3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = "a"; echo $str; $b = "a" + 1; echo $b;
Output for 7.1.0 - 7.3.0rc4
a Warning: A non-numeric value encountered in /in/7Z2tJ on line 4 1
Output for 4.3.0 - 7.0.20
a1