefix . $title;
1497      } else {
1498          return $prefix . $title;
1499      }
1500  }
1501  
1502  /**
1503   * Display or retrieve page title for category archive.
1504   *
1505   * Useful for category template files for displaying the category page title.
1506   * The prefix does not automatically place a space between the prefix, so if
1507   * there should be a space, the parameter value will need to have it at the end.
1508   *
1509   * @since 0.71
1510   *
1511   * @param string $prefix  Optional. What to display before the title.
1512   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1513   * @return string|void Title when retrieving.
1514   */
1515  function single_cat_title( $prefix = '', $display = true ) {
1516      return single_term_title( $prefix, $display );
1517  }
1518  
1519  /**
1520   * Display or retrieve page title for tag post archive.
1521   *
1522   * Useful for tag template files for displaying the tag page title. The prefix
1523   * does not automatically place a space between the prefix, so if there should
1524   * be a space, the parameter value will need to have it at the end.
1525   *
1526   * @since 2.3.0
1527   *
1528   * @param string $prefix  Optional. What to display before the title.
1529   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1530   * @return string|void Title when retrieving.
1531   */
1532  function single_tag_title( $prefix = '', $display = true ) {
1533      return single_term_title( $prefix, $display );
1534  }
1535  
1536  /**
1537   * Display or retrieve page title for taxonomy term archive.
1538   *
1539   * Useful for taxonomy term template files for displaying the taxonomy term page title.
1540   * The prefix does not automatically place a space between the prefix, so if there should
1541   * be a space, the parameter value will need to have it at the end.
1542   *
1543   * @since 3.1.0
1544   *
1545   * @param string $prefix  Optional. What to display before the title.
1546   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1547   * @return string|void Title when retrieving.
1548   */
1549  function single_term_title( $prefix = '', $display = true ) {
1550      $term = get_queried_object();
1551  
1552      if ( ! $term ) {
1553          return;
1554      }
1555  
1556      if ( is_category() ) {
1557          /**
1558           * Filters the category archive page title.
1559           *
1560           * @since 2.0.10
1561           *
1562           * @param string $term_name Category name for archive being displayed.
1563           */
1564          $term_name = apply_filters( 'single_cat_title', $term->name );
1565      } elseif ( is_tag() ) {
1566          /**
1567           * Filters the tag archive page title.
1568           *
1569           * @since 2.3.0
1570           *
1571           * @param string $term_name Tag name for archive being displayed.
1572           */
1573          $term_name = apply_filters( 'single_tag_title', $term->name );
1574      } elseif ( is_tax() ) {
1575          /**
1576           * Filters the custom taxonomy archive page title.
1577           *
1578           * @since 3.1.0
1579           *
1580           * @param string $term_name Term name for archive being displayed.
1581           */
1582          $term_name = apply_filters( 'single_term_title', $term->name );
1583      } else {
1584          return;
1585      }
1586  
1587      if ( empty( $term_name ) ) {
1588          return;
1589      }
1590  
1591      if ( $display ) {
1592          echo $prefix . $term_name;
1593      } else {
1594          return $prefix . $term_name;
1595      }
1596  }
1597  
1598  /**
1599   * Display or retrieve page title for post archive based on date.
1600   *
1601   * Useful for when the template only needs to display the month and year,
1602   * if either are available. The prefix does not automatically place a space
1603   * between the prefix, so if there should be a space, the parameter value
1604   * will need to have it at the end.
1605   *
1606   * @since 0.71
1607   *
1608   * @global WP_Locale $wp_locale WordPress date and time locale object.
1609   *
1610   * @param string $prefix  Optional. What to display before the title.
1611   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1612   * @return string|void Title when retrieving.
1613   */
1614  function single_month_title( $prefix = '', $display = true ) {
1615      global $wp_locale;
1616  
1617      $m        = get_query_var( 'm' );
1618      $year     = get_query_var( 'year' );
1619      $monthnum = get_query_var( 'monthnum' );
1620  
1621      if ( ! empty( $monthnum ) && ! empty( $year ) ) {
1622          $my_year  = $year;
1623          $my_month = $wp_locale->get_month( $monthnum );
1624      } elseif ( ! empty( $m ) ) {
1625          $my_year  = substr( $m, 0, 4 );
1626          $my_month = $wp_locale->get_month( substr( $m, 4, 2 ) );
1627      }
1628  
1629      if ( empty( $my_month ) ) {
1630          return false;
1631      }
1632  
1633      $result = $prefix . $my_month . $prefix . $my_year;
1634  
1635      if ( ! $display ) {
1636          return $result;
1637      }
1638      echo $result;
1639  }
1640  
1641  /**
1642   * Display the archive title based on the queried object.
1643   *
1644   * @since 4.1.0
1645   *
1646   * @see get_the_archive_title()
1647   *
1648   * @param string $before Optional. Content to prepend to the title. Default empty.
1649   * @param string $after  Optional. Content to append to the title. Default empty.
1650   */
1651  function the_archive_title( $before = '', $after = '' ) {
1652      $title = get_the_archive_title();
1653  
1654      if ( ! empty( $title ) ) {
1655          echo $before . $title . $after;
1656      }
1657  }
1658  
1659  /**
1660   * Retrieve the archive title based on the queried object.
1661   *
1662   * @since 4.1.0
1663   * @since 5.5.0 The title part is wrapped in a `<span>` element.
1664   *
1665   * @return string Archive title.
1666   */
1667  function get_the_archive_title() {
1668      $title  = __( 'Archives' );
1669      $prefix = '';
1670  
1671      if ( is_category() ) {
1672          $title  = single_cat_title( '', false );
1673          $prefix = _x( 'Category:', 'category archive title prefix' );
1674      } elseif ( is_tag() ) {
1675          $title  = single_tag_title( '', false );
1676          $prefix = _x( 'Tag:', 'tag archive title prefix' );
1677      } elseif ( is_author() ) {
1678          $title  = get_the_author();
1679          $prefix = _x( 'Author:', 'author archive title prefix' );
1680      } elseif ( is_year() ) {
1681          $title  = get_the_date( _x( 'Y', 'yearly archives date format' ) );
1682          $prefix = _x( 'Year:', 'date archive title prefix' );
1683      } elseif ( is_month() ) {
1684          $title  = get_the_date( _x( 'F Y', 'monthly archives date format' ) );
1685          $prefix = _x( 'Month:', 'date archive title prefix' );
1686      } elseif ( is_day() ) {
1687          $title  = get_the_date( _x( 'F j, Y', 'daily archives date format' ) );
1688          $prefix = _x( 'Day:', 'date archive title prefix' );
1689      } elseif ( is_tax( 'post_format' ) ) {
1690          if ( is_tax( 'post_format', 'post-format-aside' ) ) {
1691              $title = _x( 'Asides', 'post format archive title' );
1692          } elseif ( is_tax( 'post_format', 'post-format-gallery' ) ) {
1693              $title = _x( 'Galleries', 'post format archive title' );
1694          } elseif ( is_tax( 'post_format', 'post-format-image' ) ) {
1695              $title = _x( 'Images', 'post format archive title' );
1696          } elseif ( is_tax( 'post_format', 'post-format-video' ) ) {
1697              $title = _x( 'Videos', 'post format archive title' );
1698          } elseif ( is_tax( 'post_format', 'post-format-quote' ) ) {
1699              $title = _x( 'Quotes', 'post format archive title' );
1700          } elseif ( is_tax( 'post_format', 'post-format-link' ) ) {
1701              $title = _x( 'Links', 'post format archive title' );
1702          } elseif ( is_tax( 'post_format', 'post-format-status' ) ) {
1703              $title = _x( 'Statuses', 'post format archive title' );
1704          } elseif ( is_tax( 'post_format', 'post-format-audio' ) ) {
1705              $title = _x( 'Audio', 'post format archive title' );
1706          } elseif ( is_tax( 'post_format', 'post-format-chat' ) ) {
1707              $title = _x( 'Chats', 'post format archive title' );
1708          }
1709      } elseif ( is_post_type_archive() ) {
1710          $title  = post_type_archive_title( '', false );
1711          $prefix = _x( 'Archives:', 'post type archive title prefix' );
1712      } elseif ( is_tax() ) {
1713          $queried_object = get_queried_object();
1714          if ( $queried_object ) {
1715              $tax    = get_taxonomy( $queried_object->taxonomy );
1716              $title  = single_term_title( '', false );
1717              $prefix = sprintf(
1718                  /* translators: %s: Taxonomy singular name. */
1719                  _x( '%s:', 'taxonomy term archive title prefix' ),
1720                  $tax->labels->singular_name
1721              );
1722          }
1723      }
1724  
1725      $original_title = $title;
1726  
1727      /**
1728       * Filters the archive title prefix.
1729       *
1730       * @since 5.5.0
1731       *
1732       * @param string $prefix Archive title prefix.
1733       */
1734      $prefix = apply_filters( 'get_the_archive_title_prefix', $prefix );
1735      if ( $prefix ) {
1736          $title = sprintf(
1737              /* translators: 1: Title prefix. 2: Title. */
1738              _x( '%1$s %2$s', 'archive title' ),
1739              $prefix,
1740              '<span>' . $title . '</span>'
1741          );
1742      }
1743  
1744      /**
1745       * Filters the archive title.
1746       *
1747       * @since 4.1.0
1748       * @since 5.5.0 Added the `$prefix` and `$original_title` parameters.
1749       *
1750       * @param string $title          Archive title to be displayed.
1751       * @param string $original_title Archive title without prefix.
1752       * @param string $prefix         Archive title prefix.
1753       */
1754      return apply_filters( 'get_the_archive_title', $title, $original_title, $prefix );
1755  }
1756  
1757  /**
1758   * Display category, tag, term, or author description.
1759   *
1760   * @since 4.1.0
1761   *
1762   * @see get_the_archive_description()
1763   *
1764   * @param string $before Optional. Content to prepend to the description. Default empty.
1765   * @param string $after  Optional. Content to append to the description. Default empty.
1766   */
1767  function the_archive_description( $before = '', $after = '' ) {
1768      $description = get_the_archive_description();
1769      if ( $description ) {
1770          echo $before . $description . $after;
1771      }
1772  }
1773  
1774  /**
1775   * Retrieves the description for an author, post type, or term archive.
1776   *
1777   * @since 4.1.0
1778   * @since 4.7.0 Added support for author archives.
1779   * @since 4.9.0 Added support for post type archives.
1780   *
1781   * @see term_description()
1782   *
1783   * @return string Archive description.
1784   */
1785  function get_the_archive_description() {
1786      if ( is_author() ) {
1787          $description = get_the_author_meta( 'description' );
1788      } elseif ( is_post_type_archive() ) {
1789          $description = get_the_post_type_description();
1790      } else {
1791          $description = term_description();
1792      }
1793  
1794      /**
1795       * Filters the archive description.
1796       *
1797       * @since 4.1.0
1798       *
1799       * @param string $description Archive description to be displayed.
1800       */
1801      return apply_filters( 'get_the_archive_description', $description );
1802  }
1803  
1804  /**
1805   * Retrieves the description for a post type archive.
1806   *
1807   * @since 4.9.0
1808   *
1809   * @return string The post type description.
1810   */
1811  function get_the_post_type_description() {
1812      $post_type = get_query_var( 'post_type' );
1813  
1814      if ( is_array( $post_type ) ) {
1815          $post_type = reset( $post_type );
1816      }
1817  
1818      $post_type_obj = get_post_type_object( $post_type );
1819  
1820      // Check if a description is set.
1821      if ( isset( $post_type_obj->description ) ) {
1822          $description = $post_type_obj->description;
1823      } else {
1824          $description = '';
1825      }
1826  
1827      /**
1828       * Filters the description for a post type archive.
1829       *
1830       * @since 4.9.0
1831       *
1832       * @param string       $description   The post type description.
1833       * @param WP_Post_Type $post_type_obj The post type object.
1834       */
1835      return apply_filters( 'get_the_post_type_description', $description, $post_type_obj );
1836  }
1837  
1838  /**
1839   * Retrieve archive link content based on predefined or custom code.
1840   *
1841   * The format can be one of four styles. The 'link' for head element, 'option'
1842   * for use in the select element, 'html' for use in list (either ol or ul HTML
1843   * elements). Custom content is also supported using the before and after
1844   * parameters.
1845   *
1846   * The 'link' format uses the `<link>` HTML element with the **archives**
1847   * relationship. The before and after parameters are not used. The text
1848   * parameter is used to describe the link.
1849   *
1850   * The 'option' format uses the option HTML element for use in select element.
1851   * The value is the url parameter and the before and after parameters are used
1852   * between the text description.
1853   *
1854   * The 'html' format, which is the default, uses the li HTML element for use in
1855   * the list HTML elements. The before parameter is before the link and the after
1856   * parameter is after the closing link.
1857   *
1858   * The custom format uses the before parameter before the link ('a' HTML
1859   * element) and the after parameter after the closing link tag. If the above
1860   * three values for the format are not used, then custom format is assumed.
1861   *
1862   * @since 1.0.0
1863   * @since 5.2.0 Added the `$selected` parameter.
1864   *
1865   * @param string $url      URL to archive.
1866   * @param string $text     Archive text description.
1867   * @param string $format   Optional. Can be 'link', 'option', 'html', or custom. Default 'html'.
1868   * @param string $before   Optional. Content to prepend to the description. Default empty.
1869   * @param string $after    Optional. Content to append to the description. Default empty.
1870   * @param bool   $selected Optional. Set to true if the current page is the selected archive page.
1871   * @return string HTML link content for archive.
1872   */
1873  function get_archives_link( $url, $text, $format = 'html', $before = '', $after = '', $selected = false ) {
1874      $text         = wptexturize( $text );
1875      $url          = esc_url( $url );
1876      $aria_current = $selected ? ' aria-current="page"' : '';
1877  
1878      if ( 'link' === $format ) {
1879          $link_html = "\t<link rel='archives' title='" . esc_attr( $text ) . "' href='$url' />\n";
1880      } elseif ( 'option' === $format ) {
1881          $selected_attr = $selected ? " selected='selected'" : '';
1882          $link_html     = "\t<option value='$url'$selected_attr>$before $text $after</option>\n";
1883      } elseif ( 'html' === $format ) {
1884          $link_html = "\t<li>$before<a href='$url'$aria_current>$text</a>$after</li>\n";
1885      } else { // Custom.
1886          $link_html = "\t$before<a href='$url'$aria_current>$text</a>$after\n";
1887      }
1888  
1889      /**
1890       * Filters the archive link content.
1891       *
1892       * @since 2.6.0
1893       * @since 4.5.0 Added the `$url`, `$text`, `$format`, `$before`, and `$after` parameters.
1894       * @since 5.2.0 Added the `$selected` parameter.
1895       *
1896       * @param string $link_html The archive HTML link content.
1897       * @param string $url       URL to archive.
1898       * @param string $text      Archive text description.
1899       * @param string $format    Link format. Can be 'link', 'option', 'html', or custom.
1900       * @param string $before    Content to prepend to the description.
1901       * @param string $after     Content to append to the description.
1902       * @param bool   $selected  True if the current page is the selected archive.
1903       */
1904      return apply_filters( 'get_archives_link', $link_html, $url, $text, $format, $before, $after, $selected );
1905  }
1906  
1907  /**
1908   * Display archive links based on type and format.
1909   *
1910   * @since 1.2.0
1911   * @since 4.4.0 The `$post_type` argument was added.
1912   * @since 5.2.0 The `$year`, `$monthnum`, `$day`, and `$w` arguments were added.
1913   *
1914   * @see get_archives_link()
1915   *
1916   * @global wpdb      $wpdb      WordPress database abstraction object.
1917   * @global WP_Locale $wp_locale WordPress date and time locale object.
1918   *
1919   * @param string|array $args {
1920   *     Default archive links arguments. Optional.
1921   *
1922   *     @type string     $type            Type of archive to retrieve. Accepts 'daily', 'weekly', 'monthly',
1923   *                                       'yearly', 'postbypost', or 'alpha'. Both 'postbypost' and 'alpha'
1924   *                                       display the same archive link list as well as post titles instead
1925   *                                       of displaying dates. The difference between the two is that 'alpha'
1926   *                                       will order by post title and 'postbypost' will order by post date.
1927   *                                       Default 'monthly'.
1928   *     @type string|int $limit           Number of links to limit the query to. Default empty (no limit).
1929   *     @type string     $format          Format each link should take using the $before and $after args.
