[ Index ]

PHP Cross Reference of WordPress

title

Body

[close]

/wp-includes/ -> pluggable.php (source)

   1  <?php
   2  /**
   3   * These functions can be replaced via plugins. If plugins do not redefine these
   4   * functions, then these will be used instead.
   5   *
   6   * @package WordPress
   7   */
   8  
   9  if ( ! function_exists( 'wp_set_current_user' ) ) :
  10      /**
  11       * Changes the current user by ID or name.
  12       *
  13       * Set $id to null and specify a name if you do not know a user's ID.
  14       *
  15       * Some WordPress functionality is based on the current user and not based on
  16       * the signed in user. Therefore, it opens the ability to edit and perform
  17       * actions on users who aren't signed in.
  18       *
  19       * @since 2.0.3
  20       *
  21       * @global WP_User $current_user The current user object which holds the user data.
  22       *
  23       * @param int    $id   User ID
  24       * @param string $name User's username
  25       * @return WP_User Current user User object
  26       */
  27  	function wp_set_current_user( $id, $name = '' ) {
  28          global $current_user;
  29  
  30          // If `$id` matches the current user, there is nothing to do.
  31          if ( isset( $current_user )
  32          && ( $current_user instanceof WP_User )
  33          && ( $id == $current_user->ID )
  34          && ( null !== $id )
  35          ) {
  36              return $current_user;
  37          }
  38  
  39          $current_user = new WP_User( $id, $name );
  40  
  41          setup_userdata( $current_user->ID );
  42  
  43          /**
  44           * Fires after the current user is set.
  45           *
  46           * @since 2.0.1
  47           */
  48          do_action( 'set_current_user' );
  49  
  50          return $current_user;
  51      }
  52  endif;
  53  
  54  if ( ! function_exists( 'wp_get_current_user' ) ) :
  55      /**
  56       * Retrieve the current user object.
  57       *
  58       * Will set the current user, if the current user is not set. The current user
  59       * will be set to the logged-in person. If no user is logged-in, then it will
  60       * set the current user to 0, which is invalid and won't have any permissions.
  61       *
  62       * @since 2.0.3
  63       *
  64       * @see _wp_get_current_user()
  65       * @global WP_User $current_user Checks if the current user is set.
  66       *
  67       * @return WP_User Current WP_User instance.
  68       */
  69  	function wp_get_current_user() {
  70          return _wp_get_current_user();
  71      }
  72  endif;
  73  
  74  if ( ! function_exists( 'get_userdata' ) ) :
  75      /**
  76       * Retrieve user info by user ID.
  77       *
  78       * @since 0.71
  79       *
  80       * @param int $user_id User ID
  81       * @return WP_User|false WP_User object on success, false on failure.
  82       */
  83  	function get_userdata( $user_id ) {
  84          return get_user_by( 'id', $user_id );
  85      }
  86  endif;
  87  
  88  if ( ! function_exists( 'get_user_by' ) ) :
  89      /**
  90       * Retrieve user info by a given field
  91       *
  92       * @since 2.8.0
  93       * @since 4.4.0 Added 'ID' as an alias of 'id' for the `$field` parameter.
  94       * @since 5.8.0 Returns the global `$current_user` if it's the user being fetched.
  95       *
  96       * @global WP_User $current_user The current user object which holds the user data.
  97       *
  98       * @param string     $field The field to retrieve the user with. id | ID | slug | email | login.
  99       * @param int|string $value A value for $field. A user ID, slug, email address, or login name.
 100       * @return WP_User|false WP_User object on success, false on failure.
 101       */
 102  	function get_user_by( $field, $value ) {
 103          global $current_user;
 104  
 105          $userdata = WP_User::get_data_by( $field, $value );
 106  
 107          if ( ! $userdata ) {
 108              return false;
 109          }
 110  
 111          if ( $current_user instanceof WP_User && $current_user->ID === (int) $userdata->ID ) {
 112              return $current_user;
 113          }
 114  
 115          $user = new WP_User;
 116          $user->init( $userdata );
 117  
 118          return $user;
 119      }
 120  endif;
 121  
 122  if ( ! function_exists( 'cache_users' ) ) :
 123      /**
 124       * Retrieve info for user lists to prevent multiple queries by get_userdata()
 125       *
 126       * @since 3.0.0
 127       *
 128       * @global wpdb $wpdb WordPress database abstraction object.
 129       *
 130       * @param array $user_ids User ID numbers list
 131       */
 132  	function cache_users( $user_ids ) {
 133          global $wpdb;
 134  
 135          $clean = _get_non_cached_ids( $user_ids, 'users' );
 136  
 137          if ( empty( $clean ) ) {
 138              return;
 139          }
 140  
 141          $list = implode( ',', $clean );
 142  
 143          $users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );
 144  
 145          $ids = array();
 146          foreach ( $users as $user ) {
 147              update_user_caches( $user );
 148              $ids[] = $user->ID;
 149          }
 150          update_meta_cache( 'user', $ids );
 151      }
 152  endif;
 153  
 154  if ( ! function_exists( 'wp_mail' ) ) :
 155      /**
 156       * Sends an email, similar to PHP's mail function.
 157       *
 158       * A true return value does not automatically mean that the user received the
 159       * email successfully. It just only means that the method used was able to
 160       * process the request without any errors.
 161       *
 162       * The default content type is `text/plain` which does not allow using HTML.
 163       * However, you can set the content type of the email by using the
 164       * {@see 'wp_mail_content_type'} filter.
 165       *
 166       * The default charset is based on the charset used on the blog. The charset can
 167       * be set using the {@see 'wp_mail_charset'} filter.
 168       *
 169       * @since 1.2.1
 170       * @since 5.5.0 is_email() is used for email validation,
 171       *              instead of PHPMailer's default validator.
 172       *
 173       * @global PHPMailer\PHPMailer\PHPMailer $phpmailer
 174       *
 175       * @param string|string[] $to          Array or comma-separated list of email addresses to send message.
 176       * @param string          $subject     Email subject.
 177       * @param string          $message     Message contents.
 178       * @param string|string[] $headers     Optional. Additional headers.
 179       * @param string|string[] $attachments Optional. Paths to files to attach.
 180       * @return bool Whether the email was sent successfully.
 181       */
 182  	function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() ) {
 183          // Compact the input, apply the filters, and extract them back out.
 184  
 185          /**
 186           * Filters the wp_mail() arguments.
 187           *
 188           * @since 2.2.0
 189           *
 190           * @param array $args {
 191           *     Array of the `wp_mail()` arguments.
 192           *
 193           *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
 194           *     @type string          $subject     Email subject.
 195           *     @type string          $message     Message contents.
 196           *     @type string|string[] $headers     Additional headers.
 197           *     @type string|string[] $attachments Paths to files to attach.
 198           * }
 199           */
 200          $atts = apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) );
 201  
 202          /**
 203           * Filters whether to preempt sending an email.
 204           *
 205           * Returning a non-null value will short-circuit {@see wp_mail()}, returning
 206           * that value instead. A boolean return value should be used to indicate whether
 207           * the email was successfully sent.
 208           *
 209           * @since 5.7.0
 210           *
 211           * @param null|bool $return Short-circuit return value.
 212           * @param array     $atts {
 213           *     Array of the `wp_mail()` arguments.
 214           *
 215           *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
 216           *     @type string          $subject     Email subject.
 217           *     @type string          $message     Message contents.
 218           *     @type string|string[] $headers     Additional headers.
 219           *     @type string|string[] $attachments Paths to files to attach.
 220           * }
 221           */
 222          $pre_wp_mail = apply_filters( 'pre_wp_mail', null, $atts );
 223  
 224          if ( null !== $pre_wp_mail ) {
 225              return $pre_wp_mail;
 226          }
 227  
 228          if ( isset( $atts['to'] ) ) {
 229              $to = $atts['to'];
 230          }
 231  
 232          if ( ! is_array( $to ) ) {
 233              $to = explode( ',', $to );
 234          }
 235  
 236          if ( isset( $atts['subject'] ) ) {
 237              $subject = $atts['subject'];
 238          }
 239  
 240          if ( isset( $atts['message'] ) ) {
 241              $message = $atts['message'];
 242          }
 243  
 244          if ( isset( $atts['headers'] ) ) {
 245              $headers = $atts['headers'];
 246          }
 247  
 248          if ( isset( $atts['attachments'] ) ) {
 249              $attachments = $atts['attachments'];
 250          }
 251  
 252          if ( ! is_array( $attachments ) ) {
 253              $attachments = explode( "\n", str_replace( "\r\n", "\n", $attachments ) );
 254          }
 255          global $phpmailer;
 256  
 257          // (Re)create it, if it's gone missing.
 258          if ( ! ( $phpmailer instanceof PHPMailer\PHPMailer\PHPMailer ) ) {
 259              require_once  ABSPATH . WPINC . '/PHPMailer/PHPMailer.php';
 260              require_once  ABSPATH . WPINC . '/PHPMailer/SMTP.php';
 261              require_once  ABSPATH . WPINC . '/PHPMailer/Exception.php';
 262              $phpmailer = new PHPMailer\PHPMailer\PHPMailer( true );
 263  
 264              $phpmailer::$validator = static function ( $email ) {
 265                  return (bool) is_email( $email );
 266              };
 267          }
 268  
 269          // Headers.
 270          $cc       = array();
 271          $bcc      = array();
 272          $reply_to = array();
 273  
 274          if ( empty( $headers ) ) {
 275              $headers = array();
 276          } else {
 277              if ( ! is_array( $headers ) ) {
 278                  // Explode the headers out, so this function can take
 279                  // both string headers and an array of headers.
 280                  $tempheaders = explode( "\n", str_replace( "\r\n", "\n", $headers ) );
 281              } else {
 282                  $tempheaders = $headers;
 283              }
 284              $headers = array();
 285  
 286              // If it's actually got contents.
 287              if ( ! empty( $tempheaders ) ) {
 288                  // Iterate through the raw headers.
 289                  foreach ( (array) $tempheaders as $header ) {
 290                      if ( strpos( $header, ':' ) === false ) {
 291                          if ( false !== stripos( $header, 'boundary=' ) ) {
 292                              $parts    = preg_split( '/boundary=/i', trim( $header ) );
 293                              $boundary = trim( str_replace( array( "'", '"' ), '', $parts[1] ) );
 294                          }
 295                          continue;
 296                      }
 297                      // Explode them out.
 298                      list( $name, $content ) = explode( ':', trim( $header ), 2 );
 299  
 300                      // Cleanup crew.
 301                      $name    = trim( $name );
 302                      $content = trim( $content );
 303  
 304                      switch ( strtolower( $name ) ) {
 305                          // Mainly for legacy -- process a "From:" header if it's there.
 306                          case 'from':
 307                              $bracket_pos = strpos( $content, '<' );
 308                              if ( false !== $bracket_pos ) {
 309                                  // Text before the bracketed email is the "From" name.
 310                                  if ( $bracket_pos > 0 ) {
 311                                      $from_name = substr( $content, 0, $bracket_pos - 1 );
 312                                      $from_name = str_replace( '"', '', $from_name );
 313                                      $from_name = trim( $from_name );
 314                                  }
 315  
 316                                  $from_email = substr( $content, $bracket_pos + 1 );
 317                                  $from_email = str_replace( '>', '', $from_email );
 318                                  $from_email = trim( $from_email );
 319  
 320                                  // Avoid setting an empty $from_email.
 321                              } elseif ( '' !== trim( $content ) ) {
 322                                  $from_email = trim( $content );
 323                              }
 324                              break;
 325                          case 'content-type':
 326                              if ( strpos( $content, ';' ) !== false ) {
 327                                  list( $type, $charset_content ) = explode( ';', $content );
 328                                  $content_type                   = trim( $type );
 329                                  if ( false !== stripos( $charset_content, 'charset=' ) ) {
 330                                      $charset = trim( str_replace( array( 'charset=', '"' ), '', $charset_content ) );
 331                                  } elseif ( false !== stripos( $charset_content, 'boundary=' ) ) {
 332                                      $boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset_content ) );
 333                                      $charset  = '';
 334                                  }
 335  
 336                                  // Avoid setting an empty $content_type.
 337                              } elseif ( '' !== trim( $content ) ) {
 338                                  $content_type = trim( $content );
 339                              }
 340                              break;
 341                          case 'cc':
 342                              $cc = array_merge( (array) $cc, explode( ',', $content ) );
 343                              break;
 344                          case 'bcc':
 345                              $bcc = array_merge( (array) $bcc, explode( ',', $content ) );
 346                              break;
 347                          case 'reply-to':
 348                              $reply_to = array_merge( (array) $reply_to, explode( ',', $content ) );
 349                              break;
 350                          default:
 351                              // Add it to our grand headers array.
 352                              $headers[ trim( $name ) ] = trim( $content );
 353                              break;
 354                      }
 355                  }
 356              }
 357          }
 358  
 359          // Empty out the values that may be set.
 360          $phpmailer->clearAllRecipients();
 361          $phpmailer->clearAttachments();
 362          $phpmailer->clearCustomHeaders();
 363          $phpmailer->clearReplyTos();
 364  
 365          // Set "From" name and email.
 366  
 367          // If we don't have a name from the input headers.
 368          if ( ! isset( $from_name ) ) {
 369              $from_name = 'WordPress';
 370          }
 371  
 372          /*
 373           * If we don't have an email from the input headers, default to wordpress@$sitename
 374           * Some hosts will block outgoing mail from this address if it doesn't exist,
 375           * but there's no easy alternative. Defaulting to admin_email might appear to be
 376           * another option, but some hosts may refuse to relay mail from an unknown domain.
 377           * See https://core.trac.wordpress.org/ticket/5007.
 378           */
 379          if ( ! isset( $from_email ) ) {
 380              // Get the site domain and get rid of www.
