- var_dump: documentation ( source)
<?php
$expected = new DateTimeImmutable('2015-08-31 01:02:04.456790');
var_dump($expected);
$date1 = new DateTimeImmutable('2015-08-31 01:02:03.456788');
$date2 = $date1->modify('1 seconds 2 microseconds');
var_dump($date2);
var_dump($expected == $date2);