3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ''; $b = null; echo $a +1; echo $b + 2;
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/kKWvq on line 5 12
Output for 5.3.17 - 7.0.20
12