<?php
function AmountInWords(float $amount)
{
    $amount_after_decimal = round($amount - ($num = floor($amount)), 2) * 100;

    // Check if there is any number after decimal
    $amt_hundred = null;
    $count_length = strlen($num);
    $x = 0;
    $string = array();
    $change_words = array(
        0 => 'Zero', 1 => 'One', 2 => 'Two',
        3 => 'Three', 4 => 'Four', 5 => 'Five', 6 => 'Six',
        7 => 'Seven', 8 => 'Eight', 9 => 'Nine',
        10 => 'Ten', 11 => 'Eleven', 12 => 'Twelve',
        13 => 'Thirteen', 14 => 'Fourteen', 15 => 'Fifteen',
        16 => 'Sixteen', 17 => 'Seventeen', 18 => 'Eighteen',
        19 => 'Nineteen', 20 => 'Twenty', 30 => 'Thirty',
        40 => 'Fourty', 50 => 'Fifty', 60 => 'Sixty',
        70 => 'Seventy', 80 => 'Eighty', 90 => 'Ninety'
    );
    $here_digits = array('', 'Hundred', 'Thousand', 'Lakh', 'Crore');
    while ($x < $count_length) {
        $get_divider = ($x == 2) ? 10 : 100;
        $amount = floor($num % $get_divider);
        $num = floor($num / $get_divider);
        $x += $get_divider == 10 ? 1 : 2;
        if ($amount) {
            $add_plural = (($counter = count($string)) && $amount > 9) ? 's' : null;
            $amt_hundred = ($counter == 1 && $string[0]) ? ' and ' : null;
            $string[] = ($amount < 21) ? $change_words[$amount] . ' ' . $here_digits[$counter] . $add_plural . '
       ' . $amt_hundred : $change_words[floor($amount / 10) * 10] . ' ' . $change_words[$amount % 10] . '
       ' . $here_digits[$counter] . $add_plural . ' ' . $amt_hundred;
        } else $string[] = null;
    }
    $implode_to_Rupees = implode('', array_reverse($string));
    $get_paise = ($amount_after_decimal > 0) ? "And " . ($change_words[$amount_after_decimal / 10] . "
   " . $change_words[$amount_after_decimal % 10]) . ' Paise' : '';
    return ($implode_to_Rupees ? $implode_to_Rupees . 'Rupees ' : '') . $get_paise;
}

$amount_to_be_convert = 1200.85;

if (isset($_POST['submit'])) {
    $amount_to_be_convert = $_POST['amount'];
}
$paid_ammount = round($amount_to_be_convert);
$get_round_amount = AmountInWords($paid_ammount);
$get_exact_amount = AmountInWords($amount_to_be_convert);
?>

<div class="container p-4">
    <div class="row">
        <div class="col-md-6">
            <form method="post" action="">
                <div class="mb-3">
                    <label for="amount" class="form-label">Amount / Number (it can except upto RS. 999999998)</label>
                    <input type="text" class="form-control" id="amount" name="amount" value="<?php echo $amount_to_be_convert; ?>">
                </div>
                <button type="submit" name="submit" class="btn btn-primary">Convert</button>
            </form>

            <br>

            <h2> Rounding off Result without paisa::</h2>
            <p class="text-success"><b>
                    <?php echo $get_round_amount ?></b></p>
            <hr>

            <h2> Exact Result with paisa</h2>
            <p class="text-success"><b>

                    <?php echo $get_exact_amount ?></b></p>

        </div>
    </div>
</div>