- var_dump: documentation ( source)
<?php
$utc = new DateTime('now', new \DateTimeZone('UTC'));
var_dump($utc);
$utc->setTimeZone(new \DateTimeZone('CEST'));
var_dump($utc);
$utc->setTimeZone(new \DateTimeZone('Europe/Amsterdam'));
var_dump($utc);
$utc->setTimeZone(new \DateTimeZone('+4:00'));
var_dump($utc);