<?php

    $romaiszamok = array(
        '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
    );

    $romaiszam = 'MCMLVI';
    $eredmeny = 0;

    foreach($romaiszamok as $key => $value){
        while(strpos($romaiszam, $key) === 0){
            $eredmeny += $value;
            $romaiszam = substr($romaiszam, strlen($key));
        }
    }

    echo $eredmeny;
?>