Detailed explanation of steps to implement jsapi payment and refund using PHP

This time I will bring you a detailed explanation of the steps to implement jsapi payment and refund in PHP. What are the precautions for PHP to implement jsapi payment and refund. The following is a practical case, let's take a look.

Preliminary preparation:

1. Of course, you still need to have a WeChat authentication service account and activate WeChat payment;

2. Configure the payment authorization directory in the WeChat merchant backend, and prepare the payment Api certificate (not used for payment, used when refunding)

3. If you call the interface for payment, you must first You know the user's openid, so you first need to know how to get the user's openid. This is also very simple. I have also written an article before about how to get the user's openid. For details, see the article WeChat public account to get the user's openid.

Okay, without further ado, just paste the main code:

/** 
 * 微信支付请求接口(POST) 
 * @param string $openid openid 
 * @param string $body 商品简单描述 
 * @param string $order_sn 订单编号 
 * @param string $total_fee 金额 
 * @return json的数据 
 */ 
public function wxpay($openid,$total_fee,$body,$order_sn){ 
 $config = $this->config; 
 //统一下单参数构造 
 $unifiedorder = array( 
 'appid' => $config['appid'], 
 'mch_id' => $config['mch_id'], 
 'nonce_str' => self::getNonceStr(), 
 'body' => $body, 
 'out_trade_no' => $order_sn, 
 'total_fee' => $total_fee * 100, 
 'spbill_create_ip' => self::getip(), 
 'notify_url' => 'http://'.$_SERVER['HTTP_HOST'].'/notify.php', 
 'trade_type' => 'JSAPI', 
 'openid' => $openid 
 ); 
 $unifiedorder['sign'] = self::makeSign($unifiedorder); 
 //return $unifiedorder; 
 //请求数据,统一下单 
 $xmldata = self::array2xml($unifiedorder); 
 $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder'; 
 $res = self::curl_post_ssl($url, $xmldata); 
 if(!$res){ 
 return array('status'=>0, 'msg'=>"Can't connect the server" ); 
 } 
 // 这句file_put_contents是用来查看服务器返回的结果 测试完可以删除了 
 //file_put_contents('./log.txt',$res,FILE_APPEND); 
 $content = self::xml2array($res); 
 if(strval($content['result_code']) == 'FAIL'){ 
 return array('status'=>0, 'msg'=>strval($content['err_code']).':'.strval($content['err_code_des'])); 
 } 
 if(strval($content['return_code']) == 'FAIL'){ 
 return array('status'=>0, 'msg'=>strval($content['return_msg'])); 
 } 
 $time = time(); 
 settype($time, "string"); //jsapi支付界面,时间戳必须为字符串格式 
 $resdata = array( 
 'appId' => strval($content['appid']), 
 'nonceStr' => strval($content['nonce_str']), 
 'package' => 'prepay_id='.strval($content['prepay_id']), 
 'signType' => 'MD5', 
 'timeStamp' => $time 
 ); 
 $resdata['paySign'] = self::makeSign($resdata); 
 return json_encode($resdata); 
} 
/** 
 * 微信退款(POST) 
 * @param string(28) $transaction_id 在微信支付的时候,微信服务器生成的订单流水号,在支付通知中有返回 
 * @param string $out_refund_no 商品简单描述 
 * @param string $total_fee 微信支付的时候支付的总金额(单位:分) 
 * @param string $refund_fee 此次要退款金额(单位:分) 
 * @return string  xml格式的数据 
 */ 
public function refund($transaction_id,$out_refund_no,$total_fee,$refund_fee){ 
 $config = $this->config; 
 //退款参数 
 $refundorder = array( 
 'appid' => $config['appid'], 
 'mch_id' => $config['mch_id'], 
 'nonce_str' => self::getNonceStr(), 
 'transaction_id'=> $transaction_id, 
 'out_refund_no' => $out_refund_no, 
 'total_fee' => $total_fee * 100, 
 'refund_fee' => $refund_fee * 100 
 ); 
 $refundorder['sign'] = self::makeSign($refundorder); 
 //请求数据,进行退款 
 $xmldata = self::array2xml($refundorder); 
 $url = 'https://api.mch.weixin.qq.com/secapi/pay/refund'; 
 $res = self::curl_post_ssl($url, $xmldata); 
 if(!$res){ 
 return array('status'=>0, 'msg'=>"Can't connect the server" ); 
 } 
 // 这句file_put_contents是用来查看服务器返回的结果 测试完可以删除了 
 //file_put_contents('./log3.txt',$res,FILE_APPEND); 
 $content = self::xml2array($res); 
 if(strval($content['result_code']) == 'FAIL'){ 
 return array('status'=>0, 'msg'=>strval($content['err_code']).':'.strval($content['err_code_des'])); 
 } 
 if(strval($content['return_code']) == 'FAIL'){ 
 return array('status'=>0, 'msg'=>strval($content['return_msg'])); 
 } 
 return $content; 
}

This is an encapsulated class, and it is super simple to use:

<?php  
require_once "wxpay.class.php"; 
$config = array( 
 &#39;wxappid&#39; => 'wx123456789876', 
 'mch_id' => '123456789', 
 'pay_apikey' => '123456789876123456789876123456789876' 
); 
$wxpay = new WxPay($config); 
$result = $wxpay->paytest(); 
?> 
 
 
 <meta> 
 <meta> 
 <title>江南极客支付</title> 
 <script> 
 //调用微信JS api 支付 
 function jsApiCall() 
 { 
 WeixinJSBridge.invoke( 
 &#39;getBrandWCPayRequest&#39;,<?php echo $result; ?>, 
 function(res){ 
 WeixinJSBridge.log(res.err_msg); 
 //alert(res); 
 if(res.err_msg == "get_brand_wcpay_request:ok"){ 
  alert("支付成功!"); 
 }else if(res.err_msg == "get_brand_wcpay_request:cancel"){ 
  alert("用户取消支付!"); 
 }else{ 
  alert("支付失败!"); 
 } 
 } 
 ); 
 } 
 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> 
 
 
 <br> 
 <font><b>该笔订单支付金额为<span>1分</span>钱</b></font><br><br> 
 <font><b><span>1分</span>钱也是爱</b></font><br><br> 
 <p> 
 <button>果断买买买^_^</button> 
 </p> 
 

As for the payment callback Verification, I won’t go into details here. If you don’t understand, you can read the process of implementing WeChat payment (jsapi payment) in ThinkPHP. Here is a detailed explanation of how to handle callbacks.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

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The above is the detailed content of Detailed explanation of steps to implement jsapi payment and refund using PHP. For more information, please follow other related articles on the PHP Chinese website!