3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "a string"; echo 4 + $a;
based on jc8Tn
Output for 7.1.0 - 7.3.0rc3
Warning: A non-numeric value encountered in /in/QHESS on line 4 4
Output for 5.5.0 - 7.0.20
4