1930   *                                       Accepts 'link' (`<link>` tag), 'option' (`<option>` tag), 'html'
1931   *                                       (`<li>` tag), or a custom format, which generates a link anchor
1932   *                                       with $before preceding and $after succeeding. Default 'html'.
1933   *     @type string     $before          Markup to prepend to the beginning of each link. Default empty.
1934   *     @type string     $after           Markup to append to the end of each link. Default empty.
1935   *     @type bool       $show_post_count Whether to display the post count alongside the link. Default false.
1936   *     @type bool|int   $echo            Whether to echo or return the links list. Default 1|true to echo.
1937   *     @type string     $order           Whether to use ascending or descending order. Accepts 'ASC', or 'DESC'.
1938   *                                       Default 'DESC'.
1939   *     @type string     $post_type       Post type. Default 'post'.
1940   *     @type string     $year            Year. Default current year.
1941   *     @type string     $monthnum        Month number. Default current month number.
1942   *     @type string     $day             Day. Default current day.
1943   *     @type string     $w               Week. Default current week.
1944   * }
1945   * @return void|string Void if 'echo' argument is true, archive links if 'echo' is false.
1946   */
1947  function wp_get_archives( $args = '' ) {
1948      global $wpdb, $wp_locale;
1949  
1950      $defaults = array(
1951          'type'            => 'monthly',
1952          'limit'           => '',
1953          'format'          => 'html',
1954          'before'          => '',
1955          'after'           => '',
1956          'show_post_count' => false,
1957          'echo'            => 1,
1958          'order'           => 'DESC',
1959          'post_type'       => 'post',
1960          'year'            => get_query_var( 'year' ),
1961          'monthnum'        => get_query_var( 'monthnum' ),
1962          'day'             => get_query_var( 'day' ),
1963          'w'               => get_query_var( 'w' ),
1964      );
1965  
1966      $parsed_args = wp_parse_args( $args, $defaults );
1967  
1968      $post_type_object = get_post_type_object( $parsed_args['post_type'] );
1969      if ( ! is_post_type_viewable( $post_type_object ) ) {
1970          return;
1971      }
1972  
1973      $parsed_args['post_type'] = $post_type_object->name;
1974  
1975      if ( '' === $parsed_args['type'] ) {
1976          $parsed_args['type'] = 'monthly';
1977      }
1978  
1979      if ( ! empty( $parsed_args['limit'] ) ) {
1980          $parsed_args['limit'] = absint( $parsed_args['limit'] );
1981          $parsed_args['limit'] = ' LIMIT ' . $parsed_args['limit'];
1982      }
1983  
1984      $order = strtoupper( $parsed_args['order'] );
1985      if ( 'ASC' !== $order ) {
1986          $order = 'DESC';
1987      }
1988  
1989      // This is what will separate dates on weekly archive links.
1990      $archive_week_separator = '&#8211;';
1991  
1992      $sql_where = $wpdb->prepare( "WHERE post_type = %s AND post_status = 'publish'", $parsed_args['post_type'] );
1993  
1994      /**
1995       * Filters the SQL WHERE clause for retrieving archives.
1996       *
1997       * @since 2.2.0
1998       *
1999       * @param string $sql_where   Portion of SQL query containing the WHERE clause.
2000       * @param array  $parsed_args An array of default arguments.
2001       */
2002      $where = apply_filters( 'getarchives_where', $sql_where, $parsed_args );
2003  
2004      /**
2005       * Filters the SQL JOIN clause for retrieving archives.
2006       *
2007       * @since 2.2.0
2008       *
2009       * @param string $sql_join    Portion of SQL query containing JOIN clause.
2010       * @param array  $parsed_args An array of default arguments.
2011       */
2012      $join = apply_filters( 'getarchives_join', '', $parsed_args );
2013  
2014      $output = '';
2015  
2016      $last_changed = wp_cache_get_last_changed( 'posts' );
2017  
2018      $limit = $parsed_args['limit'];
2019  
2020      if ( 'monthly' === $parsed_args['type'] ) {
2021          $query   = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date $order $limit";
2022          $key     = md5( $query );
2023          $key     = "wp_get_archives:$key:$last_changed";
2024          $results = wp_cache_get( $key, 'posts' );
2025          if ( ! $results ) {
2026              $results = $wpdb->get_results( $query );
2027              wp_cache_set( $key, $results, 'posts' );
2028          }
2029          if ( $results ) {
2030              $after = $parsed_args['after'];
2031              foreach ( (array) $results as $result ) {
2032                  $url = get_month_link( $result->year, $result->month );
2033                  if ( 'post' !== $parsed_args['post_type'] ) {
2034                      $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2035                  }
2036                  /* translators: 1: Month name, 2: 4-digit year. */
2037                  $text = sprintf( __( '%1$s %2$d' ), $wp_locale->get_month( $result->month ), $result->year );
2038                  if ( $parsed_args['show_post_count'] ) {
2039                      $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2040                  }
2041                  $selected = is_archive() && (string) $parsed_args['year'] === $result->year && (string) $parsed_args['monthnum'] === $result->month;
2042                  $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2043              }
2044          }
2045      } elseif ( 'yearly' === $parsed_args['type'] ) {
2046          $query   = "SELECT YEAR(post_date) AS `year`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date) ORDER BY post_date $order $limit";
2047          $key     = md5( $query );
2048          $key     = "wp_get_archives:$key:$last_changed";
2049          $results = wp_cache_get( $key, 'posts' );
2050          if ( ! $results ) {
2051              $results = $wpdb->get_results( $query );
2052              wp_cache_set( $key, $results, 'posts' );
2053          }
2054          if ( $results ) {
2055              $after = $parsed_args['after'];
2056              foreach ( (array) $results as $result ) {
2057                  $url = get_year_link( $result->year );
2058                  if ( 'post' !== $parsed_args['post_type'] ) {
2059                      $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2060                  }
2061                  $text = sprintf( '%d', $result->year );
2062                  if ( $parsed_args['show_post_count'] ) {
2063                      $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2064                  }
2065                  $selected = is_archive() && (string) $parsed_args['year'] === $result->year;
2066                  $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2067              }
2068          }
2069      } elseif ( 'daily' === $parsed_args['type'] ) {
2070          $query   = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, DAYOFMONTH(post_date) AS `dayofmonth`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date), DAYOFMONTH(post_date) ORDER BY post_date $order $limit";
2071          $key     = md5( $query );
2072          $key     = "wp_get_archives:$key:$last_changed";
2073          $results = wp_cache_get( $key, 'posts' );
2074          if ( ! $results ) {
2075              $results = $wpdb->get_results( $query );
2076              wp_cache_set( $key, $results, 'posts' );
2077          }
2078          if ( $results ) {
2079              $after = $parsed_args['after'];
2080              foreach ( (array) $results as $result ) {
2081                  $url = get_day_link( $result->year, $result->month, $result->dayofmonth );
2082                  if ( 'post' !== $parsed_args['post_type'] ) {
2083                      $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2084                  }
2085                  $date = sprintf( '%1$d-%2$02d-%3$02d 00:00:00', $result->year, $result->month, $result->dayofmonth );
2086                  $text = mysql2date( get_option( 'date_format' ), $date );
2087                  if ( $parsed_args['show_post_count'] ) {
2088                      $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2089                  }
2090                  $selected = is_archive() && (string) $parsed_args['year'] === $result->year && (string) $parsed_args['monthnum'] === $result->month && (string) $parsed_args['day'] === $result->dayofmonth;
2091                  $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2092              }
2093          }
2094      } elseif ( 'weekly' === $parsed_args['type'] ) {
2095          $week    = _wp_mysql_week( '`post_date`' );
2096          $query   = "SELECT DISTINCT $week AS `week`, YEAR( `post_date` ) AS `yr`, DATE_FORMAT( `post_date`, '%Y-%m-%d' ) AS `yyyymmdd`, count( `ID` ) AS `posts` FROM `$wpdb->posts` $join $where GROUP BY $week, YEAR( `post_date` ) ORDER BY `post_date` $order $limit";
2097          $key     = md5( $query );
2098          $key     = "wp_get_archives:$key:$last_changed";
2099          $results = wp_cache_get( $key, 'posts' );
2100          if ( ! $results ) {
2101              $results = $wpdb->get_results( $query );
2102              wp_cache_set( $key, $results, 'posts' );
2103          }
2104          $arc_w_last = '';
2105          if ( $results ) {
2106              $after = $parsed_args['after'];
2107              foreach ( (array) $results as $result ) {
2108                  if ( $result->week != $arc_w_last ) {
2109                      $arc_year       = $result->yr;
2110                      $arc_w_last     = $result->week;
2111                      $arc_week       = get_weekstartend( $result->yyyymmdd, get_option( 'start_of_week' ) );
2112                      $arc_week_start = date_i18n( get_option( 'date_format' ), $arc_week['start'] );
2113                      $arc_week_end   = date_i18n( get_option( 'date_format' ), $arc_week['end'] );
2114                      $url            = add_query_arg(
2115                          array(
2116                              'm' => $arc_year,
2117                              'w' => $result->week,
2118                          ),
2119                          home_url( '/' )
2120                      );
2121                      if ( 'post' !== $parsed_args['post_type'] ) {
2122                          $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2123                      }
2124                      $text = $arc_week_start . $archive_week_separator . $arc_week_end;
2125                      if ( $parsed_args['show_post_count'] ) {
2126                          $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2127                      }
2128                      $selected = is_archive() && (string) $parsed_args['year'] === $result->yr && (string) $parsed_args['w'] === $result->week;
2129                      $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2130                  }
2131              }
2132          }
2133      } elseif ( ( 'postbypost' === $parsed_args['type'] ) || ( 'alpha' === $parsed_args['type'] ) ) {
2134          $orderby = ( 'alpha' === $parsed_args['type'] ) ? 'post_title ASC ' : 'post_date DESC, ID DESC ';
2135          $query   = "SELECT * FROM $wpdb->posts $join $where ORDER BY $orderby $limit";
2136          $key     = md5( $query );
2137          $key     = "wp_get_archives:$key:$last_changed";
2138          $results = wp_cache_get( $key, 'posts' );
2139          if ( ! $results ) {
2140              $results = $wpdb->get_results( $query );
2141              wp_cache_set( $key, $results, 'posts' );
2142          }
2143          if ( $results ) {
2144              foreach ( (array) $results as $result ) {
2145                  if ( '0000-00-00 00:00:00' !== $result->post_date ) {
2146                      $url = get_permalink( $result );
2147                      if ( $result->post_title ) {
2148                          /** This filter is documented in wp-includes/post-template.php */
2149                          $text = strip_tags( apply_filters( 'the_title', $result->post_title, $result->ID ) );
2150                      } else {
2151                          $text = $result->ID;
2152                      }
2153                      $selected = get_the_ID() === $result->ID;
2154                      $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2155                  }
2156              }
2157          }
2158      }
2159  
2160      if ( $parsed_args['echo'] ) {
2161          echo $output;
2162      } else {
2163          return $output;
2164      }
2165  }
2166  
2167  /**
2168   * Get number of days since the start of the week.
2169   *
2170   * @since 1.5.0
2171   *
2172   * @param int $num Number of day.
2173   * @return float Days since the start of the week.
2174   */
2175  function calendar_week_mod( $num ) {
2176      $base = 7;
2177      return ( $num - $base * floor( $num / $base ) );
2178  }
2179  
2180  /**
2181   * Display calendar with days that have posts as links.
2182   *
2183   * The calendar is cached, which will be retrieved, if it exists. If there are
2184   * no posts for the month, then it will not be displayed.
2185   *
2186   * @since 1.0.0
2187   *
2188   * @global wpdb      $wpdb      WordPress database abstraction object.
2189   * @global int       $m
2190   * @global int       $monthnum
2191   * @global int       $year
2192   * @global WP_Locale $wp_locale WordPress date and time locale object.
2193   * @global array     $posts
2194   *
2195   * @param bool $initial Optional. Whether to use initial calendar names. Default true.
2196   * @param bool $echo    Optional. Whether to display the calendar output. Default true.
2197   * @return void|string Void if `$echo` argument is true, calendar HTML if `$echo` is false.
2198   */
2199  function get_calendar( $initial = true, $echo = true ) {
2200      global $wpdb, $m, $monthnum, $year, $wp_locale, $posts;
2201  
2202      $key   = md5( $m . $monthnum . $year );
2203      $cache = wp_cache_get( 'get_calendar', 'calendar' );
2204  
2205      if ( $cache && is_array( $cache ) && isset( $cache[ $key ] ) ) {
2206          /** This filter is documented in wp-includes/general-template.php */
2207          $output = apply_filters( 'get_calendar', $cache[ $key ] );
2208  
2209          if ( $echo ) {
2210              echo $output;
2211              return;
2212          }
2213  
2214          return $output;
2215      }
2216  
2217      if ( ! is_array( $cache ) ) {
2218          $cache = array();
2219      }
2220  
2221      // Quick check. If we have no posts at all, abort!
2222      if ( ! $posts ) {
2223          $gotsome = $wpdb->get_var( "SELECT 1 as test FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" );
2224          if ( ! $gotsome ) {
2225              $cache[ $key ] = '';
2226              wp_cache_set( 'get_calendar', $cache, 'calendar' );
2227              return;
2228          }
2229      }
2230  
2231      if ( isset( $_GET['w'] ) ) {
2232          $w = (int) $_GET['w'];
2233      }
2234      // week_begins = 0 stands for Sunday.
2235      $week_begins = (int) get_option( 'start_of_week' );
2236  
2237      // Let's figure out when we are.
2238      if ( ! empty( $monthnum ) && ! empty( $year ) ) {
2239          $thismonth = zeroise( (int) $monthnum, 2 );
2240          $thisyear  = (int) $year;
2241      } elseif ( ! empty( $w ) ) {
2242          // We need to get the month from MySQL.
2243          $thisyear = (int) substr( $m, 0, 4 );
2244          // It seems MySQL's weeks disagree with PHP's.
2245          $d         = ( ( $w - 1 ) * 7 ) + 6;
2246          $thismonth = $wpdb->get_var( "SELECT DATE_FORMAT((DATE_ADD('{$thisyear}0101', INTERVAL $d DAY) ), '%m')" );
2247      } elseif ( ! empty( $m ) ) {
2248          $thisyear = (int) substr( $m, 0, 4 );
2249          if ( strlen( $m ) < 6 ) {
2250              $thismonth = '01';
2251          } else {
2252              $thismonth = zeroise( (int) substr( $m, 4, 2 ), 2 );
2253          }
2254      } else {
2255          $thisyear  = current_time( 'Y' );
2256          $thismonth = current_time( 'm' );
2257      }
2258  
2259      $unixmonth = mktime( 0, 0, 0, $thismonth, 1, $thisyear );
2260      $last_day  = gmdate( 't', $unixmonth );
2261  
2262      // Get the next and previous month and year with at least one post.
2263      $previous = $wpdb->get_row(
2264          "SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
2265          FROM $wpdb->posts
2266          WHERE post_date < '$thisyear-$thismonth-01'
2267          AND post_type = 'post' AND post_status = 'publish'
2268              ORDER BY post_date DESC
2269              LIMIT 1"
2270      );
2271      $next     = $wpdb->get_row(
2272          "SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
2273          FROM $wpdb->posts
2274          WHERE post_date > '$thisyear-$thismonth-{$last_day} 23:59:59'
2275          AND post_type = 'post' AND post_status = 'publish'
2276              ORDER BY post_date ASC
2277              LIMIT 1"
2278      );
2279  
2280      /* translators: Calendar caption: 1: Month name, 2: 4-digit year. */
2281      $calendar_caption = _x( '%1$s %2$s', 'calendar caption' );
2282      $calendar_output  = '<table id="wp-calendar" class="wp-calendar-table">
2283      <caption>' . sprintf(
2284          $calendar_caption,
2285          $wp_locale->get_month( $thismonth ),
2286          gmdate( 'Y', $unixmonth )
2287      ) . '</caption>
2288      <thead>
2289      <tr>';
2290  
2291      $myweek = array();
2292  
2293      for ( $wdcount = 0; $wdcount <= 6; $wdcount++ ) {
2294          $myweek[] = $wp_locale->get_weekday( ( $wdcount + $week_begins ) % 7 );
2295      }
2296  
2297      foreach ( $myweek as $wd ) {
2298          $day_name         = $initial ? $wp_locale->get_weekday_initial( $wd ) : $wp_locale->get_weekday_abbrev( $wd );
2299          $wd               = esc_attr( $wd );
2300          $calendar_output .= "\n\t\t<th scope=\"col\" title=\"$wd\">$day_name</th>";
2301      }
2302  
2303      $calendar_output .= '
2304      </tr>
2305      </thead>
2306      <tbody>
2307      <tr>';
2308  
2309      $daywithpost = array();
2310  
2311      // Get days with posts.
