3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = 'bar'; $bar = 'baz'; echo "${$$foo}";
based on rXvfu
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: baz in /in/HiTad on line 4
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: baz in /in/HiTad on line 4