3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php /* $a = "Hello"; $b = function() { echo ",world"; }; $arr = [$a,$b]; array_walk($arr, function($v) { if ($v instanceof Closure) { call_user_func($v); } else { echo $v; } }); */ $a = 10; $a = ++$a + ++$a; echo $a;
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
23
Output for hhvm-3.10.0

Process exited with code 153.