[ Index ]

PHP Cross Reference of WordPress

title

Body

[close]

/wp-content/themes/twentythirteen/ -> functions.php (source)

   1  <?php
   2  /**
   3   * Twenty Thirteen functions and definitions
   4   *
   5   * Sets up the theme and provides some helper functions, which are used in the
   6   * theme as custom template tags. Others are attached to action and filter
   7   * hooks in WordPress to change core functionality.
   8   *
   9   * When using a child theme you can override certain functions (those wrapped
  10   * in a function_exists() call) by defining them first in your child theme's
  11   * functions.php file. The child theme's functions.php file is included before
  12   * the parent theme's file, so the child theme functions would be used.
  13   *
  14   * @link https://developer.wordpress.org/themes/basics/theme-functions/
  15   * @link https://developer.wordpress.org/themes/advanced-topics/child-themes/
  16   *
  17   * Functions that are not pluggable (not wrapped in function_exists()) are
  18   * instead attached to a filter or action hook.
  19   *
  20   * For more information on hooks, actions, and filters, @link https://developer.wordpress.org/plugins/
  21   *
  22   * @package WordPress
  23   * @subpackage Twenty_Thirteen
  24   * @since Twenty Thirteen 1.0
  25   */
  26  
  27  /*
  28   * Set up the content width value based on the theme's design.
  29   *
  30   * @see twentythirteen_content_width() for template-specific adjustments.
  31   */
  32  if ( ! isset( $content_width ) ) {
  33      $content_width = 604;
  34  }
  35  
  36  /**
  37   * Add support for a custom header image.
  38   */
  39  require get_template_directory() . '/inc/custom-header.php';
  40  
  41  /**
  42   * Twenty Thirteen only works in WordPress 3.6 or later.
  43   */
  44  if ( version_compare( $GLOBALS['wp_version'], '3.6-alpha', '<' ) ) {
  45      require get_template_directory() . '/inc/back-compat.php';
  46  }
  47  
  48  /**
  49   * Block Patterns.
  50   *
  51   * @since Twenty Thirteen 3.4
  52   */
  53  require get_template_directory() . '/inc/block-patterns.php';
  54  
  55  /**
  56   * Twenty Thirteen setup.
  57   *
  58   * Sets up theme defaults and registers the various WordPress features that
  59   * Twenty Thirteen supports.
  60   *
  61   * @uses load_theme_textdomain() For translation/localization support.
  62   * @uses add_editor_style() To add Visual Editor stylesheets.
  63   * @uses add_theme_support() To add support for automatic feed links, post
  64   * formats, and post thumbnails.
  65   * @uses register_nav_menu() To add support for a navigation menu.
  66   * @uses set_post_thumbnail_size() To set a custom post thumbnail size.
  67   *
  68   * @since Twenty Thirteen 1.0
  69   */
  70  function twentythirteen_setup() {
  71      /*
  72       * Makes Twenty Thirteen available for translation.
  73       *
  74       * Translations can be filed at WordPress.org. See: https://translate.wordpress.org/projects/wp-themes/twentythirteen
  75       * If you're building a theme based on Twenty Thirteen, use a find and
  76       * replace to change 'twentythirteen' to the name of your theme in all
  77       * template files.
  78       */
  79      load_theme_textdomain( 'twentythirteen' );
  80  
  81      /*
  82       * This theme styles the visual editor to resemble the theme style,
  83       * specifically font, colors, icons, and column width.
  84       */
  85      add_editor_style( array( 'css/editor-style.css', 'genericons/genericons.css', twentythirteen_fonts_url() ) );
  86  
  87      // Load regular editor styles into the new block-based editor.
  88      add_theme_support( 'editor-styles' );
  89  
  90      // Load default block styles.
  91      add_theme_support( 'wp-block-styles' );
  92  
  93      // Add support for full and wide align images.
  94      add_theme_support( 'align-wide' );
  95  
  96      // Add support for responsive embeds.
  97      add_theme_support( 'responsive-embeds' );
  98  
  99      // Add support for custom color scheme.
