wp_cache_themes_persistently

apply_filters('wp_cache_themes_persistently') is found 2 times:

• /wp-includes/class-wp-theme.php line 257

   
  		// Initialize caching on first run.
  		if ( ! isset( self::$persistently_cache ) ) {
  			/** This action is documented in wp-includes/theme.php */
  			self::$persistently_cache = apply_filters( 'wp_cache_themes_persistently', false, 'WP_Theme' );
  			if ( self::$persistently_cache ) {
  				wp_cache_add_global_groups( 'themes' );
  				if ( is_int( self::$persistently_cache ) ) {
  					self::$cache_expiration = self::$persistently_cache;
  				}
  			} else {
  

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• /wp-includes/theme.php line 487

  	 *
  	 * @param bool   $cache_expiration Whether to get the cache of the theme directories. Default false.
  	 * @param string $context          The class or function name calling the filter.
  	 */
  	$cache_expiration = apply_filters( 'wp_cache_themes_persistently', false, 'search_theme_directories' );
  
  	if ( $cache_expiration ) {
  		$cached_roots = get_site_transient( 'theme_roots' );
  		if ( is_array( $cached_roots ) ) {
  			foreach ( $cached_roots as $theme_dir => $theme_root ) {
  				// A cached theme root is no longer around, so skip it.
  

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