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/wp-admin/includes/ -> theme.php (source)

   1  <?php
   2  /**
   3   * WordPress Theme Administration API
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   */
   8  
   9  /**
  10   * Removes a theme.
  11   *
  12   * @since 2.8.0
  13   *
  14   * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
  15   *
  16   * @param string $stylesheet Stylesheet of the theme to delete.
  17   * @param string $redirect   Redirect to page when complete.
  18   * @return bool|null|WP_Error True on success, false if `$stylesheet` is empty, WP_Error on failure.
  19   *                            Null if filesystem credentials are required to proceed.
  20   */
  21  function delete_theme( $stylesheet, $redirect = '' ) {
  22      global $wp_filesystem;
  23  
  24      if ( empty( $stylesheet ) ) {
  25          return false;
  26      }
  27  
  28      if ( empty( $redirect ) ) {
  29          $redirect = wp_nonce_url( 'themes.php?action=delete&stylesheet=' . urlencode( $stylesheet ), 'delete-theme_' . $stylesheet );
  30      }
  31  
  32      ob_start();
  33      $credentials = request_filesystem_credentials( $redirect );
  34      $data        = ob_get_clean();
  35  
  36      if ( false === $credentials ) {
  37          if ( ! empty( $data ) ) {
  38              require_once  ABSPATH . 'wp-admin/admin-header.php';
  39              echo $data;
  40              require_once  ABSPATH . 'wp-admin/admin-footer.php';
  41              exit;
  42          }
  43          return;
  44      }
  45  
  46      if ( ! WP_Filesystem( $credentials ) ) {
  47          ob_start();
  48          // Failed to connect. Error and request again.
  49          request_filesystem_credentials( $redirect, '', true );
  50          $data = ob_get_clean();
  51  
  52          if ( ! empty( $data ) ) {
  53              require_once  ABSPATH . 'wp-admin/admin-header.php';
  54              echo $data;
  55              require_once  ABSPATH . 'wp-admin/admin-footer.php';
  56              exit;
  57          }
  58          return;
  59      }
  60  
  61      if ( ! is_object( $wp_filesystem ) ) {
  62          return new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
  63      }
  64  
  65      if ( is_wp_error( $wp_filesystem->errors ) && $wp_filesystem->errors->has_errors() ) {
  66          return new WP_Error( 'fs_error', __( 'Filesystem error.' ), $wp_filesystem->errors );
  67      }
  68  
  69      // Get the base theme folder.
  70      $themes_dir = $wp_filesystem->wp_themes_dir();
  71      if ( empty( $themes_dir ) ) {
  72          return new WP_Error( 'fs_no_themes_dir', __( 'Unable to locate WordPress theme directory.' ) );
  73      }
  74  
  75      /**
  76       * Fires immediately before a theme deletion attempt.
  77       *
  78       * @since 5.8.0
  79       *
  80       * @param string $stylesheet Stylesheet of the theme to delete.
  81       */
  82      do_action( 'delete_theme', $stylesheet );
  83  
  84      $theme = wp_get_theme( $stylesheet );
  85  
  86      $themes_dir = trailingslashit( $themes_dir );
  87      $theme_dir  = trailingslashit( $themes_dir . $stylesheet );
  88      $deleted    = $wp_filesystem->delete( $theme_dir, true );
  89  
  90      /**
  91       * Fires immediately after a theme deletion attempt.
  92       *
  93       * @since 5.8.0
  94       *
  95       * @param string $stylesheet Stylesheet of the theme to delete.
  96       * @param bool   $deleted    Whether the theme deletion was successful.
  97       */
  98      do_action( 'deleted_theme', $stylesheet, $deleted );
  99  
 100      if ( ! $deleted ) {
 101          return new WP_Error(
 102              'could_not_remove_theme',
 103              /* translators: %s: Theme name. */
 104              sprintf( __( 'Could not fully remove the theme %s.' ), $stylesheet )
 105          );
 106      }
 107  
 108      $theme_translations = wp_get_installed_translations( 'themes' );
 109  
 110      // Remove language files, silently.
 111      if ( ! empty( $theme_translations[ $stylesheet ] ) ) {
 112          $translations = $theme_translations[ $stylesheet ];
 113  
 114          foreach ( $translations as $translation => $data ) {
 115              $wp_filesystem->delete( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '.po' );
 116              $wp_filesystem->delete( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '.mo' );
 117              $wp_filesystem->delete( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '.l10n.php' );
 118  
 119              $json_translation_files = glob( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '-*.json' );
 120              if ( $json_translation_files ) {
 121                  array_map( array( $wp_filesystem, 'delete' ), $json_translation_files );
 122              }
 123          }
 124      }
 125  
 126      // Remove the theme from allowed themes on the network.
 127      if ( is_multisite() ) {
 128          WP_Theme::network_disable_theme( $stylesheet );
 129      }
 130  
 131      // Clear theme caches.
 132      $theme->cache_delete();
 133  
 134      // Force refresh of theme update information.
 135      delete_site_transient( 'update_themes' );
 136  
 137      return true;
 138  }
 139  
 140  /**
 141   * Gets the page templates available in this theme.
 142   *
 143   * @since 1.5.0
 144   * @since 4.7.0 Added the `$post_type` parameter.
 145   *
 146   * @param WP_Post|null $post      Optional. The post being edited, provided for context.
 147   * @param string       $post_type Optional. Post type to get the templates for. Default 'page'.
 148   * @return string[] Array of template file names keyed by the template header name.
 149   */
 150  function get_page_templates( $post = null, $post_type = 'page' ) {
 151      return array_flip( wp_get_theme()->get_page_templates( $post, $post_type ) );
 152  }
 153  
 154  /**
 155   * Tidies a filename for url display by the theme file editor.
 156   *
 157   * @since 2.9.0
 158   * @access private
 159   *
 160   * @param string $fullpath Full path to the theme file
 161   * @param string $containingfolder Path of the theme parent folder
 162   * @return string
 163   */
 164  function _get_template_edit_filename( $fullpath, $containingfolder ) {
 165      return str_replace( dirname( $containingfolder, 2 ), '', $fullpath );
 166  }
 167  
 168  /**
 169   * Check if there is an update for a theme available.
 170   *
 171   * Will display link, if there is an update available.
 172   *
 173   * @since 2.7.0
 174   *
 175   * @see get_theme_update_available()
 176   *
 177   * @param WP_Theme $theme Theme data object.
 178   */
 179  function theme_update_available( $theme ) {
 180      echo get_theme_update_available( $theme );
 181  }
 182  
 183  /**
 184   * Retrieves the update link if there is a theme update available.
 185   *
 186   * Will return a link if there is an update available.
 187   *
 188   * @since 3.8.0
 189   *
 190   * @param WP_Theme $theme WP_Theme object.
 191   * @return string|false HTML for the update link, or false if invalid info was passed.
