3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo strtotime('first day of +1 month 00:00:00');
Output for 5.6.28, 7.0.14 - 7.1.0
1404165600
Output for 5.5.35 - 5.6.7, 5.6.21, 7.0.6
1464732000
Output for 5.5.24 - 5.5.29, 5.5.34, 5.6.8 - 5.6.14, 5.6.20, 7.0.5
1462053600
Output for 5.5.30 - 5.5.33, 5.6.15 - 5.6.19, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.0.4
1459461600
Output for 5.3.0 - 5.4.45
1446332400
Output for 5.1.0 - 5.2.17
Output for 4.3.0 - 5.0.5
-1