project/app/admin/model/DataGroupUserid.php

<?php
declare (strict_types = 1);

namespace app\admin\model;

use think\Model;

/**
 * @mixin \think\Model
 */
class DataGroupUserid extends Model
{
	
	public static  function GroupIdByUid(int $uid):array{
		return self::where(["uid"=>$uid,"is_del"=>0,"status"=>1])->column("data_group_id");
	}
	
	public static  function UidsByGroupId($GroupId):array{
		$list= self::where(['data_group_id'=>$GroupId,'is_del'=>0,'status'=>1])->field('data_group_id,uid')->select();
		$GroupByIds=[];
		if($list->isEmpty()==false){
			foreach ($list as $item){
				$GroupByIds[$item->data_group_id][]=$item->uid;
			}
		}
		return $GroupByIds;
	}
}