 192   */
 193  function get_theme_update_available( $theme ) {
 194      static $themes_update = null;
 195  
 196      if ( ! current_user_can( 'update_themes' ) ) {
 197          return false;
 198      }
 199  
 200      if ( ! isset( $themes_update ) ) {
 201          $themes_update = get_site_transient( 'update_themes' );
 202      }
 203  
 204      if ( ! ( $theme instanceof WP_Theme ) ) {
 205          return false;
 206      }
 207  
 208      $stylesheet = $theme->get_stylesheet();
 209  
 210      $html = '';
 211  
 212      if ( isset( $themes_update->response[ $stylesheet ] ) ) {
 213          $update      = $themes_update->response[ $stylesheet ];
 214          $theme_name  = $theme->display( 'Name' );
 215          $details_url = add_query_arg(
 216              array(
 217                  'TB_iframe' => 'true',
 218                  'width'     => 1024,
 219                  'height'    => 800,
 220              ),
 221              $update['url']
 222          ); // Theme browser inside WP? Replace this. Also, theme preview JS will override this on the available list.
 223          $update_url  = wp_nonce_url( admin_url( 'update.php?action=upgrade-theme&amp;theme=' . urlencode( $stylesheet ) ), 'upgrade-theme_' . $stylesheet );
 224  
 225          if ( ! is_multisite() ) {
 226              if ( ! current_user_can( 'update_themes' ) ) {
 227                  $html = sprintf(
 228                      /* translators: 1: Theme name, 2: Theme details URL, 3: Additional link attributes, 4: Version number. */
 229                      '<p><strong>' . __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a>.' ) . '</strong></p>',
 230                      $theme_name,
 231                      esc_url( $details_url ),
 232                      sprintf(
 233                          'class="thickbox open-plugin-details-modal" aria-label="%s"',
 234                          /* translators: 1: Theme name, 2: Version number. */
 235                          esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $theme_name, $update['new_version'] ) )
 236                      ),
 237                      $update['new_version']
 238                  );
 239              } elseif ( empty( $update['package'] ) ) {
 240                  $html = sprintf(
 241                      /* translators: 1: Theme name, 2: Theme details URL, 3: Additional link attributes, 4: Version number. */
 242                      '<p><strong>' . __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a>. <em>Automatic update is unavailable for this theme.</em>' ) . '</strong></p>',
 243                      $theme_name,
 244                      esc_url( $details_url ),
 245                      sprintf(
 246                          'class="thickbox open-plugin-details-modal" aria-label="%s"',
 247                          /* translators: 1: Theme name, 2: Version number. */
 248                          esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $theme_name, $update['new_version'] ) )
 249                      ),
 250                      $update['new_version']
 251                  );
 252              } else {
 253                  $html = sprintf(
 254                      /* translators: 1: Theme name, 2: Theme details URL, 3: Additional link attributes, 4: Version number, 5: Update URL, 6: Additional link attributes. */
 255                      '<p><strong>' . __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a> or <a href="%5$s" %6$s>update now</a>.' ) . '</strong></p>',
 256                      $theme_name,
 257                      esc_url( $details_url ),
 258                      sprintf(
 259                          'class="thickbox open-plugin-details-modal" aria-label="%s"',
 260                          /* translators: 1: Theme name, 2: Version number. */
 261                          esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $theme_name, $update['new_version'] ) )
 262                      ),
 263                      $update['new_version'],
 264                      $update_url,
 265                      sprintf(
 266                          'aria-label="%s" id="update-theme" data-slug="%s"',
 267                          /* translators: %s: Theme name. */
 268                          esc_attr( sprintf( _x( 'Update %s now', 'theme' ), $theme_name ) ),
 269                          $stylesheet
 270                      )
 271                  );
 272              }
 273          }
 274      }
 275  
 276      return $html;
 277  }
 278  
 279  /**
 280   * Retrieves list of WordPress theme features (aka theme tags).
 281   *
 282   * @since 3.1.0
 283   * @since 3.2.0 Added 'Gray' color and 'Featured Image Header', 'Featured Images',
 284   *              'Full Width Template', and 'Post Formats' features.
 285   * @since 3.5.0 Added 'Flexible Header' feature.
 286   * @since 3.8.0 Renamed 'Width' filter to 'Layout'.
 287   * @since 3.8.0 Renamed 'Fixed Width' and 'Flexible Width' options
 288   *              to 'Fixed Layout' and 'Fluid Layout'.
 289   * @since 3.8.0 Added 'Accessibility Ready' feature and 'Responsive Layout' option.
 290   * @since 3.9.0 Combined 'Layout' and 'Columns' filters.
 291   * @since 4.6.0 Removed 'Colors' filter.
 292   * @since 4.6.0 Added 'Grid Layout' option.
 293   *              Removed 'Fixed Layout', 'Fluid Layout', and 'Responsive Layout' options.
 294   * @since 4.6.0 Added 'Custom Logo' and 'Footer Widgets' features.
 295   *              Removed 'Blavatar' feature.
 296   * @since 4.6.0 Added 'Blog', 'E-Commerce', 'Education', 'Entertainment', 'Food & Drink',
 297   *              'Holiday', 'News', 'Photography', and 'Portfolio' subjects.
 298   *              Removed 'Photoblogging' and 'Seasonal' subjects.
 299   * @since 4.9.0 Reordered the filters from 'Layout', 'Features', 'Subject'
 300   *              to 'Subject', 'Features', 'Layout'.
 301   * @since 4.9.0 Removed 'BuddyPress', 'Custom Menu', 'Flexible Header',
 302   *              'Front Page Posting', 'Microformats', 'RTL Language Support',
 303   *              'Threaded Comments', and 'Translation Ready' features.
 304   * @since 5.5.0 Added 'Block Editor Patterns', 'Block Editor Styles',
 305   *              and 'Full Site Editing' features.
 306   * @since 5.5.0 Added 'Wide Blocks' layout option.
 307   * @since 5.8.1 Added 'Template Editing' feature.
 308   * @since 6.1.1 Replaced 'Full Site Editing' feature name with 'Site Editor'.
 309   * @since 6.2.0 Added 'Style Variations' feature.
 310   *
 311   * @param bool $api Optional. Whether try to fetch tags from the WordPress.org API. Defaults to true.
 312   * @return array Array of features keyed by category with translations keyed by slug.
 313   */
 314  function get_theme_feature_list( $api = true ) {
 315      // Hard-coded list is used if API is not accessible.
