public function respond($data = null, $showNotification = true)
{
$this->response['data'] = $data;
self::fix_output_buffer();
if ($showNotification) {
$this->response['notification'] = N2Message::showAjax();
}
header("Content-Type: application/json");
if ($this->isError) {
header("HTTP/1.0 403 Forbidden");
}
echo json_encode($this->response);
n2_exit(true);
}