3v4l.org

run code in 300+ PHP versions simultaneously
<?php $firstDay = new DateTime('first day of this month'); $lastDay = new DateTime('last day of this month'); echo $firstDay->getTimestamp(); echo "<br/>"; echo $lastDay->getTimestamp();
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.14, 7.1.16 - 7.1.33, 7.2.0 - 7.2.2, 7.2.4 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1446368640<br/>1448874240
Output for 7.1.15, 7.2.3
1446368641<br/>1448874241
preferences:
222.51 ms | 401 KiB | 330 Q