登录的php代码 接口开发

 public function index()
    {
        //code值
        $code=input('code');
        //用户 昵称
        $nickname=input('nickname');
        //开发者的appid  secret  微信公众平台
        $appid="xxxxxxxx";
        $secret="xxxxxxxxxxxxxxx";
        //发送请求获取用户的oppid与sessionkey
        $url="https://api.weixin.qq.com/sns/jscode2session?appid=$appid&secret=$secret&js_code=$code&grant_type=authorization_code";
        $res=Qiniujson_decode(file_get_contents($url),true);
        $userid=Users::where('openid',$res['openid'])->find();
        if ($userid){
            return json(['code'=>200,'msg'=>'success','data'=>$userid]);
        }
        //组装用户数据入库添加
        $info=[
            'nickname'=>$nickname,
            'openid'=>$res['openid'],
            'sessionkey'=>$res['session_key']
        ];
        //执行添加入库
        $data=Users::create($info);
        $info['id']=$data['id'];
//        print_r($info);
        if ($data){
            return json(['code'=>200,'msg'=>'success','data'=>$info]);
        }else{
            return json(['code'=>500,'msg'=>'error','data'=>""]);
        }

    }