前端代码

data() {return {openid: "",server: '',code:''};
},
mounted() {this.getCode()
},
methods:{getCode() {// 非静默授权，第一次有弹框this.code = '';var callback_url = '回调地址'; // 获取页面urlvar appid = 'APPID';this.code = this.getUrlCode().code; // 截取codeif (this.code == null || this.code === '') {// 如果没有code，则去请求window.location.href = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=${appid}&redirect_uri=${encodeURIComponent(callback_url)}&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect`;} else {// 当code不等于空时，调用后端接口获取用户信息this.getUserInfo();// 你自己的业务逻辑}},getUserInfo() {let token = uni.getStorageSync("token");const header = {"Content-Type": "application/json","Authorization": token};let data = {}data.code = this.codedata.appid= '你的appid'data.secret= '你的secret'uni.request({url: 'https://api.ecom20200909.com/Api/getOpenid',data: data,header: header,timeout: 20000,method: 'POST',dataType: 'json',success: (res) => {this.setOpenid(res.data.openid);uni.setStorageSync('openid', res.data.openid)}})},getUrlCode() {// 截取url中的code方法var url = location.search;var theRequest = new Object();if (url.indexOf('?') != -1) {var str = url.substr(1);var strs = str.split('&');for (var i = 0; i < strs.length; i++) {theRequest[strs[i].split('=')[0]] = strs[i].split('=')[1];}}return theRequest;},
}

后端php代码

public function getOpenid(){$code = input('post.code');$param["appid"]=input('post.appid');$param["secret"]=input('post.secret');$param["code"]=$code;$param["grant_type"]="authorization_code";$json = $this->curlPost("https://api.weixin.qq.com/sns/oauth2/access_token",$param);$rv=json_decode($json,true);return json($rv);
}public function curlPost($url = '', $postData = '', $options = array()) {if (is_array($postData)) {$postData = http_build_query($postData);}$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_POST, 1);curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数if (!empty($options)) {curl_setopt_array($ch, $options);}//https请求 不验证证书和hostcurl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);$data = curl_exec($ch);curl_close($ch);return $data;
}