- var_dump: documentation ( source)
- date_default_timezone_set: documentation ( source)
<?php
date_default_timezone_set('Europe/Minsk');
$a = new DateTimeImmutable("2015-01-01 11:00:00");
$daySchedule = [
'from' => '10:00+03:00',
'till' => '21:00+03:00',
];
$b = $a->setTime(10, 0)->setTimezone("+03:00");
var_dump($a > $b, $a, $b);
var_dump($a->getTimestamp());
var_dump($b->getTimestamp());
var_dump($a > $b, $a, $b);