微信小程序与php 实现微信支付的简单实例

微信小程序与php 实现微信支付的简单实例

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);
}
$weixinpay = new WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee);
$return=$weixinpay->pay();

echo json_encode($return);

WeixinPay.php:

<?php

/*
* 小程序微信支付
*/

class WeixinPay {

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;
 }

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' => '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;
 }

private static function postXmlCurl($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($ch);
     throw new WxPayException("curl出错，错误码:$error");
   }
 }

//数组转换成xml
 private function arrayToXml($arr) {
   $xml = "<root>";
   foreach ($arr as $key => $val) {
     if (is_array($val)) {
       $xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">";
     } else {
       $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
     }
   }
   $xml .= "</root>";
   return $xml;
 }

//xml转换成数组
 private function xmlToArray($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
 private function weixinapp() {
   //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
 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;
 }

}

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)) {
 return false;
}

//将xml格式转换成数组
function xmlToArray($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

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！

来源：http://blog.csdn.net/admin1008611/article/details/73240458