/**
* Regenerates the session ID.
* @throws InvalidStateException
* @return void
*/
public function regenerateId()
{
if (self::$started && !$this->regenerated) {
if (headers_sent($file, $line)) {
throw new InvalidStateException("Cannot regenerate session ID after HTTP headers have been sent" . ($file ? " (output started at $file:$line)." : "."));
}
session_regenerate_id(TRUE);
session_write_close();
$backup = $_SESSION;
session_start();
$_SESSION = $backup;
$this->response->removeDuplicateCookies();
}
$this->regenerated = TRUE;
}