2312      $dayswithposts = $wpdb->get_results(
2313          "SELECT DISTINCT DAYOFMONTH(post_date)
2314          FROM $wpdb->posts WHERE post_date >= '{$thisyear}-{$thismonth}-01 00:00:00'
2315          AND post_type = 'post' AND post_status = 'publish'
2316          AND post_date <= '{$thisyear}-{$thismonth}-{$last_day} 23:59:59'",
2317          ARRAY_N
2318      );
2319  
2320      if ( $dayswithposts ) {
2321          foreach ( (array) $dayswithposts as $daywith ) {
2322              $daywithpost[] = (int) $daywith[0];
2323          }
2324      }
2325  
2326      // See how much we should pad in the beginning.
2327      $pad = calendar_week_mod( gmdate( 'w', $unixmonth ) - $week_begins );
2328      if ( 0 != $pad ) {
2329          $calendar_output .= "\n\t\t" . '<td colspan="' . esc_attr( $pad ) . '" class="pad">&nbsp;</td>';
2330      }
2331  
2332      $newrow      = false;
2333      $daysinmonth = (int) gmdate( 't', $unixmonth );
2334  
2335      for ( $day = 1; $day <= $daysinmonth; ++$day ) {
2336          if ( isset( $newrow ) && $newrow ) {
2337              $calendar_output .= "\n\t</tr>\n\t<tr>\n\t\t";
2338          }
2339          $newrow = false;
2340  
2341          if ( current_time( 'j' ) == $day &&
2342              current_time( 'm' ) == $thismonth &&
2343              current_time( 'Y' ) == $thisyear ) {
2344              $calendar_output .= '<td id="today">';
2345          } else {
2346              $calendar_output .= '<td>';
2347          }
2348  
2349          if ( in_array( $day, $daywithpost, true ) ) {
2350              // Any posts today?
2351              $date_format = gmdate( _x( 'F j, Y', 'daily archives date format' ), strtotime( "{$thisyear}-{$thismonth}-{$day}" ) );
2352              /* translators: Post calendar label. %s: Date. */
2353              $label            = sprintf( __( 'Posts published on %s' ), $date_format );
2354              $calendar_output .= sprintf(
2355                  '<a href="%s" aria-label="%s">%s</a>',
2356                  get_day_link( $thisyear, $thismonth, $day ),
2357                  esc_attr( $label ),
2358                  $day
2359              );
2360          } else {
2361              $calendar_output .= $day;
2362          }
2363  
2364          $calendar_output .= '</td>';
2365  
2366          if ( 6 == calendar_week_mod( gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins ) ) {
2367              $newrow = true;
2368          }
2369      }
2370  
2371      $pad = 7 - calendar_week_mod( gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins );
2372      if ( 0 != $pad && 7 != $pad ) {
2373          $calendar_output .= "\n\t\t" . '<td class="pad" colspan="' . esc_attr( $pad ) . '">&nbsp;</td>';
2374      }
2375  
2376      $calendar_output .= "\n\t</tr>\n\t</tbody>";
2377  
2378      $calendar_output .= "\n\t</table>";
2379  
2380      $calendar_output .= '<nav aria-label="' . __( 'Previous and next months' ) . '" class="wp-calendar-nav">';
2381  
2382      if ( $previous ) {
2383          $calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-prev"><a href="' . get_month_link( $previous->year, $previous->month ) . '">&laquo; ' .
2384              $wp_locale->get_month_abbrev( $wp_locale->get_month( $previous->month ) ) .
2385          '</a></span>';
2386      } else {
2387          $calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-prev">&nbsp;</span>';
2388      }
2389  
2390      $calendar_output .= "\n\t\t" . '<span class="pad">&nbsp;</span>';
2391  
2392      if ( $next ) {
2393          $calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-next"><a href="' . get_month_link( $next->year, $next->month ) . '">' .
2394              $wp_locale->get_month_abbrev( $wp_locale->get_month( $next->month ) ) .
2395          ' &raquo;</a></span>';
2396      } else {
2397          $calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-next">&nbsp;</span>';
2398      }
2399  
2400      $calendar_output .= '
2401      </nav>';
2402  
2403      $cache[ $key ] = $calendar_output;
2404      wp_cache_set( 'get_calendar', $cache, 'calendar' );
2405  
2406      if ( $echo ) {
2407          /**
2408           * Filters the HTML calendar output.
2409           *
2410           * @since 3.0.0
2411           *
2412           * @param string $calendar_output HTML output of the calendar.
2413           */
2414          echo apply_filters( 'get_calendar', $calendar_output );
2415          return;
2416      }
2417      /** This filter is documented in wp-includes/general-template.php */
2418      return apply_filters( 'get_calendar', $calendar_output );
2419  }
2420  
2421  /**
2422   * Purge the cached results of get_calendar.
2423   *
2424   * @see get_calendar()
2425   * @since 2.1.0
2426   */
2427  function delete_get_calendar_cache() {
2428      wp_cache_delete( 'get_calendar', 'calendar' );
2429  }
2430  
2431  /**
2432   * Display all of the allowed tags in HTML format with attributes.
2433   *
2434   * This is useful for displaying in the comment area, which elements and
2435   * attributes are supported. As well as any plugins which want to display it.
2436   *
2437   * @since 1.0.1
2438   *
2439   * @global array $allowedtags
2440   *
2441   * @return string HTML allowed tags entity encoded.
2442   */
2443  function allowed_tags() {
2444      global $allowedtags;
2445      $allowed = '';
2446      foreach ( (array) $allowedtags as $tag => $attributes ) {
2447          $allowed .= '<' . $tag;
2448          if ( 0 < count( $attributes ) ) {
2449              foreach ( $attributes as $attribute => $limits ) {
2450                  $allowed .= ' ' . $attribute . '=""';
2451              }
2452          }
2453          $allowed .= '> ';
2454      }
2455      return htmlentities( $allowed );
2456  }
2457  
2458  /***** Date/Time tags */
2459  
2460  /**
2461   * Outputs the date in iso8601 format for xml files.
2462   *
2463   * @since 1.0.0
2464   */
2465  function the_date_xml() {
2466      echo mysql2date( 'Y-m-d', get_post()->post_date, false );
2467  }
2468  
2469  /**
2470   * Display or Retrieve the date the current post was written (once per date)
2471   *
2472   * Will only output the date if the current post's date is different from the
2473   * previous one output.
2474   *
2475   * i.e. Only one date listing will show per day worth of posts shown in the loop, even if the
2476   * function is called several times for each post.
2477   *
2478   * HTML output can be filtered with 'the_date'.
2479   * Date string output can be filtered with 'get_the_date'.
2480   *
2481   * @since 0.71
2482   *
2483   * @global string $currentday  The day of the current post in the loop.
2484   * @global string $previousday The day of the previous post in the loop.
2485   *
2486   * @param string $format Optional. PHP date format. Defaults to the 'date_format' option.
2487   * @param string $before Optional. Output before the date. Default empty.
2488   * @param string $after  Optional. Output after the date. Default empty.
2489   * @param bool   $echo   Optional. Whether to echo the date or return it. Default true.
2490   * @return string|void String if retrieving.
2491   */
2492  function the_date( $format = '', $before = '', $after = '', $echo = true ) {
2493      global $currentday, $previousday;
2494  
2495      $the_date = '';
2496  
2497      if ( is_new_day() ) {
2498          $the_date    = $before . get_the_date( $format ) . $after;
2499          $previousday = $currentday;
2500      }
2501  
2502      /**
2503       * Filters the date a post was published for display.
2504       *
2505       * @since 0.71
2506       *
2507       * @param string $the_date The formatted date string.
2508       * @param string $format   PHP date format.
2509       * @param string $before   HTML output before the date.
2510       * @param string $after    HTML output after the date.
2511       */
2512      $the_date = apply_filters( 'the_date', $the_date, $format, $before, $after );
2513  
2514      if ( $echo ) {
2515          echo $the_date;
2516      } else {
2517          return $the_date;
2518      }
2519  }
2520  
2521  /**
2522   * Retrieve the date on which the post was written.
2523   *
2524   * Unlike the_date() this function will always return the date.
2525   * Modify output with the {@see 'get_the_date'} filter.
2526   *
2527   * @since 3.0.0
2528   *
2529   * @param string      $format Optional. PHP date format. Defaults to the 'date_format' option.
2530   * @param int|WP_Post $post   Optional. Post ID or WP_Post object. Default current post.
2531   * @return string|false Date the current post was written. False on failure.
2532   */
2533  function get_the_date( $format = '', $post = null ) {
2534      $post = get_post( $post );
2535  
2536      if ( ! $post ) {
2537          return false;
2538      }
2539  
2540      $_format = ! empty( $format ) ? $format : get_option( 'date_format' );
2541  
2542      $the_date = get_post_time( $_format, false, $post, true );
2543  
2544      /**
2545       * Filters the date a post was published.
2546       *
2547       * @since 3.0.0
2548       *
2549       * @param string      $the_date The formatted date.
2550       * @param string      $format   PHP date format.
2551       * @param int|WP_Post $post     The post object or ID.
2552       */
2553      return apply_filters( 'get_the_date', $the_date, $format, $post );
2554  }
2555  
2556  /**
2557   * Display the date on which the post was last modified.
2558   *
2559   * @since 2.1.0
2560   *
2561   * @param string $format Optional. PHP date format. Defaults to the 'date_format' option.
2562   * @param string $before Optional. Output before the date. Default empty.
2563   * @param string $after  Optional. Output after the date. Default empty.
2564   * @param bool   $echo   Optional. Whether to echo the date or return it. Default true.
2565   * @return string|void String if retrieving.
2566   */
2567  function the_modified_date( $format = '', $before = '', $after = '', $echo = true ) {
2568      $the_modified_date = $before . get_the_modified_date( $format ) . $after;
2569  
2570      /**
2571       * Filters the date a post was last modified for display.
2572       *
2573       * @since 2.1.0
2574       *
2575       * @param string|false $the_modified_date The last modified date or false if no post is found.
2576       * @param string       $format            PHP date format.
2577       * @param string       $before            HTML output before the date.
2578       * @param string       $after             HTML output after the date.
2579       */
2580      $the_modified_date = apply_filters( 'the_modified_date', $the_modified_date, $format, $before, $after );
2581  
2582      if ( $echo ) {
2583          echo $the_modified_date;
2584      } else {
2585          return $the_modified_date;
2586      }
2587  
2588  }
2589  
2590  /**
2591   * Retrieve the date on which the post was last modified.
2592   *
2593   * @since 2.1.0
2594   * @since 4.6.0 Added the `$post` parameter.
2595   *
2596   * @param string      $format Optional. PHP date format. Defaults to the 'date_format' option.
2597   * @param int|WP_Post $post   Optional. Post ID or WP_Post object. Default current post.
2598   * @return string|int|false Date the current post was modified. False on failure.
2599   */
2600  function get_the_modified_date( $format = '', $post = null ) {
2601      $post = get_post( $post );
2602  
2603      if ( ! $post ) {
2604          // For backward compatibility, failures go through the filter below.
2605          $the_time = false;
2606      } else {
2607          $_format = ! empty( $format ) ? $format : get_option( 'date_format' );
2608  
2609          $the_time = get_post_modified_time( $_format, false, $post, true );
2610      }
2611  
2612      /**
2613       * Filters the date a post was last modified.
2614       *
2615       * @since 2.1.0
2616       * @since 4.6.0 Added the `$post` parameter.
2617       *
2618       * @param string|int|false $the_time The formatted date or false if no post is found.
2619       * @param string           $format   PHP date format.
2620       * @param WP_Post|null     $post     WP_Post object or null if no post is found.
2621       */
2622      return apply_filters( 'get_the_modified_date', $the_time, $format, $post );
2623  }
2624  
2625  /**
2626   * Display the time at which the post was written.
2627   *
2628   * @since 0.71
2629   *
2630   * @param string $format Optional. Format to use for retrieving the time the post
2631   *                       was written. Accepts 'G', 'U', or PHP date format.
2632   *                       Defaults to the 'time_format' option.
2633   */
2634  function the_time( $format = '' ) {
2635      /**
2636       * Filters the time a post was written for display.
2637       *
2638       * @since 0.71
2639       *
2640       * @param string $get_the_time The formatted time.
2641       * @param string $format       Format to use for retrieving the time the post
2642       *                             was written. Accepts 'G', 'U', or PHP date format.
2643       */
2644      echo apply_filters( 'the_time', get_the_time( $format ), $format );
2645  }
2646  
2647  /**
2648   * Retrieve the time at which the post was written.
2649   *
2650   * @since 1.5.0
2651   *
2652   * @param string      $format Optional. Format to use for retrieving the time the post
2653   *                            was written. Accepts 'G', 'U', or PHP date format.
2654   *                            Defaults to the 'time_format' option.
2655   * @param int|WP_Post $post   WP_Post object or ID. Default is global `$post` object.
2656   * @return string|int|false Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2657   *                          False on failure.
2658   */
2659  function get_the_time( $format = '', $post = null ) {
2660      $post = get_post( $post );
2661  
2662      if ( ! $post ) {
2663          return false;
2664      }
2665  
2666      $_format = ! empty( $format ) ? $format : get_option( 'time_format' );
2667  
2668      $the_time = get_post_time( $_format, false, $post, true );
2669  
2670      /**
2671       * Filters the time a post was written.
2672       *
2673       * @since 1.5.0
2674       *
2675       * @param string      $the_time The formatted time.
2676       * @param string      $format   Format to use for retrieving the time the post
2677       *                              was written. Accepts 'G', 'U', or PHP date format.
2678       * @param int|WP_Post $post     WP_Post object or ID.
2679       */
2680      return apply_filters( 'get_the_time', $the_time, $format, $post );
2681  }
2682  
2683  /**
2684   * Retrieve the time at which the post was written.
2685   *
2686   * @since 2.0.0
2687   *
2688   * @param string      $format    Optional. Format to use for retrieving the time the post
2689   *                               was written. Accepts 'G', 'U', or PHP date format. Default 'U'.
2690   * @param bool        $gmt       Optional. Whether to retrieve the GMT time. Default false.
2691   * @param int|WP_Post $post      WP_Post object or ID. Default is global `$post` object.
2692   * @param bool        $translate Whether to translate the time string. Default false.
2693   * @return string|int|false Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2694   *                          False on failure.
2695   */
2696  function get_post_time( $format = 'U', $gmt = false, $post = null, $translate = false ) {
2697      $post = get_post( $post );
2698  
2699      if ( ! $post ) {
2700          return false;
2701      }
2702  
2703      $source   = ( $gmt ) ? 'gmt' : 'local';
2704      $datetime = get_post_datetime( $post, 'date', $source );
2705  
2706      if ( false === $datetime ) {
2707          return false;
2708      }
2709  
2710      if ( 'U' === $format || 'G' === $format ) {
2711          $time = $datetime->getTimestamp();
2712  
2713          // Returns a sum of timestamp with timezone offset. Ideally should never be used.
2714          if ( ! $gmt ) {
2715              $time += $datetime->getOffset();
2716          }
2717      } elseif ( $translate ) {
2718          $time = wp_date( $format, $datetime->getTimestamp(), $gmt ? new DateTimeZone( 'UTC' ) : null );
2719      } else {
2720          if ( $gmt ) {
2721              $datetime = $datetime->setTimezone( new DateTimeZone( 'UTC' ) );
2722          }
2723  
2724          $time = $datetime->format( $format );
2725      }
2726  
2727      /**
2728       * Filters the localized time a post was written.
2729       *
2730       * @since 2.6.0
2731       *
2732       * @param string $time   The formatted time.
2733       * @param string $format Format to use for retrieving the time the post was written.
2734       *                       Accepts 'G', 'U', or PHP date format. Default 'U'.
2735       * @param bool   $gmt    Whether to retrieve the GMT time. Default false.
2736       */
2737      return apply_filters( 'get_post_time', $time, $format, $gmt );
2738  }
2739  
2740  /**
2741   * Retrieve post published or modified time as a `DateTimeImmutable` object instance.
2742   *
2743   * The object will be set to the timezone from WordPress settings.
2744   *
2745   * For legacy reasons, this function allows to choose to instantiate from local or UTC time in database.
2746   * Normally this should make no difference to the result. However, the values might get out of sync in database,
2747   * typically because of timezone setting changes. The parameter ensures the ability to reproduce backwards
2748   * compatible behaviors in such cases.
