screen/commands/UserLevelExpire.php

<?php

use app\common\model\User;
use Workerman\Lib\Timer;
use Workerman\Worker as WO;

class UserLevelExpire extends Com{
    public static function run(){
        $work=self::newWorker();
        $work->onWorkerStart=function (WO $worker){
            Timer::add(3,function ()use ($worker){
                User::where('level','>',0)
                    ->where('level_expire','<',date('Y-m-d H:i:s'))
                    ->update([
                        'level'=>User::LEVEL_COMM
                    ]);
            });
        };
    }
}
UserLevelExpire::run();