 100      add_theme_support(
 101          'editor-color-palette',
 102          array(
 103              array(
 104                  'name'  => __( 'Dark Gray', 'twentythirteen' ),
 105                  'slug'  => 'dark-gray',
 106                  'color' => '#141412',
 107              ),
 108              array(
 109                  'name'  => __( 'Red', 'twentythirteen' ),
 110                  'slug'  => 'red',
 111                  'color' => '#bc360a',
 112              ),
 113              array(
 114                  'name'  => __( 'Medium Orange', 'twentythirteen' ),
 115                  'slug'  => 'medium-orange',
 116                  'color' => '#db572f',
 117              ),
 118              array(
 119                  'name'  => __( 'Light Orange', 'twentythirteen' ),
 120                  'slug'  => 'light-orange',
 121                  'color' => '#ea9629',
 122              ),
 123              array(
 124                  'name'  => __( 'Yellow', 'twentythirteen' ),
 125                  'slug'  => 'yellow',
 126                  'color' => '#fbca3c',
 127              ),
 128              array(
 129                  'name'  => __( 'White', 'twentythirteen' ),
 130                  'slug'  => 'white',
 131                  'color' => '#fff',
 132              ),
 133              array(
 134                  'name'  => __( 'Dark Brown', 'twentythirteen' ),
 135                  'slug'  => 'dark-brown',
 136                  'color' => '#220e10',
 137              ),
 138              array(
 139                  'name'  => __( 'Medium Brown', 'twentythirteen' ),
 140                  'slug'  => 'medium-brown',
 141                  'color' => '#722d19',
 142              ),
 143              array(
 144                  'name'  => __( 'Light Brown', 'twentythirteen' ),
 145                  'slug'  => 'light-brown',
 146                  'color' => '#eadaa6',
 147              ),
 148              array(
 149                  'name'  => __( 'Beige', 'twentythirteen' ),
 150                  'slug'  => 'beige',
 151                  'color' => '#e8e5ce',
 152              ),
 153              array(
 154                  'name'  => __( 'Off-white', 'twentythirteen' ),
 155                  'slug'  => 'off-white',
 156                  'color' => '#f7f5e7',
 157              ),
 158          )
 159      );
 160  
 161      // Add support for block gradient colors.
 162      add_theme_support(
 163          'editor-gradient-presets',
 164          array(
 165              array(
 166                  'name'     => __( 'Autumn Brown', 'twentythirteen' ),
 167                  'gradient' => 'linear-gradient(135deg, rgba(226,45,15,1) 0%, rgba(158,25,13,1) 100%)',
 168                  'slug'     => 'autumn-brown',
 169              ),
 170              array(
 171                  'name'     => __( 'Sunset Yellow', 'twentythirteen' ),
 172                  'gradient' => 'linear-gradient(135deg, rgba(233,139,41,1) 0%, rgba(238,179,95,1) 100%)',
 173                  'slug'     => 'sunset-yellow',
 174              ),
 175              array(
 176                  'name'     => __( 'Light Sky', 'twentythirteen' ),
 177                  'gradient' => 'linear-gradient(135deg,rgba(228,228,228,1.0) 0%,rgba(208,225,252,1.0) 100%)',
 178                  'slug'     => 'light-sky',
 179              ),
 180              array(
 181                  'name'     => __( 'Dark Sky', 'twentythirteen' ),
 182                  'gradient' => 'linear-gradient(135deg,rgba(0,0,0,1.0) 0%,rgba(56,61,69,1.0) 100%)',
 183                  'slug'     => 'dark-sky',
 184              ),
 185          )
 186      );
 187  
 188      // Adds RSS feed links to <head> for posts and comments.
 189      add_theme_support( 'automatic-feed-links' );
 190  
 191      /*
 192       * Switches default core markup for search form, comment form,
 193       * and comments to output valid HTML5.
 194       */
 195      add_theme_support(
 196          'html5',
 197          array(
 198              'search-form',
 199              'comment-form',
 200              'comment-list',
 201              'gallery',
 202              'caption',
 203              'script',
 204              'style',
 205              'navigation-widgets',
 206          )
 207      );
 208  
 209      /*
 210       * This theme supports all available post formats by default.
 211       * See https://wordpress.org/support/article/post-formats/
 212       */
 213      add_theme_support(
 214          'post-formats',
 215          array(
 216              'aside',
 217              'audio',
 218              'chat',
 219              'gallery',
 220              'image',
 221              'link',
 222              'quote',
 223              'status',
 224              'video',
 225          )
 226      );
 227  
 228      // This theme uses wp_nav_menu() in one location.
 229      register_nav_menu( 'primary', __( 'Navigation Menu', 'twentythirteen' ) );
 230  
 231      /*
 232       * This theme uses a custom image size for featured images, displayed on
 233       * "standard" posts and pages.
