3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo strtotime('+1 month', 1426579903);
based on UZtoh
Output for 4.3.0 - 4.4.9, 5.0.3 - 7.2.0
1429254703
Output for 5.0.0 - 5.0.2
1429221600