3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [1,2,3,4,5,6,7,8,9]; $expect = [1,4,7,2,5,8,3,6,9]; $a = usort($array, function ($a, $b){ $arow = 3 - $a%3; $brow = 3 - $b%3; $acol = intval($a/3); $bcol = intval($b/3); return $acol == $bcol?($arow - $brow):$acol - $bcol; }); print_r($array);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 2 [1] => 1 [2] => 5 [3] => 4 [4] => 3 [5] => 8 [6] => 7 [7] => 6 [8] => 9 )

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
48.79 ms | 401 KiB | 8 Q