 234       */
 235      add_theme_support( 'post-thumbnails' );
 236      set_post_thumbnail_size( 604, 270, true );
 237  
 238      // This theme uses its own gallery styles.
 239      add_filter( 'use_default_gallery_style', '__return_false' );
 240  
 241      // Indicate widget sidebars can use selective refresh in the Customizer.
 242      add_theme_support( 'customize-selective-refresh-widgets' );
 243  }
 244  add_action( 'after_setup_theme', 'twentythirteen_setup' );
 245  
 246  /**
 247   * Return the Google font stylesheet URL, if available.
 248   *
 249   * The use of Source Sans Pro and Bitter by default is localized. For languages
 250   * that use characters not supported by the font, the font can be disabled.
 251   *
 252   * @since Twenty Thirteen 1.0
 253   *
 254   * @return string Font stylesheet or empty string if disabled.
 255   */
 256  function twentythirteen_fonts_url() {
 257      $fonts_url = '';
 258  
 259      /*
 260       * translators: If there are characters in your language that are not supported
 261       * by Source Sans Pro, translate this to 'off'. Do not translate into your own language.
 262       */
 263      $source_sans_pro = _x( 'on', 'Source Sans Pro font: on or off', 'twentythirteen' );
 264  
 265      /*
 266       * translators: If there are characters in your language that are not supported
 267       * by Bitter, translate this to 'off'. Do not translate into your own language.
 268       */
 269      $bitter = _x( 'on', 'Bitter font: on or off', 'twentythirteen' );
 270  
 271      if ( 'off' !== $source_sans_pro || 'off' !== $bitter ) {
 272          $font_families = array();
 273  
 274          if ( 'off' !== $source_sans_pro ) {
 275              $font_families[] = 'Source Sans Pro:300,400,700,300italic,400italic,700italic';
 276          }
 277  
 278          if ( 'off' !== $bitter ) {
 279              $font_families[] = 'Bitter:400,700';
 280          }
 281  
 282          $query_args = array(
 283              'family'  => urlencode( implode( '|', $font_families ) ),
 284              'subset'  => urlencode( 'latin,latin-ext' ),
 285              'display' => urlencode( 'fallback' ),
 286          );
 287          $fonts_url  = add_query_arg( $query_args, 'https://fonts.googleapis.com/css' );
 288      }
 289  
 290      return $fonts_url;
 291  }
 292  
 293  /**
 294   * Enqueue scripts and styles for the front end.
 295   *
 296   * @since Twenty Thirteen 1.0
 297   */
 298  function twentythirteen_scripts_styles() {
 299      /*
 300       * Adds JavaScript to pages with the comment form to support
 301       * sites with threaded comments (when in use).
 302       */
 303      if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
 304          wp_enqueue_script( 'comment-reply' );
 305      }
 306  
 307      // Adds Masonry to handle vertical alignment of footer widgets.
 308      if ( is_active_sidebar( 'sidebar-1' ) ) {
 309          wp_enqueue_script( 'jquery-masonry' );
 310      }
 311  
 312      // Loads JavaScript file with functionality specific to Twenty Thirteen.
 313      wp_enqueue_script( 'twentythirteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20171218', true );
 314  
 315      // Add Source Sans Pro and Bitter fonts, used in the main stylesheet.
 316      wp_enqueue_style( 'twentythirteen-fonts', twentythirteen_fonts_url(), array(), null );
 317  
 318      // Add Genericons font, used in the main stylesheet.
 319      wp_enqueue_style( 'genericons', get_template_directory_uri() . '/genericons/genericons.css', array(), '3.0.3' );
 320  
 321      // Loads our main stylesheet.
 322      wp_enqueue_style( 'twentythirteen-style', get_stylesheet_uri(), array(), '20201208' );
 323  
 324      // Theme block stylesheet.
 325      wp_enqueue_style( 'twentythirteen-block-style', get_template_directory_uri() . '/css/blocks.css', array( 'twentythirteen-style' ), '20190102' );
 326  
 327      // Loads the Internet Explorer specific stylesheet.
 328      wp_enqueue_style( 'twentythirteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentythirteen-style' ), '20150214' );
 329      wp_style_add_data( 'twentythirteen-ie', 'conditional', 'lt IE 9' );
 330  }
 331  add_action( 'wp_enqueue_scripts', 'twentythirteen_scripts_styles' );
 332  
 333  /**
 334   * Add preconnect for Google Fonts.
