WeChat payment is now common in our lives, and WeChat applets are also very popular during development. In this article, we will continue to explain to you about Thinkphp’s integration of WeChat payment functions.

1. WeChat public account:

Set the domain name that can obtain user ID information permissions among the unique appid, appscrect, and interface permissions (each user will have a unique ID for different publics. Obtain the basic information of the user's WeChat account through this ID (see the WeChat developer documentation for details), set the WeChat payment authorization directory on the WeChat payment button (written to the level of the controller that initiates the request), and set the developer's WeChat account as a test whitelist (Required when using WeChat developer tools)

2. WeChat payment platform:

Merchant platform login account, payment key (you can set it yourself at any time, there can only be one),

3. Integrate the logic into thinkphp:

Set the front-end WeChat payment button and click to call the payment initiation controller method,

The controller runs, references the WeChat payment class, and obtains the user openid , obtain the order data, splice out all the data required by ordinary merchants' prepayment jsp, display the customized payment page,

Click to pay on the payment page, and call the jspi script function provided by WeChat to initiate payment to initiate payment. ,

After the payment is completed, the page will redirect to (the jump directory {:U('controller/function)} set in the script function of the custom payment page), and the asynchronous (silent) setting will be Processing order logic (recording payment time, marking as paid, marking as WeChat payment), etc.

Code:

WeChat payment button on my order page:

WeChat Payment

Initiate payment controller Wxpay:

