微信小程序支付PHP代码

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 确保外网能正常访问
   '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 = "abcdefghijklmnopqrstuvwxyz0123456789";
  $str = "";
  for ($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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