微信H5授权登录PHP版本

直接上代码：

public function weixinLogin(){
        $item = db('setting')->where('id',1)->find();
        $item = json_decode($item['weixin'],true);
        $app_id = $item['app_id'];//应用的APPID
        $rsaPrivateKey = $item['private_key'];//APPSECRET
        //Step2: 使用auth_code换取apauth_token
        if(isset($_REQUEST["state"])){
            $auth_code = $_REQUEST["code"];//存放auth_code
            $token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid={$app_id}&secret={$rsaPrivateKey}&code={$auth_code}&grant_type=authorization_code";
            $token = json_decode(file_get_contents($token_url));
            if(isset($token->errcode)) {
                header('Location: /home/auth/login.html');
                exit();
            }
            $access_token_url = "https://api.weixin.qq.com/sns/oauth2/refresh_token?appid={$app_id}&grant_type=refresh_token&refresh_token=".$token->refresh_token;
            //转成对象
            $access_token = json_decode(file_get_contents($access_token_url));
            if(isset($access_token->errcode)) {
                header('Location: /home/auth/login.html');
                exit();
            }
            $user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token->access_token.'&openid='.$access_token->openid.'&lang=zh_CN';
            //转成对象
            $user_data = json_decode(file_get_contents($user_info_url));
            if (isset($user_info->errcode)) {
                header('Location: /home/auth/login.html');
                exit();
            }
            $user_data = json_decode(json_encode($user_data),true);
            //某个参数可能不存在，需要进行判断，防止报错
            $member = array(
                "nickname"=>isset($user_data['nickname'])?$user_data['nickname']:"",
                "openid"=>isset($user_data['openid'])?$user_data['openid']:"",
                "gender"=>isset($user_data['sex'])&&$user_data["sex"]=="1"?0:1,
                "avatar"=>isset($user_data['headimgurl'])?$user_data['headimgurl']:"",
                "address"=>(isset($user_data['province'])?$user_data["province"]:"").(isset($user_data['city'])?$user_data["city"]:"").(isset($user_data['country'])?$user_data["country"]:"")
            );
            $m = Member::getUserInfoByAliID($member["openid"]);
            if(empty($m)){
                $member['ip']=getIp();
                $member['salt'] = random(8);
                $member['invitation_code'] = random(6);
                $member['create_time'] = TIMESTAMP;
                $member['pet_jihua'] = date('Ymd');
                $uid = Member::addInfo($member);
                $m  = Member::getUserInfoById($uid);
            }
            Cookie::set('member',base64_encode($m));
            header('Location: /home/account.html');
        }else{
            $my_url = $this->get_http_type().$_SERVER['HTTP_HOST']."/home/auth/weixinLogin.html";
            $url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid={$app_id}&redirect_uri={$my_url}&response_type=code&scope=snsapi_userinfo&state=state#wechat_redirect";
            return $url;
        }
    }