本文仅记录了微信小程序支付开发的基本流程和代码，具体业务需自行修改。tp5框架下演示：
参考：
微信小程序支付：业务流程
SDK与DEMO: 下载页
PHPPayDemo: demo
小程序端：
goPay(e){
var that = this;
//发起预支付，获取所需参数
wx.request({
url: app.globalData.host + ‘/api/wx_pay/createOrder‘, //请求地址
data: {
openid: wx.getStorageSync(‘openid‘),
total_fee: that.data.totalPrice,
goods: JSON.stringify(that.data.goods)
},
method: ‘POST‘,
success(res){ console.log(res) if(res.data.code == 1){
//发起微信支付
wx.requestPayment({
timeStamp: res.data.data.timeStamp,
nonceStr: res.data.data.nonceStr,
package: res.data.data.package,
signType: res.data.data.signType,
paySign: res.data.data.paySign,
success(r) { console.log(r)
//do something
//比如回调，修改状态等操作
},
fail() {
wx.showToast({
title: ‘支付失败‘,
icon: ‘none‘
})
}
})
}else{
wx.showToast({
title: res.data.data,
icon: ‘none‘
})
}
}
})
},
PHP端：
WxPay.php
<?php
namespace app\api\controller;
use app\api\controller\Common;
use think\Db;
/**
* 微信支付
*/
class WxPay extends Common
{
//生成订单
public function createOrder(){
if (request()->isPost()) { $openid = input(‘openid‘);
$total_fee = input(‘total_fee‘);$orderid = get_order_sn(); //生成订单号
if (!$openid) {
return json(array(‘code‘=>3, ‘data‘=>‘no openid‘));
}
$goods = json_decode(input(‘goods‘), TRUE);
// 添加订单,自行添加
$insert_order_id = Db::name(‘order‘)
->insertGetId(array(
‘pay_price‘ => $total_fee,
‘orderid‘ => $orderid
));
if($insert_order_id){ /* 调用微信【统一下单】 */ $res = $this->pay($total_fee, $openid, $orderid);
return json(array(‘code‘=>1, ‘data‘=>$res, ‘oid‘=>$insert_order_id)); } } }/* 首先在服务器端调用微信【统一下单】接口，返回prepay_id和sign签名等信息给前端，前端调用微信支付接口 */ private function Pay($total_fee, $openid, $order_id, $body=‘‘){ $appid = config(‘myapp.appid‘);//小程序的appid $body = config(‘site.title‘).‘-‘.$body; $mch_id = config(‘myapp.pay_mchid‘); $KEY = config(‘myapp.pay_apikey‘); $nonce_str = (string)mt_rand(10000, 99999).time();//随机字符串 $notify_url = request()->domain().‘api/wx_pay/notify‘; //支付完成回调地址url,不能带参数 $out_trade_no = $order_id; //商户订单号 $spbill_create_ip = $_SERVER[‘SERVER_ADDR‘]; $trade_type = ‘JSAPI‘;//交易类型 默认JSAPI //这里是按照顺序的 因为下面的签名是按照(字典序)顺序 排序错误 肯定出错 $post[‘appid‘] = $appid; $post[‘body‘] = $body; $post[‘mch_id‘] = $mch_id; $post[‘nonce_str‘] = $nonce_str;//随机字符串 $post[‘notify_url‘] = $notify_url; $post[‘openid‘] = $openid; $post[‘out_trade_no‘] = $out_trade_no; $post[‘spbill_create_ip‘] = $spbill_create_ip;//服务器终端的ip $post[‘total_fee‘] = intval($total_fee); //总金额 最低为一分钱 必须是整数 $post[‘trade_type‘] = $trade_type; $sign = $this->MakeSign($post, $KEY); //签名 $post_xml = ‘<xml> <appid>‘.$appid.‘</appid> <body>‘.$body.‘</body> <mch_id>‘.$mch_id.‘</mch_id> <nonce_str>‘.$nonce_str.‘</nonce_str> <notify_url>‘.$notify_url.‘</notify_url> <openid>‘.$openid.‘</openid> <out_trade_no>‘.$out_trade_no.‘</out_trade_no> <spbill_create_ip>‘.$spbill_create_ip.‘</spbill_create_ip> <total_fee>‘.$total_fee.‘</total_fee> <trade_type>‘.$trade_type.‘</trade_type> <sign>‘.$sign.‘</sign></xml> ‘;