 381              $sitename = wp_parse_url( network_home_url(), PHP_URL_HOST );
 382              if ( 'www.' === substr( $sitename, 0, 4 ) ) {
 383                  $sitename = substr( $sitename, 4 );
 384              }
 385  
 386              $from_email = 'wordpress@' . $sitename;
 387          }
 388  
 389          /**
 390           * Filters the email address to send from.
 391           *
 392           * @since 2.2.0
 393           *
 394           * @param string $from_email Email address to send from.
 395           */
 396          $from_email = apply_filters( 'wp_mail_from', $from_email );
 397  
 398          /**
 399           * Filters the name to associate with the "from" email address.
 400           *
 401           * @since 2.3.0
 402           *
 403           * @param string $from_name Name associated with the "from" email address.
 404           */
 405          $from_name = apply_filters( 'wp_mail_from_name', $from_name );
 406  
 407          try {
 408              $phpmailer->setFrom( $from_email, $from_name, false );
 409          } catch ( PHPMailer\PHPMailer\Exception $e ) {
 410              $mail_error_data                             = compact( 'to', 'subject', 'message', 'headers', 'attachments' );
 411              $mail_error_data['phpmailer_exception_code'] = $e->getCode();
 412  
 413              /** This filter is documented in wp-includes/pluggable.php */
 414              do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) );
 415  
 416              return false;
 417          }
 418  
 419          // Set mail's subject and body.
 420          $phpmailer->Subject = $subject;
 421          $phpmailer->Body    = $message;
 422  
 423          // Set destination addresses, using appropriate methods for handling addresses.
 424          $address_headers = compact( 'to', 'cc', 'bcc', 'reply_to' );
 425  
 426          foreach ( $address_headers as $address_header => $addresses ) {
 427              if ( empty( $addresses ) ) {
 428                  continue;
 429              }
 430  
 431              foreach ( (array) $addresses as $address ) {
 432                  try {
 433                      // Break $recipient into name and address parts if in the format "Foo <bar@baz.com>".
 434                      $recipient_name = '';
 435  
 436                      if ( preg_match( '/(.*)<(.+)>/', $address, $matches ) ) {
 437                          if ( count( $matches ) == 3 ) {
 438                              $recipient_name = $matches[1];
 439                              $address        = $matches[2];
 440                          }
 441                      }
 442  
 443                      switch ( $address_header ) {
 444                          case 'to':
 445                              $phpmailer->addAddress( $address, $recipient_name );
 446                              break;
 447                          case 'cc':
 448                              $phpmailer->addCc( $address, $recipient_name );
 449                              break;
 450                          case 'bcc':
 451                              $phpmailer->addBcc( $address, $recipient_name );
 452                              break;
 453                          case 'reply_to':
 454                              $phpmailer->addReplyTo( $address, $recipient_name );
 455                              break;
 456                      }
 457                  } catch ( PHPMailer\PHPMailer\Exception $e ) {
 458                      continue;
 459                  }
 460              }
 461          }
 462  
 463          // Set to use PHP's mail().
 464          $phpmailer->isMail();
 465  
 466          // Set Content-Type and charset.
 467  
 468          // If we don't have a content-type from the input headers.
 469          if ( ! isset( $content_type ) ) {
 470              $content_type = 'text/plain';
 471          }
 472  
 473          /**
 474           * Filters the wp_mail() content type.
 475           *
 476           * @since 2.3.0
 477           *
 478           * @param string $content_type Default wp_mail() content type.
 479           */
 480          $content_type = apply_filters( 'wp_mail_content_type', $content_type );
 481  
 482          $phpmailer->ContentType = $content_type;
 483  
 484          // Set whether it's plaintext, depending on $content_type.
 485          if ( 'text/html' === $content_type ) {
 486              $phpmailer->isHTML( true );
 487          }
 488  
 489          // If we don't have a charset from the input headers.
 490          if ( ! isset( $charset ) ) {
 491              $charset = get_bloginfo( 'charset' );
 492          }
 493  
 494          /**
 495           * Filters the default wp_mail() charset.
 496           *
 497           * @since 2.3.0
 498           *
 499           * @param string $charset Default email charset.
 500           */
 501          $phpmailer->CharSet = apply_filters( 'wp_mail_charset', $charset );
 502  
 503          // Set custom headers.
 504          if ( ! empty( $headers ) ) {
 505              foreach ( (array) $headers as $name => $content ) {
 506                  // Only add custom headers not added automatically by PHPMailer.
 507                  if ( ! in_array( $name, array( 'MIME-Version', 'X-Mailer' ), true ) ) {
 508                      try {
 509                          $phpmailer->addCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) );
 510                      } catch ( PHPMailer\PHPMailer\Exception $e ) {
 511                          continue;
 512                      }
 513                  }
 514              }
 515  
 516              if ( false !== stripos( $content_type, 'multipart' ) && ! empty( $boundary ) ) {
 517                  $phpmailer->addCustomHeader( sprintf( 'Content-Type: %s; boundary="%s"', $content_type, $boundary ) );
 518              }
 519          }
 520  
 521          if ( ! empty( $attachments ) ) {
 522              foreach ( $attachments as $attachment ) {
 523                  try {
 524                      $phpmailer->addAttachment( $attachment );
 525                  } catch ( PHPMailer\PHPMailer\Exception $e ) {
 526                      continue;
 527                  }
 528              }
 529          }
 530  
 531          /**
 532           * Fires after PHPMailer is initialized.
 533           *
 534           * @since 2.2.0
 535           *
 536           * @param PHPMailer $phpmailer The PHPMailer instance (passed by reference).
 537           */
 538          do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) );
 539  
 540          // Send!
 541          try {
 542              return $phpmailer->send();
 543          } catch ( PHPMailer\PHPMailer\Exception $e ) {
 544  
 545              $mail_error_data                             = compact( 'to', 'subject', 'message', 'headers', 'attachments' );
 546              $mail_error_data['phpmailer_exception_code'] = $e->getCode();
 547  
 548              /**
 549               * Fires after a PHPMailer\PHPMailer\Exception is caught.
 550               *
 551               * @since 4.4.0
 552               *
 553               * @param WP_Error $error A WP_Error object with the PHPMailer\PHPMailer\Exception message, and an array
 554               *                        containing the mail recipient, subject, message, headers, and attachments.
 555               */
 556              do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) );
 557  
 558              return false;
 559          }
 560      }
 561  endif;
 562  
 563  if ( ! function_exists( 'wp_authenticate' ) ) :
 564      /**
 565       * Authenticate a user, confirming the login credentials are valid.
 566       *
 567       * @since 2.5.0
 568       * @since 4.5.0 `$username` now accepts an email address.
 569       *
 570       * @param string $username User's username or email address.
 571       * @param string $password User's password.
 572       * @return WP_User|WP_Error WP_User object if the credentials are valid,
 573       *                          otherwise WP_Error.
 574       */
 575  	function wp_authenticate( $username, $password ) {
 576          $username = sanitize_user( $username );
 577          $password = trim( $password );
 578  
 579          /**
 580           * Filters whether a set of user login credentials are valid.
 581           *
 582           * A WP_User object is returned if the credentials authenticate a user.
 583           * WP_Error or null otherwise.
 584           *
 585           * @since 2.8.0
 586           * @since 4.5.0 `$username` now accepts an email address.
 587           *
 588           * @param null|WP_User|WP_Error $user     WP_User if the user is authenticated.
 589           *                                        WP_Error or null otherwise.
 590           * @param string                $username Username or email address.
 591           * @param string                $password User password
 592           */
 593          $user = apply_filters( 'authenticate', null, $username, $password );
 594  
 595          if ( null == $user ) {
 596              // TODO: What should the error message be? (Or would these even happen?)
 597              // Only needed if all authentication handlers fail to return anything.
 598              $user = new WP_Error( 'authentication_failed', __( '<strong>Error</strong>: Invalid username, email address or incorrect password.' ) );
 599          }
 600  
 601          $ignore_codes = array( 'empty_username', 'empty_password' );
 602  
 603          if ( is_wp_error( $user ) && ! in_array( $user->get_error_code(), $ignore_codes, true ) ) {
 604              $error = $user;
 605  
 606              /**
 607               * Fires after a user login has failed.
 608               *
 609               * @since 2.5.0
 610               * @since 4.5.0 The value of `$username` can now be an email address.
 611               * @since 5.4.0 The `$error` parameter was added.
 612               *
 613               * @param string   $username Username or email address.
 614               * @param WP_Error $error    A WP_Error object with the authentication failure details.
 615               */
 616              do_action( 'wp_login_failed', $username, $error );
 617          }
 618  
 619          return $user;
 620      }
 621  endif;
 622  
 623  if ( ! function_exists( 'wp_logout' ) ) :
 624      /**
 625       * Log the current user out.
 626       *
 627       * @since 2.5.0
 628       */
 629  	function wp_logout() {
 630          $user_id = get_current_user_id();
 631  
 632          wp_destroy_current_session();
 633          wp_clear_auth_cookie();
 634          wp_set_current_user( 0 );
 635  
 636          /**
 637           * Fires after a user is logged out.
 638           *
 639           * @since 1.5.0
 640           * @since 5.5.0 Added the `$user_id` parameter.
 641           *
 642           * @param int $user_id ID of the user that was logged out.
 643           */
 644          do_action( 'wp_logout', $user_id );
 645      }
 646  endif;
 647  
 648  if ( ! function_exists( 'wp_validate_auth_cookie' ) ) :
 649      /**
 650       * Validates authentication cookie.
 651       *
 652       * The checks include making sure that the authentication cookie is set and
 653       * pulling in the contents (if $cookie is not used).
 654       *
 655       * Makes sure the cookie is not expired. Verifies the hash in cookie is what is
 656       * should be and compares the two.
 657       *
 658       * @since 2.5.0
 659       *
 660       * @global int $login_grace_period
 661       *
 662       * @param string $cookie Optional. If used, will validate contents instead of cookie's.
 663       * @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
 664       * @return int|false User ID if valid cookie, false if invalid.
 665       */
 666  	function wp_validate_auth_cookie( $cookie = '', $scheme = '' ) {
 667          $cookie_elements = wp_parse_auth_cookie( $cookie, $scheme );
 668          if ( ! $cookie_elements ) {
 669              /**
 670               * Fires if an authentication cookie is malformed.
 671               *
 672               * @since 2.7.0
 673               *
 674               * @param string $cookie Malformed auth cookie.
 675               * @param string $scheme Authentication scheme. Values include 'auth', 'secure_auth',
 676               *                       or 'logged_in'.
 677               */
 678              do_action( 'auth_cookie_malformed', $cookie, $scheme );
 679              return false;
 680          }
 681  
 682          $scheme     = $cookie_elements['scheme'];
 683          $username   = $cookie_elements['username'];
 684          $hmac       = $cookie_elements['hmac'];
 685          $token      = $cookie_elements['token'];
 686          $expired    = $cookie_elements['expiration'];
 687          $expiration = $cookie_elements['expiration'];
 688  
 689          // Allow a grace period for POST and Ajax requests.
 690          if ( wp_doing_ajax() || 'POST' === $_SERVER['REQUEST_METHOD'] ) {
 691              $expired += HOUR_IN_SECONDS;
 692          }
 693  
 694          // Quick check to see if an honest cookie has expired.
 695          if ( $expired < time() ) {
 696              /**
 697               * Fires once an authentication cookie has expired.
 698               *
 699               * @since 2.7.0
 700               *
 701               * @param string[] $cookie_elements An array of data for the authentication cookie.
 702               */
 703              do_action( 'auth_cookie_expired', $cookie_elements );
 704              return false;
 705          }
 706  
 707          $user = get_user_by( 'login', $username );
 708          if ( ! $user ) {
 709              /**
 710               * Fires if a bad username is entered in the user authentication process.
 711               *
 712               * @since 2.7.0
 713               *
 714               * @param string[] $cookie_elements An array of data for the authentication cookie.
 715               */
 716              do_action( 'auth_cookie_bad_username', $cookie_elements );
 717              return false;
 718          }
 719  
 720          $pass_frag = substr( $user->user_pass, 8, 4 );
 721  
 722          $key = wp_hash( $username . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );
 723  
 724          // If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
 725          $algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
 726          $hash = hash_hmac( $algo, $username . '|' . $expiration . '|' . $token, $key );
 727  
 728          if ( ! hash_equals( $hash, $hmac ) ) {
 729              /**
 730               * Fires if a bad authentication cookie hash is encountered.
 731               *
 732               * @since 2.7.0
 733               *
 734               * @param string[] $cookie_elements An array of data for the authentication cookie.
 735               */
 736              do_action( 'auth_cookie_bad_hash', $cookie_elements );
 737              return false;
 738          }
 739  
 740          $manager = WP_Session_Tokens::get_instance( $user->ID );
 741          if ( ! $manager->verify( $token ) ) {
 742              /**
 743               * Fires if a bad session token is encountered.
 744               *
 745               * @since 4.0.0
 746               *
 747               * @param string[] $cookie_elements An array of data for the authentication cookie.
 748               */
 749              do_action( 'auth_cookie_bad_session_token', $cookie_elements );
 750              return false;
 751          }
 752  
 753          // Ajax/POST grace period set above.
 754          if ( $expiration < time() ) {
 755              $GLOBALS['login_grace_period'] = 1;
 756          }
 757  
 758          /**
 759           * Fires once an authentication cookie has been validated.
 760           *
 761           * @since 2.7.0
 762           *
 763           * @param string[] $cookie_elements An array of data for the authentication cookie.
 764           * @param WP_User  $user            User object.
 765           */
 766          do_action( 'auth_cookie_valid', $cookie_elements, $user );
 767  
 768          return $user->ID;
 769      }
 770  endif;
 771  
 772  if ( ! function_exists( 'wp_generate_auth_cookie' ) ) :
 773      /**
 774       * Generates authentication cookie contents.