 316      $features = array(
 317  
 318          __( 'Subject' )  => array(
 319              'blog'           => __( 'Blog' ),
 320              'e-commerce'     => __( 'E-Commerce' ),
 321              'education'      => __( 'Education' ),
 322              'entertainment'  => __( 'Entertainment' ),
 323              'food-and-drink' => __( 'Food & Drink' ),
 324              'holiday'        => __( 'Holiday' ),
 325              'news'           => __( 'News' ),
 326              'photography'    => __( 'Photography' ),
 327              'portfolio'      => __( 'Portfolio' ),
 328          ),
 329  
 330          __( 'Features' ) => array(
 331              'accessibility-ready'   => __( 'Accessibility Ready' ),
 332              'block-patterns'        => __( 'Block Editor Patterns' ),
 333              'block-styles'          => __( 'Block Editor Styles' ),
 334              'custom-background'     => __( 'Custom Background' ),
 335              'custom-colors'         => __( 'Custom Colors' ),
 336              'custom-header'         => __( 'Custom Header' ),
 337              'custom-logo'           => __( 'Custom Logo' ),
 338              'editor-style'          => __( 'Editor Style' ),
 339              'featured-image-header' => __( 'Featured Image Header' ),
 340              'featured-images'       => __( 'Featured Images' ),
 341              'footer-widgets'        => __( 'Footer Widgets' ),
 342              'full-site-editing'     => __( 'Site Editor' ),
 343              'full-width-template'   => __( 'Full Width Template' ),
 344              'post-formats'          => __( 'Post Formats' ),
 345              'sticky-post'           => __( 'Sticky Post' ),
 346              'style-variations'      => __( 'Style Variations' ),
 347              'template-editing'      => __( 'Template Editing' ),
 348              'theme-options'         => __( 'Theme Options' ),
 349          ),
 350  
 351          __( 'Layout' )   => array(
 352              'grid-layout'   => __( 'Grid Layout' ),
 353              'one-column'    => __( 'One Column' ),
 354              'two-columns'   => __( 'Two Columns' ),
 355              'three-columns' => __( 'Three Columns' ),
 356              'four-columns'  => __( 'Four Columns' ),
 357              'left-sidebar'  => __( 'Left Sidebar' ),
 358              'right-sidebar' => __( 'Right Sidebar' ),
 359              'wide-blocks'   => __( 'Wide Blocks' ),
 360          ),
 361  
 362      );
 363  
 364      if ( ! $api || ! current_user_can( 'install_themes' ) ) {
 365          return $features;
 366      }
 367  
 368      $feature_list = get_site_transient( 'wporg_theme_feature_list' );
 369      if ( ! $feature_list ) {
 370          set_site_transient( 'wporg_theme_feature_list', array(), 3 * HOUR_IN_SECONDS );
 371      }
 372  
 373      if ( ! $feature_list ) {
 374          $feature_list = themes_api( 'feature_list', array() );
 375          if ( is_wp_error( $feature_list ) ) {
 376              return $features;
 377          }
 378      }
 379  
 380      if ( ! $feature_list ) {
 381          return $features;
 382      }
 383  
 384      set_site_transient( 'wporg_theme_feature_list', $feature_list, 3 * HOUR_IN_SECONDS );
 385  
 386      $category_translations = array(
 387          'Layout'   => __( 'Layout' ),
 388          'Features' => __( 'Features' ),
 389          'Subject'  => __( 'Subject' ),
 390      );
 391  
 392      $wporg_features = array();
 393  
 394      // Loop over the wp.org canonical list and apply translations.
 395      foreach ( (array) $feature_list as $feature_category => $feature_items ) {
 396          if ( isset( $category_translations[ $feature_category ] ) ) {
 397              $feature_category = $category_translations[ $feature_category ];
 398          }
 399  
 400          $wporg_features[ $feature_category ] = array();
 401  
 402          foreach ( $feature_items as $feature ) {
 403              if ( isset( $features[ $feature_category ][ $feature ] ) ) {
 404                  $wporg_features[ $feature_category ][ $feature ] = $features[ $feature_category ][ $feature ];
 405              } else {
 406                  $wporg_features[ $feature_category ][ $feature ] = $feature;
 407              }
 408          }
 409      }
 410  
 411      return $wporg_features;
 412  }
 413  
 414  /**
 415   * Retrieves theme installer pages from the WordPress.org Themes API.
 416   *
 417   * It is possible for a theme to override the Themes API result with three
 418   * filters. Assume this is for themes, which can extend on the Theme Info to
 419   * offer more choices. This is very powerful and must be used with care, when
 420   * overriding the filters.
 421   *
 422   * The first filter, {@see 'themes_api_args'}, is for the args and gives the action
 423   * as the second parameter. The hook for {@see 'themes_api_args'} must ensure that
 424   * an object is returned.
 425   *
 426   * The second filter, {@see 'themes_api'}, allows a plugin to override the WordPress.org
 427   * Theme API entirely. If `$action` is 'query_themes', 'theme_information', or 'feature_list',
 428   * an object MUST be passed. If `$action` is 'hot_tags', an array should be passed.
 429   *
 430   * Finally, the third filter, {@see 'themes_api_result'}, makes it possible to filter the
 431   * response object or array, depending on the `$action` type.
 432   *
 433   * Supported arguments per action:
 434   *
 435   * | Argument Name      | 'query_themes' | 'theme_information' | 'hot_tags' | 'feature_list'   |
 436   * | -------------------| :------------: | :-----------------: | :--------: | :--------------: |
 437   * | `$slug`            | No             |  Yes                | No         | No               |
 438   * | `$per_page`        | Yes            |  No                 | No         | No               |
 439   * | `$page`            | Yes            |  No                 | No         | No               |
 440   * | `$number`          | No             |  No                 | Yes        | No               |
 441   * | `$search`          | Yes            |  No                 | No         | No               |
 442   * | `$tag`             | Yes            |  No                 | No         | No               |
 443   * | `$author`          | Yes            |  No                 | No         | No               |
 444   * | `$user`            | Yes            |  No                 | No         | No               |
 445   * | `$browse`          | Yes            |  No                 | No         | No               |
 446   * | `$locale`          | Yes            |  Yes                | No         | No               |
 447   * | `$fields`          | Yes            |  Yes                | No         | No               |
 448   *
 449   * @since 2.8.0
 450   *
 451   * @param string       $action API action to perform: Accepts 'query_themes', 'theme_information',
 452   *                             'hot_tags' or 'feature_list'.
 453   * @param array|object $args   {
 454   *     Optional. Array or object of arguments to serialize for the Themes API. Default empty array.
 455   *
 456   *     @type string  $slug     The theme slug. Default empty.
 457   *     @type int     $per_page Number of themes per page. Default 24.
 458   *     @type int     $page     Number of current page. Default 1.
 459   *     @type int     $number   Number of tags to be queried.
 460   *     @type string  $search   A search term. Default empty.
 461   *     @type string  $tag      Tag to filter themes. Default empty.
 462   *     @type string  $author   Username of an author to filter themes. Default empty.
 463   *     @type string  $user     Username to query for their favorites. Default empty.
 464   *     @type string  $browse   Browse view: 'featured', 'popular', 'updated', 'favorites'.
 465   *     @type string  $locale   Locale to provide context-sensitive results. Default is the value of get_locale().
 466   *     @type array   $fields   {
 467   *         Array of fields which should or should not be returned.
 468   *
 469   *         @type bool $description        Whether to return the theme full description. Default false.
 470   *         @type bool $sections           Whether to return the theme readme sections: description, installation,
 471   *                                        FAQ, screenshots, other notes, and changelog. Default false.
 472   *         @type bool $rating             Whether to return the rating in percent and total number of ratings.
