wp_cache_themes_persistently filter-hook . WP 3.4.0

Filters whether to get the cache of the registered theme directories.

Usage

add_filter( 'wp_cache_themes_persistently', 'filter_function_name_9884', 10, 2 );
function filter_function_name_9884( $cache_expiration, $cache_directory ){
	// filter...

	return $cache_expiration;
}

$cache_expiration(true/false)

Whether to get the cache of the theme directories.
Default: false

$cache_directory(string)

Directory to be searched for the cache.

Where the hook is called

if ( $cache_expiration = apply_filters( 'wp_cache_themes_persistently', false, 'search_theme_directories' ) ) {

self::$persistently_cache = apply_filters( 'wp_cache_themes_persistently', false, 'WP_Theme' );

Where the hook is used (in WP core)