2749   *
2750   * @since 5.3.0
2751   *
2752   * @param int|WP_Post $post   Optional. WP_Post object or ID. Default is global `$post` object.
2753   * @param string      $field  Optional. Published or modified time to use from database. Accepts 'date' or 'modified'.
2754   *                            Default 'date'.
2755   * @param string      $source Optional. Local or UTC time to use from database. Accepts 'local' or 'gmt'.
2756   *                            Default 'local'.
2757   * @return DateTimeImmutable|false Time object on success, false on failure.
2758   */
2759  function get_post_datetime( $post = null, $field = 'date', $source = 'local' ) {
2760      $post = get_post( $post );
2761  
2762      if ( ! $post ) {
2763          return false;
2764      }
2765  
2766      $wp_timezone = wp_timezone();
2767  
2768      if ( 'gmt' === $source ) {
2769          $time     = ( 'modified' === $field ) ? $post->post_modified_gmt : $post->post_date_gmt;
2770          $timezone = new DateTimeZone( 'UTC' );
2771      } else {
2772          $time     = ( 'modified' === $field ) ? $post->post_modified : $post->post_date;
2773          $timezone = $wp_timezone;
2774      }
2775  
2776      if ( empty( $time ) || '0000-00-00 00:00:00' === $time ) {
2777          return false;
2778      }
2779  
2780      $datetime = date_create_immutable_from_format( 'Y-m-d H:i:s', $time, $timezone );
2781  
2782      if ( false === $datetime ) {
2783          return false;
2784      }
2785  
2786      return $datetime->setTimezone( $wp_timezone );
2787  }
2788  
2789  /**
2790   * Retrieve post published or modified time as a Unix timestamp.
2791   *
2792   * Note that this function returns a true Unix timestamp, not summed with timezone offset
2793   * like older WP functions.
2794   *
2795   * @since 5.3.0
2796   *
2797   * @param int|WP_Post $post  Optional. WP_Post object or ID. Default is global `$post` object.
2798   * @param string      $field Optional. Published or modified time to use from database. Accepts 'date' or 'modified'.
2799   *                           Default 'date'.
2800   * @return int|false Unix timestamp on success, false on failure.
2801   */
2802  function get_post_timestamp( $post = null, $field = 'date' ) {
2803      $datetime = get_post_datetime( $post, $field );
2804  
2805      if ( false === $datetime ) {
2806          return false;
2807      }
2808  
2809      return $datetime->getTimestamp();
2810  }
2811  
2812  /**
2813   * Display the time at which the post was last modified.
2814   *
2815   * @since 2.0.0
2816   *
2817   * @param string $format Optional. Format to use for retrieving the time the post
2818   *                       was modified. Accepts 'G', 'U', or PHP date format.
2819   *                       Defaults to the 'time_format' option.
2820   */
2821  function the_modified_time( $format = '' ) {
2822      /**
2823       * Filters the localized time a post was last modified, for display.
2824       *
2825       * @since 2.0.0
2826       *
2827       * @param string|false $get_the_modified_time The formatted time or false if no post is found.
2828       * @param string       $format                Format to use for retrieving the time the post
2829       *                                            was modified. Accepts 'G', 'U', or PHP date format.
2830       */
2831      echo apply_filters( 'the_modified_time', get_the_modified_time( $format ), $format );
2832  }
2833  
2834  /**
2835   * Retrieve the time at which the post was last modified.
2836   *
2837   * @since 2.0.0
2838   * @since 4.6.0 Added the `$post` parameter.
2839   *
2840   * @param string      $format Optional. Format to use for retrieving the time the post
2841   *                            was modified. Accepts 'G', 'U', or PHP date format.
2842   *                            Defaults to the 'time_format' option.
2843   * @param int|WP_Post $post   Optional. Post ID or WP_Post object. Default current post.
2844   * @return string|int|false Formatted date string or Unix timestamp. False on failure.
2845   */
2846  function get_the_modified_time( $format = '', $post = null ) {
2847      $post = get_post( $post );
2848  
2849      if ( ! $post ) {
2850          // For backward compatibility, failures go through the filter below.
2851          $the_time = false;
2852      } else {
2853          $_format = ! empty( $format ) ? $format : get_option( 'time_format' );
2854  
2855          $the_time = get_post_modified_time( $_format, false, $post, true );
2856      }
2857  
2858      /**
2859       * Filters the localized time a post was last modified.
2860       *
2861       * @since 2.0.0
2862       * @since 4.6.0 Added the `$post` parameter.
2863       *
2864       * @param string|int|false $the_time The formatted time or false if no post is found.
2865       * @param string           $format   Format to use for retrieving the time the post
2866       *                                   was modified. Accepts 'G', 'U', or PHP date format.
2867       * @param WP_Post|null     $post     WP_Post object or null if no post is found.
2868       */
2869      return apply_filters( 'get_the_modified_time', $the_time, $format, $post );
2870  }
2871  
2872  /**
2873   * Retrieve the time at which the post was last modified.
2874   *
2875   * @since 2.0.0
2876   *
2877   * @param string      $format    Optional. Format to use for retrieving the time the post
2878   *                               was modified. Accepts 'G', 'U', or PHP date format. Default 'U'.
2879   * @param bool        $gmt       Optional. Whether to retrieve the GMT time. Default false.
2880   * @param int|WP_Post $post      WP_Post object or ID. Default is global `$post` object.
2881   * @param bool        $translate Whether to translate the time string. Default false.
2882   * @return string|int|false Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2883   *                          False on failure.
2884   */
2885  function get_post_modified_time( $format = 'U', $gmt = false, $post = null, $translate = false ) {
2886      $post = get_post( $post );
2887  
2888      if ( ! $post ) {
2889          return false;
2890      }
2891  
2892      $source   = ( $gmt ) ? 'gmt' : 'local';
2893      $datetime = get_post_datetime( $post, 'modified', $source );
2894  
2895      if ( false === $datetime ) {
2896          return false;
2897      }
2898  
2899      if ( 'U' === $format || 'G' === $format ) {
2900          $time = $datetime->getTimestamp();
2901  
2902          // Returns a sum of timestamp with timezone offset. Ideally should never be used.
2903          if ( ! $gmt ) {
2904              $time += $datetime->getOffset();
2905          }
2906      } elseif ( $translate ) {
2907          $time = wp_date( $format, $datetime->getTimestamp(), $gmt ? new DateTimeZone( 'UTC' ) : null );
2908      } else {
2909          if ( $gmt ) {
2910              $datetime = $datetime->setTimezone( new DateTimeZone( 'UTC' ) );
2911          }
2912  
2913          $time = $datetime->format( $format );
2914      }
2915  
2916      /**
2917       * Filters the localized time a post was last modified.
2918       *
2919       * @since 2.8.0
2920       *
2921       * @param string|int $time   Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2922       * @param string     $format Format to use for retrieving the time the post was modified.
2923       *                           Accepts 'G', 'U', or PHP date format. Default 'U'.
2924       * @param bool       $gmt    Whether to retrieve the GMT time. Default false.
2925       */
2926      return apply_filters( 'get_post_modified_time', $time, $format, $gmt );
2927  }
2928  
2929  /**
2930   * Display the weekday on which the post was written.
2931   *
2932   * @since 0.71
2933   *
2934   * @global WP_Locale $wp_locale WordPress date and time locale object.
2935   */
2936  function the_weekday() {
2937      global $wp_locale;
2938  
2939      $post = get_post();
2940  
2941      if ( ! $post ) {
2942          return;
2943      }
2944  
2945      $the_weekday = $wp_locale->get_weekday( get_post_time( 'w', false, $post ) );
2946  
2947      /**
2948       * Filters the weekday on which the post was written, for display.
2949       *
2950       * @since 0.71
2951       *
2952       * @param string $the_weekday
2953       */
2954      echo apply_filters( 'the_weekday', $the_weekday );
2955  }
2956  
2957  /**
2958   * Display the weekday on which the post was written.
2959   *
2960   * Will only output the weekday if the current post's weekday is different from
2961   * the previous one output.
2962   *
2963   * @since 0.71
2964   *
2965   * @global WP_Locale $wp_locale       WordPress date and time locale object.
2966   * @global string    $currentday      The day of the current post in the loop.
2967   * @global string    $previousweekday The day of the previous post in the loop.
2968   *
2969   * @param string $before Optional. Output before the date. Default empty.
2970   * @param string $after  Optional. Output after the date. Default empty.
2971   */
2972  function the_weekday_date( $before = '', $after = '' ) {
2973      global $wp_locale, $currentday, $previousweekday;
2974  
2975      $post = get_post();
2976  
2977      if ( ! $post ) {
2978          return;
2979      }
2980  
2981      $the_weekday_date = '';
2982  
2983      if ( $currentday !== $previousweekday ) {
2984          $the_weekday_date .= $before;
2985          $the_weekday_date .= $wp_locale->get_weekday( get_post_time( 'w', false, $post ) );
2986          $the_weekday_date .= $after;
2987          $previousweekday   = $currentday;
2988      }
2989  
2990      /**
2991       * Filters the localized date on which the post was written, for display.
2992       *
2993       * @since 0.71
2994       *
2995       * @param string $the_weekday_date The weekday on which the post was written.
2996       * @param string $before           The HTML to output before the date.
2997       * @param string $after            The HTML to output after the date.
2998       */
2999      echo apply_filters( 'the_weekday_date', $the_weekday_date, $before, $after );
3000  }
3001  
3002  /**
3003   * Fire the wp_head action.
3004   *
3005   * See {@see 'wp_head'}.
3006   *
3007   * @since 1.2.0
3008   */
3009  function wp_head() {
3010      /**
3011       * Prints scripts or data in the head tag on the front end.
3012       *
3013       * @since 1.5.0
3014       */
3015      do_action( 'wp_head' );
3016  }
3017  
3018  /**
3019   * Fire the wp_footer action.
3020   *
3021   * See {@see 'wp_footer'}.
3022   *
3023   * @since 1.5.1
3024   */
3025  function wp_footer() {
3026      /**
3027       * Prints scripts or data before the closing body tag on the front end.
3028       *
3029       * @since 1.5.1
3030       */
3031      do_action( 'wp_footer' );
3032  }
3033  
3034  /**
3035   * Fire the wp_body_open action.
3036   *
3037   * See {@see 'wp_body_open'}.
3038   *
3039   * @since 5.2.0
3040   */
3041  function wp_body_open() {
3042      /**
3043       * Triggered after the opening body tag.
3044       *
3045       * @since 5.2.0
3046       */
3047      do_action( 'wp_body_open' );
3048  }
3049  
3050  /**
3051   * Display the links to the general feeds.
3052   *
3053   * @since 2.8.0
3054   *
3055   * @param array $args Optional arguments.
3056   */
3057  function feed_links( $args = array() ) {
3058      if ( ! current_theme_supports( 'automatic-feed-links' ) ) {
3059          return;
3060      }
3061  
3062      $defaults = array(
3063          /* translators: Separator between blog name and feed type in feed links. */
3064          'separator' => _x( '&raquo;', 'feed link' ),
3065          /* translators: 1: Blog title, 2: Separator (raquo). */
3066          'feedtitle' => __( '%1$s %2$s Feed' ),
3067          /* translators: 1: Blog title, 2: Separator (raquo). */
3068          'comstitle' => __( '%1$s %2$s Comments Feed' ),
3069      );
3070  
3071      $args = wp_parse_args( $args, $defaults );
3072  
3073      /**
3074       * Filters whether to display the posts feed link.
3075       *
3076       * @since 4.4.0
3077       *
3078       * @param bool $show Whether to display the posts feed link. Default true.
3079       */
3080      if ( apply_filters( 'feed_links_show_posts_feed', true ) ) {
3081          echo '<link rel="alternate" type="' . feed_content_type() . '" title="' . esc_attr( sprintf( $args['feedtitle'], get_bloginfo( 'name' ), $args['separator'] ) ) . '" href="' . esc_url( get_feed_link() ) . "\" />\n";
3082      }
3083  
3084      /**
3085       * Filters whether to display the comments feed link.
3086       *
3087       * @since 4.4.0
3088       *
3089       * @param bool $show Whether to display the comments feed link. Default true.
3090       */
3091      if ( apply_filters( 'feed_links_show_comments_feed', true ) ) {
3092          echo '<link rel="alternate" type="' . feed_content_type() . '" title="' . esc_attr( sprintf( $args['comstitle'], get_bloginfo( 'name' ), $args['separator'] ) ) . '" href="' . esc_url( get_feed_link( 'comments_' . get_default_feed() ) ) . "\" />\n";
3093      }
3094  }
3095  
3096  /**
3097   * Display the links to the extra feeds such as category feeds.
3098   *
3099   * @since 2.8.0
3100   *
3101   * @param array $args Optional arguments.
3102   */
3103  function feed_links_extra( $args = array() ) {
3104      $defaults = array(
3105          /* translators: Separator between blog name and feed type in feed links. */
3106          'separator'     => _x( '&raquo;', 'feed link' ),
3107          /* translators: 1: Blog name, 2: Separator (raquo), 3: Post title. */
3108          'singletitle'   => __( '%1$s %2$s %3$s Comments Feed' ),
3109          /* translators: 1: Blog name, 2: Separator (raquo), 3: Category name. */
3110          'cattitle'      => __( '%1$s %2$s %3$s Category Feed' ),
3111          /* translators: 1: Blog name, 2: Separator (raquo), 3: Tag name. */
3112          'tagtitle'      => __( '%1$s %2$s %3$s Tag Feed' ),
3113          /* translators: 1: Blog name, 2: Separator (raquo), 3: Term name, 4: Taxonomy singular name. */
3114          'taxtitle'      => __( '%1$s %2$s %3$s %4$s Feed' ),
3115          /* translators: 1: Blog name, 2: Separator (raquo), 3: Author name. */
3116          'authortitle'   => __( '%1$s %2$s Posts by %3$s Feed' ),
3117          /* translators: 1: Blog name, 2: Separator (raquo), 3: Search query. */
3118          'searchtitle'   => __( '%1$s %2$s Search Results for &#8220;%3$s&#8221; Feed' ),
3119          /* translators: 1: Blog name, 2: Separator (raquo), 3: Post type name. */
3120          'posttypetitle' => __( '%1$s %2$s %3$s Feed' ),
3121      );
3122  
3123      $args = wp_parse_args( $args, $defaults );
3124  
3125      if ( is_singular() ) {
3126          $id   = 0;
3127          $post = get_post( $id );
3128  
3129          if ( comments_open() || pings_open() || $post->comment_count > 0 ) {
3130              $title = sprintf( $args['singletitle'], get_bloginfo( 'name' ), $args['separator'], the_title_attribute( array( 'echo' => false ) ) );
3131              $href  = get_post_comments_feed_link( $post->ID );
3132          }
3133      } elseif ( is_post_type_archive() ) {
3134          $post_type = get_query_var( 'post_type' );
3135          if ( is_array( $post_type ) ) {
3136              $post_type = reset( $post_type );
3137          }
3138  
3139          $post_type_obj = get_post_type_object( $post_type );
3140          $title         = sprintf( $args['posttypetitle'], get_bloginfo( 'name' ), $args['separator'], $post_type_obj->labels->name );
3141          $href          = get_post_type_archive_feed_link( $post_type_obj->name );
3142      } elseif ( is_category() ) {
3143          $term = get_queried_object();
3144  
3145          if ( $term ) {
3146              $title = sprintf( $args['cattitle'], get_bloginfo( 'name' ), $args['separator'], $term->name );
3147              $href  = get_category_feed_link( $term->term_id );
3148          }
3149      } elseif ( is_tag() ) {
3150          $term = get_queried_object();
3151  
3152          if ( $term ) {
3153              $title = sprintf( $args['tagtitle'], get_bloginfo( 'name' ), $args['separator'], $term->name );
3154              $href  = get_tag_feed_link( $term->term_id );
3155          }
3156      } elseif ( is_tax() ) {
3157          $term = get_queried_object();
3158  
3159          if ( $term ) {
3160              $tax   = get_taxonomy( $term->taxonomy );
3161              $title = sprintf( $args['taxtitle'], get_bloginfo( 'name' ), $args['separator'], $term->name, $tax->labels->singular_name );
3162              $href  = get_term_feed_link( $term->term_id, $term->taxonomy );
3163          }
3164      } elseif ( is_author() ) {
3165          $author_id = (int) get_query_var( 'author' );
3166  
3167          $title = sprintf( $args['authortitle'], get_bloginfo( 'name' ), $args['separator'], get_the_author_meta( 'display_name', $author_id ) );
3168          $href  = get_author_feed_link( $author_id );
3169      } elseif ( is_search() ) {
3170          $title = sprintf( $args['searchtitle'], get_bloginfo( 'name' ), $args['separator'], get_search_query( false ) );
3171          $href  = get_search_feed_link();
3172      }
3173  
3174      if ( isset( $title ) && isset( $href ) ) {
3175          echo '<link rel="alternate" type="' . feed_content_type() . '" title="' . esc_attr( $title ) . '" href="' . esc_url( $href ) . '" />' . "\n";
3176      }
3177  }
3178  
3179  /**
3180   * Display the link to the Really Simple Discovery service endpoint.
