/** * Return the URL to the admin panel page. * * Return the URL to the admin panel page. * * @since 5.0.0 * @access static * * @return string URL to the admin panel page. */ public static function get_url() { $url = self::$url; if (empty($url)) { if (is_multisite()) { $url = add_query_arg(array('page' => self::get_slug()), network_admin_url('index.php')); } else { $url = add_query_arg(array('page' => self::get_slug()), admin_url('index.php')); } self::$url = $url; } return $url; }