3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foobar() { echo "yes"; } use foobar as foo; foo();
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Call to undefined function foo() in /in/7nIS9:9 Stack trace: #0 {main} thrown in /in/7nIS9 on line 9
Process exited with code 255.
Output for 5.3.22 - 5.6.28
Fatal error: Call to undefined function foo() in /in/7nIS9 on line 9
Process exited with code 255.