3181   *
3182   * @link http://archipelago.phrasewise.com/rsd
3183   * @since 2.0.0
3184   */
3185  function rsd_link() {
3186      echo '<link rel="EditURI" type="application/rsd+xml" title="RSD" href="' . esc_url( site_url( 'xmlrpc.php?rsd', 'rpc' ) ) . '" />' . "\n";
3187  }
3188  
3189  /**
3190   * Display the link to the Windows Live Writer manifest file.
3191   *
3192   * @link https://msdn.microsoft.com/en-us/library/bb463265.aspx
3193   * @since 2.3.1
3194   */
3195  function wlwmanifest_link() {
3196      echo '<link rel="wlwmanifest" type="application/wlwmanifest+xml" href="' . includes_url( 'wlwmanifest.xml' ) . '" /> ' . "\n";
3197  }
3198  
3199  /**
3200   * Displays a referrer strict-origin-when-cross-origin meta tag.
3201   *
3202   * Outputs a referrer origin-when-cross-origin meta tag that tells the browser not to send the full
3203   * url as a referrer to other sites when cross-origin assets are loaded.
3204   *
3205   * Typical usage is as a wp_head callback. add_action( 'wp_head', 'wp_strict_cross_origin_referrer' );
3206   *
3207   * @since 5.7.0
3208   */
3209  function wp_strict_cross_origin_referrer() {
3210      ?>
3211      <meta name='referrer' content='strict-origin-when-cross-origin' />
3212      <?php
3213  }
3214  
3215  /**
3216   * Display site icon meta tags.
3217   *
3218   * @since 4.3.0
3219   *
3220   * @link https://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#rel-icon HTML5 specification link icon.
3221   */
3222  function wp_site_icon() {
3223      if ( ! has_site_icon() && ! is_customize_preview() ) {
3224          return;
3225      }
3226  
3227      $meta_tags = array();
3228      $icon_32   = get_site_icon_url( 32 );
3229      if ( empty( $icon_32 ) && is_customize_preview() ) {
3230          $icon_32 = '/favicon.ico'; // Serve default favicon URL in customizer so element can be updated for preview.
3231      }
3232      if ( $icon_32 ) {
3233          $meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="32x32" />', esc_url( $icon_32 ) );
3234      }
3235      $icon_192 = get_site_icon_url( 192 );
3236      if ( $icon_192 ) {
3237          $meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="192x192" />', esc_url( $icon_192 ) );
3238      }
3239      $icon_180 = get_site_icon_url( 180 );
3240      if ( $icon_180 ) {
3241          $meta_tags[] = sprintf( '<link rel="apple-touch-icon" href="%s" />', esc_url( $icon_180 ) );
3242      }
3243      $icon_270 = get_site_icon_url( 270 );
3244      if ( $icon_270 ) {
3245          $meta_tags[] = sprintf( '<meta name="msapplication-TileImage" content="%s" />', esc_url( $icon_270 ) );
3246      }
3247  
3248      /**
3249       * Filters the site icon meta tags, so plugins can add their own.
3250       *
3251       * @since 4.3.0
3252       *
3253       * @param string[] $meta_tags Array of Site Icon meta tags.
3254       */
3255      $meta_tags = apply_filters( 'site_icon_meta_tags', $meta_tags );
3256      $meta_tags = array_filter( $meta_tags );
3257  
3258      foreach ( $meta_tags as $meta_tag ) {
3259          echo "$meta_tag\n";
3260      }
3261  }
3262  
3263  /**
3264   * Prints resource hints to browsers for pre-fetching, pre-rendering
3265   * and pre-connecting to web sites.
3266   *
3267   * Gives hints to browsers to prefetch specific pages or render them
3268   * in the background, to perform DNS lookups or to begin the connection
3269   * handshake (DNS, TCP, TLS) in the background.
3270   *
3271   * These performance improving indicators work by using `<link rel"…">`.
3272   *
3273   * @since 4.6.0
3274   */
3275  function wp_resource_hints() {
3276      $hints = array(
3277          'dns-prefetch' => wp_dependencies_unique_hosts(),
3278          'preconnect'   => array(),
3279          'prefetch'     => array(),
3280          'prerender'    => array(),
3281      );
3282  
3283      /*
3284       * Add DNS prefetch for the Emoji CDN.
3285       * The path is removed in the foreach loop below.
3286       */
3287      /** This filter is documented in wp-includes/formatting.php */
3288      $hints['dns-prefetch'][] = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/13.0.0/svg/' );
3289  
3290      foreach ( $hints as $relation_type => $urls ) {
3291          $unique_urls = array();
3292  
3293          /**
3294           * Filters domains and URLs for resource hints of relation type.
3295           *
3296           * @since 4.6.0
3297           * @since 4.7.0 The `$urls` parameter accepts arrays of specific HTML attributes
3298           *              as its child elements.
3299           *
3300           * @param array  $urls {
3301           *     Array of resources and their attributes, or URLs to print for resource hints.
3302           *
3303           *     @type array|string ...$0 {
3304           *         Array of resource attributes, or a URL string.
3305           *
3306           *         @type string $href        URL to include in resource hints. Required.
3307           *         @type string $as          How the browser should treat the resource
3308           *                                   (`script`, `style`, `image`, `document`, etc).
3309           *         @type string $crossorigin Indicates the CORS policy of the specified resource.
3310           *         @type float  $pr          Expected probability that the resource hint will be used.
3311           *         @type string $type        Type of the resource (`text/html`, `text/css`, etc).
3312           *     }
3313           * }
3314           * @param string $relation_type The relation type the URLs are printed for,
3315           *                              e.g. 'preconnect' or 'prerender'.
3316           */
3317          $urls = apply_filters( 'wp_resource_hints', $urls, $relation_type );
3318  
3319          foreach ( $urls as $key => $url ) {
3320              $atts = array();
3321  
3322              if ( is_array( $url ) ) {
3323                  if ( isset( $url['href'] ) ) {
3324                      $atts = $url;
3325                      $url  = $url['href'];
3326                  } else {
3327                      continue;
3328                  }
3329              }
3330  
3331              $url = esc_url( $url, array( 'http', 'https' ) );
3332  
3333              if ( ! $url ) {
3334                  continue;
3335              }
3336  
3337              if ( isset( $unique_urls[ $url ] ) ) {
3338                  continue;
3339              }
3340  
3341              if ( in_array( $relation_type, array( 'preconnect', 'dns-prefetch' ), true ) ) {
3342                  $parsed = wp_parse_url( $url );
3343  
3344                  if ( empty( $parsed['host'] ) ) {
3345                      continue;
3346                  }
3347  
3348                  if ( 'preconnect' === $relation_type && ! empty( $parsed['scheme'] ) ) {
3349                      $url = $parsed['scheme'] . '://' . $parsed['host'];
3350                  } else {
3351                      // Use protocol-relative URLs for dns-prefetch or if scheme is missing.
3352                      $url = '//' . $parsed['host'];
3353                  }
3354              }
3355  
3356              $atts['rel']  = $relation_type;
3357              $atts['href'] = $url;
3358  
3359              $unique_urls[ $url ] = $atts;
3360          }
3361  
3362          foreach ( $unique_urls as $atts ) {
3363              $html = '';
3364  
3365              foreach ( $atts as $attr => $value ) {
3366                  if ( ! is_scalar( $value )
3367                      || ( ! in_array( $attr, array( 'as', 'crossorigin', 'href', 'pr', 'rel', 'type' ), true ) && ! is_numeric( $attr ) )
3368                  ) {
3369  
3370                      continue;
3371                  }
3372  
3373                  $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
3374  
3375                  if ( ! is_string( $attr ) ) {
3376                      $html .= " $value";
3377                  } else {
3378                      $html .= " $attr='$value'";
3379                  }
3380              }
3381  
3382              $html = trim( $html );
3383  
3384              echo "<link $html />\n";
3385          }
3386      }
3387  }
3388  
3389  /**
3390   * Retrieves a list of unique hosts of all enqueued scripts and styles.
3391   *
3392   * @since 4.6.0
3393   *
3394   * @return string[] A list of unique hosts of enqueued scripts and styles.
3395   */
3396  function wp_dependencies_unique_hosts() {
3397      global $wp_scripts, $wp_styles;
3398  
3399      $unique_hosts = array();
3400  
3401      foreach ( array( $wp_scripts, $wp_styles ) as $dependencies ) {
3402          if ( $dependencies instanceof WP_Dependencies && ! empty( $dependencies->queue ) ) {
3403              foreach ( $dependencies->queue as $handle ) {
3404                  if ( ! isset( $dependencies->registered[ $handle ] ) ) {
3405                      continue;
3406                  }
3407  
3408                  /* @var _WP_Dependency $dependency */
3409                  $dependency = $dependencies->registered[ $handle ];
3410                  $parsed     = wp_parse_url( $dependency->src );
3411  
3412                  if ( ! empty( $parsed['host'] )
3413                      && ! in_array( $parsed['host'], $unique_hosts, true ) && $parsed['host'] !== $_SERVER['SERVER_NAME']
3414                  ) {
3415                      $unique_hosts[] = $parsed['host'];
3416                  }
3417              }
3418          }
3419      }
3420  
3421      return $unique_hosts;
3422  }
3423  
3424  /**
3425   * Whether the user can access the visual editor.
3426   *
3427   * Checks if the user can access the visual editor and that it's supported by the user's browser.
3428   *
3429   * @since 2.0.0
3430   *
3431   * @global bool $wp_rich_edit Whether the user can access the visual editor.
3432   * @global bool $is_gecko     Whether the browser is Gecko-based.
3433   * @global bool $is_opera     Whether the browser is Opera.
3434   * @global bool $is_safari    Whether the browser is Safari.
3435   * @global bool $is_chrome    Whether the browser is Chrome.
3436   * @global bool $is_IE        Whether the browser is Internet Explorer.
3437   * @global bool $is_edge      Whether the browser is Microsoft Edge.
3438   *
3439   * @return bool True if the user can access the visual editor, false otherwise.
3440   */
3441  function user_can_richedit() {
3442      global $wp_rich_edit, $is_gecko, $is_opera, $is_safari, $is_chrome, $is_IE, $is_edge;
3443  
3444      if ( ! isset( $wp_rich_edit ) ) {
3445          $wp_rich_edit = false;
3446  
3447          if ( 'true' === get_user_option( 'rich_editing' ) || ! is_user_logged_in() ) { // Default to 'true' for logged out users.
3448              if ( $is_safari ) {
3449                  $wp_rich_edit = ! wp_is_mobile() || ( preg_match( '!AppleWebKit/(\d+)!', $_SERVER['HTTP_USER_AGENT'], $match ) && (int) $match[1] >= 534 );
3450              } elseif ( $is_IE ) {
3451                  $wp_rich_edit = ( strpos( $_SERVER['HTTP_USER_AGENT'], 'Trident/7.0;' ) !== false );
3452              } elseif ( $is_gecko || $is_chrome || $is_edge || ( $is_opera && ! wp_is_mobile() ) ) {
3453                  $wp_rich_edit = true;
3454              }
3455          }
3456      }
3457  
3458      /**
3459       * Filters whether the user can access the visual editor.
3460       *
3461       * @since 2.1.0
3462       *
3463       * @param bool $wp_rich_edit Whether the user can access the visual editor.
3464       */
3465      return apply_filters( 'user_can_richedit', $wp_rich_edit );
3466  }
3467  
3468  /**
3469   * Find out which editor should be displayed by default.
3470   *
3471   * Works out which of the two editors to display as the current editor for a
3472   * user. The 'html' setting is for the "Text" editor tab.
3473   *
3474   * @since 2.5.0
3475   *
3476   * @return string Either 'tinymce', or 'html', or 'test'
3477   */
3478  function wp_default_editor() {
3479      $r = user_can_richedit() ? 'tinymce' : 'html'; // Defaults.
3480      if ( wp_get_current_user() ) { // Look for cookie.
3481          $ed = get_user_setting( 'editor', 'tinymce' );
3482          $r  = ( in_array( $ed, array( 'tinymce', 'html', 'test' ), true ) ) ? $ed : $r;
3483      }
3484  
3485      /**
3486       * Filters which editor should be displayed by default.
3487       *
3488       * @since 2.5.0
3489       *
3490       * @param string $r Which editor should be displayed by default. Either 'tinymce', 'html', or 'test'.
3491       */
3492      return apply_filters( 'wp_default_editor', $r );
3493  }
3494  
3495  /**
3496   * Renders an editor.
3497   *
3498   * Using this function is the proper way to output all needed components for both TinyMCE and Quicktags.
3499   * _WP_Editors should not be used directly. See https://core.trac.wordpress.org/ticket/17144.
3500   *
3501   * NOTE: Once initialized the TinyMCE editor cannot be safely moved in the DOM. For that reason
3502   * running wp_editor() inside of a meta box is not a good idea unless only Quicktags is used.
3503   * On the post edit screen several actions can be used to include additional editors
3504   * containing TinyMCE: 'edit_page_form', 'edit_form_advanced' and 'dbx_post_sidebar'.
3505   * See https://core.trac.wordpress.org/ticket/19173 for more information.
3506   *
3507   * @see _WP_Editors::editor()
3508   * @see _WP_Editors::parse_settings()
3509   * @since 3.3.0
3510   *
3511   * @param string $content   Initial content for the editor.
3512   * @param string $editor_id HTML ID attribute value for the textarea and TinyMCE.
3513   *                          Should not contain square brackets.
3514   * @param array  $settings  See _WP_Editors::parse_settings() for description.
3515   */
3516  function wp_editor( $content, $editor_id, $settings = array() ) {
3517      if ( ! class_exists( '_WP_Editors', false ) ) {
3518          require  ABSPATH . WPINC . '/class-wp-editor.php';
3519      }
3520      _WP_Editors::editor( $content, $editor_id, $settings );
3521  }
3522  
3523  /**
3524   * Outputs the editor scripts, stylesheets, and default settings.
3525   *
3526   * The editor can be initialized when needed after page load.
3527   * See wp.editor.initialize() in wp-admin/js/editor.js for initialization options.
3528   *
3529   * @uses _WP_Editors
3530   * @since 4.8.0
3531   */
3532  function wp_enqueue_editor() {
3533      if ( ! class_exists( '_WP_Editors', false ) ) {
3534          require  ABSPATH . WPINC . '/class-wp-editor.php';
3535      }
3536  
3537      _WP_Editors::enqueue_default_editor();
3538  }
3539  
3540  /**
3541   * Enqueue assets needed by the code editor for the given settings.
3542   *
3543   * @since 4.9.0
3544   *
3545   * @see wp_enqueue_editor()
3546   * @see wp_get_code_editor_settings();
3547   * @see _WP_Editors::parse_settings()
3548   *
3549   * @param array $args {
3550   *     Args.
3551   *
3552   *     @type string   $type       The MIME type of the file to be edited.
3553   *     @type string   $file       Filename to be edited. Extension is used to sniff the type. Can be supplied as alternative to `$type` param.
3554   *     @type WP_Theme $theme      Theme being edited when on theme editor.
3555   *     @type string   $plugin     Plugin being edited when on plugin editor.
3556   *     @type array    $codemirror Additional CodeMirror setting overrides.
3557   *     @type array    $csslint    CSSLint rule overrides.
3558   *     @type array    $jshint     JSHint rule overrides.
3559   *     @type array    $htmlhint   HTMLHint rule overrides.
3560   * }
3561   * @return array|false Settings for the enqueued code editor, or false if the editor was not enqueued.
