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


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