odd_job/app/admin/controller/Test.php

<?php
namespace app\admin\controller;

use app\admin\BaseController;
use app\common\model\UserPart;

class Test extends BaseController
{
    public function t1(){
          $userIds = UserPart::where('puserid','in',[10000])->column('userid');
          halt($userIds);
    }

    /**
     * 获取下级id
     */
    private function _getNextId($user_id)
    {
        $userIds = UserPart::where('puserid','in',$user_id)->column('userid');
        if (!empty($userIds)) {
            return array_merge($this->_getNextId($userIds),$userIds);
        } else {
            return $userIds;
        }
    }

}