3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a='d'; $b='a'; $c='b'; $d='a'; echo "$a {$$a} $$$a $$$a $$$$a $$$$$a";
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
d a $$d $$d $$$d $$$$d