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这个代码全是干货呀,拿过来可以直接使用。小程序在调起微信支付之前需要5个参数,这时候就需要携带code向后台请求,然后后台根据code获取openid 再进行服务器之间的。。。。
一、准备工作
1、小程序注册,要以公司的以身份去注册一个小程序,才有微信支付权限;
2、绑定商户号。
3、在小程序填写合法域
二、完成以上条件,你可以得到
小程序appid 小程序秘钥 这两个用于获取用户openid;
商户号id ,商户号秘钥 支付接口必须的;
三、开始开发
前台代码
- /*
- 调起微信支付
- @param 支付价格,不填写默认为1分钱
- */
- function pay(total_fee) {
-
- var total_fee = total_fee;
- wx.login({
- success: res => {
-
- //code 用于获取openID的条件之一
- var code = res.code;
- wx.request({
- url: '后台地址/index.php',
- method: "POST",
- data: {
- total_fee:total_fee,
- code: code,
- },
- header: {
- 'content-type': 'application/x-www-form-urlencoded' // 默认值
- },
- success: function (res) { //后端返回的数据
- var data = res.data;
- console.log(data);
- console.log(data["timeStamp"]);
- wx.requestPayment({
- timeStamp: data['timeStamp'],
- nonceStr: data['nonceStr'],
- package: data['package'],
- signType: data['signType'],
- paySign: data['paySign'],
- success: function (res) {
- wx.showModal({
- title: '支付成功',
- content: '',
- })
- },
- fail: function (res) {
- console.log(res);
- }
- })
- }
- });
-
-
- }
- })
-
- }
以下是PHP后台代码 ,这里用的是tp框架
- <?php
- namespace Home\Controller;
- use Think\Controller;
- class PayController extends Controller {
-
- //微信支付
- public function pay(){
- //获取openid
- if(I("post.code"))
- { //用code获取openid
- $code=I("post.code");
- $WX_APPID = '';//appid
- $WX_SECRET = '';//AppSecret
- $url = "https://api.weixin.qq.com/sns/jscode2session?appid=" . $WX_APPID . "&secret=" . $WX_SECRET . "&js_code=" . $code . "&grant_type=authorization_code";
- $infos = json_decode(file_get_contents($url));
- $openid = $infos->openid;
- }
- //$fee = I("post.total_fee");
- $fee = 0.01;//举例支付0.01
- $appid = '';//appid.如果是公众号 就是公众号的appid
- $body = '标题';
- $mch_id = ''; //商户号
- $nonce_str = $this->nonce_str();//随机字符串
- $notify_url = ''; //回调的url【自己填写】
- $openid = $openid;
- $out_trade_no = $this->order_number();//商户订单号
- $spbill_create_ip = '';//服务器的ip【自己填写】;
- $total_fee = $fee*100;// 微信支付单位是分,所以这里需要*100
- $trade_type = 'JSAPI';//交易类型 默认
-
-
- //这里是按照顺序的 因为下面的签名是按照顺序 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;//终端的ip
- $post['total_fee'] = $total_fee;//总金额
- $post['trade_type'] = $trade_type;
- $sign = $this->sign($post);//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> ';
-
-
- //print_r($post_xml);die;
- //统一接口prepay_id
- $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
- $xml = $this->http_request($url,$post_xml);
-
-
-
-
- $array = $this->xml($xml);//全要大写
-
-
- //print_r($array);
- if($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['state'] = 200;
- $data['timeStamp'] = "$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'] = $this->sign($tmp);//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['state'] = 0;
- $data['text'] = "错误";
- $data['RETURN_CODE'] = $array['RETURN_CODE'];
- $data['RETURN_MSG'] = $array['RETURN_MSG'];
- }
-
-
- echo json_encode($data);
- }
-
-
-
-
- //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
- }
-
-
-
- //签名 $data要先排好顺序
- private function sign($data){
- $stringA = '';
- foreach ($data as $key=>$value){
- if(!$value) continue;
- if($stringA) $stringA .= '&'.$key."=".$value;
- else $stringA = $key."=".$value;
- }
- $wx_key = '';//申请支付后有给予一个商户账号和密码,登陆后自己设置的key
- $stringSignTemp = $stringA.'&key='.$wx_key;
- return strtoupper(md5($stringSignTemp));
- }
-
-
- //curl请求
- public function http_request($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 $output;
- }
-
-
- //获取xml
- private function xml($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;
- }
-
-
-
- }
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