Question

I have an array of all possible combinations of values, a bit like working out what monetary values I could make with only certain coins. Now I have an array built but much of the useful data are keys and not values.

A small snippet is below:
Each root key is an array with keys total, denomination and quantity. Each of the quantities multiplied by the denominations total the total. While I’ve been able to access the total easily enough I just can’t get a handle on the denominations and the quantities.

It’s my plan to output to separate radio buttons like so:

foreach($array as $arr)
{
    echo '<input type="radio" name="name" value="'.$arr[$total].'">';
    foreach($arr[denom] as $index => $d)
    {
        echo $d[qty][$index].' x '.$d[denom][$index].' = '.($qty[$index]*$denom[$index]).'<br>';
    }
}

Here’s the array I have, any help would be much appreciate, I’m usually great at this bot it’s driving me crazy

Array
(
    [2] => Array
        (
            [total] => 105
            [denom] => Array
                (
                    [0] => 105
                )

            [qty] => Array
                (
                    [0] => 1
                )

        )

    [3] => Array
        (
            [total] => 210
            [denom] => Array
                (
                    [0] => 105
                )

            [qty] => Array
                (
                    [0] => 2
                )

        )

    [4] => Array
        (
            [total] => 300
            [denom] => Array
                (
                    [0] => 300
                )

            [qty] => Array
                (
                    [0] => 1
                )

        )

    [5] => Array
        (
            [total] => 405
            [denom] => Array
                (
                    [0] => 300
                    [1] => 105
                )

            [qty] => Array
                (
                    [0] => 1
                    [1] => 1
                )

        )

    [6] => Array
        (
            [total] => 500
            [denom] => Array
                (
                    [0] => 500
                )

            [qty] => Array
                (
                    [0] => 1
                )

        )

    [7] => Array
        (
            [total] => 605
            [denom] => Array
                (
                    [0] => 500
                    [1] => 105
                )

            [qty] => Array
                (
                    [0] => 1
                    [1] => 1
                )

        )

Answer 1

Constant non-numeric array indices should be written like any other string, i.e. encapsulated in quotes.

foreach($array as $arr) {
    echo '<input type="radio" name="name" value="'.$arr['total'].'">';
    foreach($arr['denom'] as $index => $d){
        for ($j = 0;$j < count($denom);$j++) {
            echo $d['qty'][$j].' x '.$d['denom'][$j].' = ';
            echo ($d['qty'][$j]*$d['denom'][$j]) . '<br>';
        }
    }
}