取三级分销上下级用户id

//取上三级的用户idpublic  function _get_up_third_id($member_id){    $up_id=array();    $invite_id=dbselect(‘invite_id‘)->from(‘{dt_user}‘)->where([‘id‘=>$member_id])->get(0,‘invite_id‘);    if($invite_id>0){        //取上一级id        $up_first=dbselect(‘id,invite_id‘)->from(‘{dt_user}‘)->where([‘id‘=>$invite_id])->get(0);        if($up_first)        {            $up_id[‘up_first‘]=$up_first[‘id‘];            if($up_first[‘invite_id‘]>0)            {                //取上二级id                $up_two=dbselect(‘id,invite_id‘)->from(‘{dt_user}‘)->where([‘id‘=>$up_first[‘invite_id‘]])->get(0);

                if($up_two)                {                    $up_id[‘up_two‘]=$up_two[‘id‘];                    if($up_two[‘invite_id‘]>0)                    {

                            $up_id[‘up_third‘]=$up_two[‘invite_id‘];

                    }

                }            }

        }    }

    return $up_id;

}

//取下三路idpublic  function  _get_down_third_id($member_id){    $down_third_info=array();    //一级id    $down_first=$this->_get_son_id([$member_id]);    if($down_first)    {        $ids_first=[];        $ids_two=[];        //循环取出一级id中对应下级        $down_third_info[‘down_first‘]=$down_first;        //将数组中的id取出，然后根据拼装的数组取下一级的id        foreach ($down_first as $key)        {            array_push($ids_first,$key[‘id‘]);        }        //二级id        $down_two=$this->_get_son_id($ids_first);        if($down_two){            $down_third_info[‘down_two‘]=$down_two;            foreach($down_two as $row){                array_push($ids_two,$row[‘id‘]);            }            //三级id            $down_third=$this->_get_son_id($ids_two);            if($down_third){                $down_third_info[‘down_third‘]=$down_third;            }        }

    }

    return $down_third_info;}//根据父级id取子级idprivate  function  _get_son_id($ids=[]){    $list=dbselect(‘id,invite_id‘)->from(‘{dt_user}‘)->where([‘invite_id IN‘=>$ids])->toArray();    if($list)    {        return $list;    }    else    {        return array();    }

}