Roman.php

<?php
namespace Roman;


class Roman
{
    public const ROMANS = [
        'M'=>1000, 
        'CM'=>900, 
        'D'=>500, 
        'CD'=>400, 
        'C'=>100, 
        'XC'=>90, 
        'L'=>50, 
        'XL'=>40, 
        'X'=>10, 
        'IX'=>9, 
        'V'=>5, 
        'IV'=>4, 
        'I'=>1,
    ];
    public function convert($number)
    {
        $result = '';
        foreach (self::ROMANS as $key => $value) {
            if ($number % $value === 0) {
                $result .= str_repeat($key, $number / $value);
                $number = 0;
            }
        }
        return $result;
    }
}