$routes->addRedirect with regex?

I have added this function to my BaseController class. It's simpler than the CI3 function in a few ways, but works for apache 2.4.41.

PHP Code:

        /**
         * CI4 lacks a redirect() function, and its recommended redirect approach does not work
         * in either __construct or initController functions, so I've added this, loosely based on
         * the CI3 redirect() function but some differences: doesn't bother using site_url for force FQDN
         * uri, cannot specify redirect method, doesn't use 307 for non-GET requests unless you explicitly specify
         * that code via parameter, doesn't allow empty uri param, only uses location header, no refresh method
         * 
         * @param string $uri
         * @param int $code
         */
        public function redirect($uri, $code = NULL)
        {
            if (!$uri) {
                throw new \Exception("You must specify a non-empty uri");
            }
            if (!is_null($code) && !is_int($code)) {
                throw new \Exception("If you specify an HTTP code, value must be an integer");
            }
            
            if (!$code)
            {
                // default code to 302
                $code = 302;
                
                // upgrade code to 303 if HTTP/1.1 or greater
                $matches = NULL;
                if (isset($_SERVER['SERVER_PROTOCOL'], $_SERVER['REQUEST_METHOD']) && preg_match('#^HTTP/([0-9\.]+)$#i', $_SERVER['SERVER_PROTOCOL'], $matches))
                {
                    // HTTP/1.1 introduced more specific redirect response codes
                    $version = isset($matches[1]) ? $matches[1] : "1.0";
                    if (version_compare($version, "1.1", ">="))
                    {
                        $code = 303;
                    }
                }
            }

            header('Location: ' . $uri, TRUE, $code);
            exit;
        }