3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = "a"; echo $str; $b = $str + 1; echo $b;
Output for 7.1.0 - 7.1.7
a Warning: A non-numeric value encountered in /in/uiBCd on line 4 1
Output for 4.3.0 - 7.0.20
a1