Fungerande kod //Max

<form action="cctest.php" method="post">
    <input type="text" placeholder="1000kr" name="onethousand">
    <input type="text" placeholder="500kr" name="fivehundred">
    <input type="text" placeholder="200kr" name="twohundred">
    <input type="text" placeholder="100kr" name="onehundred">
    <input type="text" placeholder="50kr" name="fifty">
    <input type="text" placeholder="20kr" name="twenty">
    <input type="text" placeholder="10kr" name="ten">
    <input type="text" placeholder="5kr" name="five">
    <input type="text" placeholder="2kr" name="two">
    <input type="text" placeholder="1kr" name="one">
    <button type="submit" name="submit">Submit</button>
</form>

<?php

if(isset($_POST['submit'])) {

    $billValues = array(
        $_POST['onethousand'],
        $_POST['fivehundred'],
        $_POST['twohundred'],
        $_POST['onehundred'],
        $_POST['fifty'],
        $_POST['twenty']
    );

    $coinValues = array(
        $_POST['ten'],
        $_POST['five'],
        $_POST['two'],
        $_POST['one']
    );

    $billDenomValues = array(1000, 500, 200, 100, 50, 20);
    $coinDenomValues = array(10, 5, 2, 1);

    $amountOfBills = array_sum($billValues);
    $amountOfCoins = array_sum($coinValues);
    $valueOfBills = 0;
    $valueOfCoins = 0;

    $i = 0;

    while($i < 6) {
        $valueOfBills += $billValues[$i] * $billDenomValues[$i];
        $i++;
    }

    $i = 0;

    while($i < 4) {
        $valueOfCoins += $coinValues[$i] * $coinDenomValues[$i];
        $i++;
    }

}

?>