if (!empty($_POST['artist']) && mb_strlen($_POST['artist']) > 1) {
                            if (isset($data[$_POST['artist']]) && '' != $_POST['artist']) {
                                foreach (explode(',', trim($data[$_POST['artist']])) as $artist) {
                                    $criteria = new \Criteria('name', trim($artist));
                                    if ($artistsHandler->getCount($criteria) > 0) {