3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $f = function($s) { return $s*2; } ($f)(4);
Output for 5.4.20
Parse error: syntax error, unexpected '(' in /in/2rHHB on line 5
Process exited with code 255.
Output for 5.3.0 - 5.4.19
Parse error: syntax error, unexpected '(' in /in/8nCIP on line 5
Process exited with code 255.