Convert decimal to roman numerals

Wordpress - convert decimal to roman numerals

/*integer to roman numeral converter*/
function numberToRoman($num) {
  // Make sure that we only use the integer portion of the value
  $n = intval($num);
  $result = '';

  // Declare a lookup array that we will use to traverse the number:
  $lookup = 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);

  foreach ($lookup as $roman => $value) {
    // Determine the number of matches
    $matches = intval($n / $value);
    // Store that many characters
    $result .= str_repeat($roman, $matches);
    // Substract that from the number
    $n = $n % $value;
  }
  // The Roman numeral should be built, return it
  return $result;
}