3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php strtotime('-1 month', '2013-10-31');
Output for 5.1.0 - 7.2.0
Notice: A non well formed numeric value encountered in /in/tAomu on line 2
Output for 4.3.0 - 5.0.5