小程序端
/** * 微信支付接口 */ wxPaymoney:function (out_trade_no, true_money){ //out_trade_no 后台统一下单接口需要用 var that = this wx.hideToast() //隐藏toast wx.request({ method: 'POST', data: { openid: '************', //调用人的openid out_trade_no: out_trade_no, body: '答题奖金', no****rl: 'https://www.q**************.php',//后台接口自动修改订单状态 t*****e: true_money //支付金额 }, url: 'https://b***************gn.php', //服务器接口（微信统一下单接口） header: { 'Content-Type': 'application/x-www-form-urlencoded' }, success: function (res) { console.log(res.data) console.log('调起支付') wx.requestPayment({ //成功之后，调用小程序微信支付 'timeStamp': res.data.timeStamp, 'nonceStr': res.data.nonceStr, 'package': res.data.package, 'signType': 'MD5', 'paySign': res.data.paySign, success: function (res) { console.log(res) wx.showToast({ title: '支付成功', icon: 'success', duration: 3000 }) }, fail: function (res) { console.log('付款失败'); wx.showModal({ title: '提醒', content: '付款失败,如要出题请重新编辑题目', showCancel: false, success:function(){ wx.redirectTo({ url: '/pa*******ndex', }) } }) return }, }) }, fail: function (res) { console.log(res.data) } }) }
服务器端
<?php $appid='********'; //准备数据（都在后台系统中可查到） $mch_id='12******02'; //商户号 $key='lk******aFK12'; $openid = trim($_POST['openid']); //$out_trade_no = $mch_id.time(); $out_trade_no = trim($_POST['out_trade_no']); //$body = "答题奖金"; $body = $_POST['body']; //$notify_url = 'http://w***************y.php'; $notify_url = trim($_POST['notify_url']); $to**ee = floatval($_POST['to****e']); $str = var_export($_POST,true); file_put_contents("set.txt",$str."\n",FILE_APPEND); $weixinpay = new WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$to****,$notify_url); $return=$weixinpay->pay(); echo json_encode($return); /* * 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,$notify_url) { $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; $this->notify_url = $notify_url; } public function pay() { //统一下单接口 $return = $this->weixinapp(); return $return; } //微信小程序接口 private function weixinapp() { //统一下单接口 $unifiedorder = $this->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; } //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' => $this->body, 'out_trade_no'=> $this->out_trade_no, 'total_fee' => $this->t***ee, 'spbill_create_ip' => '1****8', //终端IP 'notify_url' => $this->notify_url, //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 $val; } //作用：产生随机字符串，不长于32位 private function createNoncestr($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; } } ?>
