3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = ["2019 Honda Civic" => "Sedan", "Maruti Suzuki Baleno" => "Hatchback", "Rolls-Royce Phantom" => "Sedan"]; $result = []; foreach ($array as $k=>$v) { if (!isset($result[$v])) $result[$v] = [$k]; else $result[$v][] = $k; } print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [Sedan] => Array ( [0] => 2019 Honda Civic [1] => Rolls-Royce Phantom ) [Hatchback] => Array ( [0] => Maruti Suzuki Baleno ) )

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:
178.58 ms | 406 KiB | 5 Q