 775       *
 776       * @since 2.5.0
 777       * @since 4.0.0 The `$token` parameter was added.
 778       *
 779       * @param int    $user_id    User ID.
 780       * @param int    $expiration The time the cookie expires as a UNIX timestamp.
 781       * @param string $scheme     Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
 782       *                           Default 'auth'.
 783       * @param string $token      User's session token to use for this cookie.
 784       * @return string Authentication cookie contents. Empty string if user does not exist.
 785       */
 786  	function wp_generate_auth_cookie( $user_id, $expiration, $scheme = 'auth', $token = '' ) {
 787          $user = get_userdata( $user_id );
 788          if ( ! $user ) {
 789              return '';
 790          }
 791  
 792          if ( ! $token ) {
 793              $manager = WP_Session_Tokens::get_instance( $user_id );
 794              $token   = $manager->create( $expiration );
 795          }
 796  
 797          $pass_frag = substr( $user->user_pass, 8, 4 );
 798  
 799          $key = wp_hash( $user->user_login . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );
 800  
 801          // If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
 802          $algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
 803          $hash = hash_hmac( $algo, $user->user_login . '|' . $expiration . '|' . $token, $key );
 804  
 805          $cookie = $user->user_login . '|' . $expiration . '|' . $token . '|' . $hash;
 806  
 807          /**
 808           * Filters the authentication cookie.
 809           *
 810           * @since 2.5.0
 811           * @since 4.0.0 The `$token` parameter was added.
 812           *
 813           * @param string $cookie     Authentication cookie.
 814           * @param int    $user_id    User ID.
 815           * @param int    $expiration The time the cookie expires as a UNIX timestamp.
 816           * @param string $scheme     Cookie scheme used. Accepts 'auth', 'secure_auth', or 'logged_in'.
 817           * @param string $token      User's session token used.
 818           */
 819          return apply_filters( 'auth_cookie', $cookie, $user_id, $expiration, $scheme, $token );
 820      }
 821  endif;
 822  
 823  if ( ! function_exists( 'wp_parse_auth_cookie' ) ) :
 824      /**
 825       * Parses a cookie into its components.
 826       *
 827       * @since 2.7.0
 828       *
 829       * @param string $cookie Authentication cookie.
 830       * @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
 831       * @return string[]|false Authentication cookie components.
 832       */
 833  	function wp_parse_auth_cookie( $cookie = '', $scheme = '' ) {
 834          if ( empty( $cookie ) ) {
 835              switch ( $scheme ) {
 836                  case 'auth':
 837                      $cookie_name = AUTH_COOKIE;
 838                      break;
 839                  case 'secure_auth':
 840                      $cookie_name = SECURE_AUTH_COOKIE;
 841                      break;
 842                  case 'logged_in':
 843                      $cookie_name = LOGGED_IN_COOKIE;
 844                      break;
 845                  default:
 846                      if ( is_ssl() ) {
 847                          $cookie_name = SECURE_AUTH_COOKIE;
 848                          $scheme      = 'secure_auth';
 849                      } else {
 850                          $cookie_name = AUTH_COOKIE;
 851                          $scheme      = 'auth';
 852                      }
 853              }
 854  
 855              if ( empty( $_COOKIE[ $cookie_name ] ) ) {
 856                  return false;
 857              }
 858              $cookie = $_COOKIE[ $cookie_name ];
 859          }
 860  
 861          $cookie_elements = explode( '|', $cookie );
 862          if ( count( $cookie_elements ) !== 4 ) {
 863              return false;
 864          }
 865  
 866          list( $username, $expiration, $token, $hmac ) = $cookie_elements;
 867  
 868          return compact( 'username', 'expiration', 'token', 'hmac', 'scheme' );
 869      }
 870  endif;
 871  
 872  if ( ! function_exists( 'wp_set_auth_cookie' ) ) :
 873      /**
 874       * Sets the authentication cookies based on user ID.
 875       *
 876       * The $remember parameter increases the time that the cookie will be kept. The
 877       * default the cookie is kept without remembering is two days. When $remember is
 878       * set, the cookies will be kept for 14 days or two weeks.
 879       *
 880       * @since 2.5.0
 881       * @since 4.3.0 Added the `$token` parameter.
 882       *
 883       * @param int         $user_id  User ID.
 884       * @param bool        $remember Whether to remember the user.
 885       * @param bool|string $secure   Whether the auth cookie should only be sent over HTTPS. Default is an empty
 886       *                              string which means the value of `is_ssl()` will be used.
 887       * @param string      $token    Optional. User's session token to use for this cookie.
 888       */
 889  	function wp_set_auth_cookie( $user_id, $remember = false, $secure = '', $token = '' ) {
 890          if ( $remember ) {
 891              /**
 892               * Filters the duration of the authentication cookie expiration period.
 893               *
 894               * @since 2.8.0
 895               *
 896               * @param int  $length   Duration of the expiration period in seconds.
 897               * @param int  $user_id  User ID.
 898               * @param bool $remember Whether to remember the user login. Default false.
 899               */
 900              $expiration = time() + apply_filters( 'auth_cookie_expiration', 14 * DAY_IN_SECONDS, $user_id, $remember );
 901  
 902              /*
 903               * Ensure the browser will continue to send the cookie after the expiration time is reached.
 904               * Needed for the login grace period in wp_validate_auth_cookie().
 905               */
 906              $expire = $expiration + ( 12 * HOUR_IN_SECONDS );
 907          } else {
 908              /** This filter is documented in wp-includes/pluggable.php */
 909              $expiration = time() + apply_filters( 'auth_cookie_expiration', 2 * DAY_IN_SECONDS, $user_id, $remember );
 910              $expire     = 0;
 911          }
 912  
 913          if ( '' === $secure ) {
 914              $secure = is_ssl();
 915          }
 916  
 917          // Front-end cookie is secure when the auth cookie is secure and the site's home URL uses HTTPS.
 918          $secure_logged_in_cookie = $secure && 'https' === parse_url( get_option( 'home' ), PHP_URL_SCHEME );
 919  
 920          /**
 921           * Filters whether the auth cookie should only be sent over HTTPS.
 922           *
 923           * @since 3.1.0
 924           *
 925           * @param bool $secure  Whether the cookie should only be sent over HTTPS.
 926           * @param int  $user_id User ID.
 927           */
 928          $secure = apply_filters( 'secure_auth_cookie', $secure, $user_id );
 929  
 930          /**
 931           * Filters whether the logged in cookie should only be sent over HTTPS.
 932           *
 933           * @since 3.1.0
 934           *
 935           * @param bool $secure_logged_in_cookie Whether the logged in cookie should only be sent over HTTPS.
 936           * @param int  $user_id                 User ID.
 937           * @param bool $secure                  Whether the auth cookie should only be sent over HTTPS.
 938           */
 939          $secure_logged_in_cookie = apply_filters( 'secure_logged_in_cookie', $secure_logged_in_cookie, $user_id, $secure );
 940  
 941          if ( $secure ) {
 942              $auth_cookie_name = SECURE_AUTH_COOKIE;
 943              $scheme           = 'secure_auth';
 944          } else {
 945              $auth_cookie_name = AUTH_COOKIE;
 946              $scheme           = 'auth';
 947          }
 948  
 949          if ( '' === $token ) {
 950              $manager = WP_Session_Tokens::get_instance( $user_id );
 951              $token   = $manager->create( $expiration );
 952          }
 953  
 954          $auth_cookie      = wp_generate_auth_cookie( $user_id, $expiration, $scheme, $token );
 955          $logged_in_cookie = wp_generate_auth_cookie( $user_id, $expiration, 'logged_in', $token );
 956  
 957          /**
 958           * Fires immediately before the authentication cookie is set.
 959           *
 960           * @since 2.5.0
 961           * @since 4.9.0 The `$token` parameter was added.
 962           *
 963           * @param string $auth_cookie Authentication cookie value.
 964           * @param int    $expire      The time the login grace period expires as a UNIX timestamp.
 965           *                            Default is 12 hours past the cookie's expiration time.
 966           * @param int    $expiration  The time when the authentication cookie expires as a UNIX timestamp.
 967           *                            Default is 14 days from now.
 968           * @param int    $user_id     User ID.
 969           * @param string $scheme      Authentication scheme. Values include 'auth' or 'secure_auth'.
 970           * @param string $token       User's session token to use for this cookie.
 971           */
 972          do_action( 'set_auth_cookie', $auth_cookie, $expire, $expiration, $user_id, $scheme, $token );
 973  
 974          /**
 975           * Fires immediately before the logged-in authentication cookie is set.
 976           *
 977           * @since 2.6.0
 978           * @since 4.9.0 The `$token` parameter was added.
 979           *
 980           * @param string $logged_in_cookie The logged-in cookie value.
 981           * @param int    $expire           The time the login grace period expires as a UNIX timestamp.
 982           *                                 Default is 12 hours past the cookie's expiration time.
 983           * @param int    $expiration       The time when the logged-in authentication cookie expires as a UNIX timestamp.
 984           *                                 Default is 14 days from now.
 985           * @param int    $user_id          User ID.
 986           * @param string $scheme           Authentication scheme. Default 'logged_in'.
 987           * @param string $token            User's session token to use for this cookie.
 988           */
 989          do_action( 'set_logged_in_cookie', $logged_in_cookie, $expire, $expiration, $user_id, 'logged_in', $token );
 990  
 991          /**
 992           * Allows preventing auth cookies from actually being sent to the client.
 993           *
 994           * @since 4.7.4
 995           *
 996           * @param bool $send Whether to send auth cookies to the client.
 997           */
 998          if ( ! apply_filters( 'send_auth_cookies', true ) ) {
 999              return;
1000          }
1001  
1002          setcookie( $auth_cookie_name, $auth_cookie, $expire, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
1003          setcookie( $auth_cookie_name, $auth_cookie, $expire, ADMIN_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
1004          setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
1005          if ( COOKIEPATH != SITECOOKIEPATH ) {
1006              setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
1007          }
1008      }
1009  endif;
1010  
1011  if ( ! function_exists( 'wp_clear_auth_cookie' ) ) :
1012      /**
1013       * Removes all of the cookies associated with authentication.
1014       *
1015       * @since 2.5.0
1016       */
1017  	function wp_clear_auth_cookie() {
1018          /**
1019           * Fires just before the authentication cookies are cleared.
1020           *
1021           * @since 2.7.0
1022           */
1023          do_action( 'clear_auth_cookie' );
1024  
1025          /** This filter is documented in wp-includes/pluggable.php */
1026          if ( ! apply_filters( 'send_auth_cookies', true ) ) {
1027              return;
1028          }
1029  
1030          // Auth cookies.
1031          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
1032          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
1033          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
1034          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
1035          setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1036          setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1037  
1038          // Settings cookies.
1039          setcookie( 'wp-settings-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
1040          setcookie( 'wp-settings-time-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
1041  
1042          // Old cookies.
1043          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1044          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1045          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1046          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1047  
1048          // Even older cookies.
1049          setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1050          setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1051          setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1052          setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1053  
1054          // Post password cookie.
1055          setcookie( 'wp-postpass_' . COOKIEHASH, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1056      }
1057  endif;
1058  
1059  if ( ! function_exists( 'is_user_logged_in' ) ) :
1060      /**
1061       * Determines whether the current visitor is a logged in user.
1062       *
1063       * For more information on this and similar theme functions, check out
1064       * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
1065       * Conditional Tags} article in the Theme Developer Handbook.
1066       *
1067       * @since 2.0.0
1068       *
1069       * @return bool True if user is logged in, false if not logged in.
1070       */
1071  	function is_user_logged_in() {
1072          $user = wp_get_current_user();
1073  
1074          return $user->exists();
1075      }
1076  endif;
1077  
1078  if ( ! function_exists( 'auth_redirect' ) ) :
1079      /**
1080       * Checks if a user is logged in, if not it redirects them to the login page.
1081       *
1082       * When this code is called from a page, it checks to see if the user viewing the page is logged in.
1083       * If the user is not logged in, they are redirected to the login page. The user is redirected
1084       * in such a way that, upon logging in, they will be sent directly to the page they were originally
1085       * trying to access.
1086       *
1087       * @since 1.5.0
1088       */
1089  	function auth_redirect() {
1090          $secure = ( is_ssl() || force_ssl_admin() );
1091  
1092          /**
1093           * Filters whether to use a secure authentication redirect.
1094           *
1095           * @since 3.1.0
1096           *
1097           * @param bool $secure Whether to use a secure authentication redirect. Default false.
1098           */
1099          $secure = apply_filters( 'secure_auth_redirect', $secure );
1100  
1101          // If https is required and request is http, redirect.
1102          if ( $secure && ! is_ssl() && false !== strpos( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
1103              if ( 0 === strpos( $_SERVER['REQUEST_URI'], 'http' ) ) {
1104                  wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
1105                  exit;
1106              } else {
1107                  wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
1108                  exit;
1109              }
1110          }
1111  
1112          /**
1113           * Filters the authentication redirect scheme.
1114           *
1115           * @since 2.9.0
1116           *
1117           * @param string $scheme Authentication redirect scheme. Default empty.
1118           */
1119          $scheme = apply_filters( 'auth_redirect_scheme', '' );
1120  
1121          $user_id = wp_validate_auth_cookie( '', $scheme );
1122          if ( $user_id ) {
1123              /**
1124               * Fires before the authentication redirect.
1125               *
1126               * @since 2.8.0
1127               *
1128               * @param int $user_id User ID.
1129               */
1130              do_action( 'auth_redirect', $user_id );
1131  
1132              // If the user wants ssl but the session is not ssl, redirect.
1133              if ( ! $secure && get_user_option( 'use_ssl', $user_id ) && false !== strpos( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
1134                  if ( 0 === strpos( $_SERVER['REQUEST_URI'], 'http' ) ) {
1135                      wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
1136                      exit;
1137                  } else {
1138                      wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
1139                      exit;
1140                  }
1141              }
1142  
1143              return; // The cookie is good, so we're done.
