Online PHP editor | refs for u33Tf

@ 2015-10-23T23:18:38Z

<?php

$d = '2015-01-01';
$dd = new DateTime($d);
print_r($dd->format(DateTime::W3C));

$dd->add(new DateInterval('PT17H12M'));
print_r($dd->format(DateTime::W3C));

var_dumpt($dd->format('\P\TH\Hi\M') === 'PT1712M');