Products variants

product_variants.php

// https://stackoverflow.com/a/33259643

function get_combinations($arrays) {
    $result = array(array());
    foreach ($arrays as $property => $property_values) {
        $tmp = array();
        foreach ($result as $result_item) {
            foreach ($property_values as $property_key => $property_value) {
                $tmp[] = $result_item + array($property_key => $property_value);
            }
        }
        $result = $tmp;
    }
    return $result;
}