最近开发小程序，一直在看小程序的支付。经过一天的努力，小程序支付功能最终实现了。
下面感谢 csdn 博主：千堆雪惹尘埃 发布的 " 小程序与php 实现微信支付 "
原文地址：
http://blog.csdn.net/admin1008611/article/details/73240458
下面是我自己写的代码：使用的 thinkphp：其他的可以参考修改：
服务端：
获取用户的 openid：
public function get_openid(){
$data = array();
$url = "https://api.weixin.qq.com/sns/jscode2session";
$data['appid'] = I('get.appid','','trim'); // 小程序的app_id $data['secret'] = I('get.secret','','trim'); //小程序的 app_secret $data['js_code'] = I('get.js_code','','trim');
$data['grant_type'] = "authorization_code";
$res = $this->http_request($url,$data);
echo $res;
}
支付接口：
public function wxPay(){
$openID = I('get.openid','','trim');
$totalFee = I('get.total_fee','','trim');
$title = I('get.title','','trim');
// 具体配置 $appid = "填写小程序的 appid"; //小程序 appid $openid = $openID; // 用户的openid $mch_id = "填写商户号"; //商户号 $key = "填写商户号的秘钥";
$out_trade_no = $this->order_number();//商户订单号 $body = $title;
$total_fee = $totalFee;//总金额 单位 分 $weixinpay = new \Components\WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee);
$result = $weixinpay->pay();
echo json_encode($result);
}
生成随机字符串和订单号：
//随机32位字符串 private function nonce_str(){
$result = '';
$str = 'QWERTYUIOPASDFGHJKLZXVBNMqwertyuioplkjhgfdsamnbvcxz';
for ($i=0;$i<32;$i++){
$result .= $str[rand(0,48)];
}
return $result;
}
//生成订单号 private function order_number($openid){
//date('Ymd',time()).time().rand(10,99);//18位 return md5($openid.time().rand(10,99));//32位
}
支付回调接口：
// 支付回调地址 public function notify(){
$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];
}
小程序JS：
//index.js
//获取应用实例
const app = getApp()
const APP_ID = "小程序的appid";//输入小程序的appid
const APP_SECRET = "小程序的app_secret";//输入小程序app_secret var OPEN_ID = "";//储存获取到openid var SESSION_KEY = "";//储存获取到session_key Page({
data:{
'message':"发起支付"
},
wxPay:function(){
var that = this;
wx.login({
success:function(res){
wx.request({
url:"https://xiaochengxu.e0yu.com/index.php?s=Index/get_openid",
data:{
appid: APP_ID,
secret:APP_SECRET,
js_code:res.code,
grant_type: 'authorization_code'
},
method:'GET',
success:function(res){
//console.log(res);
OPEN_ID = res.data.openid;//获取到的openid wx.request({
url: "https://xiaochengxu.e0yu.com/index.php?s=Index/wxPay",
data:{
openid:OPEN_ID,
total_fee:1,//充值金额 单位"分"
title:'商品标题'
},
method:'GET',
success:function(result){
//console.log(result);
console.log('调起支付');
wx.requestPayment({
'timeStamp': result.data.timeStamp,
'nonceStr': result.data.nonceStr,
'package': result.data.package,
'signType': 'MD5',
'paySign': result.data.paySign,
'success': function (res) {
console.log('success');
},
'fail': function (res) {
console.log('fail');
},
'complete': function (res) {
console.log('complete');
}
});
}
})
},
})
}
});
}
})
效果 ：
下面给出：WeixinPay：
<?php
namespace Components;
/* 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;
}
}
作者：帅到要去报警
链接：微信小程序 --- 完成小程序支付功能
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