我们先看测试页面
如下是代码
<!--index.wxml--> <view class="container"> <view class="container"> <button bindtap='dianji' type="primary">测试支付0.01元</button> </view> </view> // index.js // 获取应用实例 const app = getApp() Page({ data: { motto: 'Hello World', userInfo: {}, hasUserInfo: false, canIUse: wx.canIUse('button.open-type.getUserInfo'), canIUseGetUserProfile: false, openId:'', canIUseOpenData: wx.canIUse('open-data.type.userAvatarUrl') && wx.canIUse('open-data.type.userNickName') // 如需尝试获取用户信息可改为false }, onLoad() { // 微信登录获取openID wx.login({ success:(re)=>{ console.log(re); // 必须是在用户已经授权的情况下调用 wx.getUserInfo({ success: (res)=>{ var data_arr = { code:re.code, appid:' ', //你的APPID iv:res.iv, encryptedData:res.encryptedData, }; // 请求接口 wx.request({ url: 'https://www.xxx.cn/yzxx_openid', header: { 'Content-Type': 'application/x-www-form-urlencoded' }, data:data_arr, method: 'POST', success:(res1)=>{ this.openId = JSON.parse(res1.data.data).openId; } }) } }); } }) }, dianji(){ wx.request({ url: 'https://www.xxx.cn/yzxx_wxpayfee',//请求地址 data:{ id: this.openId,//获取用户openid fee:0.01 //金额 }, header: { 'Content-Type': 'application/x-www-form-urlencoded' }, method: 'POST', success: function (res) { console.log('调起支付'); wx.requestPayment({ 'timeStamp': res.data.timeStamp, 'nonceStr': res.data.nonceStr, 'package': res.data.package, 'signType': 'MD5', 'paySign': res.data.paySign, 'success': function (res) { console.log('success'); wx.showToast({ title: '支付成功', icon: 'success', duration: 3000 }); }, 'fail': function (res) { wx.showToast({ title: '支付失败', icon:'none' }) }, 'complete': function (res) { console.log('complete'); } }); }, fail: function (res) { console.log(res.data) } }); }, })
接下来是我们后台的代码
// 获取openid public function yzxx_openid(){ include_once VENDOR_PATH.'wxBizDataCrypt.php'; $appid=$_POST['appid']; $code=$_POST['code']; $encryptedData=$_POST['encryptedData']; $iv = $_POST['iv']; // 使用code获得session_key if(!empty($code) && !empty($appid) && empty($this->yzxx_sessionKey)){ $url = 'https://api.weixin.qq.com/sns/jscode2session?appid='.$appid.'&secret=SECRET&js_code='.$code.'&grant_type=authorization_code'; $content = json_decode(file_get_contents($url),true); // 保存到类属性中 $this->yzxx_sessionKey = $content['session_key']; } if(empty($appid) || empty($code) || empty($encryptedData) || empty($iv)){ $this->_jsonError('-1','参数错误');exit; } $pc = new \WXBizDataCrypt($appid,$this->yzxx_sessionKey); $errCode = $pc->decryptData($encryptedData, $iv, $data ); if ($errCode == 0) { // 成功 $this->_jsonResult($data);exit; } else { // 失败 $this->_jsonError('-1','获取失败'.$errCode);exit; } } // 支付回调 public function yzxx_notify(){ $postXml = $GLOBALS["HTTP_RAW_POST_DATA"]; //接收微信参数 // 接受不到参数可以使用file_get_contents("php://input"); PHP高版本中$GLOBALS好像已经被废弃了 if (empty($postXml)) { return false; } $attr = $this->xmlToArray($postXml); $total_fee = $attr['total_fee']; $open_id = $attr['openid']; $out_trade_no = $attr['out_trade_no']; $time = $attr['time_end']; } //将xml格式转换成数组 public function xmlToArray($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; } // 获取微信订单号 public function yzxx_wxpayfee(){ include_once VENDOR_PATH. 'Wxpay/WeixinPay.php'; $appid=''; //小程序appid $openid= $_POST['id']; $mch_id=''; //微信支付商户支付号 $key=''; //Api密钥 $out_trade_no = $mch_id.time(); $total_fee = $_POST['fee']; // 金额 if (empty($total_fee)) { //押金 $this->_jsonError('-1','参数错误');exit; } else { $body = "支付金额"; $total_fee = floatval($total_fee*100); // 由于微信中的金额是以分为单位所以要乘100 } $weixinpay = new \WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee); $return=$weixinpay->pay(); echo json_encode($return); }
我把那个支付类也给大家准备好了，如下代码
<?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' => '2018013106125348', //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' => 'https://www.xxx.cn/yzxx_notify', //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) { $xml = "<xml>"; foreach ($arr as $key => $val) { if (is_array($val)) { $xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">"; } else { $xml .= "<" . $key . ">" . $val . "</" . $key . ">"; } } $xml .= "</xml>"; 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; } } ?>
支付成功之后回调地址需要在微信商户平台配置，这一点要注意（我们需要在回调里面将订单状态改变）
感谢大家观看，我们下次见。
