Convert number to words using php script

Following  code easy to use "convert number to words" using php Programming.

<?php
// define function convert_number_to_words
function convert_number_to_words($number) {

$hyphen      = '-';
$conjunction = ' and ';
$separator   = ' ';
$negative    = 'negative ';
$decimal     = ' point ';
$dictionary  = 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',
100                 => 'hundred',
1000                => 'thousand',
1000000             => 'Lakh',
1000000000          => 'billion',
1000000000000       => 'trillion',
1000000000000000    => 'quadrillion',
1000000000000000000 => 'quintillion'
);

if (!is_numeric($number)) {
return false;
}

if (($number >= 0 && (int) $number < 0) || (int) $number < 0 - PHP_INT_MAX) {
// overflow
trigger_error(
    'convert_number_to_words only accepts numbers between -' . PHP_INT_MAX . ' and ' . PHP_INT_MAX,
    E_USER_WARNING
);
return false;
}

if ($number < 0) {
return $negative . convert_number_to_words(abs($number));
}

$string = $fraction = null;

if (strpos($number, '.') !== false) {
list($number, $fraction) = explode('.', $number);
}

switch (true) {
case $number < 21:
    $string = $dictionary[$number];
    break;
case $number < 100:
    $tens   = ((int) ($number / 10)) * 10;
    $units  = $number % 10;
    $string = $dictionary[$tens];
    if ($units) {
        $string .= $hyphen . $dictionary[$units];
    }
    break;
case $number < 1000:
    $hundreds  = $number / 100;
    $remainder = $number % 100;
    $string = $dictionary[$hundreds] . ' ' . $dictionary[100];
    if ($remainder) {
        $string .= $conjunction . convert_number_to_words($remainder);
    }
    break;
default:
    $baseUnit = pow(1000, floor(log($number, 1000)));
    $numBaseUnits = (int) ($number / $baseUnit);
    $remainder = $number % $baseUnit;
    $string = convert_number_to_words($numBaseUnits) . ' ' . $dictionary[$baseUnit];
    if ($remainder) {
        $string .= $remainder < 100 ? $conjunction : $separator;
        $string .= convert_number_to_words($remainder);
    }
    break;
}

if (null !== $fraction && is_numeric($fraction)) {
$string .= $decimal;
$words = array();
foreach (str_split((string) $fraction) as $number) {
    $words[] = $dictionary[$number];
}
$string .= implode(' ', $words);
}
return $string;
}   

//call function convert_number_to_words

$amount=30256;
echo "<strong>Total Amount in Numbers: </strong>".$amount."<br>";
echo "<strong>Total Amount in Words:</strong> ".strtoupper(convert_number_to_words($amount)." only");
?>