 473   *                                        Default false.
 474   *         @type bool $ratings            Whether to return the number of rating for each star (1-5). Default false.
 475   *         @type bool $downloaded         Whether to return the download count. Default false.
 476   *         @type bool $downloadlink       Whether to return the download link for the package. Default false.
 477   *         @type bool $last_updated       Whether to return the date of the last update. Default false.
 478   *         @type bool $tags               Whether to return the assigned tags. Default false.
 479   *         @type bool $homepage           Whether to return the theme homepage link. Default false.
 480   *         @type bool $screenshots        Whether to return the screenshots. Default false.
 481   *         @type int  $screenshot_count   Number of screenshots to return. Default 1.
 482   *         @type bool $screenshot_url     Whether to return the URL of the first screenshot. Default false.
 483   *         @type bool $photon_screenshots Whether to return the screenshots via Photon. Default false.
 484   *         @type bool $template           Whether to return the slug of the parent theme. Default false.
 485   *         @type bool $parent             Whether to return the slug, name and homepage of the parent theme. Default false.
 486   *         @type bool $versions           Whether to return the list of all available versions. Default false.
 487   *         @type bool $theme_url          Whether to return theme's URL. Default false.
 488   *         @type bool $extended_author    Whether to return nicename or nicename and display name. Default false.
 489   *     }
 490   * }
 491   * @return object|array|WP_Error Response object or array on success, WP_Error on failure. See the
 492   *         {@link https://developer.wordpress.org/reference/functions/themes_api/ function reference article}
 493   *         for more information on the make-up of possible return objects depending on the value of `$action`.
 494   */
 495  function themes_api( $action, $args = array() ) {
 496      if ( is_array( $args ) ) {
 497          $args = (object) $args;
 498      }
 499  
 500      if ( 'query_themes' === $action ) {
 501          if ( ! isset( $args->per_page ) ) {
 502              $args->per_page = 24;
 503          }
 504      }
 505  
 506      if ( ! isset( $args->locale ) ) {
 507          $args->locale = get_user_locale();
 508      }
 509  
 510      if ( ! isset( $args->wp_version ) ) {
 511          $args->wp_version = substr( wp_get_wp_version(), 0, 3 ); // x.y
 512      }
 513  
 514      /**
 515       * Filters arguments used to query for installer pages from the WordPress.org Themes API.
 516       *
 517       * Important: An object MUST be returned to this filter.
 518       *
 519       * @since 2.8.0
 520       *
 521       * @param object $args   Arguments used to query for installer pages from the WordPress.org Themes API.
 522       * @param string $action Requested action. Likely values are 'theme_information',
 523       *                       'feature_list', or 'query_themes'.
 524       */
 525      $args = apply_filters( 'themes_api_args', $args, $action );
 526  
 527      /**
 528       * Filters whether to override the WordPress.org Themes API.
 529       *
 530       * Returning a non-false value will effectively short-circuit the WordPress.org API request.
 531       *
 532       * If `$action` is 'query_themes', 'theme_information', or 'feature_list', an object MUST
 533       * be passed. If `$action` is 'hot_tags', an array should be passed.
 534       *
 535       * @since 2.8.0
 536       *
 537       * @param false|object|array $override Whether to override the WordPress.org Themes API. Default false.
 538       * @param string             $action   Requested action. Likely values are 'theme_information',
 539       *                                    'feature_list', or 'query_themes'.
 540       * @param object             $args     Arguments used to query for installer pages from the Themes API.
 541       */
 542      $res = apply_filters( 'themes_api', false, $action, $args );
 543  
 544      if ( ! $res ) {
 545          $url = 'http://api.wordpress.org/themes/info/1.2/';
 546          $url = add_query_arg(
 547              array(
 548                  'action'  => $action,
 549                  'request' => $args,
 550              ),
 551              $url
 552          );
 553  
 554          $http_url = $url;
 555          $ssl      = wp_http_supports( array( 'ssl' ) );
 556          if ( $ssl ) {
 557              $url = set_url_scheme( $url, 'https' );
 558          }
 559  
 560          $http_args = array(
 561              'timeout'    => 15,
 562              'user-agent' => 'WordPress/' . wp_get_wp_version() . '; ' . home_url( '/' ),
 563          );
 564          $request   = wp_remote_get( $url, $http_args );
 565  
 566          if ( $ssl && is_wp_error( $request ) ) {
 567              if ( ! wp_doing_ajax() ) {
 568                  wp_trigger_error(
 569                      __FUNCTION__,
 570                      sprintf(
 571                          /* translators: %s: Support forums URL. */
 572                          __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
 573                          __( 'https://wordpress.org/support/forums/' )
 574                      ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
 575                      headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
 576                  );
 577              }
 578              $request = wp_remote_get( $http_url, $http_args );
 579          }
 580  
 581          if ( is_wp_error( $request ) ) {
 582              $res = new WP_Error(
 583                  'themes_api_failed',
 584                  sprintf(
 585                      /* translators: %s: Support forums URL. */
 586                      __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
 587                      __( 'https://wordpress.org/support/forums/' )
 588                  ),
 589                  $request->get_error_message()
 590              );
 591          } else {
 592              $res = json_decode( wp_remote_retrieve_body( $request ), true );
 593              if ( is_array( $res ) ) {
 594                  // Object casting is required in order to match the info/1.0 format.
 595                  $res = (object) $res;
 596              } elseif ( null === $res ) {
 597                  $res = new WP_Error(
 598                      'themes_api_failed',
 599                      sprintf(
 600                          /* translators: %s: Support forums URL. */
 601                          __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
 602                          __( 'https://wordpress.org/support/forums/' )
 603                      ),
 604                      wp_remote_retrieve_body( $request )
 605                  );
 606              }
 607  
 608              if ( isset( $res->error ) ) {
 609                  $res = new WP_Error( 'themes_api_failed', $res->error );
 610              }
 611          }
 612  
 613          if ( ! is_wp_error( $res ) ) {
 614              // Back-compat for info/1.2 API, upgrade the theme objects in query_themes to objects.
 615              if ( 'query_themes' === $action ) {
 616                  foreach ( $res->themes as $i => $theme ) {
 617                      $res->themes[ $i ] = (object) $theme;
 618                  }
 619              }
 620  
 621              // Back-compat for info/1.2 API, downgrade the feature_list result back to an array.
 622              if ( 'feature_list' === $action ) {
 623                  $res = (array) $res;
 624              }
 625          }
 626      }
 627  
 628      /**
 629       * Filters the returned WordPress.org Themes API response.
 630       *
 631       * @since 2.8.0
 632       *
 633       * @param array|stdClass|WP_Error $res    WordPress.org Themes API response.
 634       * @param string                  $action Requested action. Likely values are 'theme_information',
 635       *                                        'feature_list', or 'query_themes'.
 636       * @param stdClass                $args   Arguments used to query for installer pages from the WordPress.org Themes API.
 637       */
 638      return apply_filters( 'themes_api_result', $res, $action, $args );
 639  }
 640  
 641  /**
 642   * Prepares themes for JavaScript.
