- var_dump: documentation ( source)
<?php
$utc = new \DateTimeZone('UTC');
$la = new \DateTimeZone('America/Los_Angeles');
$a = \DateTime::createFromFormat('U', 1388534400, $utc);
$b = \DateTime::createFromFormat('U', 1388534400, $la);
var_dump($a);
var_dump($b);