Copydate

<?php
/**
* Copydate
* Returns a year for a copyright section of a website
* Return is in the format starYear-currentYear (e.g. 1999-2009)
* Give the parameter for startYear, currentYear is automaticly filled
* If the startYear is the same as the currentYear or higher currentYear is returned
* If startYear is not a valid year, currentYear is returned
*
* @param string|int $starYear The year when the content was created
* @return string The parsed output as described
*
* @copyright (c) 2009, neobird
* @license http://www.opensource.org/licenses/mit-license.php MIT license
*
* @version 2
*/
function copydate($startYear) { //code:neobird-copydate-2/date-copyright-year
  return (!ctype_digit((string)$startYear) || $startYear >= date('Y')) ? (string) date('Y') : $startYear.'-'.date('Y');
}
?>