callmez\wechat\sdk\components\BaseWechat::encryptXml PHP Метод

    public function encryptXml($xml, $timestamp, $nonce)
    {
        $errorCode = $this->getMessageCrypt()->encryptMsg($xml, $timestamp, $nonce, $xml);
        if ($errorCode) {
            $this->lastError = ['errcode' => $errorCode, 'errmsg' => 'XML数据加密失败!'];
            return false;
        }
        return $xml;
    }