Konversi Angka ke format Rupiah & vice versa (C#, PHP, JavaScript, ActionScript 3.0)

convert-rupiah.js

/**
 * JavaScript Code Snippet
 * Convert Number to Rupiah & vice versa
 * https://gist.github.com/845309
 *
 * Copyright 2011-2012, Faisalman
 * Licensed under The MIT License
 * http://www.opensource.org/licenses/mit-license  
 *
 */
 
function convertToRupiah(angka)
{
	var rupiah = '';		
	var angkarev = angka.toString().split('').reverse().join('');
	for(var i = 0; i < angkarev.length; i++) if(i%3 == 0) rupiah += angkarev.substr(i,3)+'.';
	return 'Rp. '+rupiah.split('',rupiah.length-1).reverse().join('');
}
/**
 * Usage example:
 * alert(convertToRupiah(10000000)); -> "Rp. 10.000.000"
 */
 
function convertToAngka(rupiah)
{
	return parseInt(rupiah.replace(/,.*|[^0-9]/g, ''), 10);
}
/**
 * Usage example:
 * alert(convertToAngka("Rp 10.000.123")); -> 10000123
 */

convert_to_rupiah.php

<?php
	/**
	 * PHP Code Snippet
	 * Convert Number to Rupiah & vice versa
	 * https://gist.github.com/845309
	 *
	 * Copyright 2011-2012, Faisalman
	 * Licensed under The MIT License
	 * http://www.opensource.org/licenses/mit-license 	 
	 */
	 	 
	/**	 
	 *
	 * @param integer $angka number
	 * @return string
	 *
	 * Usage example:
	 * echo convert_to_rupiah(10000000); -> "Rp. 10.000.000"	 
	 */ 
	function convert_to_rupiah($angka)
	{
		return 'Rp. '.strrev(implode('.',str_split(strrev(strval($angka)),3)));
	}
	
	/**
	 *
	 * @param string $rupiah
	 * @return integer
	 *
	 * Usage example:
	 * echo convert_to_number("Rp. 10.000.123,00"); -> 10000123
	 */		 
	function convert_to_number($rupiah)
	{
		return intval(preg_replace(/,.*|[^0-9]/, '', $rupiah));
	}
	
?>

Rupiah.as

package
{
	/**
	 * ActionScript 3.0 Code Snippet
	 * Convert Number to Rupiah & vice versa
	 * https://gist.github.com/845309
	 *
	 * Copyright 2011-2012, Faisalman
	 * Licensed under The MIT License
	 * http://www.opensource.org/licenses/mit-license 
	 */

	public class Rupiah
	{		 	
		public static function convertToRupiah(angka:Number):String
		{
			var angkaRev:String = new String();
			var angkaRev2:String = new String();
			var i:Number = new Number();
			
			angkaRev = angka.toString().split('').reverse().join('');
			for(i = 0; i < angkaRev.length; i++) if(i%3 == 0) angkaRev2 += angkaRev.substr(i,3)+'.';
			return 'Rp. '+angkaRev2.split('',angkaRev2.length-1).reverse().join('');
		}		
		/**
		 * // Usage example: //
		 * var rp:Rupiah = new Rupiah();
		 * trace(rp.convertToRupiah(10000000)); -> "Rp. 10.000.000"
		 */

		public static function convertToAngka(rupiah:String):Number
		{
			return parseInt(rupiah.replace(/,.*|[^0-9]/g,''), 10);
		}
		/**
		 * // Usage example: //
		 * var rp:Rupiah = new Rupiah();
		 * trace(rp.convertToAngka("Rp 10.000.123,00")); -> 10000123
		 */ 
	}
}

Rupiah.cs

/**
 * C#.NET Code Snippet
 * Convert Number to Rupiah & vice versa
 * https://gist.github.com/845309
 *
 * Copyright 2012, Faisalman
 * Licensed under The MIT License
 * http://www.opensource.org/licenses/mit-license 
 */

using System;
using System.Globalization;
using System.Text.RegularExpressions;

public static class Rupiah
{
    public static string ToRupiah(this int angka)
    {
        return String.Format(CultureInfo.CreateSpecificCulture("id-id"), "Rp. {0:N}", angka);
    }
    /**
     * // Usage example: //
     * int angka = 10000000;
     * System.Console.WriteLine(angka.ToRupiah()); // -> Rp. 10.000.000
     */

    public static int ToAngka(this string rupiah)
    {      
        return int.Parse(Regex.Replace(rupiah, @",.*|\D", ""));
    }
    /**
     * // Usage example: //
     * string rupiah = "Rp 10.000.123,00";
     * System.Console.WriteLine(rupiah.ToAngka()); // -> 10000123
     */
}

tambahan nih untuk java

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;

public class RupiahUtils {
    public static void main(String[] args) {
        double harga = 250000000;
        System.out.printf("Harga Rupiah: %s %n", convertToRupiah(harga));
        System.out.printf("%.2f", harga);
    }

    public static String convertToRupiah(Double angka) {
        DecimalFormat kursIndonesia = (DecimalFormat) DecimalFormat.getCurrencyInstance();
        DecimalFormatSymbols formatRp = new DecimalFormatSymbols();

        formatRp.setCurrencySymbol("Rp. ");
        formatRp.setMonetaryDecimalSeparator(',');
        formatRp.setGroupingSeparator('.');

        kursIndonesia.setDecimalFormatSymbols(formatRp);
        return kursIndonesia.format(angka);
    }
   
    public static String convertToRupiahWithoutTrailingZeros(Double angka) {
        final String regex = ",00$";
        final String subst = ",-";
        final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
        final Matcher matcher = pattern.matcher(convertToRupiah(angka));

        // The substituted value will be contained in the result variable
        final String result = matcher.replaceAll(subst);
        return result;
    }
}

js substr deprecated, diganti dengan ini

function convertToRupiah(angka) {
  let number_string = new String(angka).replace(/[^,\d]/g, '').toString(),
    split = number_string.split(','),
    sisa = split[0].length % 3,
    rupiah = split[0].substring(0, sisa),
    ribuan = split[0].substring(sisa).match(/\d{3}/gi);

  // tambahkan koma jika yang di input sudah menjadi angka ribuan
  if (ribuan) {
    separator = sisa ? ',' : '';
    rupiah += separator + ribuan.join(',');
  }

  rupiah = split[1] != undefined ? rupiah + ',' + split[1] : rupiah;
  return (rupiah ? 'Rp. ' + rupiah : '') + ',-';
}