mytharcher\sdk\alipay\Alipay::verifyCallback PHP Метод

    function verifyCallback()
    {
        $async = empty($_GET);
        $data = $async ? $_POST : $_GET;
        if (empty($data)) {
            return FALSE;
        }
        $signValid = $this->verifyParameters($data, $data["sign"]);
        $notify_id = isset($data['notify_id']) ? $data['notify_id'] : NULL;
        if ($async && $this->is_mobile) {
            //对notify_data解密
            if ($this->config['sign_type'] == '0001') {
                $data['notify_data'] = $this->rsaDecrypt($data['notify_data'], $this->config['private_key_path']);
            }
            //notify_id从decrypt_post_para中解析出来（也就是说decrypt_post_para中已经包含notify_id的内容）
            $doc = new \DOMDocument();
            $doc->loadXML($data['notify_data']);
            $notify_id = $doc->getElementsByTagName('notify_id')->item(0)->nodeValue;
        }
        //获取支付宝远程服务器ATN结果（验证是否是支付宝发来的消息）
        $responseTxt = 'true';
        if (!empty($notify_id)) {
            $responseTxt = $this->verifyFromServer($notify_id);
        }
        //验证
        //$signValid的结果不是true，与安全校验码、请求时的参数格式（如：带自定义参数等）、编码格式有关
        //$responsetTxt的结果不是true，与服务器设置问题、合作身份者ID、notify_id一分钟失效有关
        return $signValid && preg_match("/true\$/i", $responseTxt);
    }