PHP Programming Number To Words - Indonesia

numberToWordsID.php

/**
 *
 *  (C) 2020 Muhammad Fauzan
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    See the GNU General Public License: <http://www.gnu.org/licenses/>.
 *
 */

/**
 * Number To Words (ID)
 *
 * @param integer $number
 * @return string
 */
function numberToWordsID($number) 
{
    $max_size = pow(10,18);
    if (!$number) return "nol";
    $suffix = ""; //add suffix to fix scope problem

    if (is_int($number) && $number < abs($max_size)) 
    {            
        switch ($number) 
        {
            case $number < 0:
                $prefix = "negatif";
                $suffix = numberToWordsID(-1*$number);
                $string = $prefix . " " . $suffix;
                break;
            case 1:
                $string = "satu";
                break;
            case 2:
                $string = "dua";
                break;
            case 3:
                $string = "tiga";
                break;
            case 4: 
                $string = "empat";
                break;
            case 5:
                $string = "lima";
                break;
            case 6:
                $string = "enam";
                break;
            case 7:
                $string = "tujuh";
                break;
            case 8:
                $string = "delapan";
                break;
            case 9:
                $string = "sembilan";
                break;                
            case 10:
                $string = "sepuluh";
                break;            
            case 11:
                $string = "sebelas";
                break;            
            case 12:
                $string = "dua belas";
                break;            
            case 13:
                $string = "tiga belas";
                break;            
            case 15:
                $string = "lima belas";
                break;            
            case $number < 20:
                $string = numberToWordsID($number%10);
                if ($number == 18)
                {
                $suffix = " belas";
                } else 
                {
                $suffix = " belas";
                }
                $string .= $suffix;
                break;            
            case 20:
                $string = "dua puluh";
                break;            
            case 30:
                $string = "tiga puluh";
                break;            
            case 40:
                $string = "empat puluh";
                break;            
            case 50:
                $string = "lima puluh";
                break;            
            case 60:
                $string = "enam puluh";
                break;            
            case 70:
                $string = "tujuh puluh";
                break;            
            case 80:
                $string = "delapan puluh";
                break;            
            case 90:
                $string = "sembilan puluh";
                break;                
            case $number < 100:
                $prefix = numberToWordsID($number-$number%10);
                $suffix = numberToWordsID($number%10);
                $string = $prefix . "-" . $suffix;
                break;
            case $number < pow(10,3):                
                $getNumber = numberToWordsID(intval(floor($number/pow(10,2))));
                $getNumber = $getNumber == "satu" ? "se" : $getNumber . " ";
                $prefix = $getNumber . "ratus";
                if ($number%pow(10,2)) $suffix = " " . numberToWordsID($number%pow(10,2));
                $string = $prefix . $suffix;
                break;
            case $number < pow(10,6):
                $prefix = numberToWordsID(intval(floor($number/pow(10,3)))) . " ribu";
                if ($number%pow(10,3)) $suffix = numberToWordsID($number%pow(10,3));
                $string = $prefix . " " . $suffix;
                break;
            case $number < pow(10,9):
                $prefix = numberToWordsID(intval(floor($number/pow(10,6)))) . " juta";
                if ($number%pow(10,6)) $suffix = numberToWordsID($number%pow(10,6));
                $string = $prefix . " " . $suffix;
                break;                    
            case $number < pow(10,12):
                $prefix = numberToWordsID(intval(floor($number/pow(10,9)))) . " milliar";
                if ($number%pow(10,9)) $suffix = numberToWordsID($number%pow(10,9));
                $string = $prefix . " " . $suffix;    
                break;
            case $number < pow(10,15):
                $prefix = numberToWordsID(intval(floor($number/pow(10,12)))) . " triliun";
                if ($number%pow(10,12)) $suffix = numberToWordsID($number%pow(10,12));
                $string = $prefix . " " . $suffix;    
                break;        
            case $number < pow(10,18):
                $prefix = numberToWordsID(intval(floor($number/pow(10,15)))) . " kuadraliun";
                if ($number%pow(10,15)) $suffix = numberToWordsID($number%pow(10,15));
                $string = $prefix . " " . $suffix;    
                break;                    
        }
    }else{
        return "ERROR - $number<br/> Number must be an integer between -" . number_format($max_size, 0, ".", ",") . " and " . number_format($max_size, 0, ".", ",");
    }

    return $string;    
}

echo numberToWordsID(100000);
//EXPECTED OUTPUT : seratus ribu

echo numberToWordsID(100000);
//EXPECTED OUTPUT : seratus ribu

Nice job!

Sorry for typo , fixed numberToWordsId -> numberToWordsID

echo numberToWordsID(100000);
//EXPECTED OUTPUT : seratus ribu

Nice job!

Thanks!