Omnipay\Alipay\Requests\AbstractAopRequest::convertToString PHP 메소드

    protected function convertToString()
    {
        foreach ($this->parameters->all() as $key => $value) {
            if (is_array($value) || is_object($value)) {
                $this->parameters->set($key, json_encode($value));
            }
        }
    }