 335   *
 336   * @since Twenty Thirteen 2.1
 337   *
 338   * @param array   $urls          URLs to print for resource hints.
 339   * @param string  $relation_type The relation type the URLs are printed.
 340   * @return array URLs to print for resource hints.
 341   */
 342  function twentythirteen_resource_hints( $urls, $relation_type ) {
 343      if ( wp_style_is( 'twentythirteen-fonts', 'queue' ) && 'preconnect' === $relation_type ) {
 344          if ( version_compare( $GLOBALS['wp_version'], '4.7-alpha', '>=' ) ) {
 345              $urls[] = array(
 346                  'href' => 'https://fonts.gstatic.com',
 347                  'crossorigin',
 348              );
 349          } else {
 350              $urls[] = 'https://fonts.gstatic.com';
 351          }
 352      }
 353  
 354      return $urls;
 355  }
 356  add_filter( 'wp_resource_hints', 'twentythirteen_resource_hints', 10, 2 );
 357  
 358  /**
 359   * Enqueue styles for the block-based editor.
 360   *
 361   * @since Twenty Thirteen 2.5
 362   */
 363  function twentythirteen_block_editor_styles() {
 364      // Block styles.
 365      wp_enqueue_style( 'twentythirteen-block-editor-style', get_template_directory_uri() . '/css/editor-blocks.css', array(), '20201208' );
 366      // Add custom fonts.
 367      wp_enqueue_style( 'twentythirteen-fonts', twentythirteen_fonts_url(), array(), null );
 368  }
 369  add_action( 'enqueue_block_editor_assets', 'twentythirteen_block_editor_styles' );
 370  
 371  /**
 372   * Filter the page title.
 373   *
 374   * Creates a nicely formatted and more specific title element text for output
 375   * in head of document, based on current view.
 376   *
 377   * @since Twenty Thirteen 1.0
 378   *
 379   * @param string $title Default title text for current view.
 380   * @param string $sep   Optional separator.
 381   * @return string The filtered title.
 382   */
 383  function twentythirteen_wp_title( $title, $sep ) {
 384      global $paged, $page;
 385  
 386      if ( is_feed() ) {
 387          return $title;
 388      }
 389  
 390      // Add the site name.
 391      $title .= get_bloginfo( 'name', 'display' );
 392  
 393      // Add the site description for the home/front page.
 394      $site_description = get_bloginfo( 'description', 'display' );
 395      if ( $site_description && ( is_home() || is_front_page() ) ) {
 396          $title = "$title $sep $site_description";
 397      }
 398  
 399      // Add a page number if necessary.
 400      if ( ( $paged >= 2 || $page >= 2 ) && ! is_404() ) {
 401          /* translators: %s: Page number. */
 402          $title = "$title $sep " . sprintf( __( 'Page %s', 'twentythirteen' ), max( $paged, $page ) );
 403      }
 404  
 405      return $title;
 406  }
 407  add_filter( 'wp_title', 'twentythirteen_wp_title', 10, 2 );
 408  
 409  /**
 410   * Register two widget areas.
 411   *
 412   * @since Twenty Thirteen 1.0
 413   */
 414  function twentythirteen_widgets_init() {
 415      register_sidebar(
 416          array(
 417              'name'          => __( 'Main Widget Area', 'twentythirteen' ),
 418              'id'            => 'sidebar-1',
 419              'description'   => __( 'Appears in the footer section of the site.', 'twentythirteen' ),
 420              'before_widget' => '<aside id="%1$s" class="widget %2$s">',
 421              'after_widget'  => '</aside>',
 422              'before_title'  => '<h3 class="widget-title">',
 423              'after_title'   => '</h3>',
 424          )
 425      );
 426  
 427      register_sidebar(
 428          array(
 429              'name'          => __( 'Secondary Widget Area', 'twentythirteen' ),
 430              'id'            => 'sidebar-2',
 431              'description'   => __( 'Appears on posts and pages in the sidebar.', 'twentythirteen' ),
 432              'before_widget' => '<aside id="%1$s" class="widget %2$s">',
 433              'after_widget'  => '</aside>',
 434              'before_title'  => '<h3 class="widget-title">',
 435              'after_title'   => '</h3>',
 436          )
 437      );
 438  }
 439  add_action( 'widgets_init', 'twentythirteen_widgets_init' );
 440  
 441  if ( ! function_exists( 'wp_get_list_item_separator' ) ) :
 442      /**
 443       * Retrieves the list item separator based on the locale.