 643   *
 644   * @since 3.8.0
 645   *
 646   * @param WP_Theme[] $themes Optional. Array of theme objects to prepare.
 647   *                           Defaults to all allowed themes.
 648   *
 649   * @return array An associative array of theme data, sorted by name.
 650   */
 651  function wp_prepare_themes_for_js( $themes = null ) {
 652      $current_theme = get_stylesheet();
 653  
 654      /**
 655       * Filters theme data before it is prepared for JavaScript.
 656       *
 657       * Passing a non-empty array will result in wp_prepare_themes_for_js() returning
 658       * early with that value instead.
 659       *
 660       * @since 4.2.0
 661       *
 662       * @param array           $prepared_themes An associative array of theme data. Default empty array.
 663       * @param WP_Theme[]|null $themes          An array of theme objects to prepare, if any.
 664       * @param string          $current_theme   The active theme slug.
 665       */
 666      $prepared_themes = (array) apply_filters( 'pre_prepare_themes_for_js', array(), $themes, $current_theme );
 667  
 668      if ( ! empty( $prepared_themes ) ) {
 669          return $prepared_themes;
 670      }
 671  
 672      // Make sure the active theme is listed first.
 673      $prepared_themes[ $current_theme ] = array();
 674  
 675      if ( null === $themes ) {
 676          $themes = wp_get_themes( array( 'allowed' => true ) );
 677          if ( ! isset( $themes[ $current_theme ] ) ) {
 678              $themes[ $current_theme ] = wp_get_theme();
 679          }
 680      }
 681  
 682      $updates    = array();
 683      $no_updates = array();
 684      if ( ! is_multisite() && current_user_can( 'update_themes' ) ) {
 685          $updates_transient = get_site_transient( 'update_themes' );
 686          if ( isset( $updates_transient->response ) ) {
 687              $updates = $updates_transient->response;
 688          }
 689          if ( isset( $updates_transient->no_update ) ) {
 690              $no_updates = $updates_transient->no_update;
 691          }
 692      }
 693  
 694      WP_Theme::sort_by_name( $themes );
 695  
 696      $parents = array();
 697  
 698      $auto_updates = (array) get_site_option( 'auto_update_themes', array() );
 699  
 700      foreach ( $themes as $theme ) {
 701          $slug         = $theme->get_stylesheet();
 702          $encoded_slug = urlencode( $slug );
 703  
 704          $parent = false;
 705          if ( $theme->parent() ) {
 706              $parent           = $theme->parent();
 707              $parents[ $slug ] = $parent->get_stylesheet();
 708              $parent           = $parent->display( 'Name' );
 709          }
 710  
 711          $customize_action = null;
 712  
 713          $can_edit_theme_options = current_user_can( 'edit_theme_options' );
 714          $can_customize          = current_user_can( 'customize' );
 715          $is_block_theme         = $theme->is_block_theme();
 716  
 717          if ( $is_block_theme && $can_edit_theme_options ) {
 718              $customize_action = admin_url( 'site-editor.php' );
 719              if ( $current_theme !== $slug ) {
 720                  $customize_action = add_query_arg( 'wp_theme_preview', $slug, $customize_action );
 721              }
 722          } elseif ( ! $is_block_theme && $can_customize && $can_edit_theme_options ) {
 723              $customize_action = wp_customize_url( $slug );
 724          }
 725          if ( null !== $customize_action ) {
 726              $customize_action = add_query_arg(
 727                  array(
 728                      'return' => urlencode( sanitize_url( remove_query_arg( wp_removable_query_args(), wp_unslash( $_SERVER['REQUEST_URI'] ) ) ) ),
 729                  ),
 730                  $customize_action
 731              );
 732              $customize_action = esc_url( $customize_action );
 733          }
 734  
 735          $update_requires_wp  = isset( $updates[ $slug ]['requires'] ) ? $updates[ $slug ]['requires'] : null;
 736          $update_requires_php = isset( $updates[ $slug ]['requires_php'] ) ? $updates[ $slug ]['requires_php'] : null;
 737  
 738          $auto_update        = in_array( $slug, $auto_updates, true );
 739          $auto_update_action = $auto_update ? 'disable-auto-update' : 'enable-auto-update';
 740  
 741          if ( isset( $updates[ $slug ] ) ) {
 742              $auto_update_supported      = true;
 743              $auto_update_filter_payload = (object) $updates[ $slug ];
 744          } elseif ( isset( $no_updates[ $slug ] ) ) {
 745              $auto_update_supported      = true;
 746              $auto_update_filter_payload = (object) $no_updates[ $slug ];
 747          } else {
 748              $auto_update_supported = false;
 749              /*
 750               * Create the expected payload for the auto_update_theme filter, this is the same data
 751               * as contained within $updates or $no_updates but used when the Theme is not known.
 752               */
 753              $auto_update_filter_payload = (object) array(
 754                  'theme'        => $slug,
 755                  'new_version'  => $theme->get( 'Version' ),
 756                  'url'          => '',
 757                  'package'      => '',
 758                  'requires'     => $theme->get( 'RequiresWP' ),
 759                  'requires_php' => $theme->get( 'RequiresPHP' ),
 760              );
 761          }
 762  
 763          $auto_update_forced = wp_is_auto_update_forced_for_item( 'theme', null, $auto_update_filter_payload );
 764  
 765          $prepared_themes[ $slug ] = array(
 766              'id'             => $slug,
 767              'name'           => $theme->display( 'Name' ),
 768              'screenshot'     => array( $theme->get_screenshot() ), // @todo Multiple screenshots.
 769              'description'    => $theme->display( 'Description' ),
 770              'author'         => $theme->display( 'Author', false, true ),
 771              'authorAndUri'   => $theme->display( 'Author' ),
 772              'tags'           => $theme->display( 'Tags' ),
 773              'version'        => $theme->get( 'Version' ),
 774              'compatibleWP'   => is_wp_version_compatible( $theme->get( 'RequiresWP' ) ),
 775              'compatiblePHP'  => is_php_version_compatible( $theme->get( 'RequiresPHP' ) ),
 776              'updateResponse' => array(
 777                  'compatibleWP'  => is_wp_version_compatible( $update_requires_wp ),
 778                  'compatiblePHP' => is_php_version_compatible( $update_requires_php ),
 779              ),
 780              'parent'         => $parent,
 781              'active'         => $slug === $current_theme,
 782              'hasUpdate'      => isset( $updates[ $slug ] ),
 783              'hasPackage'     => isset( $updates[ $slug ] ) && ! empty( $updates[ $slug ]['package'] ),
 784              'update'         => get_theme_update_available( $theme ),
 785              'autoupdate'     => array(
 786                  'enabled'   => $auto_update || $auto_update_forced,
 787                  'supported' => $auto_update_supported,
 788                  'forced'    => $auto_update_forced,
 789              ),
 790              'actions'        => array(
 791                  'activate'   => current_user_can( 'switch_themes' ) ? wp_nonce_url( admin_url( 'themes.php?action=activate&amp;stylesheet=' . $encoded_slug ), 'switch-theme_' . $slug ) : null,
 792                  'customize'  => $customize_action,
 793                  'delete'     => ( ! is_multisite() && current_user_can( 'delete_themes' ) ) ? wp_nonce_url( admin_url( 'themes.php?action=delete&amp;stylesheet=' . $encoded_slug ), 'delete-theme_' . $slug ) : null,
 794                  'autoupdate' => wp_is_auto_update_enabled_for_type( 'theme' ) && ! is_multisite() && current_user_can( 'update_themes' )
 795                      ? wp_nonce_url( admin_url( 'themes.php?action=' . $auto_update_action . '&amp;stylesheet=' . $encoded_slug ), 'updates' )
 796                      : null,
 797              ),
 798              'blockTheme'     => $theme->is_block_theme(),
 799          );
 800      }
 801  
 802      // Remove 'delete' action if theme has an active child.
