RTMediaAdmin::linkback PHP Method

        public function linkback()
        {
            //Fixme: remove code looks like old setting save code new code at app/helper/RTMediaSettings.php
            $linkback = filter_input(INPUT_POST, 'linkback');
            if (isset($linkback) && $linkback) {
                return rtmedia_update_site_option('rtmedia-add-linkback', true);
            } else {
                return rtmedia_update_site_option('rtmedia-add-linkback', false);
            }
        }