3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x = function() { return function () { echo strtoupper('hi ho'),"\n"; }; }; // works: $x()->__invoke(); // works in PHP7: $x()();
based on lrRbI
Output for 7.0.0 - 7.2.0
HI HO HI HO
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '(' in /in/0P74i on line 8
Process exited with code 255.