1144          }
1145  
1146          // The cookie is no good, so force login.
1147          nocache_headers();
1148  
1149          $redirect = ( strpos( $_SERVER['REQUEST_URI'], '/options.php' ) && wp_get_referer() ) ? wp_get_referer() : set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
1150  
1151          $login_url = wp_login_url( $redirect, true );
1152  
1153          wp_redirect( $login_url );
1154          exit;
1155      }
1156  endif;
1157  
1158  if ( ! function_exists( 'check_admin_referer' ) ) :
1159      /**
1160       * Ensures intent by verifying that a user was referred from another admin page with the correct security nonce.
1161       *
1162       * This function ensures the user intends to perform a given action, which helps protect against clickjacking style
1163       * attacks. It verifies intent, not authorisation, therefore it does not verify the user's capabilities. This should
1164       * be performed with `current_user_can()` or similar.
1165       *
1166       * If the nonce value is invalid, the function will exit with an "Are You Sure?" style message.
1167       *
1168       * @since 1.2.0
1169       * @since 2.5.0 The `$query_arg` parameter was added.
1170       *
1171       * @param int|string $action    The nonce action.
1172       * @param string     $query_arg Optional. Key to check for nonce in `$_REQUEST`. Default '_wpnonce'.
1173       * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
1174       *                   2 if the nonce is valid and generated between 12-24 hours ago.
1175       *                   False if the nonce is invalid.
1176       */
1177  	function check_admin_referer( $action = -1, $query_arg = '_wpnonce' ) {
1178          if ( -1 === $action ) {
1179              _doing_it_wrong( __FUNCTION__, __( 'You should specify an action to be verified by using the first parameter.' ), '3.2.0' );
1180          }
1181  
1182          $adminurl = strtolower( admin_url() );
1183          $referer  = strtolower( wp_get_referer() );
1184          $result   = isset( $_REQUEST[ $query_arg ] ) ? wp_verify_nonce( $_REQUEST[ $query_arg ], $action ) : false;
1185  
1186          /**
1187           * Fires once the admin request has been validated or not.
1188           *
1189           * @since 1.5.1
1190           *
1191           * @param string    $action The nonce action.
1192           * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
1193           *                          0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
1194           */
1195          do_action( 'check_admin_referer', $action, $result );
1196  
1197          if ( ! $result && ! ( -1 === $action && strpos( $referer, $adminurl ) === 0 ) ) {
1198              wp_nonce_ays( $action );
1199              die();
1200          }
1201  
1202          return $result;
1203      }
1204  endif;
1205  
1206  if ( ! function_exists( 'check_ajax_referer' ) ) :
1207      /**
1208       * Verifies the Ajax request to prevent processing requests external of the blog.
1209       *
1210       * @since 2.0.3
1211       *
1212       * @param int|string   $action    Action nonce.
1213       * @param false|string $query_arg Optional. Key to check for the nonce in `$_REQUEST` (since 2.5). If false,
1214       *                                `$_REQUEST` values will be evaluated for '_ajax_nonce', and '_wpnonce'
1215       *                                (in that order). Default false.
1216       * @param bool         $die       Optional. Whether to die early when the nonce cannot be verified.
1217       *                                Default true.
1218       * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
1219       *                   2 if the nonce is valid and generated between 12-24 hours ago.
1220       *                   False if the nonce is invalid.
1221       */
1222  	function check_ajax_referer( $action = -1, $query_arg = false, $die = true ) {
1223          if ( -1 == $action ) {
1224              _doing_it_wrong( __FUNCTION__, __( 'You should specify an action to be verified by using the first parameter.' ), '4.7.0' );
1225          }
1226  
1227          $nonce = '';
1228  
1229          if ( $query_arg && isset( $_REQUEST[ $query_arg ] ) ) {
1230              $nonce = $_REQUEST[ $query_arg ];
1231          } elseif ( isset( $_REQUEST['_ajax_nonce'] ) ) {
1232              $nonce = $_REQUEST['_ajax_nonce'];
1233          } elseif ( isset( $_REQUEST['_wpnonce'] ) ) {
1234              $nonce = $_REQUEST['_wpnonce'];
1235          }
1236  
1237          $result = wp_verify_nonce( $nonce, $action );
1238  
1239          /**
1240           * Fires once the Ajax request has been validated or not.
1241           *
1242           * @since 2.1.0
1243           *
1244           * @param string    $action The Ajax nonce action.
1245           * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
1246           *                          0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
1247           */
1248          do_action( 'check_ajax_referer', $action, $result );
1249  
1250          if ( $die && false === $result ) {
1251              if ( wp_doing_ajax() ) {
1252                  wp_die( -1, 403 );
1253              } else {
1254                  die( '-1' );
1255              }
1256          }
1257  
1258          return $result;
1259      }
1260  endif;
1261  
1262  if ( ! function_exists( 'wp_redirect' ) ) :
1263      /**
1264       * Redirects to another page.
1265       *
1266       * Note: wp_redirect() does not exit automatically, and should almost always be
1267       * followed by a call to `exit;`:
1268       *
1269       *     wp_redirect( $url );
1270       *     exit;
1271       *
1272       * Exiting can also be selectively manipulated by using wp_redirect() as a conditional
1273       * in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_location'} filters:
1274       *
1275       *     if ( wp_redirect( $url ) ) {
1276       *         exit;
1277       *     }
1278       *
1279       * @since 1.5.1
1280       * @since 5.1.0 The `$x_redirect_by` parameter was added.
1281       * @since 5.4.0 On invalid status codes, wp_die() is called.
1282       *
1283       * @global bool $is_IIS
1284       *
1285       * @param string $location      The path or URL to redirect to.
1286       * @param int    $status        Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
1287       * @param string $x_redirect_by Optional. The application doing the redirect. Default 'WordPress'.
1288       * @return bool False if the redirect was cancelled, true otherwise.
1289       */
1290  	function wp_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {
1291          global $is_IIS;
1292  
1293          /**
1294           * Filters the redirect location.
1295           *
1296           * @since 2.1.0
1297           *
1298           * @param string $location The path or URL to redirect to.
1299           * @param int    $status   The HTTP response status code to use.
1300           */
1301          $location = apply_filters( 'wp_redirect', $location, $status );
1302  
1303          /**
1304           * Filters the redirect HTTP response status code to use.
1305           *
1306           * @since 2.3.0
1307           *
1308           * @param int    $status   The HTTP response status code to use.
1309           * @param string $location The path or URL to redirect to.
1310           */
1311          $status = apply_filters( 'wp_redirect_status', $status, $location );
1312  
1313          if ( ! $location ) {
1314              return false;
1315          }
1316  
1317          if ( $status < 300 || 399 < $status ) {
1318              wp_die( __( 'HTTP redirect status code must be a redirection code, 3xx.' ) );
1319          }
1320  
1321          $location = wp_sanitize_redirect( $location );
1322  
1323          if ( ! $is_IIS && 'cgi-fcgi' !== PHP_SAPI ) {
1324              status_header( $status ); // This causes problems on IIS and some FastCGI setups.
1325          }
1326  
1327          /**
1328           * Filters the X-Redirect-By header.
1329           *
1330           * Allows applications to identify themselves when they're doing a redirect.
1331           *
1332           * @since 5.1.0
1333           *
1334           * @param string $x_redirect_by The application doing the redirect.
1335           * @param int    $status        Status code to use.
1336           * @param string $location      The path to redirect to.
1337           */
1338          $x_redirect_by = apply_filters( 'x_redirect_by', $x_redirect_by, $status, $location );
1339          if ( is_string( $x_redirect_by ) ) {
1340              header( "X-Redirect-By: $x_redirect_by" );
1341          }
1342  
1343          header( "Location: $location", true, $status );
1344  
1345          return true;
1346      }
1347  endif;
1348  
1349  if ( ! function_exists( 'wp_sanitize_redirect' ) ) :
1350      /**
1351       * Sanitizes a URL for use in a redirect.
1352       *
1353       * @since 2.3.0
1354       *
1355       * @param string $location The path to redirect to.
1356       * @return string Redirect-sanitized URL.
1357       */
1358  	function wp_sanitize_redirect( $location ) {
1359          // Encode spaces.
1360          $location = str_replace( ' ', '%20', $location );
1361  
1362          $regex    = '/
1363          (
1364              (?: [\xC2-\xDF][\x80-\xBF]        # double-byte sequences   110xxxxx 10xxxxxx
1365              |   \xE0[\xA0-\xBF][\x80-\xBF]    # triple-byte sequences   1110xxxx 10xxxxxx * 2
1366              |   [\xE1-\xEC][\x80-\xBF]{2}
1367              |   \xED[\x80-\x9F][\x80-\xBF]
1368              |   [\xEE-\xEF][\x80-\xBF]{2}
1369              |   \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
1370              |   [\xF1-\xF3][\x80-\xBF]{3}
1371              |   \xF4[\x80-\x8F][\x80-\xBF]{2}
1372          ){1,40}                              # ...one or more times
1373          )/x';
1374          $location = preg_replace_callback( $regex, '_wp_sanitize_utf8_in_redirect', $location );
1375          $location = preg_replace( '|[^a-z0-9-~+_.?#=&;,/:%!*\[\]()@]|i', '', $location );
1376          $location = wp_kses_no_null( $location );
1377  
1378          // Remove %0D and %0A from location.
1379          $strip = array( '%0d', '%0a', '%0D', '%0A' );
1380          return _deep_replace( $strip, $location );
1381      }
1382  
1383      /**
1384       * URL encode UTF-8 characters in a URL.
1385       *
1386       * @ignore
1387       * @since 4.2.0
1388       * @access private
1389       *
1390       * @see wp_sanitize_redirect()
1391       *
1392       * @param array $matches RegEx matches against the redirect location.
1393       * @return string URL-encoded version of the first RegEx match.
1394       */
1395  	function _wp_sanitize_utf8_in_redirect( $matches ) {
1396          return urlencode( $matches[0] );
1397      }
1398  endif;
1399  
1400  if ( ! function_exists( 'wp_safe_redirect' ) ) :
1401      /**
1402       * Performs a safe (local) redirect, using wp_redirect().
1403       *
1404       * Checks whether the $location is using an allowed host, if it has an absolute
1405       * path. A plugin can therefore set or remove allowed host(s) to or from the
1406       * list.
1407       *
1408       * If the host is not allowed, then the redirect defaults to wp-admin on the siteurl
1409       * instead. This prevents malicious redirects which redirect to another host,
1410       * but only used in a few places.
1411       *
1412       * Note: wp_safe_redirect() does not exit automatically, and should almost always be
1413       * followed by a call to `exit;`:
1414       *
1415       *     wp_safe_redirect( $url );
1416       *     exit;
1417       *
1418       * Exiting can also be selectively manipulated by using wp_safe_redirect() as a conditional
1419       * in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_location'} filters:
1420       *
1421       *     if ( wp_safe_redirect( $url ) ) {
1422       *         exit;
1423       *     }
1424       *
1425       * @since 2.3.0
1426       * @since 5.1.0 The return value from wp_redirect() is now passed on, and the `$x_redirect_by` parameter was added.
1427       *
1428       * @param string $location      The path or URL to redirect to.
1429       * @param int    $status        Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
1430       * @param string $x_redirect_by Optional. The application doing the redirect. Default 'WordPress'.
1431       * @return bool False if the redirect was cancelled, true otherwise.
1432       */
1433  	function wp_safe_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {
1434  
1435          // Need to look at the URL the way it will end up in wp_redirect().
1436          $location = wp_sanitize_redirect( $location );
1437  
1438          /**
1439           * Filters the redirect fallback URL for when the provided redirect is not safe (local).
1440           *
1441           * @since 4.3.0
1442           *
1443           * @param string $fallback_url The fallback URL to use by default.
1444           * @param int    $status       The HTTP response status code to use.
1445           */
1446          $location = wp_validate_redirect( $location, apply_filters( 'wp_safe_redirect_fallback', admin_url(), $status ) );
1447  
1448          return wp_redirect( $location, $status, $x_redirect_by );
1449      }
1450  endif;
1451  
1452  if ( ! function_exists( 'wp_validate_redirect' ) ) :
1453      /**
1454       * Validates a URL for use in a redirect.
1455       *
1456       * Checks whether the $location is using an allowed host, if it has an absolute
1457       * path. A plugin can therefore set or remove allowed host(s) to or from the
1458       * list.
1459       *
1460       * If the host is not allowed, then the redirect is to $default supplied
1461       *
1462       * @since 2.8.1
1463       *
1464       * @param string $location The redirect to validate
1465       * @param string $default  The value to return if $location is not allowed
1466       * @return string redirect-sanitized URL
1467       */
1468  	function wp_validate_redirect( $location, $default = '' ) {
1469          $location = wp_sanitize_redirect( trim( $location, " \t\n\r\0\x08\x0B" ) );
1470          // Browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'.
1471          if ( '//' === substr( $location, 0, 2 ) ) {
1472              $location = 'http:' . $location;
1473          }
1474  
1475          // In PHP 5 parse_url() may fail if the URL query part contains 'http://'.
1476          // See https://bugs.php.net/bug.php?id=38143
1477          $cut  = strpos( $location, '?' );
1478          $test = $cut ? substr( $location, 0, $cut ) : $location;
1479  
1480          $lp = parse_url( $test );
1481  
1482          // Give up if malformed URL.
1483          if ( false === $lp ) {
1484              return $default;
1485          }
1486  
1487          // Allow only 'http' and 'https' schemes. No 'data:', etc.
