public static function destroy($key = '')
    {
        if (isset($_COOKIE[self::$prefix . $key])) {
            setcookie(self::$prefix . $key, '', time() - 3600, '/');

            return true;
        }

        if (count($_COOKIE) > 0) {
            foreach ($_COOKIE as $key => $value) {
                setcookie($key, '', time() - 3600, '/');
            }

            return true;
        }

        return false;
    }