 444       *
 445       * Added for backward compatibility to support pre-6.0.0 WordPress versions.
 446       *
 447       * @since 6.0.0
 448       */
 449  	function wp_get_list_item_separator() {
 450          /* translators: Used between list items, there is a space after the comma. */
 451          return __( ', ', 'twentythirteen' );
 452      }
 453  endif;
 454  
 455  if ( ! function_exists( 'twentythirteen_paging_nav' ) ) :
 456      /**
 457       * Display navigation to next/previous set of posts when applicable.
 458       *
 459       * @since Twenty Thirteen 1.0
 460       */
 461  	function twentythirteen_paging_nav() {
 462          global $wp_query;
 463  
 464          // Don't print empty markup if there's only one page.
 465          if ( $wp_query->max_num_pages < 2 ) {
 466              return;
 467          }
 468          ?>
 469          <nav class="navigation paging-navigation">
 470          <h1 class="screen-reader-text"><?php _e( 'Posts navigation', 'twentythirteen' ); ?></h1>
 471          <div class="nav-links">
 472  
 473              <?php if ( get_next_posts_link() ) : ?>
 474              <div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">&larr;</span> Older posts', 'twentythirteen' ) ); ?></div>
 475              <?php endif; ?>
 476  
 477              <?php if ( get_previous_posts_link() ) : ?>
 478              <div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">&rarr;</span>', 'twentythirteen' ) ); ?></div>
 479              <?php endif; ?>
 480  
 481          </div><!-- .nav-links -->
 482      </nav><!-- .navigation -->
 483          <?php
 484      }
 485  endif;
 486  
 487  if ( ! function_exists( 'twentythirteen_post_nav' ) ) :
 488      /**
 489       * Display navigation to next/previous post when applicable.
 490       *
 491       * @since Twenty Thirteen 1.0
 492       */
 493  	function twentythirteen_post_nav() {
 494          global $post;
 495  
 496          // Don't print empty markup if there's nowhere to navigate.
 497          $previous = ( is_attachment() ) ? get_post( $post->post_parent ) : get_adjacent_post( false, '', true );
 498          $next     = get_adjacent_post( false, '', false );
 499  
 500          if ( ! $next && ! $previous ) {
 501              return;
 502          }
 503          ?>
 504          <nav class="navigation post-navigation">
 505          <h1 class="screen-reader-text"><?php _e( 'Post navigation', 'twentythirteen' ); ?></h1>
 506          <div class="nav-links">
 507  
 508              <?php previous_post_link( '%link', _x( '<span class="meta-nav">&larr;</span> %title', 'Previous post link', 'twentythirteen' ) ); ?>
 509              <?php next_post_link( '%link', _x( '%title <span class="meta-nav">&rarr;</span>', 'Next post link', 'twentythirteen' ) ); ?>
 510  
 511          </div><!-- .nav-links -->
 512      </nav><!-- .navigation -->
 513          <?php
 514      }
 515  endif;
 516  
 517  if ( ! function_exists( 'twentythirteen_entry_meta' ) ) :
 518      /**
 519       * Print HTML with meta information for current post: categories, tags, permalink, author, and date.
 520       *
 521       * Create your own twentythirteen_entry_meta() to override in a child theme.
 522       *
 523       * @since Twenty Thirteen 1.0
 524       */
 525  	function twentythirteen_entry_meta() {
 526          if ( is_sticky() && is_home() && ! is_paged() ) {
 527              echo '<span class="featured-post">' . esc_html__( 'Sticky', 'twentythirteen' ) . '</span>';
 528          }
 529  
 530          if ( ! has_post_format( 'link' ) && 'post' === get_post_type() ) {
 531              twentythirteen_entry_date();
 532          }
 533  
 534          $categories_list = get_the_category_list( wp_get_list_item_separator() );
 535          if ( $categories_list ) {
 536              echo '<span class="categories-links">' . $categories_list . '</span>';
 537          }
 538  
 539          $tags_list = get_the_tag_list( '', wp_get_list_item_separator() );
 540          if ( $tags_list && ! is_wp_error( $tags_list ) ) {
 541              echo '<span class="tags-links">' . $tags_list . '</span>';
 542          }
 543  
 544          // Post author.
