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) {