1488          if ( isset( $lp['scheme'] ) && ! ( 'http' === $lp['scheme'] || 'https' === $lp['scheme'] ) ) {
1489              return $default;
1490          }
1491  
1492          if ( ! isset( $lp['host'] ) && ! empty( $lp['path'] ) && '/' !== $lp['path'][0] ) {
1493              $path = '';
1494              if ( ! empty( $_SERVER['REQUEST_URI'] ) ) {
1495                  $path = dirname( parse_url( 'http://placeholder' . $_SERVER['REQUEST_URI'], PHP_URL_PATH ) . '?' );
1496                  $path = wp_normalize_path( $path );
1497              }
1498              $location = '/' . ltrim( $path . '/', '/' ) . $location;
1499          }
1500  
1501          // Reject if certain components are set but host is not.
1502          // This catches URLs like https:host.com for which parse_url() does not set the host field.
1503          if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
1504              return $default;
1505          }
1506  
1507          // Reject malformed components parse_url() can return on odd inputs.
1508          foreach ( array( 'user', 'pass', 'host' ) as $component ) {
1509              if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
1510                  return $default;
1511              }
1512          }
1513  
1514          $wpp = parse_url( home_url() );
1515  
1516          /**
1517           * Filters the list of allowed hosts to redirect to.
1518           *
1519           * @since 2.3.0
1520           *
1521           * @param string[] $hosts An array of allowed host names.
1522           * @param string   $host  The host name of the redirect destination; empty string if not set.
1523           */
1524          $allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array( $wpp['host'] ), isset( $lp['host'] ) ? $lp['host'] : '' );
1525  
1526          if ( isset( $lp['host'] ) && ( ! in_array( $lp['host'], $allowed_hosts, true ) && strtolower( $wpp['host'] ) !== $lp['host'] ) ) {
1527              $location = $default;
1528          }
1529  
1530          return $location;
1531      }
1532  endif;
1533  
1534  if ( ! function_exists( 'wp_notify_postauthor' ) ) :
1535      /**
1536       * Notify an author (and/or others) of a comment/trackback/pingback on a post.
1537       *
1538       * @since 1.0.0
1539       *
1540       * @param int|WP_Comment $comment_id Comment ID or WP_Comment object.
1541       * @param string         $deprecated Not used
1542       * @return bool True on completion. False if no email addresses were specified.
1543       */
1544  	function wp_notify_postauthor( $comment_id, $deprecated = null ) {
1545          if ( null !== $deprecated ) {
1546              _deprecated_argument( __FUNCTION__, '3.8.0' );
1547          }
1548  
1549          $comment = get_comment( $comment_id );
1550          if ( empty( $comment ) || empty( $comment->comment_post_ID ) ) {
1551              return false;
1552          }
1553  
1554          $post   = get_post( $comment->comment_post_ID );
1555          $author = get_userdata( $post->post_author );
1556  
1557          // Who to notify? By default, just the post author, but others can be added.
1558          $emails = array();
1559          if ( $author ) {
1560              $emails[] = $author->user_email;
1561          }
1562  
1563          /**
1564           * Filters the list of email addresses to receive a comment notification.
1565           *
1566           * By default, only post authors are notified of comments. This filter allows
1567           * others to be added.
1568           *
1569           * @since 3.7.0
1570           *
1571           * @param string[] $emails     An array of email addresses to receive a comment notification.
1572           * @param int      $comment_id The comment ID.
1573           */
1574          $emails = apply_filters( 'comment_notification_recipients', $emails, $comment->comment_ID );
1575          $emails = array_filter( $emails );
1576  
1577          // If there are no addresses to send the comment to, bail.
1578          if ( ! count( $emails ) ) {
1579              return false;
1580          }
1581  
1582          // Facilitate unsetting below without knowing the keys.
1583          $emails = array_flip( $emails );
1584  
1585          /**
1586           * Filters whether to notify comment authors of their comments on their own posts.
1587           *
1588           * By default, comment authors aren't notified of their comments on their own
1589           * posts. This filter allows you to override that.
1590           *
1591           * @since 3.8.0
1592           *
1593           * @param bool $notify     Whether to notify the post author of their own comment.
1594           *                         Default false.
1595           * @param int  $comment_id The comment ID.
1596           */
1597          $notify_author = apply_filters( 'comment_notification_notify_author', false, $comment->comment_ID );
1598  
1599          // The comment was left by the author.
1600          if ( $author && ! $notify_author && $comment->user_id == $post->post_author ) {
1601              unset( $emails[ $author->user_email ] );
1602          }
1603  
1604          // The author moderated a comment on their own post.
1605          if ( $author && ! $notify_author && get_current_user_id() == $post->post_author ) {
1606              unset( $emails[ $author->user_email ] );
1607          }
1608  
1609          // The post author is no longer a member of the blog.
1610          if ( $author && ! $notify_author && ! user_can( $post->post_author, 'read_post', $post->ID ) ) {
1611              unset( $emails[ $author->user_email ] );
1612          }
1613  
1614          // If there's no email to send the comment to, bail, otherwise flip array back around for use below.
1615          if ( ! count( $emails ) ) {
1616              return false;
1617          } else {
1618              $emails = array_flip( $emails );
1619          }
1620  
1621          $switched_locale = switch_to_locale( get_locale() );
1622  
1623          $comment_author_domain = '';
1624          if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
1625              $comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
1626          }
1627  
1628          // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
1629          // We want to reverse this for the plain text arena of emails.
1630          $blogname        = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
1631          $comment_content = wp_specialchars_decode( $comment->comment_content );
1632  
1633          switch ( $comment->comment_type ) {
1634              case 'trackback':
1635                  /* translators: %s: Post title. */
1636                  $notify_message = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "\r\n";
1637                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1638                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1639                  /* translators: %s: Trackback/pingback/comment author URL. */
1640                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1641                  /* translators: %s: Comment text. */
1642                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1643                  $notify_message .= __( 'You can see all trackbacks on this post here:' ) . "\r\n";
1644                  /* translators: Trackback notification email subject. 1: Site title, 2: Post title. */
1645                  $subject = sprintf( __( '[%1$s] Trackback: "%2$s"' ), $blogname, $post->post_title );
1646                  break;
1647  
1648              case 'pingback':
1649                  /* translators: %s: Post title. */
1650                  $notify_message = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "\r\n";
1651                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1652                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1653                  /* translators: %s: Trackback/pingback/comment author URL. */
1654                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1655                  /* translators: %s: Comment text. */
1656                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1657                  $notify_message .= __( 'You can see all pingbacks on this post here:' ) . "\r\n";
1658                  /* translators: Pingback notification email subject. 1: Site title, 2: Post title. */
1659                  $subject = sprintf( __( '[%1$s] Pingback: "%2$s"' ), $blogname, $post->post_title );
1660                  break;
1661  
1662              default: // Comments.
1663                  /* translators: %s: Post title. */
1664                  $notify_message = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "\r\n";
1665                  /* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
1666                  $notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1667                  /* translators: %s: Comment author email. */
1668                  $notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
1669                  /* translators: %s: Trackback/pingback/comment author URL. */
1670                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1671  
1672                  if ( $comment->comment_parent && user_can( $post->post_author, 'edit_comment', $comment->comment_parent ) ) {
1673                      /* translators: Comment moderation. %s: Parent comment edit URL. */
1674                      $notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
1675                  }
1676  
1677                  /* translators: %s: Comment text. */
1678                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1679                  $notify_message .= __( 'You can see all comments on this post here:' ) . "\r\n";
1680                  /* translators: Comment notification email subject. 1: Site title, 2: Post title. */
1681                  $subject = sprintf( __( '[%1$s] Comment: "%2$s"' ), $blogname, $post->post_title );
1682                  break;
1683          }
1684  
1685          $notify_message .= get_permalink( $comment->comment_post_ID ) . "#comments\r\n\r\n";
1686          /* translators: %s: Comment URL. */
1687          $notify_message .= sprintf( __( 'Permalink: %s' ), get_comment_link( $comment ) ) . "\r\n";
1688  
1689          if ( user_can( $post->post_author, 'edit_comment', $comment->comment_ID ) ) {
1690              if ( EMPTY_TRASH_DAYS ) {
1691                  /* translators: Comment moderation. %s: Comment action URL. */
1692                  $notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
1693              } else {
1694                  /* translators: Comment moderation. %s: Comment action URL. */
1695                  $notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
1696              }
1697              /* translators: Comment moderation. %s: Comment action URL. */
1698              $notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
1699          }
1700  
1701          $wp_email = 'wordpress@' . preg_replace( '#^www\.#', '', wp_parse_url( network_home_url(), PHP_URL_HOST ) );
1702  
1703          if ( '' === $comment->comment_author ) {
1704              $from = "From: \"$blogname\" <$wp_email>";
1705              if ( '' !== $comment->comment_author_email ) {
1706                  $reply_to = "Reply-To: $comment->comment_author_email";
1707              }
1708          } else {
1709              $from = "From: \"$comment->comment_author\" <$wp_email>";
1710              if ( '' !== $comment->comment_author_email ) {
1711                  $reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>";
1712              }
1713          }
1714  
1715          $message_headers = "$from\n"
1716          . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";
1717  
1718          if ( isset( $reply_to ) ) {
1719              $message_headers .= $reply_to . "\n";
1720          }
1721  
1722          /**
1723           * Filters the comment notification email text.
1724           *
1725           * @since 1.5.2
1726           *
1727           * @param string $notify_message The comment notification email text.
1728           * @param int    $comment_id     Comment ID.
1729           */
1730          $notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment->comment_ID );
1731  
1732          /**
1733           * Filters the comment notification email subject.
1734           *
1735           * @since 1.5.2
1736           *
1737           * @param string $subject    The comment notification email subject.
1738           * @param int    $comment_id Comment ID.
1739           */
1740          $subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID );
1741  
1742          /**
1743           * Filters the comment notification email headers.
1744           *
1745           * @since 1.5.2
1746           *
1747           * @param string $message_headers Headers for the comment notification email.
1748           * @param int    $comment_id      Comment ID.
1749           */
1750          $message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment->comment_ID );
1751  
1752          foreach ( $emails as $email ) {
1753              wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );
1754          }
1755  
1756          if ( $switched_locale ) {
1757              restore_previous_locale();
1758          }
1759  
1760          return true;
1761      }
1762  endif;
1763  
1764  if ( ! function_exists( 'wp_notify_moderator' ) ) :
1765      /**
1766       * Notifies the moderator of the site about a new comment that is awaiting approval.
1767       *
1768       * @since 1.0.0
1769       *
1770       * @global wpdb $wpdb WordPress database abstraction object.
1771       *
1772       * Uses the {@see 'notify_moderator'} filter to determine whether the site moderator
1773       * should be notified, overriding the site setting.
1774       *
1775       * @param int $comment_id Comment ID.
1776       * @return true Always returns true.
1777       */
1778  	function wp_notify_moderator( $comment_id ) {
1779          global $wpdb;
1780  
1781          $maybe_notify = get_option( 'moderation_notify' );
1782  
1783          /**
1784           * Filters whether to send the site moderator email notifications, overriding the site setting.
1785           *
1786           * @since 4.4.0
1787           *
1788           * @param bool $maybe_notify Whether to notify blog moderator.
1789           * @param int  $comment_ID   The id of the comment for the notification.
1790           */
1791          $maybe_notify = apply_filters( 'notify_moderator', $maybe_notify, $comment_id );
1792  
1793          if ( ! $maybe_notify ) {
1794              return true;
1795          }
1796  
1797          $comment = get_comment( $comment_id );
1798          $post    = get_post( $comment->comment_post_ID );
1799          $user    = get_userdata( $post->post_author );
1800          // Send to the administration and to the post author if the author can modify the comment.
1801          $emails = array( get_option( 'admin_email' ) );
1802          if ( $user && user_can( $user->ID, 'edit_comment', $comment_id ) && ! empty( $user->user_email ) ) {
1803              if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {
1804                  $emails[] = $user->user_email;
1805              }
1806          }
1807  
1808          $switched_locale = switch_to_locale( get_locale() );
1809  
1810          $comment_author_domain = '';
1811          if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
1812              $comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
1813          }
1814  
1815          $comments_waiting = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '0'" );
1816  
1817          // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
1818          // We want to reverse this for the plain text arena of emails.
1819          $blogname        = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
1820          $comment_content = wp_specialchars_decode( $comment->comment_content );
1821  
1822          switch ( $comment->comment_type ) {
1823              case 'trackback':
1824                  /* translators: %s: Post title. */
1825                  $notify_message  = sprintf( __( 'A new trackback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
1826                  $notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
1827                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1828                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1829                  /* translators: %s: Trackback/pingback/comment author URL. */
1830                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1831                  $notify_message .= __( 'Trackback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
1832                  break;
1833  
1834              case 'pingback':
1835                  /* translators: %s: Post title. */
1836                  $notify_message  = sprintf( __( 'A new pingback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
1837                  $notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
1838                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1839                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1840                  /* translators: %s: Trackback/pingback/comment author URL. */
1841                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1842                  $notify_message .= __( 'Pingback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
1843                  break;
1844  
1845              default: // Comments.