<?php
namespace Home\Controller;
use Think\Controller;
//微信支付類
class WxpayController extends Controller {
 //獲取access_token過程中的跳轉(zhuǎn)uri，通過跳轉(zhuǎn)將code傳入jsapi支付頁面
 public function js_api_start(){
  if(!empty($_GET[&#39;order_key_num&#39;])){
   // session(array(&#39;pay_now_id&#39;=>$_GET[&#39;order_key_num&#39;],&#39;expire&#39;=>3600));
   S(&#39;pay_now_id&#39;,$_GET[&#39;order_key_num&#39;],3600);
  }
  vendor(&#39;Weixinpay.WxPayPubHelper&#39;);
  //使用jsapi接口
  $jsApi = new \JsApi_pub();
  //=========步驟1：網(wǎng)頁授權(quán)獲取用戶openid============
  //通過code獲得openid
   if($_GET[&#39;code&#39;] == &#39;&#39;){
   //跳轉(zhuǎn)
    $redirect_uri = &#39;https://當(dāng)前域名+模塊+控制器+方法&#39;;
    $url = &#39;https://open.weixin.qq.com/connect/oauth2/authorize
    ?appid=公眾號(hào)特有IDredirect_uri=&#39;.$redirect_uri.&#39;&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect&#39;;
    header("Location: $url");
    exit();
   }else{
   //獲取openid
   $url = &#39;https://api.weixin.qq.com/sns/oauth2/access_token
   ?appid=公眾號(hào)ID&secret=公眾號(hào)scrept&code=&#39;.$_GET[&#39;code&#39;].&#39;&grant_type=authorization_code&#39;; 
   $openid_arr = json_decode(file_get_contents($url),true);
  }
  $openid=$openid_arr[&#39;openid&#39;];
  $pay_now_id = S(&#39;pay_now_id&#39;);
  if($pay_now_id){
   $id=$pay_now_id;
   $o = D(&#39;order_info&#39;);
   $order_info = $o->where(&#39;order_id = %d&#39;,$id)->find();
   if(empty($order_info[&#39;paycode&#39;])){
    $order_info[&#39;paycode&#39;] = &#39;weixin&#39;;
   }
   if($order_info[&#39;is_pay&#39;]){
    $this->error(&#39;當(dāng)前訂單已經(jīng)支付&#39;);
   }
  }else{
   $this->error("不存在當(dāng)前訂單編號(hào)!");
  }
   $res = array(
   &#39;order_sn&#39; => $order_info[&#39;order_sn&#39;],
   &#39;order_amount&#39; => $order_info[&#39;pay_money&#39;]
   );
  //=========步驟2：使用統(tǒng)一支付接口，獲取prepay_id============
  //使用統(tǒng)一支付接口
  $unifiedOrder = new \UnifiedOrder_pub();
  //設(shè)置統(tǒng)一支付接口參數(shù)
  //設(shè)置必填參數(shù)
  //appid已填,商戶無需重復(fù)填寫
  //mch_id已填,商戶無需重復(fù)填寫
  //noncestr已填,商戶無需重復(fù)填寫
  //spbill_create_ip已填,商戶無需重復(fù)填寫
  //sign已填,商戶無需重復(fù)填寫
  $total_fee = $order_info[&#39;pay_money&#39;]*100;
  // $total_fee = $res[&#39;order_amount&#39;];
  //$total_fee = 1;
  // var_dump($order_info[&#39;pay_money&#39;]);die;
  $body = "訂單支付";
  $unifiedOrder->setParameter("openid", "$openid");//用戶標(biāo)識(shí)
  $unifiedOrder->setParameter("body", &#39;商品采購&#39;);//商品描述
  //自定義訂單號(hào)，此處僅作舉例
  $unifiedOrder->setParameter("out_trade_no", $order_info[&#39;order_sn&#39;]);//商戶訂單號(hào) 
  $unifiedOrder->setParameter("total_fee", $total_fee);//總金額
  //$unifiedOrder->setParameter("attach", "order_sn={$res[&#39;order_sn&#39;]}");//附加數(shù)據(jù) 
  $unifiedOrder->setParameter("notify_url", \WxPayConf_pub::NOTIFY_URL);//通知地址 
  $unifiedOrder->setParameter("trade_type", "JSAPI");//交易類型
  //非必填參數(shù)，商戶可根據(jù)實(shí)際情況選填
  //$unifiedOrder->setParameter("sub_mch_id","XXXX");//子商戶號(hào) 
  //$unifiedOrder->setParameter("device_info","XXXX");//設(shè)備號(hào) 
  //$unifiedOrder->setParameter("attach","XXXX");//附加數(shù)據(jù) 
  //$unifiedOrder->setParameter("time_start","XXXX");//交易起始時(shí)間
  //$unifiedOrder->setParameter("time_expire","XXXX");//交易結(jié)束時(shí)間 
