3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php print '02/12/2013' - '18/11/2013';
Output for 7.1.0
Notice: A non well formed numeric value encountered in /in/HYB5L on line 3 Notice: A non well formed numeric value encountered in /in/HYB5L on line 3 -16
Output for 5.3.0 - 7.0.14
-16