/** * Returns an instance of the distributed cache driver * * @return Pfw_Cache|null instance of a Pfw_Cache object or null if none * is configured */ public static function getInstance() { if (!is_null(self::$instance)) { return self::$instance; } if (null == ($dist_cache = Pfw_Config::get('dist_cache'))) { return null; } if (is_array($dist_cache)) { $class = $dist_cache['class']; unset($dist_cache['class']); $options = $dist_cache; } else { $class = $dist_cache; $options = array(); } Pfw_Loader::loadClass($class); self::$instance = new $class($options); return self::$instance; }