3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = "a"; echo $str; $b = $str + strval(1); echo $b;
Output for 7.1.0 - 7.3.0rc4
a Warning: A non-numeric value encountered in /in/umBbn on line 4 1
Output for 4.3.0 - 7.0.20
a1