3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 'a'; $$a = 'b'; $$$a = 'c'; echo $a;
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: b in /in/R8VAN on line 5 b
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: b in /in/R8VAN on line 5 b