Online PHP editor | refs for D22nK

<?php $sum = 0; $master = array(); $arrColors = array('R', 'B', 'G' ,'Y'); $arrNumbers = array('1', '2', '3', '4'); foreach($arrNumbers as $num) { foreach($arrColor as $colorK => $colorV) { $temp = $colorV.' - '.$num; if ($num != $num[$colorK]) { $sum += $num; } array_push($master, $temp); } } print_r($master); echo "\n"; print_r ("The sum is ".$sum);