微信扫码支付模式二回调怎么处理?

<?php
ini_set('date.timezone','Asia/Shanghai');
error_reporting(E_ERROR);

require_once "../lib/WxPay.Api.php";
require_once '../lib/WxPay.Notify.php';
require_once 'log.php';

//初始化日志
$logHandler= new CLogFileHandler("../logs/".date('Y-m-d').'.log');
$log = Log::Init($logHandler, 15);

class PayNotifyCallBack extends WxPayNotify
{

//查询订单
public function Queryorder($transaction_id)
{
    $input = new WxPayOrderQuery();
    $input->SetTransaction_id($transaction_id);
    $result = WxPayApi::orderQuery($input);
    Log::DEBUG("query:" . json_encode($result));
    if(array_key_exists("return_code", $result)
        && array_key_exists("result_code", $result)
        && $result["return_code"] == "SUCCESS"
        && $result["result_code"] == "SUCCESS")
    {
        return true;
    }
    return false;
}

//重写回调处理函数
public function NotifyProcess($data, &$msg)
{
    Log::DEBUG("call back:" . json_encode($data));
    $notfiyOutput = array();
    
    if(!array_key_exists("transaction_id", $data)){
        $msg = "输入参数不正确";
        return false;
    }
    //查询订单，判断订单真实性
    if(!$this->Queryorder($data["transaction_id"])){
        $msg = "订单查询失败";
        return false;
    }
    return true;
}

}

Log::DEBUG("begin notify");
$notify = new PayNotifyCallBack();
$notify->Handle(false);
?>