  //$unifiedOrder->setParameter("goods_tag","XXXX");//商品標(biāo)記 
  //$unifiedOrder->setParameter("openid","XXXX");//用戶標(biāo)識(shí)
  //$unifiedOrder->setParameter("product_id","XXXX");//商品ID
  $prepay_id = $unifiedOrder->getPrepayId();
  // var_dump($prepay_id);die;
  //=========步驟3：使用jsapi調(diào)起支付============
  $jsApi->setPrepayId($prepay_id);
  $jsApiParameters = $jsApi->getParameters();
  $wxconf = json_decode($jsApiParameters, true);
  if ($wxconf[&#39;package&#39;] == &#39;prepay_id=&#39;) {
   $this->error(&#39;當(dāng)前訂單存在異常!&#39;);
  }
  $this->assign(&#39;res&#39;, $res);
  $this->assign(&#39;jsApiParameters&#39;, $jsApiParameters);
  $this->display(&#39;jsapi&#39;);
 }
 //異步通知url，商戶根據(jù)實(shí)際開發(fā)過程設(shè)定
 public function notify_url() {
  vendor(&#39;Weixinpay.WxPayPubHelper&#39;);
  //使用通用通知接口
  $notify = new \Notify_pub();
  //存儲(chǔ)微信的回調(diào)
  $xml = $GLOBALS[&#39;HTTP_RAW_POST_DATA&#39;]; 
  $notify->saveData($xml);
  //驗(yàn)證簽名，并回應(yīng)微信。
  //對(duì)后臺(tái)通知交互時(shí)，如果微信收到商戶的應(yīng)答不是成功或超時(shí)，微信認(rèn)為通知失敗，
  //微信會(huì)通過一定的策略（如30分鐘共8次）定期重新發(fā)起通知，
  //盡可能提高通知的成功率，但微信不保證通知最終能成功。
  if($notify->checkSign() == FALSE){
   $notify->setReturnParameter("return_code", "FAIL");//返回狀態(tài)碼
   $notify->setReturnParameter("return_msg", "簽名失敗");//返回信息
  }else{
   $notify->setReturnParameter("return_code", "SUCCESS");//設(shè)置返回碼
  }
  $returnXml = $notify->returnXml();
  //==商戶根據(jù)實(shí)際情況設(shè)置相應(yīng)的處理流程，此處僅作舉例=======
  //以log文件形式記錄回調(diào)信息
  //$log_name = "notify_url.log";//log文件路徑
  //$this->log_result($log_name, "【接收到的notify通知】:\n".$xml."\n");
  $parameter = $notify->xmlToArray($xml);
  //$this->log_result($log_name, "【接收到的notify通知】:\n".$parameter."\n");
  if($notify->checkSign() == TRUE){
   if ($notify->data["return_code"] == "FAIL") {
    //此處應(yīng)該更新一下訂單狀態(tài)，商戶自行增刪操作
    //$this->log_result($log_name, "【通信出錯(cuò)】:\n".$xml."\n");
    //更新訂單數(shù)據(jù)【通信出錯(cuò)】設(shè)為無效訂單
    echo &#39;error&#39;;
   }
   else if($notify->data["result_code"] == "FAIL"){
    //此處應(yīng)該更新一下訂單狀態(tài)，商戶自行增刪操作
    //$this->log_result($log_name, "【業(yè)務(wù)出錯(cuò)】:\n".$xml."\n");
    //更新訂單數(shù)據(jù)【通信出錯(cuò)】設(shè)為無效訂單
    echo &#39;error&#39;;
   }
   else{
    //$this->log_result($log_name, "【支付成功】:\n".$xml."\n");
    //我這里用到一個(gè)process方法，成功返回?cái)?shù)據(jù)后處理，返回地?cái)?shù)據(jù)具體可以參考微信的文檔
    if ($this->process($parameter)) {
     //處理成功后輸出success，微信就不會(huì)再下發(fā)請(qǐng)求了
     echo &#39;success&#39;;
    }else {
     //沒有處理成功，微信會(huì)間隔的發(fā)送請(qǐng)求
     echo &#39;error&#39;;
    }
   }
  }
 }
 //訂單處理
 private function process($parameter) {
  //此處應(yīng)該更新一下訂單狀態(tài)，商戶自行增刪操作
  /*
  * 返回的數(shù)據(jù)最少有以下幾個(gè)
  * $parameter = array(
   &#39;out_trade_no&#39; => xxx,//商戶訂單號(hào)
   &#39;total_fee&#39; => XXXX,//支付金額
   &#39;openid&#39; => XXxxx,//付款的用戶ID
  );
  */
  $data = array(
      &#39;order_sn&#39;=>$parameter[&#39;out_trade_no&#39;],
      &#39;des&#39;=>(&#39;訂單交易：&#39;.$parameter[&#39;out_trade_no&#39;]),
      &#39;money&#39;=>$parameter[&#39;total_fee&#39;],
     );
  orderhandlestarysdgdss($data);//這是一個(gè)common方法，他會(huì)將該訂單狀態(tài)設(shè)置為已支付之類的
  return true;
 }
}
?>