1846                  /* translators: %s: Post title. */
1847                  $notify_message  = sprintf( __( 'A new comment on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
1848                  $notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
1849                  /* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
1850                  $notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1851                  /* translators: %s: Comment author email. */
1852                  $notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
1853                  /* translators: %s: Trackback/pingback/comment author URL. */
1854                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1855  
1856                  if ( $comment->comment_parent ) {
1857                      /* translators: Comment moderation. %s: Parent comment edit URL. */
1858                      $notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
1859                  }
1860  
1861                  /* translators: %s: Comment text. */
1862                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1863                  break;
1864          }
1865  
1866          /* translators: Comment moderation. %s: Comment action URL. */
1867          $notify_message .= sprintf( __( 'Approve it: %s' ), admin_url( "comment.php?action=approve&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1868  
1869          if ( EMPTY_TRASH_DAYS ) {
1870              /* translators: Comment moderation. %s: Comment action URL. */
1871              $notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1872          } else {
1873              /* translators: Comment moderation. %s: Comment action URL. */
1874              $notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1875          }
1876  
1877          /* translators: Comment moderation. %s: Comment action URL. */
1878          $notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1879  
1880          $notify_message .= sprintf(
1881              /* translators: Comment moderation. %s: Number of comments awaiting approval. */
1882              _n(
1883                  'Currently %s comment is waiting for approval. Please visit the moderation panel:',
1884                  'Currently %s comments are waiting for approval. Please visit the moderation panel:',
1885                  $comments_waiting
1886              ),
1887              number_format_i18n( $comments_waiting )
1888          ) . "\r\n";
1889          $notify_message .= admin_url( 'edit-comments.php?comment_status=moderated#wpbody-content' ) . "\r\n";
1890  
1891          /* translators: Comment moderation notification email subject. 1: Site title, 2: Post title. */
1892          $subject         = sprintf( __( '[%1$s] Please moderate: "%2$s"' ), $blogname, $post->post_title );
1893          $message_headers = '';
1894  
1895          /**
1896           * Filters the list of recipients for comment moderation emails.
1897           *
1898           * @since 3.7.0
1899           *
1900           * @param string[] $emails     List of email addresses to notify for comment moderation.
1901           * @param int      $comment_id Comment ID.
1902           */
1903          $emails = apply_filters( 'comment_moderation_recipients', $emails, $comment_id );
1904  
1905          /**
1906           * Filters the comment moderation email text.
1907           *
1908           * @since 1.5.2
1909           *
1910           * @param string $notify_message Text of the comment moderation email.
1911           * @param int    $comment_id     Comment ID.
1912           */
1913          $notify_message = apply_filters( 'comment_moderation_text', $notify_message, $comment_id );
1914  
1915          /**
1916           * Filters the comment moderation email subject.
1917           *
1918           * @since 1.5.2
1919           *
1920           * @param string $subject    Subject of the comment moderation email.
1921           * @param int    $comment_id Comment ID.
1922           */
1923          $subject = apply_filters( 'comment_moderation_subject', $subject, $comment_id );
1924  
1925          /**
1926           * Filters the comment moderation email headers.
1927           *
1928           * @since 2.8.0
1929           *
1930           * @param string $message_headers Headers for the comment moderation email.
1931           * @param int    $comment_id      Comment ID.
1932           */
1933          $message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id );
1934  
1935          foreach ( $emails as $email ) {
1936              wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );
1937          }
1938  
1939          if ( $switched_locale ) {
1940              restore_previous_locale();
1941          }
1942  
1943          return true;
1944      }
1945  endif;
1946  
1947  if ( ! function_exists( 'wp_password_change_notification' ) ) :
1948      /**
1949       * Notify the blog admin of a user changing password, normally via email.
1950       *
1951       * @since 2.7.0
1952       *
1953       * @param WP_User $user User object.
1954       */
1955  	function wp_password_change_notification( $user ) {
1956          // Send a copy of password change notification to the admin,
1957          // but check to see if it's the admin whose password we're changing, and skip this.
1958          if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {
1959              /* translators: %s: User name. */
1960              $message = sprintf( __( 'Password changed for user: %s' ), $user->user_login ) . "\r\n";
1961              // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
1962              // We want to reverse this for the plain text arena of emails.
1963              $blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
1964  
1965              $wp_password_change_notification_email = array(
1966                  'to'      => get_option( 'admin_email' ),
1967                  /* translators: Password change notification email subject. %s: Site title. */
1968                  'subject' => __( '[%s] Password Changed' ),
1969                  'message' => $message,
1970                  'headers' => '',
1971              );
1972  
1973              /**
1974               * Filters the contents of the password change notification email sent to the site admin.
1975               *
1976               * @since 4.9.0
1977               *
1978               * @param array   $wp_password_change_notification_email {
1979               *     Used to build wp_mail().
1980               *
1981               *     @type string $to      The intended recipient - site admin email address.
1982               *     @type string $subject The subject of the email.
1983               *     @type string $message The body of the email.
1984               *     @type string $headers The headers of the email.
1985               * }
1986               * @param WP_User $user     User object for user whose password was changed.
1987               * @param string  $blogname The site title.
1988               */
1989              $wp_password_change_notification_email = apply_filters( 'wp_password_change_notification_email', $wp_password_change_notification_email, $user, $blogname );
1990  
1991              wp_mail(
1992                  $wp_password_change_notification_email['to'],
1993                  wp_specialchars_decode( sprintf( $wp_password_change_notification_email['subject'], $blogname ) ),
1994                  $wp_password_change_notification_email['message'],
1995                  $wp_password_change_notification_email['headers']
1996              );
1997          }
1998      }
1999  endif;
2000  
2001  if ( ! function_exists( 'wp_new_user_notification' ) ) :
2002      /**
2003       * Email login credentials to a newly-registered user.
2004       *
2005       * A new user registration notification is also sent to admin email.
2006       *
2007       * @since 2.0.0
2008       * @since 4.3.0 The `$plaintext_pass` parameter was changed to `$notify`.
2009       * @since 4.3.1 The `$plaintext_pass` parameter was deprecated. `$notify` added as a third parameter.
2010       * @since 4.6.0 The `$notify` parameter accepts 'user' for sending notification only to the user created.
2011       *
2012       * @param int    $user_id    User ID.
2013       * @param null   $deprecated Not used (argument deprecated).
2014       * @param string $notify     Optional. Type of notification that should happen. Accepts 'admin' or an empty
2015       *                           string (admin only), 'user', or 'both' (admin and user). Default empty.
2016       */
2017  	function wp_new_user_notification( $user_id, $deprecated = null, $notify = '' ) {
2018          if ( null !== $deprecated ) {
2019              _deprecated_argument( __FUNCTION__, '4.3.1' );
2020          }
2021  
2022          // Accepts only 'user', 'admin' , 'both' or default '' as $notify.
2023          if ( ! in_array( $notify, array( 'user', 'admin', 'both', '' ), true ) ) {
2024              return;
2025          }
2026  
2027          $user = get_userdata( $user_id );
2028  
2029          // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
2030          // We want to reverse this for the plain text arena of emails.
2031          $blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
2032  
2033          if ( 'user' !== $notify ) {
2034              $switched_locale = switch_to_locale( get_locale() );
2035  
2036              /* translators: %s: Site title. */
2037              $message = sprintf( __( 'New user registration on your site %s:' ), $blogname ) . "\r\n\r\n";
2038              /* translators: %s: User login. */
2039              $message .= sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
2040              /* translators: %s: User email address. */
2041              $message .= sprintf( __( 'Email: %s' ), $user->user_email ) . "\r\n";
2042  
2043              $wp_new_user_notification_email_admin = array(
2044                  'to'      => get_option( 'admin_email' ),
2045                  /* translators: New user registration notification email subject. %s: Site title. */
2046                  'subject' => __( '[%s] New User Registration' ),
2047                  'message' => $message,
2048                  'headers' => '',
2049              );
2050  
2051              /**
2052               * Filters the contents of the new user notification email sent to the site admin.
2053               *
2054               * @since 4.9.0
2055               *
2056               * @param array   $wp_new_user_notification_email_admin {
2057               *     Used to build wp_mail().
2058               *
2059               *     @type string $to      The intended recipient - site admin email address.
2060               *     @type string $subject The subject of the email.
2061               *     @type string $message The body of the email.
2062               *     @type string $headers The headers of the email.
2063               * }
2064               * @param WP_User $user     User object for new user.
2065               * @param string  $blogname The site title.
2066               */
2067              $wp_new_user_notification_email_admin = apply_filters( 'wp_new_user_notification_email_admin', $wp_new_user_notification_email_admin, $user, $blogname );
2068  
2069              wp_mail(
2070                  $wp_new_user_notification_email_admin['to'],
2071                  wp_specialchars_decode( sprintf( $wp_new_user_notification_email_admin['subject'], $blogname ) ),
2072                  $wp_new_user_notification_email_admin['message'],
2073                  $wp_new_user_notification_email_admin['headers']
2074              );
2075  
2076              if ( $switched_locale ) {
2077                  restore_previous_locale();
2078              }
2079          }
2080  
2081          // `$deprecated` was pre-4.3 `$plaintext_pass`. An empty `$plaintext_pass` didn't sent a user notification.
2082          if ( 'admin' === $notify || ( empty( $deprecated ) && empty( $notify ) ) ) {
2083              return;
2084          }
2085  
2086          $key = get_password_reset_key( $user );
2087          if ( is_wp_error( $key ) ) {
2088              return;
2089          }
2090  
2091          $switched_locale = switch_to_locale( get_user_locale( $user ) );
2092  
2093          /* translators: %s: User login. */
2094          $message  = sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
2095          $message .= __( 'To set your password, visit the following address:' ) . "\r\n\r\n";
2096          $message .= network_site_url( "wp-login.php?action=rp&key=$key&login=" . rawurlencode( $user->user_login ), 'login' ) . "\r\n\r\n";
2097  
2098          $message .= wp_login_url() . "\r\n";
2099  
2100          $wp_new_user_notification_email = array(
2101              'to'      => $user->user_email,
2102              /* translators: Login details notification email subject. %s: Site title. */
2103              'subject' => __( '[%s] Login Details' ),
2104              'message' => $message,
2105              'headers' => '',
2106          );
2107  
2108          /**
2109           * Filters the contents of the new user notification email sent to the new user.
2110           *
2111           * @since 4.9.0
2112           *
2113           * @param array   $wp_new_user_notification_email {
2114           *     Used to build wp_mail().
2115           *
2116           *     @type string $to      The intended recipient - New user email address.
2117           *     @type string $subject The subject of the email.
2118           *     @type string $message The body of the email.
2119           *     @type string $headers The headers of the email.
2120           * }
2121           * @param WP_User $user     User object for new user.
2122           * @param string  $blogname The site title.
2123           */
2124          $wp_new_user_notification_email = apply_filters( 'wp_new_user_notification_email', $wp_new_user_notification_email, $user, $blogname );
2125  
2126          wp_mail(
2127              $wp_new_user_notification_email['to'],
2128              wp_specialchars_decode( sprintf( $wp_new_user_notification_email['subject'], $blogname ) ),
2129              $wp_new_user_notification_email['message'],
2130              $wp_new_user_notification_email['headers']
2131          );
2132  
2133          if ( $switched_locale ) {
2134              restore_previous_locale();
2135          }
2136      }
2137  endif;
2138  
2139  if ( ! function_exists( 'wp_nonce_tick' ) ) :
2140      /**
2141       * Returns the time-dependent variable for nonce creation.
2142       *
2143       * A nonce has a lifespan of two ticks. Nonces in their second tick may be
2144       * updated, e.g. by autosave.
2145       *
2146       * @since 2.5.0
2147       *
2148       * @return float Float value rounded up to the next highest integer.
2149       */
2150  	function wp_nonce_tick() {
2151          /**
2152           * Filters the lifespan of nonces in seconds.
2153           *
2154           * @since 2.5.0
2155           *
2156           * @param int $lifespan Lifespan of nonces in seconds. Default 86,400 seconds, or one day.
2157           */
2158          $nonce_life = apply_filters( 'nonce_life', DAY_IN_SECONDS );
2159  
2160          return ceil( time() / ( $nonce_life / 2 ) );
2161      }
2162  endif;
2163  
2164  if ( ! function_exists( 'wp_verify_nonce' ) ) :
2165      /**
2166       * Verifies that a correct security nonce was used with time limit.
2167       *
2168       * A nonce is valid for 24 hours (by default).
2169       *
2170       * @since 2.0.3
2171       *
2172       * @param string     $nonce  Nonce value that was used for verification, usually via a form field.
2173       * @param string|int $action Should give context to what is taking place and be the same when nonce was created.
2174       * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
2175       *                   2 if the nonce is valid and generated between 12-24 hours ago.
2176       *                   False if the nonce is invalid.
2177       */
2178  	function wp_verify_nonce( $nonce, $action = -1 ) {
2179          $nonce = (string) $nonce;
2180          $user  = wp_get_current_user();
2181          $uid   = (int) $user->ID;
2182          if ( ! $uid ) {
2183              /**
2184               * Filters whether the user who generated the nonce is logged out.
2185               *
2186               * @since 3.5.0
2187               *
2188               * @param int    $uid    ID of the nonce-owning user.
2189               * @param string $action The nonce action.
2190               */
2191              $uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
2192          }
2193  
2194          if ( empty( $nonce ) ) {
2195              return false;
2196          }
2197  
2198          $token = wp_get_session_token();
2199          $i     = wp_nonce_tick();
2200  
2201          // Nonce generated 0-12 hours ago.
2202          $expected = substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
2203          if ( hash_equals( $expected, $nonce ) ) {
2204              return 1;
2205          }
2206  
2207          // Nonce generated 12-24 hours ago.
2208          $expected = substr( wp_hash( ( $i - 1 ) . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
2209          if ( hash_equals( $expected, $nonce ) ) {
2210              return 2;
2211          }
2212  
2213          /**
2214           * Fires when nonce verification fails.
2215           *
2216           * @since 4.4.0
2217           *
2218           * @param string     $nonce  The invalid nonce.
2219           * @param string|int $action The nonce action.
2220           * @param WP_User    $user   The current user object.
2221           * @param string     $token  The user's session token.
2222           */
2223          do_action( 'wp_verify_nonce_failed', $nonce, $action, $user, $token );
2224  
2225          // Invalid nonce.
2226          return false;
2227      }
2228  endif;
2229  
2230  if ( ! function_exists( 'wp_create_nonce' ) ) :
2231      /**
2232       * Creates a cryptographic token tied to a specific action, user, user session,
2233       * and window of time.
2234       *
2235       * @since 2.0.3
2236       * @since 4.0.0 Session tokens were integrated with nonce creation
2237       *
2238       * @param string|int $action Scalar value to add context to the nonce.
2239       * @return string The token.
