select field for the last 100 years incl. age limit

select100years

<select>
  <option>year</option>
    <?php
      $range = 100;
      $limit = 18;
      $current = date('Y');
      $eldest = $current - $range;
      $recent = $current - $limit;

      foreach (range($recent, $eldest) as $year)
      {
        echo "<option value=\"".$year."\">".$year."</option>";
      }
    ?>
</select>