3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "a"; echo $a + -1;
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/IWFiZ on line 3 -1
Output for 4.3.0 - 7.0.20
-1