<?php

/**

 * Convert number in roman number

 * @created    2007-01-21

 * @author    Jerome IZARD

 * @version    1.0

 * @param integer the number

 * @return string the roman number

 */



function getRomanNumber($number)

{

    $basicRomanNumbers = array( 'M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I');

    $basicNumbers = array( 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1);

    

    // a number > 4999 can't be write in roman numbers

    if ($number > 4999) $number = 4999;

    

    // in roman numbers 0 don't exist

    if ($number <= 0) $number = 1;

    

    // decimal number can't be write in roman numbers

    $number = (int) $number;



    // initialisation of boucle's variables

    $romanNumber = '';

    $i = 0;



    while($number > O)

    {

        if($number >= $basicNumbers[$i]) 

        {

            $number = $number - $basicNumbers[$i];

            $romanNumber = $romanNumber.$basicRomanNumbers[$i];

        }

        else

        {

            $i++;

        }

    }

    return $romanNumber;

}

?>