3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $string = "zz"; $string - 1; echo $string;
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/0OVi7 on line 3 zz
Output for 4.3.0 - 7.0.20
zz