if (is_dir($cache_dir) && ($dh = opendir($cache_dir))) {
            while (($dir = readdir($dh)) !== false) {
                if (!in_array($dir, array('.', '..', 'scripts', 'styles', "{$post_id}"))) {
                    self::removeDirectory($cache_dir . '/' . $dir);
                }
            }
            closedir($dh);
        }
    }
    public static function check_version()
    {
        return version_compare(PHP_VERSION, '5.4', '>=');
    }
}
if (TFCache::check_version() && themify_get('setting-page_builder_is_active') == 'enable') {
    if (!is_admin() && !TFCache::is_ajax()) {
        TFCache::$turnoff_cache = TFCache::is_cache_activate();
        if (!TFCache::$turnoff_cache) {
            $dirname = dirname(__FILE__);
            require_once $dirname . '/minify/minify.php';
            require_once $dirname . '/minify/css.php';
            require_once $dirname . '/minify/html.php';
            require_once $dirname . '/minify/converter.php';
            TFCache::wp_enque_scripts();
        }
    } elseif (is_admin()) {
        add_action('save_post', array('TFCache', 'cache_update'), 10, 3);
    }
} else {
    TFCache::$turnoff_cache = true;
}