3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?hh ( function($x) { return $x + 1; });
based on FRdTO
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Call to undefined function hh() in /in/JU7b5:1 Stack trace: #0 {main} thrown in /in/JU7b5 on line 1
Process exited with code 255.
Output for hhvm-3.12.0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.34 - 5.6.28
Fatal error: Call to undefined function hh() in /in/JU7b5 on line 3
Process exited with code 255.
Output for 4.3.0 - 5.4.32
<?hh ( function($x) { return $x + 1; });