current_url

function current_url() {
        $currentUrl = (($_SERVER['HTTPS'] != "on") ? 'http://' : 'https://');
        $currentUrl .= $_SERVER['HTTP_HOST'];
        //$currentUrl .= ($_SERVER['SERVER_PORT'] != "80") ? ':' . $_SERVER['SERVER_PORT'] : '';
        $currentUrl .= $_SERVER['REQUEST_URI'];
        $currentUrl .= (!empty($_SERVER['QUERY_STRING']) && !preg_match("/(\?)/i", $_SERVER['REQUEST_URI'])) ? '?' . $_SERVER['QUERY_STRING'] : '';
        return $currentUrl;
    }