3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "a"; $b = "b"; $c = $a + $b; var_dump($c);
Output for 7.1.0 - 7.3.0rc3
Warning: A non-numeric value encountered in /in/FQ1c4 on line 7 Warning: A non-numeric value encountered in /in/FQ1c4 on line 7 int(0)
Output for 4.3.0 - 7.0.20
int(0)