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Source View: wp_cache_themes_persistently

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Line Code
186       * @param string        $theme_root Theme root.
187       * @param WP_Theme|null $_child If this theme is a parent theme, the child may be passed for validation purposes.
188       */
189      public function __construct( $theme_dir, $theme_root, $_child = null ) {
190           global $wp_theme_directories;
191
192           // Initialize caching on first run.
193           if ( ! isset( self::$persistently_cache ) ) {
194                /** This action is documented in wp-includes/theme.php */
195                self::$persistently_cache = apply_filters( 'wp_cache_themes_persistently', false, 'WP_Theme' );
196                if ( self::$persistently_cache ) {
197                     wp_cache_add_global_groups( 'themes' );
198                     if ( is_int( self::$persistently_cache ) ) {
199                          self::$cache_expiration = self::$persistently_cache;
200                     }
201                } else {
202                     wp_cache_add_non_persistent_groups( 'themes' );
203                }
204           }