After initiating payment, splice the prepayment data parameters (see the WeChat ordinary merchant developer documentation for the parameter list - WeChat Payment - Unified Order) display page:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0;" name="viewport" />
<meta name="format-detection" content="telephone=no"/> 
<title>下</title>
<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
<meta name="keyword" content="">
<meta name="description" content="">
<script type="text/javascript">
var order_sn = "{$res[&#39;order_sn&#39;]}";
//調(diào)用微信JS api 支付
function jsApiCall(){
 WeixinJSBridge.invoke(
  &#39;getBrandWCPayRequest&#39;,
  <?php echo $jsApiParameters; ?>,
  function(res){
   //如果支付成功
   if (res.err_msg == &#39;get_brand_wcpay_request:ok&#39;) {
    //支付成功后跳轉(zhuǎn)的地址
    location.href = "{:U(&#39;Home/User/my_order&#39;)}";
   }else if (res.err_msg == &#39;get_brand_wcpay_request:cancel&#39;) {
    alert(&#39;請(qǐng)盡快完成支付哦！&#39;);
   }else if (res.err_msg == &#39;get_brand_wcpay_request:fail&#39;) {
    alert(&#39;支付失敗&#39;);
   }else {
    alert(&#39;意外錯(cuò)誤&#39;);
   }
   //WeixinJSBridge.log(res.err_msg);
   //alert(res.err_code+res.err_desc+res.err_msg);
   /*if (res.err_msg == &#39;get_brand_wcpay_request:ok&#39;) {
    alert(&#39;支付成功&#39;);
   }else {
    alert(&#39;取消支付&#39;);
   }*/
  }
 );
}
function callpay(){
 if (typeof WeixinJSBridge == "undefined"){
  if( document.addEventListener ){
   document.addEventListener(&#39;WeixinJSBridgeReady&#39;, jsApiCall, false);
  }else if (document.attachEvent){
   document.attachEvent(&#39;WeixinJSBridgeReady&#39;, jsApiCall); 
   document.attachEvent(&#39;onWeixinJSBridgeReady&#39;, jsApiCall);
  }
 }else{
  jsApiCall();
 }
}
</script>
<style>
*{font-family:&#39;微軟雅黑&#39;,&#39;Microsoft YaHei&#39;;}
body #head{position:relative;z-index:99999999999999;padding:0 10px;}
body .zh-head{padding:0 0 0 0;height:auto;}
.zh-head-conter{position:relative;height:40px;}
.zh-logo{position:absolute;left:50%;top:0;margin:0 0 0 -60px;float:none;width:auto;}
.zh-logo a{display:block;}
.zh-logo img{width:120px;height:40px;display:block;}
.heads_fix .zh-logo{}
#head{position:fixed!important;left:0;top:0;right:0;z-index:99999;background:#fff;border-bottom:1px solid #ddd;}
.zh-logo{height:40px;}
.flowpay{margin-top:25%;}
.flowpay dt{text-align:center;}
.flowpay strong.price{font-size:40px;}
.wxLogo{text-align:center;}
.wxLogo img{}
.flowpay dd{margin:0;padding:20px 0 10px 0;}
.flowpay dd input{margin:0 auto;padding:0;width:90%;height:45px;line-height:45px;border:0;border-radius:4px;background:#0CBC0A;color:#fff;font-size:17px;display:block;-webkit-appearance:none;-moz-appearance:none;appearance:none;outline:none;}
</style>
</head>
<body>
<!--頭部開始-->
<div class="flowpay">
 <dl>
  <dt>
   <p class="wxLogo"><img src="/static/imghw/default1.png"  data-src="__PUBLIC__/home/images/1479953699138120.png"  class="lazy"   alt=""></p>
   本次訂單需支付：￥<strong class="price">{$res[&#39;order_amount&#39;]}</strong> 元
  </dt>
  <dd>
   <input type="button" id="hhhhhh" onclick="callpay()" value="立即支付" />
  </dd>
 </dl>
</div>
<!--尾結(jié)束-->
</body>
</html>

Then there is the class file:

The cacert is the certificate storage directory; the certificate is not necessarily required;

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