请问下代码更新后不自动加载怎么回事？？

<?php
use Workerman\Worker;
use Workerman\Lib\Timer;

$time = time();
$path = APPPATH.'Taskmgr/';

/**
 * 检测函数
 * @param $monitor_dir
 * @param $timerID
 */
function check_files($monitor_dir='',$timerID='')
{
    global $time;

    $dir_iterator = new RecursiveDirectoryIterator($monitor_dir);
    $iterator = new RecursiveIteratorIterator($dir_iterator);
    foreach ($iterator as $file)
    {
        if(pathinfo($file, PATHINFO_EXTENSION) != 'php')
        {
            continue;
        }
        if($time < $file->getMTime())
        {
            posix_kill(posix_getppid(), SIGUSR1);//重载
            $time = $file->getMTime();
            break;
        }
    }
    test();
}

$worker = new Worker();
$worker->name = 'FileMonitor';
$worker->reloadable = true;
$worker->onWorkerStart = function()
{
    global $path;
    $time_id = Timer::add(1, 'check_files', array($path,&$time_id));
};

$worker->onWorkerReload = function()
{
    test();
};

function test()
{
    Worker::$logFile = APPPATH.'log.txt';
    $arr = include_once APPPATH.'Taskmgr/List.php';
//    Worker::log(var_export($arr,true));
    echo "11111331\n";
}

说明下：我这个文件就是在Taskmgr目录下，更改代码后能反映出来文件被更新了，但是就是输出的还是更改之前的东西。
只有在on{...}回调中载入的文件平滑重启后才会自动更新，但是我怎么搞都不会自动更新，愣是没搞明白，请指点下！