 803      if ( ! empty( $parents ) && array_key_exists( $current_theme, $parents ) ) {
 804          unset( $prepared_themes[ $parents[ $current_theme ] ]['actions']['delete'] );
 805      }
 806  
 807      /**
 808       * Filters the themes prepared for JavaScript, for themes.php.
 809       *
 810       * Could be useful for changing the order, which is by name by default.
 811       *
 812       * @since 3.8.0
 813       *
 814       * @param array $prepared_themes Array of theme data.
 815       */
 816      $prepared_themes = apply_filters( 'wp_prepare_themes_for_js', $prepared_themes );
 817      $prepared_themes = array_values( $prepared_themes );
 818      return array_filter( $prepared_themes );
 819  }
 820  
 821  /**
 822   * Prints JS templates for the theme-browsing UI in the Customizer.
 823   *
 824   * @since 4.2.0
 825   */
 826  function customize_themes_print_templates() {
 827      ?>
 828      <script type="text/html" id="tmpl-customize-themes-details-view">
 829          <div class="theme-backdrop"></div>
 830          <div class="theme-wrap wp-clearfix" role="document">
 831              <div class="theme-header">
 832                  <button type="button" class="left dashicons dashicons-no"><span class="screen-reader-text">
 833                      <?php
 834                      /* translators: Hidden accessibility text. */
 835                      _e( 'Show previous theme' );
 836                      ?>
 837                  </span></button>
 838                  <button type="button" class="right dashicons dashicons-no"><span class="screen-reader-text">
 839                      <?php
 840                      /* translators: Hidden accessibility text. */
 841                      _e( 'Show next theme' );
 842                      ?>
 843                  </span></button>
 844                  <button type="button" class="close dashicons dashicons-no"><span class="screen-reader-text">
 845                      <?php
 846                      /* translators: Hidden accessibility text. */
 847                      _e( 'Close details dialog' );
 848                      ?>
 849                  </span></button>
 850              </div>
 851              <div class="theme-about wp-clearfix">
 852                  <div class="theme-screenshots">
 853                  <# if ( data.screenshot && data.screenshot[0] ) { #>
 854                      <div class="screenshot"><img src="{{ data.screenshot[0] }}?ver={{ data.version }}" alt="" /></div>
 855                  <# } else { #>
 856                      <div class="screenshot blank"></div>
 857                  <# } #>
 858                  </div>
 859  
 860                  <div class="theme-info">
 861                      <# if ( data.active ) { #>
 862                          <span class="current-label"><?php _e( 'Active Theme' ); ?></span>
 863                      <# } #>
 864                      <h2 class="theme-name">{{{ data.name }}}<span class="theme-version">
 865                          <?php
 866                          /* translators: %s: Theme version. */
 867                          printf( __( 'Version: %s' ), '{{ data.version }}' );
 868                          ?>
 869                      </span></h2>
 870                      <h3 class="theme-author">
 871                          <?php
 872                          /* translators: %s: Theme author link. */
 873                          printf( __( 'By %s' ), '{{{ data.authorAndUri }}}' );
 874                          ?>
 875                      </h3>
 876  
 877                      <# if ( data.stars && 0 != data.num_ratings ) { #>
 878                          <div class="theme-rating">
 879                              {{{ data.stars }}}
 880                              <a class="num-ratings" target="_blank" href="{{ data.reviews_url }}">
 881                                  <?php
 882                                  printf(
 883                                      '%1$s <span class="screen-reader-text">%2$s</span>',
 884                                      /* translators: %s: Number of ratings. */
 885                                      sprintf( __( '(%s ratings)' ), '{{ data.num_ratings }}' ),
 886                                      /* translators: Hidden accessibility text. */
 887                                      __( '(opens in a new tab)' )
 888                                  );
 889                                  ?>
 890                              </a>
 891                          </div>
 892                      <# } #>
 893  
 894                      <# if ( data.hasUpdate ) { #>
 895                          <# if ( data.updateResponse.compatibleWP && data.updateResponse.compatiblePHP ) { #>
 896                              <div class="notice notice-warning notice-alt notice-large" data-slug="{{ data.id }}">
 897                                  <h3 class="notice-title"><?php _e( 'Update Available' ); ?></h3>
 898                                  {{{ data.update }}}
 899                              </div>
 900                          <# } else { #>
 901                              <div class="notice notice-error notice-alt notice-large" data-slug="{{ data.id }}">
 902                                  <h3 class="notice-title"><?php _e( 'Update Incompatible' ); ?></h3>
 903                                  <p>
 904                                      <# if ( ! data.updateResponse.compatibleWP && ! data.updateResponse.compatiblePHP ) { #>
 905                                          <?php
 906                                          printf(
 907                                              /* translators: %s: Theme name. */
 908                                              __( 'There is a new version of %s available, but it does not work with your versions of WordPress and PHP.' ),
 909                                              '{{{ data.name }}}'
 910                                          );
 911                                          if ( current_user_can( 'update_core' ) && current_user_can( 'update_php' ) ) {
 912                                              printf(
 913                                                  /* translators: 1: URL to WordPress Updates screen, 2: URL to Update PHP page. */
 914                                                  ' ' . __( '<a href="%1$s">Please update WordPress</a>, and then <a href="%2$s">learn more about updating PHP</a>.' ),
 915                                                  self_admin_url( 'update-core.php' ),
 916                                                  esc_url( wp_get_update_php_url() )
 917                                              );
 918                                              wp_update_php_annotation( '</p><p><em>', '</em>' );
 919                                          } elseif ( current_user_can( 'update_core' ) ) {
 920                                              printf(
 921                                                  /* translators: %s: URL to WordPress Updates screen. */
 922                                                  ' ' . __( '<a href="%s">Please update WordPress</a>.' ),
 923                                                  self_admin_url( 'update-core.php' )
 924                                              );
 925                                          } elseif ( current_user_can( 'update_php' ) ) {
 926                                              printf(
 927                                                  /* translators: %s: URL to Update PHP page. */
 928                                                  ' ' . __( '<a href="%s">Learn more about updating PHP</a>.' ),
 929                                                  esc_url( wp_get_update_php_url() )
 930                                              );
 931                                              wp_update_php_annotation( '</p><p><em>', '</em>' );
 932                                          }
 933                                          ?>
 934                                      <# } else if ( ! data.updateResponse.compatibleWP ) { #>
 935                                          <?php
 936                                          printf(
 937                                              /* translators: %s: Theme name. */
 938                                              __( 'There is a new version of %s available, but it does not work with your version of WordPress.' ),
 939                                              '{{{ data.name }}}'
 940                                          );
 941                                          if ( current_user_can( 'update_core' ) ) {
 942                                              printf(
 943                                                  /* translators: %s: URL to WordPress Updates screen. */
 944                                                  ' ' . __( '<a href="%s">Please update WordPress</a>.' ),
 945                                                  self_admin_url( 'update-core.php' )
 946                                              );
 947                                          }
 948                                          ?>
 949                                      <# } else if ( ! data.updateResponse.compatiblePHP ) { #>
 950                                          <?php
 951                                          printf(
 952                                              /* translators: %s: Theme name. */
 953                                              __( 'There is a new version of %s available, but it does not work with your version of PHP.' ),
 954                                              '{{{ data.name }}}'
 955                                          );
