3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = 'a'; $str += 'b';
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/gorZ7 on line 4 Warning: A non-numeric value encountered in /in/gorZ7 on line 4
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.0.20