3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo $a;
Output for 5.3.0 - 5.6.30, hhvm-3.10.1 - 3.21.3, 7.0.0 - 7.2.1
Notice: Undefined variable: a in /in/4aIGH on line 2
Output for hhvm-3.22.0
Notice: Undefined variable: a in /in/4aIGH on line -1