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

 x.request({
 url: 'https://.yourhost./eixin/WeiActivity/payJoinfee',//改成你自己的链接
 header: {
   'Content-Type': 'application/x--form-urlencoded'
 },
 method:'POST',
 suess: function(res) {
   console.log(res.data);
   console.log('调起支付');
   x.requestPayment({
 'timeStamp': res.data.timeStamp,
 'nonceStr': res.data.nonceStr,
 'package': res.data.package,
 'signType': 'MD5',
 'paySign': res.data.paySign,
 'suess':function(res){
   console.log('suess');
   x.shoToast({
  title: '支付成功',
  icon: 'suess',
  duration: 3000
   });
 },
 'fail':function(res){
   console.log('fail');
 },
 'plete':function(res){
   console.log('plete');
 }
   });
 },
 fail:function(res){
   console.log(res.data)
 }
  });

后端代码

//支付费用
 public function payJoinfee(){
 $appid='x888888888';
 $openid='oCQY0Q_pzrQpu8888888';
 $mch_id='141388888';
 $key='9A0A86888888888';
 
 import('Weixin.Lib.WeixinPay');
 $eixinpay = ne WeixinPay($appid,$openid,$mch_id,$key);
 $return=$eixinpay->pay();

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

微信支付类

appid=$appid;
 $this->openid=$openid;
 $this->mch_id=$mch_id;
 $this->key=$key;
 } 
 public function pay(){
 //统一下单接口
 $return=$this->eixinapp();
 return $return;
 }
 //统一下单接口
 private function unifiedorder(){
 $url='https://api.mch.eixin.qq./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(0.01100),//总金额 单位 分
  'spbill_create_ip'=>$_SERVER['REMOTE_ADDR'],//终端IP
  'notify_url'=>'http://.eixin.qq./xpay/pay.php',//通知地址
  'openid'=>$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 eixinapp(){
 //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 = "abcdefghijklmnopqrstuvxyz0123456789"; 
 $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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