3562   */
3563  function wp_enqueue_code_editor( $args ) {
3564      if ( is_user_logged_in() && 'false' === wp_get_current_user()->syntax_highlighting ) {
3565          return false;
3566      }
3567  
3568      $settings = wp_get_code_editor_settings( $args );
3569  
3570      if ( empty( $settings ) || empty( $settings['codemirror'] ) ) {
3571          return false;
3572      }
3573  
3574      wp_enqueue_script( 'code-editor' );
3575      wp_enqueue_style( 'code-editor' );
3576  
3577      if ( isset( $settings['codemirror']['mode'] ) ) {
3578          $mode = $settings['codemirror']['mode'];
3579          if ( is_string( $mode ) ) {
3580              $mode = array(
3581                  'name' => $mode,
3582              );
3583          }
3584  
3585          if ( ! empty( $settings['codemirror']['lint'] ) ) {
3586              switch ( $mode['name'] ) {
3587                  case 'css':
3588                  case 'text/css':
3589                  case 'text/x-scss':
3590                  case 'text/x-less':
3591                      wp_enqueue_script( 'csslint' );
3592                      break;
3593                  case 'htmlmixed':
3594                  case 'text/html':
3595                  case 'php':
3596                  case 'application/x-httpd-php':
3597                  case 'text/x-php':
3598                      wp_enqueue_script( 'htmlhint' );
3599                      wp_enqueue_script( 'csslint' );
3600                      wp_enqueue_script( 'jshint' );
3601                      if ( ! current_user_can( 'unfiltered_html' ) ) {
3602                          wp_enqueue_script( 'htmlhint-kses' );
3603                      }
3604                      break;
3605                  case 'javascript':
3606                  case 'application/ecmascript':
3607                  case 'application/json':
3608                  case 'application/javascript':
3609                  case 'application/ld+json':
3610                  case 'text/typescript':
3611                  case 'application/typescript':
3612                      wp_enqueue_script( 'jshint' );
3613                      wp_enqueue_script( 'jsonlint' );
3614                      break;
3615              }
3616          }
3617      }
3618  
3619      wp_add_inline_script( 'code-editor', sprintf( 'jQuery.extend( wp.codeEditor.defaultSettings, %s );', wp_json_encode( $settings ) ) );
3620  
3621      /**
3622       * Fires when scripts and styles are enqueued for the code editor.
3623       *
3624       * @since 4.9.0
3625       *
3626       * @param array $settings Settings for the enqueued code editor.
3627       */
3628      do_action( 'wp_enqueue_code_editor', $settings );
3629  
3630      return $settings;
3631  }
3632  
3633  /**
3634   * Generate and return code editor settings.
3635   *
3636   * @since 5.0.0
3637   *
3638   * @see wp_enqueue_code_editor()
3639   *
3640   * @param array $args {
3641   *     Args.
3642   *
3643   *     @type string   $type       The MIME type of the file to be edited.
3644   *     @type string   $file       Filename to be edited. Extension is used to sniff the type. Can be supplied as alternative to `$type` param.
3645   *     @type WP_Theme $theme      Theme being edited when on theme editor.
3646   *     @type string   $plugin     Plugin being edited when on plugin editor.
3647   *     @type array    $codemirror Additional CodeMirror setting overrides.
3648   *     @type array    $csslint    CSSLint rule overrides.
3649   *     @type array    $jshint     JSHint rule overrides.
3650   *     @type array    $htmlhint   HTMLHint rule overrides.
3651   * }
3652   * @return array|false Settings for the code editor.
3653   */
3654  function wp_get_code_editor_settings( $args ) {
3655      $settings = array(
3656          'codemirror' => array(
3657              'indentUnit'       => 4,
3658              'indentWithTabs'   => true,
3659              'inputStyle'       => 'contenteditable',
3660              'lineNumbers'      => true,
3661              'lineWrapping'     => true,
3662              'styleActiveLine'  => true,
3663              'continueComments' => true,
3664              'extraKeys'        => array(
3665                  'Ctrl-Space' => 'autocomplete',
3666                  'Ctrl-/'     => 'toggleComment',
3667                  'Cmd-/'      => 'toggleComment',
3668                  'Alt-F'      => 'findPersistent',
3669                  'Ctrl-F'     => 'findPersistent',
3670                  'Cmd-F'      => 'findPersistent',
3671              ),
3672              'direction'        => 'ltr', // Code is shown in LTR even in RTL languages.
3673              'gutters'          => array(),
3674          ),
3675          'csslint'    => array(
3676              'errors'                    => true, // Parsing errors.
3677              'box-model'                 => true,
3678              'display-property-grouping' => true,
3679              'duplicate-properties'      => true,
3680              'known-properties'          => true,
3681              'outline-none'              => true,
3682          ),
3683          'jshint'     => array(
3684              // The following are copied from <https://github.com/WordPress/wordpress-develop/blob/4.8.1/.jshintrc>.
3685              'boss'     => true,
3686              'curly'    => true,
3687              'eqeqeq'   => true,
3688              'eqnull'   => true,
3689              'es3'      => true,
3690              'expr'     => true,
3691              'immed'    => true,
3692              'noarg'    => true,
3693              'nonbsp'   => true,
3694              'onevar'   => true,
3695              'quotmark' => 'single',
3696              'trailing' => true,
3697              'undef'    => true,
3698              'unused'   => true,
3699  
3700              'browser'  => true,
3701  
3702              'globals'  => array(
3703                  '_'        => false,
3704                  'Backbone' => false,
3705                  'jQuery'   => false,
3706                  'JSON'     => false,
3707                  'wp'       => false,
3708              ),
3709          ),
3710          'htmlhint'   => array(
3711              'tagname-lowercase'        => true,
3712              'attr-lowercase'           => true,
3713              'attr-value-double-quotes' => false,
3714              'doctype-first'            => false,
3715              'tag-pair'                 => true,
3716              'spec-char-escape'         => true,
3717              'id-unique'                => true,
3718              'src-not-empty'            => true,
3719              'attr-no-duplication'      => true,
3720              'alt-require'              => true,
3721              'space-tab-mixed-disabled' => 'tab',
3722              'attr-unsafe-chars'        => true,
3723          ),
3724      );
3725  
3726      $type = '';
3727      if ( isset( $args['type'] ) ) {
3728          $type = $args['type'];
3729  
3730          // Remap MIME types to ones that CodeMirror modes will recognize.
3731          if ( 'application/x-patch' === $type || 'text/x-patch' === $type ) {
3732              $type = 'text/x-diff';
3733          }
3734      } elseif ( isset( $args['file'] ) && false !== strpos( basename( $args['file'] ), '.' ) ) {
3735          $extension = strtolower( pathinfo( $args['file'], PATHINFO_EXTENSION ) );
3736          foreach ( wp_get_mime_types() as $exts => $mime ) {
3737              if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
3738                  $type = $mime;
3739                  break;
3740              }
3741          }
3742  
3743          // Supply any types that are not matched by wp_get_mime_types().
3744          if ( empty( $type ) ) {
3745              switch ( $extension ) {
3746                  case 'conf':
3747                      $type = 'text/nginx';
3748                      break;
3749                  case 'css':
3750                      $type = 'text/css';
3751                      break;
3752                  case 'diff':
3753                  case 'patch':
3754                      $type = 'text/x-diff';
3755                      break;
3756                  case 'html':
3757                  case 'htm':
3758                      $type = 'text/html';
3759                      break;
3760                  case 'http':
3761                      $type = 'message/http';
3762                      break;
3763                  case 'js':
3764                      $type = 'text/javascript';
3765                      break;
3766                  case 'json':
3767                      $type = 'application/json';
3768                      break;
3769                  case 'jsx':
3770                      $type = 'text/jsx';
3771                      break;
3772                  case 'less':
3773                      $type = 'text/x-less';
3774                      break;
3775                  case 'md':
3776                      $type = 'text/x-gfm';
3777                      break;
3778                  case 'php':
3779                  case 'phtml':
3780                  case 'php3':
3781                  case 'php4':
3782                  case 'php5':
3783                  case 'php7':
3784                  case 'phps':
3785                      $type = 'application/x-httpd-php';
3786                      break;
3787                  case 'scss':
3788                      $type = 'text/x-scss';
3789                      break;
3790                  case 'sass':
3791                      $type = 'text/x-sass';
3792                      break;
3793                  case 'sh':
3794                  case 'bash':
3795                      $type = 'text/x-sh';
3796                      break;
3797                  case 'sql':
3798                      $type = 'text/x-sql';
3799                      break;
3800                  case 'svg':
3801                      $type = 'application/svg+xml';
3802                      break;
3803                  case 'xml':
3804                      $type = 'text/xml';
3805                      break;
3806                  case 'yml':
3807                  case 'yaml':
3808                      $type = 'text/x-yaml';
3809                      break;
3810                  case 'txt':
3811                  default:
3812                      $type = 'text/plain';
3813                      break;
3814              }
3815          }
3816      }
3817  
3818      if ( in_array( $type, array( 'text/css', 'text/x-scss', 'text/x-less', 'text/x-sass' ), true ) ) {
3819          $settings['codemirror'] = array_merge(
3820              $settings['codemirror'],
3821              array(
3822                  'mode'              => $type,
3823                  'lint'              => false,
3824                  'autoCloseBrackets' => true,
3825                  'matchBrackets'     => true,
3826              )
3827          );
3828      } elseif ( 'text/x-diff' === $type ) {
3829          $settings['codemirror'] = array_merge(
3830              $settings['codemirror'],
3831              array(
3832                  'mode' => 'diff',
3833              )
3834          );
3835      } elseif ( 'text/html' === $type ) {
3836          $settings['codemirror'] = array_merge(
3837              $settings['codemirror'],
3838              array(
3839                  'mode'              => 'htmlmixed',
3840                  'lint'              => true,
3841                  'autoCloseBrackets' => true,
3842                  'autoCloseTags'     => true,
3843                  'matchTags'         => array(
3844                      'bothTags' => true,
3845                  ),
3846              )
3847          );
3848  
3849          if ( ! current_user_can( 'unfiltered_html' ) ) {
3850              $settings['htmlhint']['kses'] = wp_kses_allowed_html( 'post' );
3851          }
3852      } elseif ( 'text/x-gfm' === $type ) {
3853          $settings['codemirror'] = array_merge(
3854              $settings['codemirror'],
3855              array(
3856                  'mode'                => 'gfm',
3857                  'highlightFormatting' => true,
3858              )
3859          );
3860      } elseif ( 'application/javascript' === $type || 'text/javascript' === $type ) {
3861          $settings['codemirror'] = array_merge(
3862              $settings['codemirror'],
3863              array(
3864                  'mode'              => 'javascript',
3865                  'lint'              => true,
3866                  'autoCloseBrackets' => true,
3867                  'matchBrackets'     => true,
3868              )
3869          );
3870      } elseif ( false !== strpos( $type, 'json' ) ) {
3871          $settings['codemirror'] = array_merge(
3872              $settings['codemirror'],
3873              array(
3874                  'mode'              => array(
3875                      'name' => 'javascript',
3876                  ),
3877                  'lint'              => true,
3878                  'autoCloseBrackets' => true,
3879                  'matchBrackets'     => true,
3880              )
3881          );
3882          if ( 'application/ld+json' === $type ) {
3883              $settings['codemirror']['mode']['jsonld'] = true;
3884          } else {
3885              $settings['codemirror']['mode']['json'] = true;
3886          }
3887      } elseif ( false !== strpos( $type, 'jsx' ) ) {
3888          $settings['codemirror'] = array_merge(
3889              $settings['codemirror'],
3890              array(
3891                  'mode'              => 'jsx',
3892                  'autoCloseBrackets' => true,
3893                  'matchBrackets'     => true,
3894              )
3895          );
3896      } elseif ( 'text/x-markdown' === $type ) {
3897          $settings['codemirror'] = array_merge(
3898              $settings['codemirror'],
3899              array(
3900                  'mode'                => 'markdown',
3901                  'highlightFormatting' => true,
3902              )
3903          );
3904      } elseif ( 'text/nginx' === $type ) {
3905          $settings['codemirror'] = array_merge(
3906              $settings['codemirror'],
3907              array(
3908                  'mode' => 'nginx',
3909              )
3910          );
3911      } elseif ( 'application/x-httpd-php' === $type ) {
3912          $settings['codemirror'] = array_merge(
3913              $settings['codemirror'],
3914              array(
3915                  'mode'              => 'php',
3916                  'autoCloseBrackets' => true,
3917                  'autoCloseTags'     => true,
3918                  'matchBrackets'     => true,
3919                  'matchTags'         => array(
3920                      'bothTags' => true,
3921                  ),
3922              )
3923          );
3924      } elseif ( 'text/x-sql' === $type || 'text/x-mysql' === $type ) {
3925          $settings['codemirror'] = array_merge(
3926              $settings['codemirror'],
3927              array(
3928                  'mode'              => 'sql',
3929                  'autoCloseBrackets' => true,
3930                  'matchBrackets'     => true,
3931              )
3932          );
3933      } elseif ( false !== strpos( $type, 'xml' ) ) {
3934          $settings['codemirror'] = array_merge(
3935              $settings['codemirror'],
3936              array(
3937                  'mode'              => 'xml',
3938                  'autoCloseBrackets' => true,
3939                  'autoCloseTags'     => true,
3940                  'matchTags'         => array(
3941                      'bothTags' => true,
3942                  ),
3943              )
3944          );
3945      } elseif ( 'text/x-yaml' === $type ) {
3946          $settings['codemirror'] = array_merge(
3947              $settings['codemirror'],
3948              array(
3949                  'mode' => 'yaml',
3950              )
3951          );
3952      } else {
3953          $settings['codemirror']['mode'] = $type;
3954      }
3955  
3956      if ( ! empty( $settings['codemirror']['lint'] ) ) {
3957          $settings['codemirror']['gutters'][] = 'CodeMirror-lint-markers';
3958      }
3959  
3960      // Let settings supplied via args override any defaults.
3961      foreach ( wp_array_slice_assoc( $args, array( 'codemirror', 'csslint', 'jshint', 'htmlhint' ) ) as $key => $value ) {
3962          $settings[ $key ] = array_merge(
3963              $settings[ $key ],
3964              $value
3965          );
3966      }
3967  
3968      /**
3969       * Filters settings that are passed into the code editor.
3970       *
3971       * Returning a falsey value will disable the syntax-highlighting code editor.
3972       *
3973       * @since 4.9.0
3974       *
3975       * @param array $settings The array of settings passed to the code editor.
3976       *                        A falsey value disables the editor.
3977       * @param array $args {
3978       *     Args passed when calling `get_code_editor_settings()`.
3979       *
3980       *     @type string   $type       The MIME type of the file to be edited.
3981       *     @type string   $file       Filename being edited.
3982       *     @type WP_Theme $theme      Theme being edited when on theme editor.
3983       *     @type string   $plugin     Plugin being edited when on plugin editor.
3984       *     @type array    $codemirror Additional CodeMirror setting overrides.
3985       *     @type array    $csslint    CSSLint rule overrides.
3986       *     @type array    $jshint     JSHint rule overrides.
3987       *     @type array    $htmlhint   HTMLHint rule overrides.
3988       * }
3989       */
3990      return apply_filters( 'wp_code_editor_settings', $settings, $args );
3991  }
3992  
3993  /**
3994   * Retrieves the contents of the search WordPress query variable.
3995   *
3996   * The search query string is passed through esc_attr() to ensure that it is safe
3997   * for placing in an HTML attribute.
3998   *
3999   * @since 2.3.0
4000   *
4001   * @param bool $escaped Whether the result is escaped. Default true.
4002   *                      Only use when you are later escaping it. Do not use unescaped.
4003   * @return string
4004   */
4005  function get_search_query( $escaped = true ) {
4006      /**
4007       * Filters the contents of the search query variable.
4008       *
4009       * @since 2.3.0
4010       *
4011       * @param mixed $search Contents of the search query variable.
4012       */
4013      $query = apply_filters( 'get_search_query', get_query_var( 's' ) );
4014  
4015      if ( $escaped ) {
4016          $query = esc_attr( $query );
4017      }
4018      return $query;
4019  }
4020  
4021  /**
4022   * Displays the contents of the search query variable.
4023   *
4024   * The search query string is passed through esc_attr() to ensure that it is safe
4025   * for placing in an HTML attribute.
4026   *
4027   * @since 2.1.0
4028   */
4029  function the_search_query() {
4030      /**
4031       * Filters the contents of the search query variable for display.
4032       *
4033       * @since 2.3.0
4034       *
4035       * @param mixed $search Contents of the search query variable.
4036       */
4037      echo esc_attr( apply_filters( 'the_search_query', get_search_query( false ) ) );
4038  }
4039  
4040  /**
4041   * Gets the language attributes for the 'html' tag.
4042   *
4043   * Builds up a set of HTML attributes containing the text direction and language
4044   * information for the page.
