3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = "Variable!\n"; $bar = "foo"; $wom = "bar"; $bat = "wom"; print $foo; print $$bar; print $$$wom; print $$$$$bat; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Variable! Variable! Variable! Warning: Undefined variable $Variable! in /in/LVOAL on line 10
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Variable! Variable! Variable! Notice: Undefined variable: Variable! in /in/LVOAL on line 10
Output for 7.3.32 - 7.3.33
Variable! Variable! Variable!
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Variable! Variable! Variable! Notice: Undefined variable: Variable! in /in/LVOAL on line 10
preferences:
63.64 ms | 2659 KiB | 4 Q