自动获取用户的openid （openid 唯一）

在做登录前我们首先要知道openid 是唯一的

session_key 是每次从新进入的时候还会刷新的（就是注销或删除等）

// 登录
    let token = wx.getStorageSync('token')
    if(!token){
      wx.login({
        success: res => {
          // 发送 res.code 到后台换取 openId, sessionKey, unionId
          let code = res.code
          wx.request({
            url: 'http://www.test.com/integral/login?code='+code,
            success:res=>{
              wx.setStorageSync('token',res.data.data)
            }
          })
        }
      })
    }

后端

public function login(Request $request){
        $code = $request->get('code');
        $userInfo = sprintf(config('wx_login.login'),$code);
        $data = (new Curl())->geturl($userInfo);
        $getUserInfo = User::where('openid',$data['openid'])->first();
        if(!$getUserInfo){
            User::insert($data);
            $getUserInfo = User::where('openid',$data['openid'])->first();
            $token = (new Token())->createToken($getUserInfo['id']);
            return ['code'=>3000,'msg'=>'注册成功','data'=>$token];
        }
            $token = (new Token())->createToken($getUserInfo['id']);
            return  ['code'=>3000,'msg'=>'登录成功','data'=>$token];
    }

cnfig 

return[
    'login'=>'https://api.weixin.qq.com/sns/jscode2session?appid=微信小程序号&secret=秘钥&js_code=%s&grant_type=authorization_code'
];

 Service (封装一个curl)

function geturl($url){
        $headerArray =array("Content-type:application/json;","Accept:application/json");
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch,CURLOPT_HTTPHEADER,$headerArray);
        $output = curl_exec($ch);
        curl_close($ch);
        $output = json_decode($output,true);
        return $output;
    }

Token 我这里使用的是JWT

链接 PHP token验证_lmy2020start的博客-CSDN博客