3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [ [ 'firstName' => 'T', 'lastName' => 'B', 'email' => 'glh@gmail.com' ], [ 'firstName' => 'L', 'lastName' => 'Kr', 'email' => 'email1@gmail.com' ], [ 'firstName' => 'T', 'lastName' => 'B', 'email' => 'glh@gmail.com' ] ]; $res = array_intersect_key($arr, array_unique(array_column($arr, 'email'))); print_r($res);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [firstName] => T [lastName] => B [email] => glh@gmail.com ) [1] => Array ( [firstName] => L [lastName] => Kr [email] => email1@gmail.com ) )

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:
193.9 ms | 406 KiB | 5 Q