3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = '$a'; echo $a; echo $$a; echo $$$a;
Output for 5.0.4 - 7.1.0
$a Notice: Undefined variable: $a in /in/WhOjI on line 5 Notice: Undefined variable: $a in /in/WhOjI on line 6 Notice: Undefined variable: in /in/WhOjI on line 6
Output for 4.3.0 - 5.0.3
$a Notice: Undefined variable: $a in /in/WhOjI on line 5 Notice: Undefined variable: $a in /in/WhOjI on line 6 Notice: Undefined variable: in /in/WhOjI on line 6