本文实例为大家分享了微信小程序支付PHP具体代码，供大家参考，具体内容如下

服务器端获取 openid

Getopenid.php

<?php
 header('Content-type: application/json; charset=UTF-8');
 $APPID="";//填写小程序appid
 $SECRET="";//填写小程序secret
 $JSCODE="";
 if(isset($_GET['js_code'])){
 $JSCODE=$_GET['js_code'];
 $url="https://api.weixin.qq.com/sns/jscode2session?appid=".$APPID
 ."&secret=".$SECRET."&js_code=".$JSCODE."&grant_type=authorization_code";
 $curl = curl_init();
 curl_setopt($curl, CURLOPT_URL, $url);
 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($curl, CURLOPT_HEADER, 0);
 $data = curl_exec($curl);
 $array=json_decode($data,true);

 curl_close($curl);
 $openid=isset($array['openid'])?$array['openid']:$array['errcode'];
 if($openid=="40029"){
 $response["result"] = 0;
 $response["msg"] = "invalid code";
 $response["openid"] = $openid;
 echo json_encode($response);
 }else{
 $response["result"] = 1;
 $response["msg"] = "user exist";
 $response["openid"] = $openid;
 echo json_encode($response);
 }
 }

小程序存储openid
在app.js中

getUserInfo:function(cb){
 var that = this
 if(this.globalData.userInfo){
 typeof cb == "function" && cb(this.globalData.userInfo)
 }else{
 wx.login({
 success: function (res) {
 if (res.code) {
 var code = res.code;
 wx.getUserInfo({
 success: function (res2) {
 console.log(res2);
 that.globalData.userInfo = res2.userInfo;
 typeof cb == "function" && cb(that.globalData.userInfo)
 var encryptedData = encodeURIComponent(res2.encryptedData);//一定要把加密串转成URI编码
 var iv = res2.iv;
 //请求自己的服务器
 //Login(code, encryptedData, iv);
 wx.showToast({
 title: '正在登录...',
 icon: 'loading',
 duration: 10000
 });
 //请求服务器
 wx.request({
 url: API_URL,//Getopenid.php
 data: {
 js_code: code,
 },
 method: 'GET',
 header: {
 'content-type': 'application/json'
 }, // 设置请求的 header
 success: function (res) {
 // success
 wx.hideToast();
 console.log("JSON:" + res.data);
 if (res.data.result=="1"){//获取openid成功
 wx.setStorage({//存储openid
 key: "openid",
 data: res.data.openid
 })
 }else{
 wx.showToast({
 title: 'openid获取失败',
 icon: 'none',
 duration: 2000
 })
 }
 console.log('服务器返回' + res.data.result);
 console.log('服务器返回' + res.data.msg);
 console.log('服务器返回' + res.data.openid);
 },
 fail: function () {
 // fail
 // wx.hideToast();
 },
 complete: function () {
 // complete
 }
 })
 }
 })
 } else {
 console.log('获取用户登录态失败！' + res.errMsg)
 }
 }
 })
 }
 }

在登陆界面获取openid

var app = getApp()
onLoad: function () {
 console.log('onLoad')
 var that = this
 //调用应用实例的方法获取全局数据
 app.getUserInfo(function(userInfo){//获取用户信息 
 //更新数据
 that.setData({
 userInfo:userInfo
 })
 })
}

通过以上步骤已经获取到openid

支付方法小程序

pay() {
 var that = this;
 if (this.data.totalPrice == 0) {
 return;
 }
 wx.getStorage({//获取存储在本地的openid
 key: 'openid',
 success: function (res) {
 console.log(res.data)
 that.setData({
 openid:res.data,
 })
 var carArray = that.data.carArray;
 var str="";
 for (var i = 0; i < carArray.length; i++) {
 str=str+ carArray[i].num+"个" + carArray[i].name+" ";
 }
 wx.request({
 url: 'Pay.php',//支付接口
 data: {
 openid: res.data,//openid
 total_fee: that.data.totalPrice,//总金额
 body: str,//商品描述
 },
 method:'GET',
 success:function(res){
 console.log(res.data['timeStamp'])
 if(res.data){
 wx.requestPayment({
 'timeStamp': res.data['timeStamp'],
 'nonceStr': res.data['nonceStr'],
 'package': res.data['package'],
 'signType': 'MD5',
 'paySign': res.data['paySign'],
 'success': function (res) {
 wx.showToast({
 title: '支付成功',
 icon: 'succes',
 duration: 1000,
 mask: true
 })
 //支付成功后在数据库减去购买商品的数量
 var carArray = that.data.carArray;
 for (var i = 0; i < carArray.length; i++) {
 that.setData({
 jiesuan_num: carArray[i].num,
 jiesuan_id: carArray[i].goods_id,
 })
 DeGood(that);
 }
 },
 'fail': function (res) {
 wx.showToast({
 title: '支付失败',
 icon: 'none',
 duration: 1000,
 mask: true
 })
 }
 })
 }
 }
 })
 }
 })
 },

