public function index() { 
        $wechat = new Wechat(); 
        $data['order'] = date('Ymd') . substr(implode(NULL, array_map('ord', str_split(substr(uniqid(), 7, 13), 1))), 0, 8); //订单号 
        $data['set'] = "测试"; 
        $data['money'] = 0.01; 
        $data['userid'] = 1; 
        if (!Db::execute('INSERT INTO order_sucaihuo(uid,order_no,order_money,addtime) VALUES(?,?,?,?)', [$data['userid'], $data['order'], $data['money'], time()])) { 
            return '失败，请重试！'; 
        } 
        $url = $wechat->send($data); 
        $data['url'] = 'http://paysdk.weixin.qq.com/example/qrcode.php?data=' . $url; 
        // return '<img alt="模式二扫码支付" src="http://paysdk.weixin.qq.com/example/qrcode.php?data='.$url.'" style="width:150px;height:150px;"/>'; 
        return view('index', $data); 
    }

if ($WeChatNotify->notify($xml) == true) { 
            file_put_contents('./time.txt', date("Y-m-d H:i:s")); 
            //$WeChatNotify->getValues()  获取到xml转换为数组的键值对 
            //out_trade_no对应的商户订单号 
            //total_fee为订单金额的一百的倍数  也就是total_fee/100为支付的金额 
            //还有几个键值对需要用的话可以打印出来看  都是微信官方定义的 
            $data = $WeChatNotify->getValues(); 
            file_put_contents('./data.txt', json_encode($data)); 
            if (empty($data) || empty($data['out_trade_no']) || empty($data['total_fee'])) { 
                return; 
            } 
            $orderData = Db::query("SELECT * FROM order_sucaihuo WHERE order_no='" . $data['out_trade_no'] . "' AND state=0"); 
            if (empty($orderData)) { 
                return; 
            } 
            $orderData = $orderData[0]; 
            if ($orderData['order_money'] != $data['total_fee'] / 100) { 
                return; 
            } 
            $orderResult = Db::execute("UPDATE order_sucaihuo SET state=1,update_time=" . time() . ""); 
            if (!$orderResult) { 
                return; 
            } 
            return "SUCCESS"; 
        }