3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $one = "Hello"; $two = "World"; echo "$one" + "$two";
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/0JKdG on line 4 Warning: A non-numeric value encountered in /in/0JKdG on line 4 0
Output for 4.3.0 - 7.0.20
0