Browntape Question no 3 Answer

question3.php

<?php
     $result = array();
    function getSku($key, $params)
    {
            $rv = array();
            $i  = count($params);
            while (0 < $i--) {
                    array_unshift($rv, $params[$i][$key % count($params[$i])]);
                    $key = (int) ($key / count($params[$i]));
            }
            return $rv;
    }
    
    function generateSku($product_name, $arr)
    {
            $len = 1;
            foreach ($arr as $item) {
                    $len = $len * count($item);
            }
            for ($i = 0; $i < $len; $i++) {
                    $a = getSku($i, $arr);
                    
                    $result[]="". $product_name . "-" . join('  ', $a);
            }
            return $result;
    }
    $new    = array(
            'color' => array( 'black','white'),
            'size' => array( '16gb','32gb','64gb')
    );
    $array1 = array_values($new);
    $result = generateSku("Iphone 4s", $array1);
    print_r($result);
?>