think\Validate::__callStatic PHP Method

    public static function __callStatic($method, $params)
    {
        $class = new static();
        if (method_exists($class, $method)) {
            return call_user_func_array([$class, $method], $params);
        } else {
            throw new \BadMethodCallException('method not exists:' . __CLASS__ . '->' . $method);
        }
    }