decimal_roman_php

<?php

$input = readline();

function decimal_roman($num) {

    $output = "";
    $roman_value = array("M"=>1000,
                        "CM"=>900,
                        "D"=>500,
                        "CD"=>400,
                        "C"=>100,
                        "XC"=>90,
                        "L"=>50,
                        "LX"=>40,
                        "X"=>10,
                        "IX"=>9,
                        "V"=>5,
                        "IV"=>4,
                        "I"=>1
                        );

    foreach ($roman_value as $key => $value) {
        while($num>=$value) {
            $output .= $key;
            $num -= $value;
        }
    }
    return $output;
}
echo decimal_roman($input);


?>