 545          if ( 'post' === get_post_type() ) {
 546              printf(
 547                  '<span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s" rel="author">%3$s</a></span>',
 548                  esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
 549                  /* translators: %s: Author display name. */
 550                  esc_attr( sprintf( __( 'View all posts by %s', 'twentythirteen' ), get_the_author() ) ),
 551                  get_the_author()
 552              );
 553          }
 554      }
 555  endif;
 556  
 557  if ( ! function_exists( 'twentythirteen_entry_date' ) ) :
 558      /**
 559       * Print HTML with date information for current post.
 560       *
 561       * Create your own twentythirteen_entry_date() to override in a child theme.
 562       *
 563       * @since Twenty Thirteen 1.0
 564       *
 565       * @param bool $display (optional) Whether to display the date. Default true.
 566       * @return string The HTML-formatted post date.
 567       */
 568  	function twentythirteen_entry_date( $display = true ) {
 569          if ( has_post_format( array( 'chat', 'status' ) ) ) {
 570              /* translators: 1: Post format name, 2: Date. */
 571              $format_prefix = _x( '%1$s on %2$s', '1: post format name. 2: date', 'twentythirteen' );
 572          } else {
 573              $format_prefix = '%2$s';
 574          }
 575  
 576          $date = sprintf(
 577              '<span class="date"><a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date" datetime="%3$s">%4$s</time></a></span>',
 578              esc_url( get_permalink() ),
 579              /* translators: %s: Post title. */
 580              esc_attr( sprintf( __( 'Permalink to %s', 'twentythirteen' ), the_title_attribute( 'echo=0' ) ) ),
 581              esc_attr( get_the_date( 'c' ) ),
 582              esc_html( sprintf( $format_prefix, get_post_format_string( get_post_format() ), get_the_date() ) )
 583          );
 584  
 585          if ( $display ) {
 586              echo $date;
 587          }
 588  
 589          return $date;
 590      }
 591  endif;
 592  
 593  if ( ! function_exists( 'twentythirteen_the_attached_image' ) ) :
 594      /**
 595       * Print the attached image with a link to the next attached image.
 596       *
 597       * @since Twenty Thirteen 1.0
 598       */
 599  	function twentythirteen_the_attached_image() {
 600          /**
 601           * Filters the image attachment size to use.
 602           *
 603           * @since Twenty thirteen 1.0
 604           *
 605           * @param array $size {
 606           *     @type int The attachment height in pixels.
 607           *     @type int The attachment width in pixels.
 608           * }
 609           */
 610          $attachment_size     = apply_filters( 'twentythirteen_attachment_size', array( 724, 724 ) );
 611          $next_attachment_url = wp_get_attachment_url();
 612          $post                = get_post();
 613  
 614          /*
 615           * Grab the IDs of all the image attachments in a gallery so we can get the URL
 616           * of the next adjacent image in a gallery, or the first image (if we're
 617           * looking at the last image in a gallery), or, in a gallery of one, just the
 618           * link to that image file.
 619           */
 620          $attachment_ids = get_posts(
 621              array(
 622                  'post_parent'    => $post->post_parent,
 623                  'fields'         => 'ids',
 624                  'numberposts'    => -1,
 625                  'post_status'    => 'inherit',
 626                  'post_type'      => 'attachment',
 627                  'post_mime_type' => 'image',
 628                  'order'          => 'ASC',
 629                  'orderby'        => 'menu_order ID',
 630              )
 631          );
 632  
 633          // If there is more than 1 attachment in a gallery...
 634          if ( count( $attachment_ids ) > 1 ) {
 635              foreach ( $attachment_ids as $idx => $attachment_id ) {
 636                  if ( $attachment_id == $post->ID ) {
 637                      $next_id = $attachment_ids[ ( $idx + 1 ) % count( $attachment_ids ) ];
 638                      break;
 639                  }
 640              }
 641  
 642              if ( $next_id ) {
 643                  // ...get the URL of the next image attachment.
 644                  $next_attachment_url = get_attachment_link( $next_id );
 645              } else {
 646                  // ...or get the URL of the first image attachment.
 647                  $next_attachment_url = get_attachment_link( reset( $attachment_ids ) );
 648              }
 649          }
 650  
 651          printf(
 652              '<a href="%1$s" title="%2$s" rel="attachment">%3$s</a>',
 653              esc_url( $next_attachment_url ),
 654              the_title_attribute( array( 'echo' => false ) ),
 655              wp_get_attachment_image( $post->ID, $attachment_size )
 656          );
 657      }
 658  endif;
 659  
 660  /**
 661   * Return the post URL.
