1.小程序>微信小程序登陆

关于后端：fastadmin加密生成token-CSDN博客

思路：

通过easywechat+fastadmin，

（1）== 用户端登陆（获取code） -> 请求后端接口获取session_key -> 用户端保存session_key

use EasyWeChat\Foundation\Application;
use EasyWeChat\Factory;public function getSessionKey(){$code = $this->request->post('code');$config = ['app_id' => 'wx65ae3f41d0714e10','secret' => 'e79ea0badcc0a4f1c549c55a530660cf','token' => 'easywechat','aes_key' => '......','http' => ['throw'  => true, // 状态码非 200、300 时是否抛出异常，默认为开启'timeout' => 5.0,'retry' => true, // 使用默认重试配置],];$app = Factory::miniProgram($config); // 这个是小程序的
//        $app = Factory::officialAccount($config); // 这个是公众号的// 使用 SDK 中的相关功能来获取 session_key$data = $app->auth->session($code);$this->success('获取session_key成功', $data);}

此刻就获取到了：session_key（很重要）、openid。 

注意这里的this指向。

// 前端uniapp
getSessionKey() {var that = thisuni.login({success(info) {console.log('login信息', info)var postData = {code: info.code}getApp().posturl('Wechat/getSessionKey', postData).then(res => {console.log(res)that.session_key = res.data.session_keyconsole.log('========',that.session_key)});}})}

2.小程序>微信小程序授权用户信息

用户端获取用户信息（获取 iv + encryptedData + signature + session_key ）-> 请求后端接口获取token -> 用户端保存token （可以控制时间）

public function getUserInfo(){// 获取得到avatarUrl、nickName、openId，进行存储$data = $this -> app -> encryptor->decryptData($this -> post['session_key'], $this -> post['iv'], $this -> post['encryptedData']);$userModel = new HcdrspUser();$result = $userModel->where('openid', $data['openId'])->find();if($result){$this->success('获取用户信息成功', $data);}else{$userModel->openid = $data['openId'];$userModel->avatarUrl = $data['avatarUrl'];$userModel->name = $data['nickName'];// 创建时间$userModel->createtime = time();$userModel->save();$this->success('欢迎新用户', $data);}}

getuserinfo(e){console.log('getuserinfo用户信息',e);console.log('session_key信息',this.session_key);var postData = {iv: e.detail.iv,encryptedData:e.detail.encryptedData,session_key: this.session_key}getApp().posturl('Wechat/getUserInfo', postData).then(res => {console.log(res)this.avatarUrl = res.data.avatarUrlthis.nickName = res.data.avatarUrllet openId = res.data.openIduni.setStorageSync('openId',openId)});},

3. 小程序>微信小程序获取手机号

前端：

<button open-type="getPhoneNumber" @getphonenumber="onGetPhoneNumber">授权并获取手机号</button>

onGetPhoneNumber(e){if(this.nickName === ''){uni.showToast({icon:'none',title:'请先登陆'})return}console.log('getPhoneNumber用户信息',e);console.log('session_key信息',this.session_key);var postData = {iv: e.detail.iv,encryptedData:e.detail.encryptedData,session_key: this.session_key}getApp().posturl('Wechat/getPhoneNumber', postData).then(res => {console.log(res)this.phoneNumber = res.data.phoneNumber});},

后端：

/** 获取手机号*/public function getPhoneNumber(){$data = $this -> app -> encryptor->decryptData($this -> post['session_key'], $this -> post['iv'], $this -> post['encryptedData']);$userModel = new HcdrspUser();$result = $userModel->where('phone', $data['phoneNumber'])->find();if($result){$this->success('已存在手机号', $data);}else{$userModel->phone = $data['phoneNumber'];$userModel->save();$this->success('获取手机号成功', $data);}}