think\controller\Rest::_empty PHP Метод

    public function _empty($method)
    {
        if (method_exists($this, $method . '_' . $this->method . '_' . $this->type)) {
            // RESTFul方法支持
            $fun = $method . '_' . $this->method . '_' . $this->type;
        } elseif ($this->method == $this->restDefaultMethod && method_exists($this, $method . '_' . $this->type)) {
            $fun = $method . '_' . $this->type;
        } elseif ($this->type == $this->restDefaultType && method_exists($this, $method . '_' . $this->method)) {
            $fun = $method . '_' . $this->method;
        }
        if (isset($fun)) {
            return App::invokeMethod([$this, $fun]);
        } else {
            // 抛出异常
            throw new \Exception('error action :' . $method);
        }
    }