Build an array of strings with every possible variation of multiple other strings

process_variations.php

<?php

$foo = array(
    array(
        'Black',
        'White',
        'Green'
    ),
    array(
        'Small',
        'Medium',
        'Large',
    ),
    array(
        'Auto',
        'Manual'
    )
);



function process_variations($types)
{
    $variations = array();

    $type = array_shift($types);
    foreach($type as $string)
    {
        $variations[] = $string;
    }

    foreach($types as $type)
    {
        $original = $variations;
        $variations = array();

        foreach($type as $new)
        {
            foreach($original as $prefix)
            {
                $variations[] = $prefix . $new;
            }
        }
    }

    return $variations;
}


print_r(process_variations($foo));



// Returns:
// Array
// (
//     [0] => BlackSmallAuto
//     [1] => WhiteSmallAuto
//     [2] => GreenSmallAuto
//     [3] => BlackMediumAuto
//     [4] => WhiteMediumAuto
//     [5] => GreenMediumAuto
//     [6] => BlackLargeAuto
//     [7] => WhiteLargeAuto
//     [8] => GreenLargeAuto
//     [9] => BlackSmallManual
//     [10] => WhiteSmallManual
//     [11] => GreenSmallManual
//     [12] => BlackMediumManual
//     [13] => WhiteMediumManual
//     [14] => GreenMediumManual
//     [15] => BlackLargeManual
//     [16] => WhiteLargeManual
//     [17] => GreenLargeManual
// )