 956                                          if ( current_user_can( 'update_php' ) ) {
 957                                              printf(
 958                                                  /* translators: %s: URL to Update PHP page. */
 959                                                  ' ' . __( '<a href="%s">Learn more about updating PHP</a>.' ),
 960                                                  esc_url( wp_get_update_php_url() )
 961                                              );
 962                                              wp_update_php_annotation( '</p><p><em>', '</em>' );
 963                                          }
 964                                          ?>
 965                                      <# } #>
 966                                  </p>
 967                              </div>
 968                          <# } #>
 969                      <# } #>
 970  
 971                      <# if ( data.parent ) { #>
 972                          <p class="parent-theme">
 973                              <?php
 974                              printf(
 975                                  /* translators: %s: Theme name. */
 976                                  __( 'This is a child theme of %s.' ),
 977                                  '<strong>{{{ data.parent }}}</strong>'
 978                              );
 979                              ?>
 980                          </p>
 981                      <# } #>
 982  
 983                      <# if ( ! data.compatibleWP || ! data.compatiblePHP ) { #>
 984                          <div class="notice notice-error notice-alt notice-large"><p>
 985                              <# if ( ! data.compatibleWP && ! data.compatiblePHP ) { #>
 986                                  <?php
 987                                  _e( 'This theme does not work with your versions of WordPress and PHP.' );
 988                                  if ( current_user_can( 'update_core' ) && current_user_can( 'update_php' ) ) {
 989                                      printf(
 990                                          /* translators: 1: URL to WordPress Updates screen, 2: URL to Update PHP page. */
 991                                          ' ' . __( '<a href="%1$s">Please update WordPress</a>, and then <a href="%2$s">learn more about updating PHP</a>.' ),
 992                                          self_admin_url( 'update-core.php' ),
 993                                          esc_url( wp_get_update_php_url() )
 994                                      );
 995                                      wp_update_php_annotation( '</p><p><em>', '</em>' );
 996                                  } elseif ( current_user_can( 'update_core' ) ) {
 997                                      printf(
 998                                          /* translators: %s: URL to WordPress Updates screen. */
 999                                          ' ' . __( '<a href="%s">Please update WordPress</a>.' ),
1000                                          self_admin_url( 'update-core.php' )
1001                                      );
1002                                  } elseif ( current_user_can( 'update_php' ) ) {
1003                                      printf(
1004                                          /* translators: %s: URL to Update PHP page. */
1005                                          ' ' . __( '<a href="%s">Learn more about updating PHP</a>.' ),
1006                                          esc_url( wp_get_update_php_url() )
1007                                      );
1008                                      wp_update_php_annotation( '</p><p><em>', '</em>' );
1009                                  }
1010                                  ?>
1011                              <# } else if ( ! data.compatibleWP ) { #>
1012                                  <?php
1013                                  _e( 'This theme does not work with your version of WordPress.' );
1014                                  if ( current_user_can( 'update_core' ) ) {
1015                                      printf(
1016                                          /* translators: %s: URL to WordPress Updates screen. */
1017                                          ' ' . __( '<a href="%s">Please update WordPress</a>.' ),
1018                                          self_admin_url( 'update-core.php' )
1019                                      );
1020                                  }
1021                                  ?>
1022                              <# } else if ( ! data.compatiblePHP ) { #>
1023                                  <?php
1024                                  _e( 'This theme does not work with your version of PHP.' );
1025                                  if ( current_user_can( 'update_php' ) ) {
1026                                      printf(
1027                                          /* translators: %s: URL to Update PHP page. */
1028                                          ' ' . __( '<a href="%s">Learn more about updating PHP</a>.' ),
1029                                          esc_url( wp_get_update_php_url() )
1030                                      );
1031                                      wp_update_php_annotation( '</p><p><em>', '</em>' );
1032                                  }
1033                                  ?>
1034                              <# } #>
1035                          </p></div>
1036                      <# } else if ( ! data.active && data.blockTheme ) { #>
1037                          <div class="notice notice-error notice-alt notice-large"><p>
1038                          <?php
1039                              _e( 'This theme doesn\'t support Customizer.' );
1040                          ?>
1041                          <# if ( data.actions.activate ) { #>
1042                              <?php
1043                              printf(
1044                                  /* translators: %s: URL to the themes page (also it activates the theme). */
1045                                  ' ' . __( 'However, you can still <a href="%s">activate this theme</a>, and use the Site Editor to customize it.' ),
1046                                  '{{{ data.actions.activate }}}'
1047                              );
1048                              ?>
1049                          <# } #>
1050                          </p></div>
1051                      <# } #>
1052  
1053                      <p class="theme-description">{{{ data.description }}}</p>
1054  
1055                      <# if ( data.tags ) { #>
1056                          <p class="theme-tags"><span><?php _e( 'Tags:' ); ?></span> {{{ data.tags }}}</p>
1057                      <# } #>
1058                  </div>
1059              </div>
1060  
1061              <div class="theme-actions">
1062                  <# if ( data.active ) { #>
1063                      <button type="button" class="button button-primary customize-theme"><?php _e( 'Customize' ); ?></button>
1064                  <# } else if ( 'installed' === data.type ) { #>
1065                      <div class="theme-inactive-actions">
1066                      <# if ( data.blockTheme ) { #>
1067                          <?php
1068                              /* translators: %s: Theme name. */
1069                              $aria_label = sprintf( _x( 'Activate %s', 'theme' ), '{{ data.name }}' );
1070                          ?>
1071                          <# if ( data.compatibleWP && data.compatiblePHP && data.actions.activate ) { #>
1072                              <a href="{{{ data.actions.activate }}}" class="button button-primary activate" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _e( 'Activate' ); ?></a>
1073                          <# } #>
1074                      <# } else { #>
1075                          <# if ( data.compatibleWP && data.compatiblePHP ) { #>
1076                              <button type="button" class="button button-primary preview-theme" data-slug="{{ data.id }}"><?php _e( 'Live Preview' ); ?></button>
1077                          <# } else { #>
1078                              <button class="button button-primary disabled"><?php _e( 'Live Preview' ); ?></button>
1079                          <# } #>
1080                      <# } #>
1081                      </div>
1082                      <?php if ( current_user_can( 'delete_themes' ) ) { ?>
1083                          <# if ( data.actions && data.actions['delete'] ) { #>
1084                              <a href="{{{ data.actions['delete'] }}}" data-slug="{{ data.id }}" class="button button-secondary delete-theme"><?php _e( 'Delete' ); ?></a>
1085                          <# } #>
1086                      <?php } ?>
1087                  <# } else { #>
1088                      <# if ( data.compatibleWP && data.compatiblePHP ) { #>
1089                          <button type="button" class="button theme-install" data-slug="{{ data.id }}"><?php _e( 'Install' ); ?></button>
1090                          <button type="button" class="button button-primary theme-install preview" data-slug="{{ data.id }}"><?php _e( 'Install &amp; Preview' ); ?></button>
1091                      <# } else { #>
1092                          <button type="button" class="button disabled"><?php _ex( 'Cannot Install', 'theme' ); ?></button>
1093                          <button type="button" class="button button-primary disabled"><?php _e( 'Install &amp; Preview' ); ?></button>
1094                      <# } #>
1095                  <# } #>
1096              </div>
1097          </div>
1098      </script>
1099      <?php
1100  }
1101  
1102  /**
1103   * Determines whether a theme is technically active but was paused while
1104   * loading.
