- print_r: documentation ( source)
- date_default_timezone_set: documentation ( source)
<?php
date_default_timezone_set('Europe/London');
$date3 = DateTime::createFromFormat('Y-m-d H:i:s', '2019-04-01 00:00:00'); // 2019-04-01 00:00:00.0 Europe/London (+01:00)
$date4 = clone $date3;
$date4->modify('+5 week'); // 2019-05-06 00:00:00.0 Europe/London (+01:00)
$differenceDateInterval2 = $date4->diff($date3); // interval: + 1m 4d; days 35
print_r($differenceDateInterval2);