2240       */
2241  	function wp_create_nonce( $action = -1 ) {
2242          $user = wp_get_current_user();
2243          $uid  = (int) $user->ID;
2244          if ( ! $uid ) {
2245              /** This filter is documented in wp-includes/pluggable.php */
2246              $uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
2247          }
2248  
2249          $token = wp_get_session_token();
2250          $i     = wp_nonce_tick();
2251  
2252          return substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
2253      }
2254  endif;
2255  
2256  if ( ! function_exists( 'wp_salt' ) ) :
2257      /**
2258       * Returns a salt to add to hashes.
2259       *
2260       * Salts are created using secret keys. Secret keys are located in two places:
2261       * in the database and in the wp-config.php file. The secret key in the database
2262       * is randomly generated and will be appended to the secret keys in wp-config.php.
2263       *
2264       * The secret keys in wp-config.php should be updated to strong, random keys to maximize
2265       * security. Below is an example of how the secret key constants are defined.
2266       * Do not paste this example directly into wp-config.php. Instead, have a
2267       * {@link https://api.wordpress.org/secret-key/1.1/salt/ secret key created} just
2268       * for you.
2269       *
2270       *     define('AUTH_KEY',         ' Xakm<o xQy rw4EMsLKM-?!T+,PFF})H4lzcW57AF0U@N@< >M%G4Yt>f`z]MON');
2271       *     define('SECURE_AUTH_KEY',  'LzJ}op]mr|6+![P}Ak:uNdJCJZd>(Hx.-Mh#Tz)pCIU#uGEnfFz|f ;;eU%/U^O~');
2272       *     define('LOGGED_IN_KEY',    '|i|Ux`9<p-h$aFf(qnT:sDO:D1P^wZ$$/Ra@miTJi9G;ddp_<q}6H1)o|a +&JCM');
2273       *     define('NONCE_KEY',        '%:R{[P|,s.KuMltH5}cI;/k<Gx~j!f0I)m_sIyu+&NJZ)-iO>z7X>QYR0Z_XnZ@|');
2274       *     define('AUTH_SALT',        'eZyT)-Naw]F8CwA*VaW#q*|.)g@o}||wf~@C-YSt}(dh_r6EbI#A,y|nU2{B#JBW');
2275       *     define('SECURE_AUTH_SALT', '!=oLUTXh,QW=H `}`L|9/^4-3 STz},T(w}W<I`.JjPi)<Bmf1v,HpGe}T1:Xt7n');
2276       *     define('LOGGED_IN_SALT',   '+XSqHc;@Q*K_b|Z?NC[3H!!EONbh.n<+=uKR:>*c(u`g~EJBf#8u#R{mUEZrozmm');
2277       *     define('NONCE_SALT',       'h`GXHhD>SLWVfg1(1(N{;.V!MoE(SfbA_ksP@&`+AycHcAV$+?@3q+rxV{%^VyKT');
2278       *
2279       * Salting passwords helps against tools which has stored hashed values of
2280       * common dictionary strings. The added values makes it harder to crack.
2281       *
2282       * @since 2.5.0
2283       *
2284       * @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php
2285       *
2286       * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce)
2287       * @return string Salt value
2288       */
2289  	function wp_salt( $scheme = 'auth' ) {
2290          static $cached_salts = array();
2291          if ( isset( $cached_salts[ $scheme ] ) ) {
2292              /**
2293               * Filters the WordPress salt.
2294               *
2295               * @since 2.5.0
2296               *
2297               * @param string $cached_salt Cached salt for the given scheme.
2298               * @param string $scheme      Authentication scheme. Values include 'auth',
2299               *                            'secure_auth', 'logged_in', and 'nonce'.
2300               */
2301              return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
2302          }
2303  
2304          static $duplicated_keys;
2305          if ( null === $duplicated_keys ) {
2306              $duplicated_keys = array( 'put your unique phrase here' => true );
2307              foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) {
2308                  foreach ( array( 'KEY', 'SALT' ) as $second ) {
2309                      if ( ! defined( "{$first}_{$second}" ) ) {
2310                          continue;
2311                      }
2312                      $value                     = constant( "{$first}_{$second}" );
2313                      $duplicated_keys[ $value ] = isset( $duplicated_keys[ $value ] );
2314                  }
2315              }
2316          }
2317  
2318          $values = array(
2319              'key'  => '',
2320              'salt' => '',
2321          );
2322          if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) ) {
2323              $values['key'] = SECRET_KEY;
2324          }
2325          if ( 'auth' === $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) ) {
2326              $values['salt'] = SECRET_SALT;
2327          }
2328  
2329          if ( in_array( $scheme, array( 'auth', 'secure_auth', 'logged_in', 'nonce' ), true ) ) {
2330              foreach ( array( 'key', 'salt' ) as $type ) {
2331                  $const = strtoupper( "{$scheme}_{$type}" );
2332                  if ( defined( $const ) && constant( $const ) && empty( $duplicated_keys[ constant( $const ) ] ) ) {
2333                      $values[ $type ] = constant( $const );
2334                  } elseif ( ! $values[ $type ] ) {
2335                      $values[ $type ] = get_site_option( "{$scheme}_{$type}" );
2336                      if ( ! $values[ $type ] ) {
2337                          $values[ $type ] = wp_generate_password( 64, true, true );
2338                          update_site_option( "{$scheme}_{$type}", $values[ $type ] );
2339                      }
2340                  }
2341              }
2342          } else {
2343              if ( ! $values['key'] ) {
2344                  $values['key'] = get_site_option( 'secret_key' );
2345                  if ( ! $values['key'] ) {
2346                      $values['key'] = wp_generate_password( 64, true, true );
2347                      update_site_option( 'secret_key', $values['key'] );
2348                  }
2349              }
2350              $values['salt'] = hash_hmac( 'md5', $scheme, $values['key'] );
2351          }
2352  
2353          $cached_salts[ $scheme ] = $values['key'] . $values['salt'];
2354  
2355          /** This filter is documented in wp-includes/pluggable.php */
2356          return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
2357      }
2358  endif;
2359  
2360  if ( ! function_exists( 'wp_hash' ) ) :
2361      /**
2362       * Get hash of given string.
2363       *
2364       * @since 2.0.3
2365       *
2366       * @param string $data   Plain text to hash
2367       * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce)
2368       * @return string Hash of $data
2369       */
2370  	function wp_hash( $data, $scheme = 'auth' ) {
2371          $salt = wp_salt( $scheme );
2372  
2373          return hash_hmac( 'md5', $data, $salt );
2374      }
2375  endif;
2376  
2377  if ( ! function_exists( 'wp_hash_password' ) ) :
2378      /**
2379       * Create a hash (encrypt) of a plain text password.
2380       *
2381       * For integration with other applications, this function can be overwritten to
2382       * instead use the other package password checking algorithm.
2383       *
2384       * @since 2.5.0
2385       *
2386       * @global PasswordHash $wp_hasher PHPass object
2387       *
2388       * @param string $password Plain text user password to hash
2389       * @return string The hash string of the password
2390       */
2391  	function wp_hash_password( $password ) {
2392          global $wp_hasher;
2393  
2394          if ( empty( $wp_hasher ) ) {
2395              require_once  ABSPATH . WPINC . '/class-phpass.php';
2396              // By default, use the portable hash from phpass.
2397              $wp_hasher = new PasswordHash( 8, true );
2398          }
2399  
2400          return $wp_hasher->HashPassword( trim( $password ) );
2401      }
2402  endif;
2403  
2404  if ( ! function_exists( 'wp_check_password' ) ) :
2405      /**
2406       * Checks the plaintext password against the encrypted Password.
2407       *
2408       * Maintains compatibility between old version and the new cookie authentication
2409       * protocol using PHPass library. The $hash parameter is the encrypted password
2410       * and the function compares the plain text password when encrypted similarly
2411       * against the already encrypted password to see if they match.
2412       *
2413       * For integration with other applications, this function can be overwritten to
2414       * instead use the other package password checking algorithm.
2415       *
2416       * @since 2.5.0
2417       *
2418       * @global PasswordHash $wp_hasher PHPass object used for checking the password
2419       *                                 against the $hash + $password
2420       * @uses PasswordHash::CheckPassword
2421       *
2422       * @param string     $password Plaintext user's password
2423       * @param string     $hash     Hash of the user's password to check against.
2424       * @param string|int $user_id  Optional. User ID.
2425       * @return bool False, if the $password does not match the hashed password
2426       */
2427  	function wp_check_password( $password, $hash, $user_id = '' ) {
2428          global $wp_hasher;
2429  
2430          // If the hash is still md5...
2431          if ( strlen( $hash ) <= 32 ) {
2432              $check = hash_equals( $hash, md5( $password ) );
2433              if ( $check && $user_id ) {
2434                  // Rehash using new hash.
2435                  wp_set_password( $password, $user_id );
2436                  $hash = wp_hash_password( $password );
2437              }
2438  
2439              /**
2440               * Filters whether the plaintext password matches the encrypted password.
2441               *
2442               * @since 2.5.0
2443               *
2444               * @param bool       $check    Whether the passwords match.
2445               * @param string     $password The plaintext password.
2446               * @param string     $hash     The hashed password.
2447               * @param string|int $user_id  User ID. Can be empty.
2448               */
2449              return apply_filters( 'check_password', $check, $password, $hash, $user_id );
2450          }
2451  
2452          // If the stored hash is longer than an MD5,
2453          // presume the new style phpass portable hash.
2454          if ( empty( $wp_hasher ) ) {
2455              require_once  ABSPATH . WPINC . '/class-phpass.php';
2456              // By default, use the portable hash from phpass.
2457              $wp_hasher = new PasswordHash( 8, true );
2458          }
2459  
2460          $check = $wp_hasher->CheckPassword( $password, $hash );
2461  
2462          /** This filter is documented in wp-includes/pluggable.php */
2463          return apply_filters( 'check_password', $check, $password, $hash, $user_id );
2464      }
2465  endif;
2466  
2467  if ( ! function_exists( 'wp_generate_password' ) ) :
2468      /**
2469       * Generates a random password drawn from the defined set of characters.
2470       *
2471       * Uses wp_rand() is used to create passwords with far less predictability
2472       * than similar native PHP functions like `rand()` or `mt_rand()`.
2473       *
2474       * @since 2.5.0
2475       *
2476       * @param int  $length              Optional. The length of password to generate. Default 12.
2477       * @param bool $special_chars       Optional. Whether to include standard special characters.
2478       *                                  Default true.
2479       * @param bool $extra_special_chars Optional. Whether to include other special characters.
2480       *                                  Used when generating secret keys and salts. Default false.
2481       * @return string The random password.
2482       */
2483  	function wp_generate_password( $length = 12, $special_chars = true, $extra_special_chars = false ) {
2484          $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
2485          if ( $special_chars ) {
2486              $chars .= '!@#$%^&*()';
2487          }
2488          if ( $extra_special_chars ) {
2489              $chars .= '-_ []{}<>~`+=,.;:/?|';
2490          }
2491  
2492          $password = '';
2493          for ( $i = 0; $i < $length; $i++ ) {
2494              $password .= substr( $chars, wp_rand( 0, strlen( $chars ) - 1 ), 1 );
2495          }
2496  
2497          /**
2498           * Filters the randomly-generated password.
2499           *
2500           * @since 3.0.0
2501           * @since 5.3.0 Added the `$length`, `$special_chars`, and `$extra_special_chars` parameters.
2502           *
2503           * @param string $password            The generated password.
2504           * @param int    $length              The length of password to generate.
2505           * @param bool   $special_chars       Whether to include standard special characters.
2506           * @param bool   $extra_special_chars Whether to include other special characters.
2507           */
2508          return apply_filters( 'random_password', $password, $length, $special_chars, $extra_special_chars );
2509      }
2510  endif;
2511  
2512  if ( ! function_exists( 'wp_rand' ) ) :
2513      /**
2514       * Generates a random number.
2515       *
2516       * @since 2.6.2
2517       * @since 4.4.0 Uses PHP7 random_int() or the random_compat library if available.
2518       *
2519       * @global string $rnd_value
2520       *
2521       * @param int $min Lower limit for the generated number
2522       * @param int $max Upper limit for the generated number
2523       * @return int A random number between min and max
2524       */
2525  	function wp_rand( $min = 0, $max = 0 ) {
2526          global $rnd_value;
2527  
2528          // Some misconfigured 32-bit environments (Entropy PHP, for example)
2529          // truncate integers larger than PHP_INT_MAX to PHP_INT_MAX rather than overflowing them to floats.
2530          $max_random_number = 3000000000 === 2147483647 ? (float) '4294967295' : 4294967295; // 4294967295 = 0xffffffff
2531  
2532          // We only handle ints, floats are truncated to their integer value.
2533          $min = (int) $min;
2534          $max = (int) $max;
2535  
2536          // Use PHP's CSPRNG, or a compatible method.
2537          static $use_random_int_functionality = true;
2538          if ( $use_random_int_functionality ) {
2539              try {
2540                  $_max = ( 0 != $max ) ? $max : $max_random_number;
2541                  // wp_rand() can accept arguments in either order, PHP cannot.
2542                  $_max = max( $min, $_max );
2543                  $_min = min( $min, $_max );
2544                  $val  = random_int( $_min, $_max );
2545                  if ( false !== $val ) {
2546                      return absint( $val );
2547                  } else {
2548                      $use_random_int_functionality = false;
2549                  }
2550              } catch ( Error $e ) {
2551                  $use_random_int_functionality = false;
2552              } catch ( Exception $e ) {
2553                  $use_random_int_functionality = false;
2554              }
2555          }
2556  
2557          // Reset $rnd_value after 14 uses.
2558          // 32 (md5) + 40 (sha1) + 40 (sha1) / 8 = 14 random numbers from $rnd_value.
