Online PHP editor | refs for kanpA

@ 2021-07-22T08:47:50Z

<?php

$a = new DateTime('2020-01-01 23:59:40');
$b = new DateTimeImmutable('2020-01-01 23:59:40');

var_dump($a, $b);

$a->add(new DateInterval('P1D'));
$b->add(new DateInterval('P1D'));

var_dump($a, $b);