- var_dump: documentation ( source)
- ini_get: documentation ( source)
- date_default_timezone_get: documentation ( source)
<?php
var_dump(ini_get('date.timezone'));
var_dump(date_default_timezone_get());
$date = new DateTime('-0100-03-10 00:00:00');
var_dump($date);
$date = new DateTime('-0100-03-10 00:00:00', new DateTimeZone('Europe/London'));
var_dump($date);