//统一下单接口prepay_id $url = ‘https://api.mch.weixin.qq.com/pay/unifiedorder‘; $xml = $this->http_request($url,$post_xml); //POST方式请求http
$array = $this->xml2array($xml); //将【统一下单】api返回xml数据转换成数组，全要大写
if($array[‘RETURN_CODE‘] == ‘SUCCESS‘ && $array[‘RESULT_CODE‘] == ‘SUCCESS‘){ $time = time(); $tmp=‘‘; //临时数组用于签名 $tmp[‘appId‘] = $appid; $tmp[‘nonceStr‘] = $nonce_str; $tmp[‘package‘] = ‘prepay_id=‘.$array[‘PREPAY_ID‘]; $tmp[‘signType‘] = ‘MD5‘; $tmp[‘timeStamp‘] = "$time"; $data[‘code‘] = 1; $data[‘timeStamp‘] = "$time"; //时间戳 $data[‘nonceStr‘] = $nonce_str; //随机字符串 $data[‘signType‘] = ‘MD5‘; //签名算法，暂支持 MD5 $data[‘package‘] = ‘prepay_id=‘.$array[‘PREPAY_ID‘]; //统一下单接口返回的 prepay_id 参数值，提交格式如：prepay_id=* $data[‘paySign‘] = $this->MakeSign($tmp,$KEY); //签名,具体签名方案参见微信公众号支付帮助文档; $data[‘out_trade_no‘] = $out_trade_no; }else{ $data[‘code‘] = 0; $data[‘msg‘] = "错误"; $data[‘RETURN_CODE‘] = $array[‘RETURN_CODE‘]; $data[‘RETURN_MSG‘] = $array[‘RETURN_MSG‘]; $data[‘ERR_CODE_DES‘] = $array[‘ERR_CODE_DES‘]; } return $data; }
/** * 生成签名, $KEY就是支付key * @return 签名 */ public function MakeSign($params,$KEY){ //签名步骤一：按字典序排序数组参数 ksort($params); $string = $this->ToUrlParams($params); //参数进行拼接key=value&k=v //签名步骤二：在string后加入KEY $string = $string . "&key=".$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; }
/** * 将参数拼接为url: key=value&key=value * @param $params * @return string */ public function ToUrlParams( $params ){ $string = ‘‘; if( !empty($params) ){ $array = array(); foreach( $params as $key => $value ){ $array[] = $key.‘=‘.$value; } $string = implode("&",$array); } return $string; }
/** * 调用接口， $data是数组参数 * @return 签名 */ public function http_request($url, $data = null, $headers=array()) { $curl = curl_init(); if( count($headers) >= 1 ){ curl_setopt($curl, CURLOPT_HTTPHEADER, $headers); } curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE); if (!empty($data)){ curl_setopt($curl, CURLOPT_POST, 1); curl_setopt($curl, CURLOPT_POSTFIELDS, $data); } curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); $output = curl_exec($curl); curl_close($curl); return $output; }
//获取xml里面数据，转换成array private function xml2array($xml){ $p = xml_parser_create(); xml_parse_into_struct($p, $xml, $vals, $index); xml_parser_free($p); $data = ""; foreach ($index as $key=>$value) { if($key == ‘xml‘ || $key == ‘XML‘) continue; $tag = $vals[$value[0]][‘tag‘]; $value = $vals[$value[0]][‘value‘]; $data[$tag] = $value; } return $data;}
//支付完后的回调 public function notify(){ //do something //更新支付状态 //更新购物商品状态 return json(array(‘code‘=> 1, ‘data‘=>‘支付成功‘));}
没整理好，以后有时间再说吧，，，
以上所有方法都可从SDK及DEMO中寻得，官方参考。
原文地址：https://www.cnblogs.com/sanplit/p/11044265.html
时间： 2024-11-05 17:24:34