1105   *
1106   * For more information on this and similar theme functions, check out
1107   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
1108   * Conditional Tags} article in the Theme Developer Handbook.
1109   *
1110   * @since 5.2.0
1111   *
1112   * @global WP_Paused_Extensions_Storage $_paused_themes
1113   *
1114   * @param string $theme Path to the theme directory relative to the themes directory.
1115   * @return bool True, if in the list of paused themes. False, not in the list.
1116   */
1117  function is_theme_paused( $theme ) {
1118      if ( ! isset( $GLOBALS['_paused_themes'] ) ) {
1119          return false;
1120      }
1121  
1122      if ( get_stylesheet() !== $theme && get_template() !== $theme ) {
1123          return false;
1124      }
1125  
1126      return array_key_exists( $theme, $GLOBALS['_paused_themes'] );
1127  }
1128  
1129  /**
1130   * Gets the error that was recorded for a paused theme.
1131   *
1132   * @since 5.2.0
1133   *
1134   * @global WP_Paused_Extensions_Storage $_paused_themes
1135   *
1136   * @param string $theme Path to the theme directory relative to the themes
1137   *                      directory.
1138   * @return array|false Array of error information as it was returned by
1139   *                     `error_get_last()`, or false if none was recorded.
1140   */
1141  function wp_get_theme_error( $theme ) {
1142      if ( ! isset( $GLOBALS['_paused_themes'] ) ) {
1143          return false;
1144      }
1145  
1146      if ( ! array_key_exists( $theme, $GLOBALS['_paused_themes'] ) ) {
1147          return false;
1148      }
1149  
1150      return $GLOBALS['_paused_themes'][ $theme ];
1151  }
1152  
1153  /**
1154   * Tries to resume a single theme.
1155   *
1156   * If a redirect was provided and a functions.php file was found, we first ensure that
1157   * functions.php file does not throw fatal errors anymore.
1158   *
1159   * The way it works is by setting the redirection to the error before trying to
1160   * include the file. If the theme fails, then the redirection will not be overwritten
1161   * with the success message and the theme will not be resumed.
1162   *
1163   * @since 5.2.0
1164   *
1165   * @global string $wp_stylesheet_path Path to current theme's stylesheet directory.
1166   * @global string $wp_template_path   Path to current theme's template directory.
1167   *
1168   * @param string $theme    Single theme to resume.
1169   * @param string $redirect Optional. URL to redirect to. Default empty string.
1170   * @return bool|WP_Error True on success, false if `$theme` was not paused,
1171   *                       `WP_Error` on failure.
1172   */
1173  function resume_theme( $theme, $redirect = '' ) {
1174      global $wp_stylesheet_path, $wp_template_path;
1175  
1176      list( $extension ) = explode( '/', $theme );
1177  
1178      /*
1179       * We'll override this later if the theme could be resumed without
1180       * creating a fatal error.
1181       */
1182      if ( ! empty( $redirect ) ) {
1183          $functions_path = '';
1184          if ( str_contains( $wp_stylesheet_path, $extension ) ) {
1185              $functions_path = $wp_stylesheet_path . '/functions.php';
1186          } elseif ( str_contains( $wp_template_path, $extension ) ) {
1187              $functions_path = $wp_template_path . '/functions.php';
1188          }
1189  
1190          if ( ! empty( $functions_path ) ) {
1191              wp_redirect(
1192                  add_query_arg(
1193                      '_error_nonce',
1194                      wp_create_nonce( 'theme-resume-error_' . $theme ),
1195                      $redirect
1196                  )
1197              );
1198  
1199              // Load the theme's functions.php to test whether it throws a fatal error.
1200              ob_start();
1201              if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
1202                  define( 'WP_SANDBOX_SCRAPING', true );
1203              }
1204              include $functions_path;
1205              ob_clean();
1206          }
1207      }
1208  
1209      $result = wp_paused_themes()->delete( $extension );
1210  
1211      if ( ! $result ) {
1212          return new WP_Error(
1213              'could_not_resume_theme',
1214              __( 'Could not resume the theme.' )
1215          );
1216      }
1217  
1218      return true;
1219  }
1220  
1221  /**
1222   * Renders an admin notice in case some themes have been paused due to errors.
1223   *
1224   * @since 5.2.0
1225   *
1226   * @global string                       $pagenow        The filename of the current screen.
1227   * @global WP_Paused_Extensions_Storage $_paused_themes
1228   */
1229  function paused_themes_notice() {
1230      if ( 'themes.php' === $GLOBALS['pagenow'] ) {
1231          return;
1232      }
1233  
1234      if ( ! current_user_can( 'resume_themes' ) ) {
1235          return;
1236      }
1237  
1238      if ( ! isset( $GLOBALS['_paused_themes'] ) || empty( $GLOBALS['_paused_themes'] ) ) {
1239          return;
1240      }
1241  
1242      $message = sprintf(
1243          '<p><strong>%s</strong><br>%s</p><p><a href="%s">%s</a></p>',
1244          __( 'One or more themes failed to load properly.' ),
1245          __( 'You can find more details and make changes on the Themes screen.' ),
1246          esc_url( admin_url( 'themes.php' ) ),
1247          __( 'Go to the Themes screen' )
1248      );
1249      wp_admin_notice(
1250          $message,
1251          array(
1252              'type'           => 'error',
1253              'paragraph_wrap' => false,
1254          )
1255      );
1256  }


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