PHP 小程序中微信支付

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PHP 小程序中微信支付

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openIDwx.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APPIDiv:res.iv,encryptedData:res.encryptedData,};// 请求接口wx.request({url: '',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: '',//请求地址data:{id: this.openId,//获取用户openidfee: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openidpublic 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)){$url = '='.$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 = '';$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' => '', //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($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验//设置headercurl_setopt($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:$error");}}//数组转换成xmlprivate function arrayToXml($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。

本文标签： PHP 小程序中微信支付