微信小程序 支付功能实现PHP实例详解

微信小程序支付功能实现PHP实例详解前端代码：wx.request({url:'https://www.yourhost.com/weixin/WeiActiv

微信小程序 支付功能实现PHP实例详解

前端代码：

 wx.request({
 url: 'https://www.yourhost.com/weixin/WeiActivity/payJoinfee',//改成你自己的链接
 header: {
 'Content-Type': 'application/x-www-form-urlencoded'
 },
 method:'POST',
 success: function(res) {
 console.log(res.data);
 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){
 console.log('fail');
 },
 'complete':function(res){
 console.log('complete');
 }
 });
 },
 fail:function(res){
 console.log(res.data)
 }
 });

后端代码：

//支付费用
 public function payJoinfee(){
 $appid='wx888888888';
 $openid='oCQwY0Q_pzrQpu8888888';
 $mch_id='141388888';
 $key='9A0A86888888888';
 
 import('Weixin.Lib.WeixinPay');
 $weixinpay = new \WeixinPay($appid,$openid,$mch_id,$key);
 $return=$weixinpay->pay();

 $this->response($return,'json');
 }

微信支付类

<?php
/*
 * 小程序微信支付
 */
class WeixinPay{
 protected $appid;
 protected $mch_id;
 protected $key;
 protected $openid;
 function __construct($appid,$openid,$mch_id,$key){
 $this->appid=$appid;
 $this->openid=$openid;
 $this->mch_id=$mch_id;
 $this->key=$key;
 } 
 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'=>'测试',//商品描述
 'out_trade_no'=>'2015450806125346',//商户订单号
 'total_fee'=>floatval(0.01*100),//总金额 单位 分
 'spbill_create_ip'=>$_SERVER['REMOTE_ADDR'],//终端IP
 'notify_url'=>'http://www.weixin.qq.com/wxpay/pay.php',//通知地址
 'openid'=>$this->openid,//用户id
 'trade_type'=>'JSAPI'//交易类型
 );
 //统一下单签名
 $parameters['sign']=$this->getSign($parameters);
 $xmlData=arrayToXml($parameters);
 
 $return=xmlToArray(postXmlSSLCurl($xmlData,$url,60));
 
 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 $parameters;
 }
 //作用：产生随机字符串，不长于32位
 private function createNoncestr($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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