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/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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