PHP[008]:实现延迟触发器

<?php

$timeManager = [];
$timeMark = 0;

$i = 1000;
while ($i--) {
    $jobTime = (time() + mt_rand(0, 1000));
    echo (1000 - $i) . '个任务 将于' . date('Y-m-d H:i:s', $jobTime) . '执行' . PHP_EOL;
    $timeManager[$jobTime][] = '$i 任务 ' . $i;
}

while (true) {
    ksort($timeManager);
    $timeMark = key($timeManager);
    if (count($timeManager) > 0 && $timeMark < time()) {
        var_dump($timeMark);
        var_dump(date('Y-m-d H:i:s', $timeMark));
        $job = $timeManager[$timeMark];
        unset($timeManager[$timeMark]);
        #$job = array_shift($timeManager);
    } else {
        sleep(1);
    }
}