 662   *
 663   * @uses get_url_in_content() to get the URL in the post meta (if it exists) or
 664   * the first link found in the post content.
 665   *
 666   * Falls back to the post permalink if no URL is found in the post.
 667   *
 668   * @since Twenty Thirteen 1.0
 669   *
 670   * @return string The Link format URL.
 671   */
 672  function twentythirteen_get_link_url() {
 673      $content = get_the_content();
 674      $has_url = get_url_in_content( $content );
 675  
 676      return ( $has_url ) ? $has_url : apply_filters( 'the_permalink', get_permalink() );
 677  }
 678  
 679  if ( ! function_exists( 'twentythirteen_excerpt_more' ) && ! is_admin() ) :
 680      /**
 681       * Replaces "[...]" (appended to automatically generated excerpts) with ...
 682       * and a Continue reading link.
 683       *
 684       * @since Twenty Thirteen 1.4
 685       *
 686       * @param string $more Default Read More excerpt link.
 687       * @return string Filtered Read More excerpt link.
 688       */
 689  	function twentythirteen_excerpt_more( $more ) {
 690          $link = sprintf(
 691              '<a href="%1$s" class="more-link">%2$s</a>',
 692              esc_url( get_permalink( get_the_ID() ) ),
 693              /* translators: %s: Post title. Only visible to screen readers. */
 694              sprintf( __( 'Continue reading %s <span class="meta-nav">&rarr;</span>', 'twentythirteen' ), '<span class="screen-reader-text">' . get_the_title( get_the_ID() ) . '</span>' )
 695          );
 696          return ' &hellip; ' . $link;
 697      }
 698      add_filter( 'excerpt_more', 'twentythirteen_excerpt_more' );
 699  endif;
 700  
 701  /**
 702   * Extend the default WordPress body classes.
 703   *
 704   * Adds body classes to denote:
 705   * 1. Single or multiple authors.
 706   * 2. Active widgets in the sidebar to change the layout and spacing.
 707   * 3. When avatars are disabled in discussion settings.
 708   *
 709   * @since Twenty Thirteen 1.0
 710   *
 711   * @param array $classes A list of existing body class values.
 712   * @return array The filtered body class list.
 713   */
 714  function twentythirteen_body_class( $classes ) {
 715      if ( ! is_multi_author() ) {
 716          $classes[] = 'single-author';
 717      }
 718  
 719      if ( is_active_sidebar( 'sidebar-2' ) && ! is_attachment() && ! is_404() ) {
 720          $classes[] = 'sidebar';
 721      }
 722  
 723      if ( ! get_option( 'show_avatars' ) ) {
 724          $classes[] = 'no-avatars';
 725      }
 726  
 727      return $classes;
 728  }
 729  add_filter( 'body_class', 'twentythirteen_body_class' );
 730  
 731  /**
 732   * Adjust content_width value for video post formats and attachment templates.
 733   *
 734   * @since Twenty Thirteen 1.0
 735   */
 736  function twentythirteen_content_width() {
 737      global $content_width;
 738  
 739      if ( is_attachment() ) {
 740          $content_width = 724;
 741      } elseif ( has_post_format( 'audio' ) ) {
 742          $content_width = 484;
 743      }
 744  }
 745  add_action( 'template_redirect', 'twentythirteen_content_width' );
 746  
 747  /**
 748   * Add postMessage support for site title and description for the Customizer.
 749   *
 750   * @since Twenty Thirteen 1.0
 751   *
 752   * @param WP_Customize_Manager $wp_customize Customizer object.
 753   */
 754  function twentythirteen_customize_register( $wp_customize ) {
 755      $wp_customize->get_setting( 'blogname' )->transport         = 'postMessage';
 756      $wp_customize->get_setting( 'blogdescription' )->transport  = 'postMessage';
 757      $wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage';
 758  
 759      if ( isset( $wp_customize->selective_refresh ) ) {
 760          $wp_customize->selective_refresh->add_partial(
 761              'blogname',
 762              array(
 763                  'selector'            => '.site-title',
 764                  'container_inclusive' => false,
 765                  'render_callback'     => 'twentythirteen_customize_partial_blogname',
 766              )
 767          );
 768          $wp_customize->selective_refresh->add_partial(
 769              'blogdescription',
 770              array(
 771                  'selector'            => '.site-description',
 772                  'container_inclusive' => false,
 773                  'render_callback'     => 'twentythirteen_customize_partial_blogdescription',
 774              )
 775          );
 776      }
 777  }
 778  add_action( 'customize_register', 'twentythirteen_customize_register' );
 779  
 780  /**
 781   * Render the site title for the selective refresh partial.
