/**

 * This function convert a rfc2822 date format (e.g. Thu, 30 Aug 2012 14:28:25 +0200)

 * into a iso8601 date format (e.g. 2012-08-30T14:28:25+02:00).

 *

 * @param string $date - The date sting

 * @return string

 */

function rfc2822Toiso8601($date) {

return date(DATE_ATOM, strtotime ($date));

}