Online PHP editor | refs for DRMKI

<?php $ar = Array ( 0 => Array ( 0 => 'Red', 1 => 'Blue', 2 => 'Black', 3 => 'White', 4 => 'Silver'), 1 => Array ( 0 => 'Yellow' ,1 => 'Green', 2 => 'Pink', 3 => 'Purple'), 2 => Array ( 0 => 'Orange', 1 => 'Olive', 2 => 'Lime') ); array_walk_recursive($ar, function($v, $k) use (&$list) {return $list[] = $v;}); print_r($list);