 782   *
 783   * @since Twenty Thirteen 1.9
 784   *
 785   * @see twentythirteen_customize_register()
 786   *
 787   * @return void
 788   */
 789  function twentythirteen_customize_partial_blogname() {
 790      bloginfo( 'name' );
 791  }
 792  
 793  /**
 794   * Render the site tagline for the selective refresh partial.
 795   *
 796   * @since Twenty Thirteen 1.9
 797   *
 798   * @see twentythirteen_customize_register()
 799   *
 800   * @return void
 801   */
 802  function twentythirteen_customize_partial_blogdescription() {
 803      bloginfo( 'description' );
 804  }
 805  
 806  /**
 807   * Enqueue JavaScript postMessage handlers for the Customizer.
 808   *
 809   * Binds JavaScript handlers to make the Customizer preview
 810   * reload changes asynchronously.
 811   *
 812   * @since Twenty Thirteen 1.0
 813   */
 814  function twentythirteen_customize_preview_js() {
 815      wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20141120', true );
 816  }
 817  add_action( 'customize_preview_init', 'twentythirteen_customize_preview_js' );
 818  
 819  /**
 820   * Modifies tag cloud widget arguments to display all tags in the same font size
 821   * and use list format for better accessibility.
 822   *
 823   * @since Twenty Thirteen 2.3
 824   *
 825   * @param array $args Arguments for tag cloud widget.
 826   * @return array The filtered arguments for tag cloud widget.
 827   */
 828  function twentythirteen_widget_tag_cloud_args( $args ) {
 829      $args['largest']  = 22;
 830      $args['smallest'] = 8;
 831      $args['unit']     = 'pt';
 832      $args['format']   = 'list';
 833  
 834      return $args;
 835  }
 836  add_filter( 'widget_tag_cloud_args', 'twentythirteen_widget_tag_cloud_args' );
 837  
 838  /**
 839   * Prevents `author-bio.php` partial template from interfering with rendering
 840   * an author archive of a user with the `bio` username.
 841   *
 842   * @since Twenty Thirteen 3.0
 843   *
 844   * @param string $template Template file.
 845   * @return string Replacement template file.
 846   */
 847  function twentythirteen_author_bio_template( $template ) {
 848      if ( is_author() ) {
 849          $author = get_queried_object();
 850          if ( $author instanceof WP_User && 'bio' === $author->user_nicename ) {
 851              // Use author templates if exist, fall back to template hierarchy otherwise.
 852              return locate_template( array( "author-{$author->ID}.php", 'author.php' ) );
 853          }
 854      }
 855  
 856      return $template;
 857  }
 858  add_filter( 'author_template', 'twentythirteen_author_bio_template' );
 859  
 860  if ( ! function_exists( 'wp_body_open' ) ) :
 861      /**
 862       * Fire the wp_body_open action.
 863       *
 864       * Added for backward compatibility to support pre-5.2.0 WordPress versions.
 865       *
 866       * @since Twenty Thirteen 2.8
 867       */
 868  	function wp_body_open() {
 869          /**
 870           * Triggered after the opening <body> tag.
 871           *
 872           * @since Twenty Thirteen 2.8
 873           */
 874          do_action( 'wp_body_open' );
 875      }
 876  endif;
 877  
 878  /**
 879   * Register Custom Block Styles
 880   *
 881   * @since Twenty Thirteen 3.4
 882   */
 883  if ( function_exists( 'register_block_style' ) ) {
 884  	function twentythirteen_register_block_styles() {
 885  
 886          /**
 887           * Register block style
 888           */
 889          register_block_style(
 890              'core/button',
 891              array(
 892                  'name'         => 'no-shadow',
 893                  'label'        => __( 'No Shadow', 'twentythirteen' ),
 894                  'style_handle' => 'no-shadow',
 895              )
 896          );
 897      }
 898      add_action( 'init', 'twentythirteen_register_block_styles' );
 899  }


Generated: Fri May 20 01:00:02 2022 Cross-referenced by PHPXref 0.7.1