4045   *
4046   * @since 4.3.0
4047   *
4048   * @param string $doctype Optional. The type of HTML document. Accepts 'xhtml' or 'html'. Default 'html'.
4049   */
4050  function get_language_attributes( $doctype = 'html' ) {
4051      $attributes = array();
4052  
4053      if ( function_exists( 'is_rtl' ) && is_rtl() ) {
4054          $attributes[] = 'dir="rtl"';
4055      }
4056  
4057      $lang = get_bloginfo( 'language' );
4058      if ( $lang ) {
4059          if ( 'text/html' === get_option( 'html_type' ) || 'html' === $doctype ) {
4060              $attributes[] = 'lang="' . esc_attr( $lang ) . '"';
4061          }
4062  
4063          if ( 'text/html' !== get_option( 'html_type' ) || 'xhtml' === $doctype ) {
4064              $attributes[] = 'xml:lang="' . esc_attr( $lang ) . '"';
4065          }
4066      }
4067  
4068      $output = implode( ' ', $attributes );
4069  
4070      /**
4071       * Filters the language attributes for display in the 'html' tag.
4072       *
4073       * @since 2.5.0
4074       * @since 4.3.0 Added the `$doctype` parameter.
4075       *
4076       * @param string $output A space-separated list of language attributes.
4077       * @param string $doctype The type of HTML document (xhtml|html).
4078       */
4079      return apply_filters( 'language_attributes', $output, $doctype );
4080  }
4081  
4082  /**
4083   * Displays the language attributes for the 'html' tag.
4084   *
4085   * Builds up a set of HTML attributes containing the text direction and language
4086   * information for the page.
4087   *
4088   * @since 2.1.0
4089   * @since 4.3.0 Converted into a wrapper for get_language_attributes().
4090   *
4091   * @param string $doctype Optional. The type of HTML document. Accepts 'xhtml' or 'html'. Default 'html'.
4092   */
4093  function language_attributes( $doctype = 'html' ) {
4094      echo get_language_attributes( $doctype );
4095  }
4096  
4097  /**
4098   * Retrieves paginated links for archive post pages.
4099   *
4100   * Technically, the function can be used to create paginated link list for any
4101   * area. The 'base' argument is used to reference the url, which will be used to
4102   * create the paginated links. The 'format' argument is then used for replacing
4103   * the page number. It is however, most likely and by default, to be used on the
4104   * archive post pages.
4105   *
4106   * The 'type' argument controls format of the returned value. The default is
4107   * 'plain', which is just a string with the links separated by a newline
4108   * character. The other possible values are either 'array' or 'list'. The
4109   * 'array' value will return an array of the paginated link list to offer full
4110   * control of display. The 'list' value will place all of the paginated links in
4111   * an unordered HTML list.
4112   *
4113   * The 'total' argument is the total amount of pages and is an integer. The
4114   * 'current' argument is the current page number and is also an integer.
4115   *
4116   * An example of the 'base' argument is "http://example.com/all_posts.php%_%"
4117   * and the '%_%' is required. The '%_%' will be replaced by the contents of in
4118   * the 'format' argument. An example for the 'format' argument is "?page=%#%"
4119   * and the '%#%' is also required. The '%#%' will be replaced with the page
4120   * number.
4121   *
4122   * You can include the previous and next links in the list by setting the
4123   * 'prev_next' argument to true, which it is by default. You can set the
4124   * previous text, by using the 'prev_text' argument. You can set the next text
4125   * by setting the 'next_text' argument.
4126   *
4127   * If the 'show_all' argument is set to true, then it will show all of the pages
4128   * instead of a short list of the pages near the current page. By default, the
4129   * 'show_all' is set to false and controlled by the 'end_size' and 'mid_size'
4130   * arguments. The 'end_size' argument is how many numbers on either the start
4131   * and the end list edges, by default is 1. The 'mid_size' argument is how many
4132   * numbers to either side of current page, but not including current page.
4133   *
4134   * It is possible to add query vars to the link by using the 'add_args' argument
4135   * and see add_query_arg() for more information.
4136   *
4137   * The 'before_page_number' and 'after_page_number' arguments allow users to
4138   * augment the links themselves. Typically this might be to add context to the
4139   * numbered links so that screen reader users understand what the links are for.
4140   * The text strings are added before and after the page number - within the
4141   * anchor tag.
4142   *
4143   * @since 2.1.0
4144   * @since 4.9.0 Added the `aria_current` argument.
4145   *
4146   * @global WP_Query   $wp_query   WordPress Query object.
4147   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
4148   *
4149   * @param string|array $args {
4150   *     Optional. Array or string of arguments for generating paginated links for archives.
4151   *
4152   *     @type string $base               Base of the paginated url. Default empty.
4153   *     @type string $format             Format for the pagination structure. Default empty.
4154   *     @type int    $total              The total amount of pages. Default is the value WP_Query's
4155   *                                      `max_num_pages` or 1.
4156   *     @type int    $current            The current page number. Default is 'paged' query var or 1.
4157   *     @type string $aria_current       The value for the aria-current attribute. Possible values are 'page',
4158   *                                      'step', 'location', 'date', 'time', 'true', 'false'. Default is 'page'.
4159   *     @type bool   $show_all           Whether to show all pages. Default false.
4160   *     @type int    $end_size           How many numbers on either the start and the end list edges.
4161   *                                      Default 1.
4162   *     @type int    $mid_size           How many numbers to either side of the current pages. Default 2.
4163   *     @type bool   $prev_next          Whether to include the previous and next links in the list. Default true.
4164   *     @type bool   $prev_text          The previous page text. Default '&laquo; Previous'.
4165   *     @type bool   $next_text          The next page text. Default 'Next &raquo;'.
4166   *     @type string $type               Controls format of the returned value. Possible values are 'plain',
4167   *                                      'array' and 'list'. Default is 'plain'.
4168   *     @type array  $add_args           An array of query args to add. Default false.
4169   *     @type string $add_fragment       A string to append to each link. Default empty.
4170   *     @type string $before_page_number A string to appear before the page number. Default empty.
4171   *     @type string $after_page_number  A string to append after the page number. Default empty.
4172   * }
4173   * @return string|array|void String of page links or array of page links, depending on 'type' argument.
4174   *                           Void if total number of pages is less than 2.
4175   */
4176  function paginate_links( $args = '' ) {
4177      global $wp_query, $wp_rewrite;
4178  
4179      // Setting up default values based on the current URL.
4180      $pagenum_link = html_entity_decode( get_pagenum_link() );
4181      $url_parts    = explode( '?', $pagenum_link );
4182  
4183      // Get max pages and current page out of the current query, if available.
4184      $total   = isset( $wp_query->max_num_pages ) ? $wp_query->max_num_pages : 1;
4185      $current = get_query_var( 'paged' ) ? (int) get_query_var( 'paged' ) : 1;
4186  
4187      // Append the format placeholder to the base URL.
4188      $pagenum_link = trailingslashit( $url_parts[0] ) . '%_%';
4189  
4190      // URL base depends on permalink settings.
4191      $format  = $wp_rewrite->using_index_permalinks() && ! strpos( $pagenum_link, 'index.php' ) ? 'index.php/' : '';
4192      $format .= $wp_rewrite->using_permalinks() ? user_trailingslashit( $wp_rewrite->pagination_base . '/%#%', 'paged' ) : '?paged=%#%';
4193  
4194      $defaults = array(
4195          'base'               => $pagenum_link, // http://example.com/all_posts.php%_% : %_% is replaced by format (below).
4196          'format'             => $format, // ?page=%#% : %#% is replaced by the page number.
4197          'total'              => $total,
4198          'current'            => $current,
4199          'aria_current'       => 'page',
4200          'show_all'           => false,
4201          'prev_next'          => true,
4202          'prev_text'          => __( '&laquo; Previous' ),
4203          'next_text'          => __( 'Next &raquo;' ),
4204          'end_size'           => 1,
4205          'mid_size'           => 2,
4206          'type'               => 'plain',
4207          'add_args'           => array(), // Array of query args to add.
4208          'add_fragment'       => '',
4209          'before_page_number' => '',
4210          'after_page_number'  => '',
4211      );
4212  
4213      $args = wp_parse_args( $args, $defaults );
4214  
4215      if ( ! is_array( $args['add_args'] ) ) {
4216          $args['add_args'] = array();
4217      }
4218  
4219      // Merge additional query vars found in the original URL into 'add_args' array.
4220      if ( isset( $url_parts[1] ) ) {
4221          // Find the format argument.
4222          $format       = explode( '?', str_replace( '%_%', $args['format'], $args['base'] ) );
4223          $format_query = isset( $format[1] ) ? $format[1] : '';
4224          wp_parse_str( $format_query, $format_args );
4225  
4226          // Find the query args of the requested URL.
4227          wp_parse_str( $url_parts[1], $url_query_args );
4228  
4229          // Remove the format argument from the array of query arguments, to avoid overwriting custom format.
4230          foreach ( $format_args as $format_arg => $format_arg_value ) {
4231              unset( $url_query_args[ $format_arg ] );
4232          }
4233  
4234          $args['add_args'] = array_merge( $args['add_args'], urlencode_deep( $url_query_args ) );
4235      }
4236  
4237      // Who knows what else people pass in $args.
4238      $total = (int) $args['total'];
4239      if ( $total < 2 ) {
4240          return;
4241      }
4242      $current  = (int) $args['current'];
4243      $end_size = (int) $args['end_size']; // Out of bounds? Make it the default.
4244      if ( $end_size < 1 ) {
4245          $end_size = 1;
4246      }
4247      $mid_size = (int) $args['mid_size'];
4248      if ( $mid_size < 0 ) {
4249          $mid_size = 2;
4250      }
4251  
4252      $add_args   = $args['add_args'];
4253      $r          = '';
4254      $page_links = array();
4255      $dots       = false;
4256  
4257      if ( $args['prev_next'] && $current && 1 < $current ) :
4258          $link = str_replace( '%_%', 2 == $current ? '' : $args['format'], $args['base'] );
4259          $link = str_replace( '%#%', $current - 1, $link );
4260          if ( $add_args ) {
4261              $link = add_query_arg( $add_args, $link );
4262          }
4263          $link .= $args['add_fragment'];
4264  
4265          $page_links[] = sprintf(
4266              '<a class="prev page-numbers" href="%s">%s</a>',
4267              /**
4268               * Filters the paginated links for the given archive pages.
4269               *
4270               * @since 3.0.0
4271               *
4272               * @param string $link The paginated link URL.
4273               */
4274              esc_url( apply_filters( 'paginate_links', $link ) ),
4275              $args['prev_text']
4276          );
4277      endif;
4278  
4279      for ( $n = 1; $n <= $total; $n++ ) :
4280          if ( $n == $current ) :
4281              $page_links[] = sprintf(
4282                  '<span aria-current="%s" class="page-numbers current">%s</span>',
4283                  esc_attr( $args['aria_current'] ),
4284                  $args['before_page_number'] . number_format_i18n( $n ) . $args['after_page_number']
4285              );
4286  
4287              $dots = true;
4288          else :
4289              if ( $args['show_all'] || ( $n <= $end_size || ( $current && $n >= $current - $mid_size && $n <= $current + $mid_size ) || $n > $total - $end_size ) ) :
4290                  $link = str_replace( '%_%', 1 == $n ? '' : $args['format'], $args['base'] );
4291                  $link = str_replace( '%#%', $n, $link );
4292                  if ( $add_args ) {
4293                      $link = add_query_arg( $add_args, $link );
4294                  }
4295                  $link .= $args['add_fragment'];
4296  
4297                  $page_links[] = sprintf(
4298                      '<a class="page-numbers" href="%s">%s</a>',
4299                      /** This filter is documented in wp-includes/general-template.php */
4300                      esc_url( apply_filters( 'paginate_links', $link ) ),
4301                      $args['before_page_number'] . number_format_i18n( $n ) . $args['after_page_number']
4302                  );
4303  
4304                  $dots = true;
4305              elseif ( $dots && ! $args['show_all'] ) :
4306                  $page_links[] = '<span class="page-numbers dots">' . __( '&hellip;' ) . '</span>';
4307  
4308                  $dots = false;
4309              endif;
4310          endif;
4311      endfor;
4312  
4313      if ( $args['prev_next'] && $current && $current < $total ) :
4314          $link = str_replace( '%_%', $args['format'], $args['base'] );
4315          $link = str_replace( '%#%', $current + 1, $link );
4316          if ( $add_args ) {
4317              $link = add_query_arg( $add_args, $link );
4318          }
4319          $link .= $args['add_fragment'];
4320  
4321          $page_links[] = sprintf(
4322              '<a class="next page-numbers" href="%s">%s</a>',
4323              /** This filter is documented in wp-includes/general-template.php */
4324              esc_url( apply_filters( 'paginate_links', $link ) ),
4325              $args['next_text']
4326          );
4327      endif;
4328  
4329      switch ( $args['type'] ) {
4330          case 'array':
4331              return $page_links;
4332  
4333          case 'list':
4334              $r .= "<ul class='page-numbers'>\n\t<li>";
4335              $r .= implode( "</li>\n\t<li>", $page_links );
4336              $r .= "</li>\n</ul>\n";
4337              break;
4338  
4339          default:
4340              $r = implode( "\n", $page_links );
4341              break;
4342      }
4343  
4344      /**
4345       * Filters the HTML output of paginated links for archives.
4346       *
4347       * @since 5.7.0
4348       *
4349       * @param string $r    HTML output.
4350       * @param array  $args An array of arguments. See paginate_links()
4351       *                     for information on accepted arguments.
4352       */
4353      $r = apply_filters( 'paginate_links_output', $r, $args );
4354  
4355      return $r;
4356  }
4357  
4358  /**
4359   * Registers an admin color scheme css file.
4360   *
4361   * Allows a plugin to register a new admin color scheme. For example:
4362   *
4363   *     wp_admin_css_color( 'classic', __( 'Classic' ), admin_url( "css/colors-classic.css" ), array(
4364   *         '#07273E', '#14568A', '#D54E21', '#2683AE'
4365   *     ) );
4366   *
4367   * @since 2.5.0
4368   *
4369   * @global array $_wp_admin_css_colors
4370   *
4371   * @param string $key    The unique key for this theme.
4372   * @param string $name   The name of the theme.
4373   * @param string $url    The URL of the CSS file containing the color scheme.
4374   * @param array  $colors Optional. An array of CSS color definition strings which are used
4375   *                       to give the user a feel for the theme.
4376   * @param array  $icons {
4377   *     Optional. CSS color definitions used to color any SVG icons.
4378   *
4379   *     @type string $base    SVG icon base color.
4380   *     @type string $focus   SVG icon color on focus.
4381   *     @type string $current SVG icon color of current admin menu link.
4382   * }
4383   */
4384  function wp_admin_css_color( $key, $name, $url, $colors = array(), $icons = array() ) {
4385      global $_wp_admin_css_colors;
4386  
4387      if ( ! isset( $_wp_admin_css_colors ) ) {
4388          $_wp_admin_css_colors = array();
4389      }
4390  
4391      $_wp_admin_css_colors[ $key ] = (object) array(
4392          'name'        => $name,
4393          'url'         => $url,
4394          'colors'      => $colors,
4395          'icon_colors' => $icons,
4396      );
4397  }
4398  
4399  /**
4400   * Registers the default admin color schemes.
4401   *
4402   * Registers the initial set of eight color schemes in the Profile section
4403   * of the dashboard which allows for styling the admin menu and toolbar.
