/**
* Get the visitor's id (using a tracking cookie)
*
* @return string
*/
public static function getVisitorId()
{
// check if tracking id is fetched already
if (self::$visitorId !== null) {
return self::$visitorId;
}
// get/init tracking identifier
self::$visitorId = CommonCookie::exists('track') ? (string) CommonCookie::get('track') : md5(uniqid() . SpoonSession::getSessionId());
// set/prolong tracking cookie
CommonCookie::set('track', self::$visitorId, 86400 * 365);
return self::getVisitorId();
}
