3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 'a'; $c = 'b'; $$a = 'c'; $$$a = 'd'; echo $a . "\n"; echo $b . "\n"; echo $d . "\n";
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
c d Notice: Undefined variable: d in /in/mtqmr on line 10
Output for 4.3.0 - 5.0.3
c d Notice: Undefined variable: d in /in/mtqmr on line 10