微信异步回调

//异步回调
public function actionNotify()
{
    $postXml                 = file_get_contents('php://input');
    if (empty($postXml)){
        echo "数据不能为空";die;
    }
    $returnData              = WxPay::xmlToArray($postXml);
    if ($returnData['return_msg'] == "OK" && $returnData['return_code'] =="SUCCESS"){
        //根据自己业务需要去执行操作
        if (!empty($orderStaus)){
            if ($orderStaus['order_status'] == 2){
                define('DS', DIRECTORY_SEPARATOR);                 // 设置目录分隔符
                define('LOG_PATH',dirname('../payLog').DS.'payLog'.DS);
                $setLog                 = Log::write(json_encode($returnData),'payLog'); //写入日志
                echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';die;
            }else{
                $ModifyOrderStatus      = OwnerOrder::updateAll(['order_status'=>2],['o_id'=>$orderStaus['o_id']]); //修改订单状态
                define('DS', DIRECTORY_SEPARATOR);                 // 设置目录分隔符
                define('LOG_PATH',dirname('../payLog').DS.'payLog'.DS);
                $setLog                 = Log::write(json_encode(['订单状态'=>$ModifyOrderStatus,'data'=>$returnData]),'payLog'); //写入日志
                echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';die;
            }
        }else{
            return false;
        }
    }else{
        define('DS', DIRECTORY_SEPARATOR);                 // 设置目录分隔符
        define('LOG_PATH',dirname('../payLog').DS.'payLog'.DS);
        $setLog                 = Log::write(json_encode($returnData),'payLog'); //写入日志
        echo  '<xml><return_code><![CDATA[FAIL]]></return_code><return_msg><![CDATA[签名失败]]></return_msg></xml>';die;
    }
}