3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x=5; $y=10; function add() { global $x,$y; $z=$x+$y; } add(); echo $z;
based on vAM7N
Output for 5.0.4 - 7.1.10
Notice: Undefined variable: z in /in/Vjiuu on line 10
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: z in /in/Vjiuu on line 10