private static function get_url_to_custom_style(&$stylesheet_urls) { $uploads = FrmStylesHelper::get_upload_base(); $saved_css_path = '/formidable/css/formidablepro.css'; if (is_readable($uploads['basedir'] . $saved_css_path)) { $url = $uploads['baseurl'] . $saved_css_path; } else { $url = admin_url('admin-ajax.php') . '?action=frmpro_css'; } $stylesheet_urls['formidable'] = $url; }