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; } }