处理微信支付的异步回调

版权声明：科比龙篮 https://blog.csdn.net/qq_36514588/article/details/82892772

/**
     * 微信支付异步回调（只有异步回调对订单进行处理）
     */
    public function wchatUrlBack()
    {
        $postStr = file_get_contents('php://input');
        if (! empty($postStr)) {
            $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
            $pay = new UnifyPay();
            $check_sign = $pay->checkSign($postObj, $postObj->sign);
            if ($postObj->result_code == 'SUCCESS' && $check_sign == 1) {
                $retval = $pay->onlinePay($postObj->out_trade_no, 1);
                $xml = "<xml>
                    <return_code><![CDATA[SUCCESS]]></return_code>
                    <return_msg><![CDATA[支付成功]]></return_msg>
                </xml>";
                echo $xml;
            } else {
                $xml = "<xml>
                    <return_code><![CDATA[FAIL]]></return_code>
                    <return_msg><![CDATA[支付失败]]></return_msg>
                </xml>";
                echo $xml;
            }
        }
    }