Int To Roman

IntToRoman.php

<?php
class Solution {
    private $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
    ];
    /**
     * @param Integer $num
     * @return String
     */
    function intToRoman($num) {
        $returnRoman = "";
        while($num > 0) {
            foreach($this->romans as $roman => $value) {
                if($num >= $value){
                    $num -= $value;
                    $returnRoman .= $roman;
                    break;
                }
            }
        }
        return $returnRoman;
    }
}