DateTimeImmutable

DateTimeImmutable.php

<?php
	date_default_timezone_set('Asia/Tokyo');
	$date = new DateTimeImmutable();
	var_dump($date->format('Y-m-d H:i:s.u'));
	var_dump($date->format('Y-m-d H:i:s.v'));
	
	$date = new DateTimeImmutable('2020-04-20 11:12:13');
	var_dump($date->format('U'));
	var_dump(mktime($hour=11, $minute=12, $second=13, $month=4, $day=20, $year=2020));
?>

$ php DateTimeImmutable.php
string(26) "2020-05-07 15:24:56.253824"
string(23) "2020-05-07 15:24:56.253"
string(10) "1587348733"
int(1587348733)