WeChat上で公開された記事の情報収集を実現

public function getAccessToken(){
    $info = Db::name('access_token')->order('inputtime desc')->find();
    if($info){
        $time = time();
        $long_time = $time - $info['updatetime'];
        if($long_time>=$info['expires_in']){
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->secret;
            $res = $this->getJson($url);
            if(in_array('access_token',$this->DbSy->GetArrElement($res))){
                $insert['access_token'] = $res['access_token'];
                $insert['expires_in'] = $res['expires_in'];
                $insert['updatetime'] = time();
                $up_info = Db::name('access_token')->where('id',$info['id'])->update($insert);
                if(!$up_info){
                    return json(['code'=>103,'msg'=>'AccessToken更新失败']);
                }
                $AccessToken = $res['access_token'];
            }else{
                return json(['code'=>100,'msg'=>'AccessToken获取失败']);
            }
        }else{
            $AccessToken = $info['access_token'];
        }
    }else{
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->secret;
        $res = $this->getJson($url);
        if(in_array('access_token',$this->DbSy->GetArrElement($res))){
            $insert['access_token'] = $res['access_token'];
            $insert['expires_in'] = $res['expires_in'];
            $insert['updatetime'] = time();
            $insert['inputtime'] = time();
            $up_info = Db::name('access_token')->where('id',$info['id'])->insertGetId($insert);
            if($up_info){
                $AccessToken = $res['access_token'];
            }else{
                return json(['code'=>101,'msg'=>'AccessToken插入失败']);
            }

        }else{
            return json(['code'=>100,'msg'=>'AccessToken获取失败']);
        }
    }
    return $AccessToken;
}

public function getArticleList($offset,$type='news',$length=20){
    $data = array(
        'type'=>$type,
        'offset'=>$offset,
        'count'=>$length
    );
    $json_data = json_encode($data);
    $AccessToken = $this->getAccessToken();
    $url = "https://api.weixin.qq.com/cgi-bin/material/batchget_material?access_token=".$AccessToken;
    $res = $this->getJsonData($url,$json_data);
    return $res;
    //dump($res);
}