3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $block = 1 + $a; echo "$block";
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: a in /in/2TV48 on line 2 1
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: a in /in/2TV48 on line 2 1