3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo() { echo "foo"; } foo;
Output for 7.2.0 - 7.3.0
Warning: Use of undefined constant foo - assumed 'foo' (this will throw an Error in a future version of PHP) in /in/bPARJ on line 2
Output for 4.3.0 - 5.6.38, hhvm-3.10.1 - 3.21.3, 7.0.0 - 7.1.25
Notice: Use of undefined constant foo - assumed 'foo' in /in/bPARJ on line 2
Output for hhvm-3.22.0
Notice: Use of undefined constant foo - assumed 'foo' in /in/bPARJ on line -1