3v4l.org

run code in 300+ PHP versions simultaneously
<?php $color_ids = [ 'green' => [1, 2, 3], 'blue' => [4, 5], 'red' => [6], 'pink' => [7, 8, 9], 'yellow' => [10] ]; $select = ['green', 'red', 'yellow']; var_export( array_merge( ...array_values( array_intersect_key( $color_ids, array_flip($select) ) ) ) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 1, 1 => 2, 2 => 3, 3 => 6, 4 => 10, )

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:
30.74 ms | 405 KiB | 5 Q