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：

rush:js;"> 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：

import('Weixin.Lib.WeixinPay');
$weixinpay = new \WeixinPay($appid,$openid,$mch_id,$key);
$return=$weixinpay->pay();

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

微信支付类

rush:PHP;"> 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,strlen($buff)-1);
}
return $reqPar;
}
}

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