Online PHP editor | refs for DQI2K

<?php $arr = Array ( 0 => Array ( 0 => 'Red', 1 => 'Steel' ), 1 => Array ( 0 => 'Red', 1 => 'Wood' ) , 2 => Array ( 0 => 'Blue', 1 => 'Wood' ) ); $colors = $materials = array(); foreach ($arr as $a){ $colors[] = $a[0]; $materials[] = $a[1]; } $colors = array_count_values($colors); $materials = array_count_values($materials); print_r($colors); print_r($materials);