PHP project integrates WeChat code scanning payment API (domestic payment)

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1. Application process for WeChat scan code payment

1. Apply for the enterprise version of the public account (personal subscription accounts cannot activate the payment function), registration channel: WeChat public platform registration;

2. Apply for a WeChat payment merchant account. The application channel is in the WeChat public platform where the application is successful;

3. Log in to the WeChat merchant platform and find the product center->My Products ->Scan QR code to pay. After clicking Scan QR code to pay, apply for activation, and then it is a series of filling in information and the next step.

4. After the scan code payment product application is successful, also on the WeChat merchant platform, find the Product Center -> Development Configuration, configure the API key, and find any one that generates a 32-digit password. Tool, generate a key, save.

5. Find the Product Center->APPID Authorization Management, and add my domain name to the authorization address.

At this point, the basic operation is completed.

2. Obtain the configuration information and files required for WeChat payment

1. Obtain the configuration information

(1) APPID: The application ID of the WeChat official account, find it in the WeChat official account.

(2) APPSECRET: WeChat public account key, 32-digit password, find it in the WeChat public account.

(3) MCHID: Merchant ID, view it in the Account Center->Personal Information in the WeChat Merchant Platform.

(4) KEY: API key, view it in the Account Center->API Security of the WeChat Merchant Platform.

2. Download the WeChat payment security certificate

WeChat Merchant Platform, find "Account Center->Account Settings->API Security->Download Certificate", download the certificate and save it in a local file.

3. Practical application operation (ThinkPHP3.2)

1. Download the WeChat scan code payment PHP version demo, download channel: WeChat scan code payment demo;

2. Unzip the cert in the folder The installation certificate in the file is replaced with the security certificate we previously saved locally.

3. Find /lib/WxPay.Config.php, open the file, and replace the configuration parameters with the parameters we obtained before, as follows:

#4. Cut the demo file to the Vendor of the ThinkPHP project. The specific address is: /ThinkPHP/Library/Vendor/, as follows:

##5. The actual application code in the controller, the controller is the pay controller under the home module.

(1) Generate WeChat payment link and load the payment page code:

    public function wxpay()
    {
        // 设置时区
        ini_set('date.timezone','Asia/Shanghai');
        error_reporting(E_ERROR);

        // 引入支付核心文件
        vendor('wxpay.lib.WxPay#Api');
        vendor('wxpay.example.WxPay#NativePay');
        vendor('wxpay.example.log');

        //获取数据
        $title = $_POST['title'];
        $description = $_POST['description'];
        $order_no = $_POST['order_no'];
        $total = $_POST['total'];

        // 组装支付参数数据
        $input = new \WxPayUnifiedOrder();
        $input->SetBody($title);
        $input->SetAttach($description);
        $input->SetOut_trade_no($orderno);
        $input->SetTotal_fee($total);
        $input->SetTime_start(date("YmdHis"));
        $input->SetTime_expire(date("YmdHis", time() + 600));
        $input->SetGoods_tag("test");
        // 设置微信扫码支付成功后的回调地址
        $input->SetNotify_url("http://www.XXXXXX.com/Home/pay/wx_notify");
        $input->SetTrade_type("NATIVE");
        $input->SetProduct_id("123");

        // 生成支付链接
        $notify = new \NativePay();
        $result = $notify->GetPayUrl($input);
        $url    = $result["code_url"];
        $this->assign("url",base64_encode($url));

        // 加载二维码生成页面
        $this->display("test/wxpay");
    }

(2) Payment page html code

<p class="block" style="text-align: center;">
      <img src="{:U(&#39;Home/pay/qrcode&#39;,array(&#39;url&#39;=>$url))}" alt="微信支付二维码" />
      <p style="text-align: center;color: #4a8bc2;font-size: 20px;">请打开微信，扫描上方二维码完成支付</p>
</p>

( 3) Generate QR code

    // 生成微信支付二维码
    public function qrcode(){
        error_reporting(E_ERROR);
        vendor('wxpay.example.phpqrcode.phpqrcode');
        $url = base64_decode($_GET["url"]);             //二维码内容
        $errorCorrectionLevel = 'H';                    //容错级别 
        $matrixPointSize = 10;                          //生成图片大小 
        \QRcode::png($url,false,$errorCorrectionLevel, $matrixPointSize,3);
    }

(4) Scan code payment callback function

	// 微信回调
	public function wx_notify(){
		ini_set('date.timezone','Asia/Shanghai');
		error_reporting(E_ERROR);

		vendor('wxpay.example.notify');

		$notify = new \PayNotifyCallBack();
		$notify->Handle(false);

		$is_success = $notify->IsSuccess(); 
		$bdata = $is_success['data']; 				//获取微信回调数据

		if($is_success['code'] == 1){
			//验证成功，获取数据
			$total_fee=$bdata['total_fee']/100;		//支付金额
			$trade_no=$bdata['transaction_id'];		//微信订单号
			$out_trade_no=$bdata['out_trade_no'];	        //系统订单号
			$openid=$bdata['openid'];			//用户在商户appid下的唯一标识

			// 其他coding ……
		}
	}

(5) Idea to determine whether payment is successful in the page

Because the WeChat scan code payment page I wrote it myself. To determine whether the payment is successful, you also need to write js on the QR code page to monitor whether the payment is successful. The general idea is:

页面中写一个定时执行的js函数，每隔1秒钟监测一下当前支付订单的状态，如果订单状态变为已支付，则马上回馈用户支付状态，并跳转到支付成功状态页。

4. Reference documents

Alipay scan code payment development documents;
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