間隔定時器， tick 定時器會持續觸發，直到呼叫 clear() 清除為止，
$timer = Swoole\Timer::tick(3000, function (int $timer_id, $param1, $param2) {
echo "timer_id #$timer_id, after 3000ms.\n";
echo "param1 is $param1, param2 is $param2.\n";
Swoole\Timer::tick(14000, function ($timer_id) {
echo "timer_id #$timer_id, after 14000ms.\n";
});
}, "A", "B");
一次性定時器，執行完成后會自動銷毀，
$str = "Swoole";
$timer = Swoole\Timer::after(1000, function() use ($str) {
echo "Hello, $str\n";
});
使用定時器 ID 來洗掉定時器，
var_dump(Swoole\Timer::clear($timer));
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標籤：PHP