Horde_Pack::__construct PHP Method

    public function __construct()
    {
        if (empty(self::$_drivers)) {
            $fi = new FilesystemIterator(__DIR__ . '/Pack/Driver');
            $class_prefix = __CLASS__ . '_Driver_';
            foreach ($fi as $val) {
                if ($val->isFile()) {
                    $cname = $class_prefix . $val->getBasename('.php');
                    if (class_exists($cname) && $cname::supported()) {
                        $ob = new $cname();
                        self::$_drivers[$ob->id] = $ob;
                    }
                }
            }
            krsort(self::$_drivers, SORT_NUMERIC);
            self::$_compress = new Horde_Compress_Fast();
        }
    }