3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ 'a' => 0, 'b' => 0, 'c' => 1 ]; var_export( array_reduce( array_keys($a), function ($result, $k) use ($a) { $result[$a[$k]][] = $k; return $result; } ) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 0 => 'a', 1 => 'b', ), 1 => array ( 0 => 'c', ), )

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:
44.21 ms | 990 KiB | 4 Q