3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo (new DateTime('2016-03-27 01:00:00'))->add(new DateInterval('PT3H'))->format(DateTime::RFC3339);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
2016-03-27T05:00:00+02:00
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30
2016-03-27T04:00:00+02:00
Output for 7.3.32 - 7.3.33, 8.0.13
2016-03-27T04:00:00+00:00
preferences:
193.23 ms | 402 KiB | 294 Q