PHP - Manual: HRTime\Unit
2024-12-30
(PECL hrtime >= 0.4.3)
HRTime\Unit::SECOND
HRTime\Unit::MILLISECOND
HRTime\Unit::MICROSECOND
HRTime\Unit::NANOSECOND
官方地址:https://www.php.net/manual/en/class.hrtime-unit.php