微信小程序 支付功能实现PHP实例详解

前端代码：

wx.request({ url: 'https:///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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