3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo Foo;
based on ilcAE
Output for 7.2.0
Warning: Use of undefined constant Foo - assumed 'Foo' (this will throw an Error in a future version of PHP) in /in/83a6N on line 3 Foo
Output for 5.5.0 - 7.1.10
Notice: Use of undefined constant Foo - assumed 'Foo' in /in/83a6N on line 3 Foo