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小编给大家分享一下微信小程序如何使用PHP实现支付功能，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
本文实例为大家分享了微信小程序支付PHP具体代码，供大家参考，具体内容如下
服务器端获取 openid
Getopenid.php
<?php
header('Content-type: application/json; charset=UTF-8');
$APPID="";//填写小程序appid
$SECRET="";//填写小程序secret
$JSCODE="";
if(isset($_GET['js_code'])){
$JSCODE=$_GET['js_code'];
$url="https://api.weixin.qq.com/sns/jscode2session?appid=".$APPID
."&secret=".$SECRET."&js_code=".$JSCODE."&grant_type=authorization_code";
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_HEADER, 0);
$data = curl_exec($curl);
$array=json_decode($data,true);
curl_close($curl);
$openid=isset($array['openid'])?$array['openid']:$array['errcode'];
if($openid=="40029"){
$response["result"] = 0;
$response["msg"] = "invalid code";
$response["openid"] = $openid;
echo json_encode($response);
}else{
$response["result"] = 1;
$response["msg"] = "user exist";
$response["openid"] = $openid;
echo json_encode($response);
}
}小程序存储openid
在app.js中
getUserInfo:function(cb){
var that = this
if(this.globalData.userInfo){
typeof cb == "function" && cb(this.globalData.userInfo)
}else{
wx.login({
success: function (res) {
if (res.code) {
var code = res.code;
wx.getUserInfo({
success: function (res2) {
console.log(res2);
that.globalData.userInfo = res2.userInfo;
typeof cb == "function" && cb(that.globalData.userInfo)
var encryptedData = encodeURIComponent(res2.encryptedData);//一定要把加密串转成URI编码
var iv = res2.iv;
//请求自己的服务器
//Login(code, encryptedData, iv);
wx.showToast({
title: '正在登录...',
icon: 'loading',
duration: 10000
});
//请求服务器
wx.request({
url: API_URL,//Getopenid.php
data: {
js_code: code,
},
method: 'GET',
header: {
'content-type': 'application/json'
}, // 设置请求的 header
success: function (res) {
// success
wx.hideToast();
console.log("JSON:" + res.data);
if (res.data.result=="1"){//获取openid成功
wx.setStorage({//存储openid
key: "openid",
data: res.data.openid
})
}else{
wx.showToast({
title: 'openid获取失败',
icon: 'none',
duration: 2000
})
}
console.log('服务器返回' + res.data.result);
console.log('服务器返回' + res.data.msg);
console.log('服务器返回' + res.data.openid);
},
fail: function () {
// fail
// wx.hideToast();
},
complete: function () {
// complete
}
})
}
})
} else {
console.log('获取用户登录态失败！' + res.errMsg)
}
}
})
}
}在登陆界面获取openid
var app = getApp()
onLoad: function () {
console.log('onLoad')
var that = this
//调用应用实例的方法获取全局数据
app.getUserInfo(function(userInfo){//获取用户信息
//更新数据
that.setData({
userInfo:userInfo
})
})
}通过以上步骤已经获取到openid
支付方法小程序
pay() {
var that = this;
if (this.data.totalPrice == 0) {
return;
}
wx.getStorage({//获取存储在本地的openid
key: 'openid',
success: function (res) {
console.log(res.data)
that.setData({
openid:res.data,
})
var carArray = that.data.carArray;
var str="";
for (var i = 0; i < carArray.length; i++) {
str=str+ carArray[i].num+"个" + carArray[i].name+" ";
}
wx.request({
url: 'Pay.php',//支付接口
data: {
openid: res.data,//openid
total_fee: that.data.totalPrice,//总金额
body: str,//商品描述
},
method:'GET',
success:function(res){
console.log(res.data['timeStamp'])
if(res.data){
wx.requestPayment({
'timeStamp': res.data['timeStamp'],
'nonceStr': res.data['nonceStr'],
'package': res.data['package'],
'signType': 'MD5',
'paySign': res.data['paySign'],
'success': function (res) {
wx.showToast({
title: '支付成功',
icon: 'succes',
duration: 1000,
mask: true
})
//支付成功后在数据库减去购买商品的数量
var carArray = that.data.carArray;
for (var i = 0; i < carArray.length; i++) {
that.setData({
jiesuan_num: carArray[i].num,
jiesuan_id: carArray[i].goods_id,
})
DeGood(that);
}
},
'fail': function (res) {
wx.showToast({
title: '支付失败',
icon: 'none',
duration: 1000,
mask: true
})
}
})
}
}
})
}
})
},Pay.php
<?php
include 'WeixinPay.php';
$appid=''; //小程序appid
$openid= $_GET['openid'];
$mch_id=''; //商户id
$key=''; //商户key
$out_trade_no = $mch_id. time();
$total_fee = $_GET['total_fee'];
$body= $_GET['body'];
if(empty($total_fee)){
$body = $body;
$total_fee = floatval(99*100);
}else{
$body = $body;
$total_fee = floatval($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;
}
}看完了这篇文章，相信你对“微信小程序如何使用PHP实现支付功能”有了一定的了解，如果想了解更多相关知识，欢迎关注亿速云行业资讯频道，感谢各位的阅读！
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