4404   *
4405   * @see wp_admin_css_color()
4406   *
4407   * @since 3.0.0
4408   */
4409  function register_admin_color_schemes() {
4410      $suffix  = is_rtl() ? '-rtl' : '';
4411      $suffix .= SCRIPT_DEBUG ? '' : '.min';
4412  
4413      wp_admin_css_color(
4414          'fresh',
4415          _x( 'Default', 'admin color scheme' ),
4416          false,
4417          array( '#1d2327', '#2c3338', '#2271b1', '#72aee6' ),
4418          array(
4419              'base'    => '#a7aaad',
4420              'focus'   => '#72aee6',
4421              'current' => '#fff',
4422          )
4423      );
4424  
4425      wp_admin_css_color(
4426          'light',
4427          _x( 'Light', 'admin color scheme' ),
4428          admin_url( "css/colors/light/colors$suffix.css" ),
4429          array( '#e5e5e5', '#999', '#d64e07', '#04a4cc' ),
4430          array(
4431              'base'    => '#999',
4432              'focus'   => '#ccc',
4433              'current' => '#ccc',
4434          )
4435      );
4436  
4437      wp_admin_css_color(
4438          'modern',
4439          _x( 'Modern', 'admin color scheme' ),
4440          admin_url( "css/colors/modern/colors$suffix.css" ),
4441          array( '#1e1e1e', '#3858e9', '#33f078' ),
4442          array(
4443              'base'    => '#f3f1f1',
4444              'focus'   => '#fff',
4445              'current' => '#fff',
4446          )
4447      );
4448  
4449      wp_admin_css_color(
4450          'blue',
4451          _x( 'Blue', 'admin color scheme' ),
4452          admin_url( "css/colors/blue/colors$suffix.css" ),
4453          array( '#096484', '#4796b3', '#52accc', '#74B6CE' ),
4454          array(
4455              'base'    => '#e5f8ff',
4456              'focus'   => '#fff',
4457              'current' => '#fff',
4458          )
4459      );
4460  
4461      wp_admin_css_color(
4462          'midnight',
4463          _x( 'Midnight', 'admin color scheme' ),
4464          admin_url( "css/colors/midnight/colors$suffix.css" ),
4465          array( '#25282b', '#363b3f', '#69a8bb', '#e14d43' ),
4466          array(
4467              'base'    => '#f1f2f3',
4468              'focus'   => '#fff',
4469              'current' => '#fff',
4470          )
4471      );
4472  
4473      wp_admin_css_color(
4474          'sunrise',
4475          _x( 'Sunrise', 'admin color scheme' ),
4476          admin_url( "css/colors/sunrise/colors$suffix.css" ),
4477          array( '#b43c38', '#cf4944', '#dd823b', '#ccaf0b' ),
4478          array(
4479              'base'    => '#f3f1f1',
4480              'focus'   => '#fff',
4481              'current' => '#fff',
4482          )
4483      );
4484  
4485      wp_admin_css_color(
4486          'ectoplasm',
4487          _x( 'Ectoplasm', 'admin color scheme' ),
4488          admin_url( "css/colors/ectoplasm/colors$suffix.css" ),
4489          array( '#413256', '#523f6d', '#a3b745', '#d46f15' ),
4490          array(
4491              'base'    => '#ece6f6',
4492              'focus'   => '#fff',
4493              'current' => '#fff',
4494          )
4495      );
4496  
4497      wp_admin_css_color(
4498          'ocean',
4499          _x( 'Ocean', 'admin color scheme' ),
4500          admin_url( "css/colors/ocean/colors$suffix.css" ),
4501          array( '#627c83', '#738e96', '#9ebaa0', '#aa9d88' ),
4502          array(
4503              'base'    => '#f2fcff',
4504              'focus'   => '#fff',
4505              'current' => '#fff',
4506          )
4507      );
4508  
4509      wp_admin_css_color(
4510          'coffee',
4511          _x( 'Coffee', 'admin color scheme' ),
4512          admin_url( "css/colors/coffee/colors$suffix.css" ),
4513          array( '#46403c', '#59524c', '#c7a589', '#9ea476' ),
4514          array(
4515              'base'    => '#f3f2f1',
4516              'focus'   => '#fff',
4517              'current' => '#fff',
4518          )
4519      );
4520  
4521  }
4522  
4523  /**
4524   * Displays the URL of a WordPress admin CSS file.
4525   *
4526   * @see WP_Styles::_css_href and its {@see 'style_loader_src'} filter.
4527   *
4528   * @since 2.3.0
4529   *
4530   * @param string $file file relative to wp-admin/ without its ".css" extension.
4531   * @return string
4532   */
4533  function wp_admin_css_uri( $file = 'wp-admin' ) {
4534      if ( defined( 'WP_INSTALLING' ) ) {
4535          $_file = "./$file.css";
4536      } else {
4537          $_file = admin_url( "$file.css" );
4538      }
4539      $_file = add_query_arg( 'version', get_bloginfo( 'version' ), $_file );
4540  
4541      /**
4542       * Filters the URI of a WordPress admin CSS file.
4543       *
4544       * @since 2.3.0
4545       *
4546       * @param string $_file Relative path to the file with query arguments attached.
4547       * @param string $file  Relative path to the file, minus its ".css" extension.
4548       */
4549      return apply_filters( 'wp_admin_css_uri', $_file, $file );
4550  }
4551  
4552  /**
4553   * Enqueues or directly prints a stylesheet link to the specified CSS file.
4554   *
4555   * "Intelligently" decides to enqueue or to print the CSS file. If the
4556   * {@see 'wp_print_styles'} action has *not* yet been called, the CSS file will be
4557   * enqueued. If the {@see 'wp_print_styles'} action has been called, the CSS link will
4558   * be printed. Printing may be forced by passing true as the $force_echo
4559   * (second) parameter.
4560   *
4561   * For backward compatibility with WordPress 2.3 calling method: If the $file
4562   * (first) parameter does not correspond to a registered CSS file, we assume
4563   * $file is a file relative to wp-admin/ without its ".css" extension. A
4564   * stylesheet link to that generated URL is printed.
4565   *
4566   * @since 2.3.0
4567   *
4568   * @param string $file       Optional. Style handle name or file name (without ".css" extension) relative
4569   *                           to wp-admin/. Defaults to 'wp-admin'.
4570   * @param bool   $force_echo Optional. Force the stylesheet link to be printed rather than enqueued.
4571   */
4572  function wp_admin_css( $file = 'wp-admin', $force_echo = false ) {
4573      // For backward compatibility.
4574      $handle = 0 === strpos( $file, 'css/' ) ? substr( $file, 4 ) : $file;
4575  
4576      if ( wp_styles()->query( $handle ) ) {
4577          if ( $force_echo || did_action( 'wp_print_styles' ) ) {
4578              // We already printed the style queue. Print this one immediately.
4579              wp_print_styles( $handle );
4580          } else {
4581              // Add to style queue.
4582              wp_enqueue_style( $handle );
4583          }
4584          return;
4585      }
4586  
4587      $stylesheet_link = sprintf(
4588          "<link rel='stylesheet' href='%s' type='text/css' />\n",
4589          esc_url( wp_admin_css_uri( $file ) )
4590      );
4591  
4592      /**
4593       * Filters the stylesheet link to the specified CSS file.
4594       *
4595       * If the site is set to display right-to-left, the RTL stylesheet link
4596       * will be used instead.
4597       *
4598       * @since 2.3.0
4599       * @param string $stylesheet_link HTML link element for the stylesheet.
4600       * @param string $file            Style handle name or filename (without ".css" extension)
4601       *                                relative to wp-admin/. Defaults to 'wp-admin'.
4602       */
4603      echo apply_filters( 'wp_admin_css', $stylesheet_link, $file );
4604  
4605      if ( function_exists( 'is_rtl' ) && is_rtl() ) {
4606          $rtl_stylesheet_link = sprintf(
4607              "<link rel='stylesheet' href='%s' type='text/css' />\n",
4608              esc_url( wp_admin_css_uri( "$file-rtl" ) )
4609          );
4610  
4611          /** This filter is documented in wp-includes/general-template.php */
4612          echo apply_filters( 'wp_admin_css', $rtl_stylesheet_link, "$file-rtl" );
4613      }
4614  }
4615  
4616  /**
4617   * Enqueues the default ThickBox js and css.
4618   *
4619   * If any of the settings need to be changed, this can be done with another js
4620   * file similar to media-upload.js. That file should
4621   * require array('thickbox') to ensure it is loaded after.
4622   *
4623   * @since 2.5.0
4624   */
4625  function add_thickbox() {
4626      wp_enqueue_script( 'thickbox' );
4627      wp_enqueue_style( 'thickbox' );
4628  
4629      if ( is_network_admin() ) {
4630          add_action( 'admin_head', '_thickbox_path_admin_subfolder' );
4631      }
4632  }
4633  
4634  /**
4635   * Displays the XHTML generator that is generated on the wp_head hook.
4636   *
4637   * See {@see 'wp_head'}.
4638   *
4639   * @since 2.5.0
4640   */
4641  function wp_generator() {
4642      /**
4643       * Filters the output of the XHTML generator tag.
4644       *
4645       * @since 2.5.0
4646       *
4647       * @param string $generator_type The XHTML generator.
4648       */
4649      the_generator( apply_filters( 'wp_generator_type', 'xhtml' ) );
4650  }
4651  
4652  /**
4653   * Display the generator XML or Comment for RSS, ATOM, etc.
4654   *
4655   * Returns the correct generator type for the requested output format. Allows
4656   * for a plugin to filter generators overall the {@see 'the_generator'} filter.
4657   *
4658   * @since 2.5.0
4659   *
4660   * @param string $type The type of generator to output - (html|xhtml|atom|rss2|rdf|comment|export).
4661   */
4662  function the_generator( $type ) {
4663      /**
4664       * Filters the output of the XHTML generator tag for display.
4665       *
4666       * @since 2.5.0
4667       *
4668       * @param string $generator_type The generator output.
4669       * @param string $type           The type of generator to output. Accepts 'html',
4670       *                               'xhtml', 'atom', 'rss2', 'rdf', 'comment', 'export'.
4671       */
4672      echo apply_filters( 'the_generator', get_the_generator( $type ), $type ) . "\n";
4673  }
4674  
4675  /**
4676   * Creates the generator XML or Comment for RSS, ATOM, etc.
4677   *
4678   * Returns the correct generator type for the requested output format. Allows
4679   * for a plugin to filter generators on an individual basis using the
4680   * {@see 'get_the_generator_$type'} filter.
4681   *
4682   * @since 2.5.0
4683   *
4684   * @param string $type The type of generator to return - (html|xhtml|atom|rss2|rdf|comment|export).
4685   * @return string|void The HTML content for the generator.
4686   */
4687  function get_the_generator( $type = '' ) {
4688      if ( empty( $type ) ) {
4689  
4690          $current_filter = current_filter();
4691          if ( empty( $current_filter ) ) {
4692              return;
4693          }
4694  
4695          switch ( $current_filter ) {
4696              case 'rss2_head':
4697              case 'commentsrss2_head':
4698                  $type = 'rss2';
4699                  break;
4700              case 'rss_head':
4701              case 'opml_head':
4702                  $type = 'comment';
4703                  break;
4704              case 'rdf_header':
4705                  $type = 'rdf';
4706                  break;
4707              case 'atom_head':
4708              case 'comments_atom_head':
4709              case 'app_head':
4710                  $type = 'atom';
4711                  break;
4712          }
4713      }
4714  
4715      switch ( $type ) {
4716          case 'html':
4717              $gen = '<meta name="generator" content="WordPress ' . esc_attr( get_bloginfo( 'version' ) ) . '">';
4718              break;
4719          case 'xhtml':
4720              $gen = '<meta name="generator" content="WordPress ' . esc_attr( get_bloginfo( 'version' ) ) . '" />';
4721              break;
4722          case 'atom':
4723              $gen = '<generator uri="https://wordpress.org/" version="' . esc_attr( get_bloginfo_rss( 'version' ) ) . '">WordPress</generator>';
4724              break;
4725          case 'rss2':
4726              $gen = '<generator>' . esc_url_raw( 'https://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) ) . '</generator>';
4727              break;
4728          case 'rdf':
4729              $gen = '<admin:generatorAgent rdf:resource="' . esc_url_raw( 'https://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) ) . '" />';
4730              break;
4731          case 'comment':
4732              $gen = '<!-- generator="WordPress/' . esc_attr( get_bloginfo( 'version' ) ) . '" -->';
4733              break;
4734          case 'export':
4735              $gen = '<!-- generator="WordPress/' . esc_attr( get_bloginfo_rss( 'version' ) ) . '" created="' . gmdate( 'Y-m-d H:i' ) . '" -->';
4736              break;
4737      }
4738  
4739      /**
4740       * Filters the HTML for the retrieved generator type.
4741       *
4742       * The dynamic portion of the hook name, `$type`, refers to the generator type.
4743       *
4744       * Possible hook names include:
4745       *
4746       *  - `get_the_generator_atom`
4747       *  - `get_the_generator_comment`
4748       *  - `get_the_generator_export`
4749       *  - `get_the_generator_html`
4750       *  - `get_the_generator_rdf`
4751       *  - `get_the_generator_rss2`
4752       *  - `get_the_generator_xhtml`
4753       *
4754       * @since 2.5.0
4755       *
4756       * @param string $gen  The HTML markup output to wp_head().
4757       * @param string $type The type of generator. Accepts 'html', 'xhtml', 'atom',
4758       *                     'rss2', 'rdf', 'comment', 'export'.
4759       */
4760      return apply_filters( "get_the_generator_{$type}", $gen, $type );
4761  }
4762  
4763  /**
4764   * Outputs the HTML checked attribute.
4765   *
4766   * Compares the first two arguments and if identical marks as checked
4767   *
4768   * @since 1.0.0
4769   *
4770   * @param mixed $checked One of the values to compare
4771   * @param mixed $current (true) The other value to compare if not just true
4772   * @param bool  $echo    Whether to echo or just return the string
4773   * @return string HTML attribute or empty string
4774   */
4775  function checked( $checked, $current = true, $echo = true ) {
4776      return __checked_selected_helper( $checked, $current, $echo, 'checked' );
4777  }
4778  
4779  /**
4780   * Outputs the HTML selected attribute.
4781   *
4782   * Compares the first two arguments and if identical marks as selected
4783   *
4784   * @since 1.0.0
4785   *
4786   * @param mixed $selected One of the values to compare
4787   * @param mixed $current  (true) The other value to compare if not just true
4788   * @param bool  $echo     Whether to echo or just return the string
4789   * @return string HTML attribute or empty string
4790   */
4791  function selected( $selected, $current = true, $echo = true ) {
4792      return __checked_selected_helper( $selected, $current, $echo, 'selected' );
4793  }
4794  
4795  /**
4796   * Outputs the HTML disabled attribute.
4797   *
4798   * Compares the first two arguments and if identical marks as disabled
4799   *
4800   * @since 3.0.0
4801   *
4802   * @param mixed $disabled One of the values to compare
4803   * @param mixed $current  (true) The other value to compare if not just true
4804   * @param bool  $echo     Whether to echo or just return the string
4805   * @return string HTML attribute or empty string
4806   */
4807  function disabled( $disabled, $current = true, $echo = true ) {
4808      return __checked_selected_helper( $disabled, $current, $echo, 'disabled' );
4809  }
4810  
4811  /**
4812   * Outputs the HTML readonly attribute.
4813   *
4814   * Compares the first two arguments and if identical marks as readonly
4815   *
4816   * @since 4.9.0
4817   *
4818   * @param mixed $readonly One of the values to compare
4819   * @param mixed $current  (true) The other value to compare if not just true
4820   * @param bool  $echo     Whether to echo or just return the string
4821   * @return string HTML attribute or empty string
4822   */
4823  function readonly( $readonly, $current = true, $echo = true ) {
4824      return __checked_selected_helper( $readonly, $current, $echo, 'readonly' );
4825  }
4826  
4827  /**
4828   * Private helper function for checked, selected, disabled and readonly.
4829   *
4830   * Compares the first two arguments and if identical marks as $type
4831   *
4832   * @since 2.8.0
4833   * @access private
4834   *
4835   * @param mixed  $helper  One of the values to compare
4836   * @param mixed  $current (true) The other value to compare if not just true
4837   * @param bool   $echo    Whether to echo or just return the string
4838   * @param string $type    The type of checked|selected|disabled|readonly we are doing
4839   * @return string HTML attribute or empty string
4840   */
4841  function __checked_selected_helper( $helper, $current, $echo, $type ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.FunctionDoubleUnderscore
4842      if ( (string) $helper === (string) $current ) {
4843          $result = " $type='$type'";
4844      } else {
4845          $result = '';
4846      }
4847  
4848      if ( $echo ) {
4849          echo $result;
4850      }
4851  
4852      return $result;
4853  }
4854  
4855  /**
4856   * Default settings for heartbeat
4857   *
4858   * Outputs the nonce used in the heartbeat XHR
4859   *
4860   * @since 3.6.0
4861   *
4862   * @param array $settings
4863   * @return array Heartbeat settings.
4864   */
4865  function wp_heartbeat_settings( $settings ) {
4866      if ( ! is_admin() ) {
4867          $settings['ajaxurl'] = admin_url( 'admin-ajax.php', 'relative' );
4868      }
4869  
4870      if ( is_user_logged_in() ) {
4871          $settings['nonce'] = wp_create_nonce( 'heartbeat-nonce' );
4872      }
4873  
4874      return $settings;
4875  }


Generated: Mon Aug 2 01:00:04 2021 Cross-referenced by PHPXref 0.7.1