Pay.php

<?php
 include 'WeixinPay.php'; 
 $appid=''; //小程序appid
 $openid= $_GET['openid']; 
 $mch_id=''; //商户id
 $key=''; //商户key
 $out_trade_no = $mch_id. time(); 
 $total_fee = $_GET['total_fee']; 
 $body= $_GET['body'];
 if(empty($total_fee)){ 
 $body = $body; 
 $total_fee = floatval(99*100); 
 }else{ 
 $body = $body; 
 $total_fee = floatval($total_fee*100); 
 } 
 $weixinpay = new WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee); 
 $return=$weixinpay->pay(); 
 echo json_encode($return); 

WeixinPay.php

<?php


/*
 * 小程序微信支付
 */


class WeixinPay {


 protected $appid;
 protected $mch_id;
 protected $key;
 protected $openid;
 protected $out_trade_no;
 protected $body;
 protected $total_fee;
 function __construct($appid, $openid, $mch_id, $key,$out_trade_no,$body,$total_fee) {
 $this->appid = $appid;
 $this->openid = $openid;
 $this->mch_id = $mch_id;
 $this->key = $key;
 $this->out_trade_no = $out_trade_no;
 $this->body = $body;
 $this->total_fee = $total_fee;
 }


 public function pay() {
 //统一下单接口
 $return = $this->weixinapp();
 return $return;
 }


 //统一下单接口
 private function unifiedorder() {
 $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
 $parameters = array(
 'appid' => $this->appid, //小程序ID
 'mch_id' => $this->mch_id, //商户号
 'nonce_str' => $this->createNoncestr(), //随机字符串
// 'body' => 'test', //商品描述
 'body' => $this->body,
// 'out_trade_no' => '2015450806125348', //商户订单号
 'out_trade_no'=> $this->out_trade_no,
// 'total_fee' => floatval(0.01 * 100), //总金额 单位 分
 'total_fee' => $this->total_fee,
// 'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
 'spbill_create_ip' => '192.168.0.161', //终端IP
 'notify_url' => 'http://www.weixin.qq.com/wxpay/pay.php', //通知地址 确保能正常访问
 'openid' => $this->openid, //用户id
 'trade_type' => 'JSAPI'//交易类型
 );
 //统一下单签名
 $parameters['sign'] = $this->getSign($parameters);
 $xmlData = $this->arrayToXml($parameters);
 $return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
 return $return;
 }


 private static function postXmlCurl($xml, $url, $second = 30) 
 {
 $ch = curl_init();
 //设置超时
 curl_setopt($ch, CURLOPT_TIMEOUT, $second);
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
 curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
 //设置header
 curl_setopt($ch, CURLOPT_HEADER, FALSE);
 //要求

结果为字符串且输出到屏幕上 curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); //post提交方式 curl_setopt($ch, CURLOPT_POST, TRUE); curl_setopt($ch, CURLOPT_POSTFIELDS, $xml); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20); curl_setopt($ch, CURLOPT_TIMEOUT, 40); set_time_limit(0); //运行curl $data = curl_exec($ch); //返回结果 if ($data) { curl_close($ch); return $data; } else { $error = curl_errno($ch); curl_close($ch); throw new WxPayException("curl出错，错误码:$error"); } } //数组转换成xml private function arrayToXml($arr) { $xml = "<root>"; foreach ($arr as $key => $val) { if (is_array($val)) { $xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">"; } else { $xml .= "<" . $key . ">" . $val . "</" . $key . ">"; } } $xml .= "</root>"; return $xml; } //xml转换成数组 private function xmlToArray($xml) { //禁止引用外部xml实体 libxml_disable_entity_loader(true); $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA); $val = json_decode(json_encode($xmlstring), true); return $val; } //微信小程序接口 private function weixinapp() { //统一下单接口 $unifiedorder = $this->unifiedorder(); // print_r($unifiedorder); $parameters = array( 'appId' => $this->appid, //小程序ID 'timeStamp' => '' . time() . '', //时间戳 'nonceStr' => $this->createNoncestr(), //随机串 'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //数据包 'signType' => 'MD5'//签名方式 ); //签名 $parameters['paySign'] = $this->getSign($parameters); return $parameters; } //作用：产生随机字符串，不长于32位 private function createNoncestr($length = 32) { $chars = "abcdefghijklmnopqrstuvwxyz01234567"; $str = ""; for ($i = 0; $i < $length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } //作用：生成签名 private function getSign($Obj) { foreach ($Obj as $k => $v) { $Parameters[$k] = $v; } //签名步骤一：按字典序排序参数 ksort($Parameters); $String = $this->formatBizQueryParaMap($Parameters, false); //签名步骤二：在string后加入KEY $String = $String . "&key=" . $this->key; //签名步骤三：MD5加密 $String = md5($String); //签名步骤四：所有字符转为大写 $result_ = strtoupper($String); return $result_; } ///作用：格式化参数，签名过程需要使用 private function formatBizQueryParaMap($paraMap, $urlencode) { $buff = ""; ksort($paraMap); foreach ($paraMap as $k => $v) { if ($urlencode) { $v = urlencode($v); } $buff .= $k . "=" . $v . "&"; } $reqPar; if (strlen($buff) > 0) { $reqPar = substr($buff, 0, strlen($buff) - 1); } return $reqPar; } }

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