2559          if ( strlen( $rnd_value ) < 8 ) {
2560              if ( defined( 'WP_SETUP_CONFIG' ) ) {
2561                  static $seed = '';
2562              } else {
2563                  $seed = get_transient( 'random_seed' );
2564              }
2565              $rnd_value  = md5( uniqid( microtime() . mt_rand(), true ) . $seed );
2566              $rnd_value .= sha1( $rnd_value );
2567              $rnd_value .= sha1( $rnd_value . $seed );
2568              $seed       = md5( $seed . $rnd_value );
2569              if ( ! defined( 'WP_SETUP_CONFIG' ) && ! defined( 'WP_INSTALLING' ) ) {
2570                  set_transient( 'random_seed', $seed );
2571              }
2572          }
2573  
2574          // Take the first 8 digits for our value.
2575          $value = substr( $rnd_value, 0, 8 );
2576  
2577          // Strip the first eight, leaving the remainder for the next call to wp_rand().
2578          $rnd_value = substr( $rnd_value, 8 );
2579  
2580          $value = abs( hexdec( $value ) );
2581  
2582          // Reduce the value to be within the min - max range.
2583          if ( 0 != $max ) {
2584              $value = $min + ( $max - $min + 1 ) * $value / ( $max_random_number + 1 );
2585          }
2586  
2587          return abs( (int) $value );
2588      }
2589  endif;
2590  
2591  if ( ! function_exists( 'wp_set_password' ) ) :
2592      /**
2593       * Updates the user's password with a new encrypted one.
2594       *
2595       * For integration with other applications, this function can be overwritten to
2596       * instead use the other package password checking algorithm.
2597       *
2598       * Please note: This function should be used sparingly and is really only meant for single-time
2599       * application. Leveraging this improperly in a plugin or theme could result in an endless loop
2600       * of password resets if precautions are not taken to ensure it does not execute on every page load.
2601       *
2602       * @since 2.5.0
2603       *
2604       * @global wpdb $wpdb WordPress database abstraction object.
2605       *
2606       * @param string $password The plaintext new user password
2607       * @param int    $user_id  User ID
2608       */
2609  	function wp_set_password( $password, $user_id ) {
2610          global $wpdb;
2611  
2612          $hash = wp_hash_password( $password );
2613          $wpdb->update(
2614              $wpdb->users,
2615              array(
2616                  'user_pass'           => $hash,
2617                  'user_activation_key' => '',
2618              ),
2619              array( 'ID' => $user_id )
2620          );
2621  
2622          clean_user_cache( $user_id );
2623      }
2624  endif;
2625  
2626  if ( ! function_exists( 'get_avatar' ) ) :
2627      /**
2628       * Retrieve the avatar `<img>` tag for a user, email address, MD5 hash, comment, or post.
2629       *
2630       * @since 2.5.0
2631       * @since 4.2.0 Optional `$args` parameter added.
2632       *
2633       * @param mixed  $id_or_email The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash,
2634       *                            user email, WP_User object, WP_Post object, or WP_Comment object.
2635       * @param int    $size        Optional. Height and width of the avatar image file in pixels. Default 96.
2636       * @param string $default     Optional. URL for the default image or a default type. Accepts '404'
2637       *                            (return a 404 instead of a default image), 'retro' (8bit), 'monsterid'
2638       *                            (monster), 'wavatar' (cartoon face), 'indenticon' (the "quilt"),
2639       *                            'mystery', 'mm', or 'mysteryman' (The Oyster Man), 'blank' (transparent GIF),
2640       *                            or 'gravatar_default' (the Gravatar logo). Default is the value of the
2641       *                            'avatar_default' option, with a fallback of 'mystery'.
2642       * @param string $alt         Optional. Alternative text to use in img tag. Default empty.
2643       * @param array  $args {
2644       *     Optional. Extra arguments to retrieve the avatar.
2645       *
2646       *     @type int          $height        Display height of the avatar in pixels. Defaults to $size.
2647       *     @type int          $width         Display width of the avatar in pixels. Defaults to $size.
2648       *     @type bool         $force_default Whether to always show the default image, never the Gravatar. Default false.
2649       *     @type string       $rating        What rating to display avatars up to. Accepts 'G', 'PG', 'R', 'X', and are
2650       *                                       judged in that order. Default is the value of the 'avatar_rating' option.
2651       *     @type string       $scheme        URL scheme to use. See set_url_scheme() for accepted values.
2652       *                                       Default null.
2653       *     @type array|string $class         Array or string of additional classes to add to the img element.
2654       *                                       Default null.
2655       *     @type bool         $force_display Whether to always show the avatar - ignores the show_avatars option.
2656       *                                       Default false.
2657       *     @type string       $loading       Value for the `loading` attribute.
2658       *                                       Default null.
2659       *     @type string       $extra_attr    HTML attributes to insert in the IMG element. Is not sanitized. Default empty.
2660       * }
2661       * @return string|false `<img>` tag for the user's avatar. False on failure.
2662       */
2663  	function get_avatar( $id_or_email, $size = 96, $default = '', $alt = '', $args = null ) {
2664          $defaults = array(
2665              // get_avatar_data() args.
2666              'size'          => 96,
2667              'height'        => null,
2668              'width'         => null,
2669              'default'       => get_option( 'avatar_default', 'mystery' ),
2670              'force_default' => false,
2671              'rating'        => get_option( 'avatar_rating' ),
2672              'scheme'        => null,
2673              'alt'           => '',
2674              'class'         => null,
2675              'force_display' => false,
2676              'loading'       => null,
2677              'extra_attr'    => '',
2678          );
2679  
2680          if ( wp_lazy_loading_enabled( 'img', 'get_avatar' ) ) {
2681              $defaults['loading'] = 'lazy';
2682          }
2683  
2684          if ( empty( $args ) ) {
2685              $args = array();
2686          }
2687  
2688          $args['size']    = (int) $size;
2689          $args['default'] = $default;
2690          $args['alt']     = $alt;
2691  
2692          $args = wp_parse_args( $args, $defaults );
2693  
2694          if ( empty( $args['height'] ) ) {
2695              $args['height'] = $args['size'];
2696          }
2697          if ( empty( $args['width'] ) ) {
2698              $args['width'] = $args['size'];
2699          }
2700  
2701          if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) {
2702              $id_or_email = get_comment( $id_or_email );
2703          }
2704  
2705          /**
2706           * Allows the HTML for a user's avatar to be returned early.
2707           *
2708           * Passing a non-null value will effectively short-circuit get_avatar(), passing
2709           * the value through the {@see 'get_avatar'} filter and returning early.
2710           *
2711           * @since 4.2.0
2712           *
2713           * @param string|null $avatar      HTML for the user's avatar. Default null.
2714           * @param mixed       $id_or_email The avatar to retrieve. Accepts a user_id, Gravatar MD5 hash,
2715           *                                 user email, WP_User object, WP_Post object, or WP_Comment object.
2716           * @param array       $args        Arguments passed to get_avatar_url(), after processing.
2717           */
2718          $avatar = apply_filters( 'pre_get_avatar', null, $id_or_email, $args );
2719  
2720          if ( ! is_null( $avatar ) ) {
2721              /** This filter is documented in wp-includes/pluggable.php */
2722              return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
2723          }
2724  
2725          if ( ! $args['force_display'] && ! get_option( 'show_avatars' ) ) {
2726              return false;
2727          }
2728  
2729          $url2x = get_avatar_url( $id_or_email, array_merge( $args, array( 'size' => $args['size'] * 2 ) ) );
2730  
2731          $args = get_avatar_data( $id_or_email, $args );
2732  
2733          $url = $args['url'];
2734  
2735          if ( ! $url || is_wp_error( $url ) ) {
2736              return false;
2737          }
2738  
2739          $class = array( 'avatar', 'avatar-' . (int) $args['size'], 'photo' );
2740  
2741          if ( ! $args['found_avatar'] || $args['force_default'] ) {
2742              $class[] = 'avatar-default';
2743          }
2744  
2745          if ( $args['class'] ) {
2746              if ( is_array( $args['class'] ) ) {
2747                  $class = array_merge( $class, $args['class'] );
2748              } else {
2749                  $class[] = $args['class'];
2750              }
2751          }
2752  
2753          // Add `loading` attribute.
2754          $extra_attr = $args['extra_attr'];
2755          $loading    = $args['loading'];
2756  
2757          if ( in_array( $loading, array( 'lazy', 'eager' ), true ) && ! preg_match( '/\bloading\s*=/', $extra_attr ) ) {
2758              if ( ! empty( $extra_attr ) ) {
2759                  $extra_attr .= ' ';
2760              }
2761  
2762              $extra_attr .= "loading='{$loading}'";
2763          }
2764  
2765          $avatar = sprintf(
2766              "<img alt='%s' src='%s' srcset='%s' class='%s' height='%d' width='%d' %s/>",
2767              esc_attr( $args['alt'] ),
2768              esc_url( $url ),
2769              esc_url( $url2x ) . ' 2x',
2770              esc_attr( implode( ' ', $class ) ),
2771              (int) $args['height'],
2772              (int) $args['width'],
2773              $extra_attr
2774          );
2775  
2776          /**
2777           * Filters the HTML for a user's avatar.
2778           *
2779           * @since 2.5.0
2780           * @since 4.2.0 The `$args` parameter was added.
2781           *
2782           * @param string $avatar      HTML for the user's avatar.
2783           * @param mixed  $id_or_email The avatar to retrieve. Accepts a user_id, Gravatar MD5 hash,
2784           *                            user email, WP_User object, WP_Post object, or WP_Comment object.
2785           * @param int    $size        Square avatar width and height in pixels to retrieve.
2786           * @param string $default     URL for the default image or a default type. Accepts '404', 'retro', 'monsterid',
2787           *                            'wavatar', 'indenticon', 'mystery', 'mm', 'mysteryman', 'blank', or 'gravatar_default'.
2788           * @param string $alt         Alternative text to use in the avatar image tag.
2789           * @param array  $args        Arguments passed to get_avatar_data(), after processing.
2790           */
2791          return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
2792      }
2793  endif;
2794  
2795  if ( ! function_exists( 'wp_text_diff' ) ) :
2796      /**
2797       * Displays a human readable HTML representation of the difference between two strings.
2798       *
2799       * The Diff is available for getting the changes between versions. The output is
2800       * HTML, so the primary use is for displaying the changes. If the two strings
2801       * are equivalent, then an empty string will be returned.
2802       *
2803       * @since 2.6.0
2804       *
2805       * @see wp_parse_args() Used to change defaults to user defined settings.
2806       * @uses Text_Diff
2807       * @uses WP_Text_Diff_Renderer_Table
2808       *
2809       * @param string       $left_string  "old" (left) version of string
2810       * @param string       $right_string "new" (right) version of string
2811       * @param string|array $args {
2812       *     Associative array of options to pass to WP_Text_Diff_Renderer_Table().
2813       *
2814       *     @type string $title           Titles the diff in a manner compatible
2815       *                                   with the output. Default empty.
2816       *     @type string $title_left      Change the HTML to the left of the title.
2817       *                                   Default empty.
2818       *     @type string $title_right     Change the HTML to the right of the title.
2819       *                                   Default empty.
2820       *     @type bool   $show_split_view True for split view (two columns), false for
2821       *                                   un-split view (single column). Default true.
2822       * }
2823       * @return string Empty string if strings are equivalent or HTML with differences.
2824       */
2825  	function wp_text_diff( $left_string, $right_string, $args = null ) {
2826          $defaults = array(
2827              'title'           => '',
2828              'title_left'      => '',
2829              'title_right'     => '',
2830              'show_split_view' => true,
2831          );
2832          $args     = wp_parse_args( $args, $defaults );
2833  
2834          if ( ! class_exists( 'WP_Text_Diff_Renderer_Table', false ) ) {
2835              require  ABSPATH . WPINC . '/wp-diff.php';
2836          }
2837  
2838          $left_string  = normalize_whitespace( $left_string );
2839          $right_string = normalize_whitespace( $right_string );
2840  
2841          $left_lines  = explode( "\n", $left_string );
2842          $right_lines = explode( "\n", $right_string );
2843          $text_diff   = new Text_Diff( $left_lines, $right_lines );
2844          $renderer    = new WP_Text_Diff_Renderer_Table( $args );
2845          $diff        = $renderer->render( $text_diff );
2846  
2847          if ( ! $diff ) {
2848              return '';
2849          }
2850  
2851          $is_split_view       = ! empty( $args['show_split_view'] );
2852          $is_split_view_class = $is_split_view ? ' is-split-view' : '';
2853  
2854          $r = "<table class='diff$is_split_view_class'>\n";
2855  
2856          if ( $args['title'] ) {
2857              $r .= "<caption class='diff-title'>$args[title]</caption>\n";
2858          }
2859  
2860          if ( $args['title_left'] || $args['title_right'] ) {
2861              $r .= '<thead>';
2862          }
2863  
2864          if ( $args['title_left'] || $args['title_right'] ) {
2865              $th_or_td_left  = empty( $args['title_left'] ) ? 'td' : 'th';
2866              $th_or_td_right = empty( $args['title_right'] ) ? 'td' : 'th';
2867  
2868              $r .= "<tr class='diff-sub-title'>\n";
2869              $r .= "\t<$th_or_td_left>$args[title_left]</$th_or_td_left>\n";
2870              if ( $is_split_view ) {
2871                  $r .= "\t<$th_or_td_right>$args[title_right]</$th_or_td_right>\n";
2872              }
2873              $r .= "</tr>\n";
2874          }
2875  
2876          if ( $args['title_left'] || $args['title_right'] ) {
2877              $r .= "</thead>\n";
2878          }
2879  
2880          $r .= "<tbody>\n$diff\n</tbody>\n";
2881          $r .= '</table>';
2882  
2883          return $r;
2884      }
2885  endif;


Generated: Fri Jul 30 01:00:09 2021 Cross-referenced by PHPXref 0.7.1