- var_dump: documentation ( source)
<?php
$t = "2014-04-05T19:00:00";
$a = \DateTime::createFromFormat('Y-m-d\TH:i:s', $t, new \DateTimeZone("America/New_York"));
$a->setTimezone(new \DateTimeZone("America/New_York"));
var_dump($a);
var_dump($a->format('w'));
$open_hour = 1100;
$b = \DateTime::createFromFormat('Y-m-d Hi', $a->format('Y-m-d') . ' ' . $open_hour);
var_dump($b);