public function regenerateId()
{
if (self::$started && !$this->regenerated) {
if (headers_sent($file, $line)) {
throw new Nette\InvalidStateException('Cannot regenerate session ID after HTTP headers have been sent' . ($file ? " (output started at {$file}:{$line})." : '.'));
}
if (session_status() === PHP_SESSION_ACTIVE) {
session_regenerate_id(TRUE);
session_write_close();
}
$backup = $_SESSION;
session_start();
$_SESSION = $backup;
}
$this->regenerated = TRUE;
}