TP5 Alipay refund and callback

I have always used WeChat. Suddenly, the customer said that he wanted Alipay, so he checked the documents and various Baidu summaries and recorded them.
With Alipay payment, the refund is easy to operate. The SDK introduced by the individual is placed in the extend, and then it should be noted that AopClient.php in the php7.2 SDK will have a method to report an error and modify it accordingly.
directly on the code

	/**
     * 统一收单交易退款接口
     * @param string $out_trade_no 订单支付时传入的商户订单号
     * @param string $refund_fee 需要退款的金额
     * @return array
     */
    public function payRefundAli($out_trade_no = "", $refund_fee = "0.00",$platform_id="",$transaction_id="")
    {
    
    
        require '../extend/alipay/aop/AopClient.php';
        require '../extend/alipay/aop/request/AlipayTradeRefundRequest.php';
        $aop = new \AopClient;
        $aop->gatewayUrl = 'https://openapi.alipay.com/gateway.do';;
        $aop->appId = "支付宝";
        $aop->rsaPrivateKey = "支付宝私钥";
        $aop->alipayrsaPublicKey ="支付宝公钥";

        $aop->apiVersion = '1.0';
        $aop->signType = 'RSA2';
        $aop->postCharset = 'utf-8';
        $aop->format = 'json';

        $request = new \AlipayTradeRefundRequest;

//        //TODO 方便多次退款的设置
        $out_request_no = $out_trade_no.rand(1000,9999);
        $request->setBizContent("{" .
            //订单支付时传入的商户订单号,不能和 trade_no同时为空。
            "\"out_trade_no\":\"$out_trade_no\"," .
            //支付宝交易号，和商户订单号不能同时为空
            "\"trade_no\":\"$transaction_id\"," .
            //需要退款的金额，该金额不能大于订单金额,单位为元，支持两位小数 c
            "\"refund_amount\":$refund_fee," .
            //标识一次退款请求，同一笔交易多次退款需要保证唯一，如需部分退款，则此参数必传
            "\"out_request_no\":\"$out_request_no\"" .
            "  }");
        $result = $aop->execute($request);
        $responseNode = str_replace(".", "_", $request->getApiMethodName()) . "_response";
        $resultCode = $result->$responseNode->code;

        if (!empty($resultCode) && $resultCode == 10000) {
    
    
            $status = 1;
            $message = "退款成功";
        } else {
    
    
            $status = 0;
            $message = $result->alipay_trade_refund_response->sub_msg;
        }
        //echo $message;
        return $message;
    }


/**
     * 调用退款接口
     * @param string $order_id  订单支付时传入的商户订单号
     * @param string $amount   需要退款的金额
     * @param array  $info  含有订单金额  支付成功返回的交易单号transaction_id
     * @return array
     */
public function refund($order_id,$info,$amount)
    {
    
    
        $appid = config('base.web_appid');
        $mch_id = config('base.wev_mch_id');
        $key = config('base.web_appsecret');
        $apiKey = config('base.web_apiKey');
        $wxPay = new WxpayService($mch_id, $appid, $key, $apiKey);
        $order_no = $order_id;//退款的订单号
        $total_fee = intval($info['amount'] * 100);;//订单金额
        $refund_fee = intval($amount * 100);//退款的金额
        $transaction_id = $info['transaction_id'];
        $notify_url = 'https://xxxx/refundNotify';
        $result = $wxPay->wx_refund($appid, $mch_id, $order_no, $notify_url, $total_fee, $refund_fee, $transaction_id, $apiKey);
        if ($result){
    
    
            return $result;
        }else{
    
    
            return false;
        }
    }


//退款回调
    public function refundNotify(){
    
    
        $data = file_get_contents('php://input');
        if (empty($data)){
    
    
            $data=$GLOBALS['HTTP_RAW_POST_DATA'];;
        }
        $arr = xmlToArray($data);
        //判断返回状态
        if($arr['return_code'] == 'SUCCESS'){
    
    
            $req_info = $arr['req_info'];
            $rep=$this->decipheringReqInfo($req_info);
            if($rep["refund_status"] == "SUCCESS") {
    
    
                //修改订单状态
                
                return '<xml> <return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
            }
        }
        return '<xml> <return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
    }

//题外话：测试的时候发现退款1元扣除了0.01的费用，所以总的账户金额会有额外的支出，要稍微注意下