uniapp基于JSSDK开发微信支付（php后端）

安装环境

- NPM安装方式 npm install jweixin-module --save

重要文件jssdk.php

<?php class JSSDK { private $appId; private $appSecret; public function __construct($appId, $appSecret) { $this->appId = $appId; $this->appSecret = $appSecret; } public function getSignPackage() { $jsapiTicket = $this->getJsApiTicket(); // 注意 URL 一定要动态获取，不能 hardcode. $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? " " : "http://"; $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]"; $timestamp = time(); $nonceStr = $this->createNonceStr(); // 这里参数的顺序要按照 key 值 ASCII 码升序排序 $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url"; $signature = sha1($string); $signPackage = array( "appId" => $this->appId, "nonceStr" => $nonceStr, "timestamp" => $timestamp, "url" => $url, "signature" => $signature, "rawString" => $string ); return $signPackage; } private function createNonceStr($length = 16) { $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; $str = ""; for ($i = 0; $i < $length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } private function getJsApiTicket() { // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例 $data = json_decode($this->get_php_file(dirname(__FILE__) . "/jsapi_ticket.php")); if ($data->expire_time < time()) { $accessToken = $this->getAccessToken(); // 如果是企业号用以下 URL 获取 ticket // $url = " qyapi.weixin.qq /cgi-bin/get_jsapi_ticket?access_token=$accessToken"; $url = " api.weixin.qq /cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken"; $res = json_decode($this->httpGet($url)); $ticket = $res->ticket; if ($ticket) { $data->expire_time = time() + 7000; $data->jsapi_ticket = $ticket; $this->set_php_file(dirname(__FILE__) . "/jsapi_ticket.php", json_encode($data)); } } else { $ticket = $data->jsapi_ticket; } return $ticket; } private function getAccessToken() { //全局调用（防access_token过期） global $access_token_mp; if(!$access_token_mp){ return access_token_mp(); } return $access_token_mp; /* // access_token 应该全局存储与更新，以下代码以写入到文件中做示例 $data = json_decode($this->get_php_file(dirname(__FILE__) . "/access_token.php")); if ($data->expire_time < time()) { // 如果是企业号用以下URL获取access_token // $url = " qyapi.weixin.qq /cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret"; $url = " api.weixin.qq /cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret"; $res = json_decode($this->httpGet($url)); $access_token = $res->access_token; if ($access_token) { $data->expire_time = time() + 7000; $data->access_token = $access_token; $this->set_php_file(dirname(__FILE__) . "/access_token.php", json_encode($data)); } } else { $access_token = $data->access_token; } return $access_token; */ } private function httpGet($url) { $curl = curl_init(); curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_TIMEOUT, 500); // 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。 // 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true); curl_setopt($curl, CURLOPT_URL, $url); $res = curl_exec($curl); curl_close($curl); return $res; } private function get_php_file($filename) { return trim(substr(file_get_contents($filename), 15)); } private function set_php_file($filename, $content) { $fp = fopen($filename, "w"); fwrite($fp, "<?php exit();?>" . $content); fclose($fp); } }

JSSDK php获取配置

include("jssdk.php"); //微信公众号AppID、AppSecret $jssdk = new JSSDK(AppID, AppSecret); $signPackage = $jssdk->GetSignPackage(); //回调传参 $infoArray["subjects"]["wxpalay"]["appId"] = $signPackage["appId"]; $infoArray["subjects"]["wxpalay"]["timestamp"] = $signPackage["timestamp"]; $infoArray["subjects"]["wxpalay"]["nonceStr"] = $signPackage["nonceStr"]; $infoArray["subjects"]["wxpalay"]["signature"] = $signPackage["signature"];

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index.js文件  

var app = getApp() var jWeixin = require('jweixin-module') export default { name: 'index', data() { return { wxpalay: {} } }, onLoad(options) { var that = this //加载配置信息，请求接口自己定义 that.$https(that, { url: app.globalData.swtBase + "/h5/home.php?act=main", //data: formDatas, // downRefresh9: true, loading: true, //member: true, // method: 'POST' }, function(that, data) { var mainDatas = data.subjects; that.wxpalay = mainDatas.wxpalay; //初始化微信支付配置 if (mainDatas.wxpalay.appId) { // 配置 JSSDK jWeixin.config({ debug: false, appId: mainDatas.wxpalay.appId, timestamp: mainDatas.wxpalay.timestamp, nonceStr: mainDatas.wxpalay.nonceStr, signature: mainDatas.wxpalay.signature, jsApiList: ['chooseWXPay'] }); jWeixin.error((res) => { console.log('JSSDK 配置失败', res); }); } }); }, methods: { /** * 发起微信下单接口 */ onBindSubmitCallback: function(that, data) { var danhao = data.danhao; //去支付 that.$https(that, { url: app.globalData.swtBase + "play.php", //data: , // downRefresh9: true, loading: true, member: true, // method: 'POST' }, that.paySuccessCallback); }, //下单回调 paySuccessCallback: function(that, data) { // 发起微信支付 jWeixin.ready(() => { // 调起支付 jWeixin.chooseWXPay({ timestamp: data.subjects.timeStamp, nonceStr: data.subjects.nonceStr, package: data.subjects.package, signType: data.subjects.signType, paySign: data.subjects.paySign, success: (res) => { wx.hideLoading(); util.showModal("支付成功，积分已到账。请进入小程序查看"); that.userInfo.jifen = data.subjects.jifen; }, fail: (res) => { console.error('支付失败', res); wx.hideLoading(); } }); }); }, } }

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play.php发起下单文件 参考下载链接：PHP微信支付V2

<?php $infoArray = array(); $infoArray["subjects"] = array(); include_once("wxpay/WxPayPubHelper/WxPayPubHelper.php"); $jsApi = new JsApi_pub(); $unifiedOrder = new UnifiedOrder_pub(); $unifiedOrder->setParameter("openid", $openid); $unifiedOrder->setParameter("body", "" . $web_gz_wxapp . "_订单支付" . $ShopJine . "元_订单号：" . $rsDG["danhao"] . ""); //商品描述 $unifiedOrder->setParameter("out_trade_no", '支付单号'); $unifiedOrder->setParameter("total_fee", '支付金额'); $unifiedOrder->setParameter("notify_url", WxPayConf_pub::NOTIFY_URL);//回调通知地址 $unifiedOrder->setParameter("trade_type", "JSAPI"); $prepay_id = $unifiedOrder->getPrepayId(); //$infoArray["aa"] = $unifiedOrder; $jsApi->setPrepayId($prepay_id); $jsApiParameters = $jsApi->getParameters(); //$infoArray["bb"] = $jsApiParameters; //合并数组 $payArray = json_decode($jsApiParameters, true); $infoArray["subjects"] = array_merge($infoArray["subjects"], $payArray);