小程序访问地址：
payfee.php:
include'WeixinPay.php';
$appid='';
$openid= $_GET['id'];
$mch_id='';
$key='';
$out_trade_no = $mch_id. time();
$total_fee = $_GET['fee'];
if(empty($total_fee))//押金
{
$body ="充值押金";
$total_fee = floatval(99*100);
}
else{
$body ="充值余额";
$total_fee = floatval($total_fee*100);
}
$weixinpay =newWeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee);
$return=$weixinpay->pay();
echojson_encode($return);
WeixinPay.php:
/*
* 小程序微信支付
*/
classWeixinPay{
protected$appid;
protected$mch_id;
protected$key;
protected$openid;
protected$out_trade_no;
protected$body;
protected$total_fee;
function__construct($appid, $openid, $mch_id, $key,$out_trade_no,$body,$total_fee){
$this->appid = $appid;
$this->openid = $openid;
$this->mch_id = $mch_id;
$this->key = $key;
$this->out_trade_no = $out_trade_no;
$this->body = $body;
$this->total_fee = $total_fee;
}
publicfunctionpay(){
//统一下单接口
$return =$this->weixinapp();
return$return;
}
//统一下单接口
privatefunctionunifiedorder(){
$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' => 'test', //商品描述
'body'=>$this->body,
// 'out_trade_no' => '2015450806125348', //商户订单号
'out_trade_no'=>$this->out_trade_no,
// 'total_fee' => floatval(0.01 * 100), //总金额 单位 分
'total_fee'=>$this->total_fee,
// 'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
'spbill_create_ip'=>'192.168.0.161',//终端IP
'notify_url'=>'http://www.weixin.qq.com/wxpay/pay.php',//通知地址 确保外网能正常访问
'openid'=>$this->openid,//用户id
'trade_type'=>'JSAPI'//交易类型
);
//统一下单签名
$parameters['sign'] =$this->getSign($parameters);
$xmlData =$this->arrayToXml($parameters);
$return =$this->xmlToArray($this->postXmlCurl($xmlData, $url,60));
return$return;
}
privatestaticfunctionpostXmlCurl($xml, $url, $second =30)
{
$ch = curl_init();
//设置超时
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,FALSE);//严格校验
//设置header
curl_setopt($ch, CURLOPT_HEADER,FALSE);
//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER,TRUE);
//post提交方式
curl_setopt($ch, CURLOPT_POST,TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT,20);
curl_setopt($ch, CURLOPT_TIMEOUT,40);
set_time_limit(0);
//运行curl
$data = curl_exec($ch);
//返回结果
if($data) {
curl_close($ch);
return$data;
}else{
$error = curl_errno($ch);
curl_close($ch);
thrownewWxPayException("curl出错，错误码:$error");
}
}
//数组转换成xml
privatefunctionarrayToXml($arr){
$xml ="";
foreach($arras$key => $val) {
if(is_array($val)) {
$xml .="<". $key .">". arrayToXml($val) ."";
}else{
$xml .="<". $key .">". $val ."";
}
}
$xml .="";
return$xml;
}
//xml转换成数组
privatefunctionxmlToArray($xml){
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$xmlstring = simplexml_load_string($xml,'SimpleXMLElement', LIBXML_NOCDATA);
$val = json_decode(json_encode($xmlstring),true);
return$val;
}
//微信小程序接口
privatefunctionweixinapp(){
//统一下单接口
$unifiedorder =$this->unifiedorder();
// print_r($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
privatefunctioncreateNoncestr($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
privatefunctiongetSign($Obj){
foreach($Objas$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$result_;
}
///作用：格式化参数，签名过程需要使用
privatefunctionformatBizQueryParaMap($paraMap, $urlencode){
$buff ="";
ksort($paraMap);
foreach($paraMapas$k => $v) {
if($urlencode) {
$v = urlencode($v);
}
$buff .= $k ."=". $v ."&";
}
$reqPar;
if(strlen($buff) >0) {
$reqPar = substr($buff,0, strlen($buff) -1);
}
return$reqPar;
}
}
小程序页面处理：
wx.request({
url:'https://www.yourhost.com/weixin/WeiActivity/payfee.php',//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)
}
});
回调url:notify.php
$postXml = $GLOBALS["HTTP_RAW_POST_DATA"];//接收微信参数
if(empty($postXml)) {
returnfalse;
}
//将xml格式转换成数组
functionxmlToArray($xml){
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$xmlstring = simplexml_load_string($xml,'SimpleXMLElement', LIBXML_NOCDATA);
$val = json_decode(json_encode($xmlstring),true);
return$val;
}
$attr = xmlToArray($postXml);
$total_fee = $attr[total_fee];
$open_id = $attr[openid];
$out_trade_no = $attr[out_trade_no];
$time = $attr[time_end];
以上几步你就可以完成小程序的微信支付与php完美的结合起来
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