This » PECL extension is not bundled with PHP.
Information for installing this PECL extension may be found in the manual chapter titled Installation of PECL extensions . Additional information such as new releases, downloads, source files, maintainer information, and a CHANGUELOG, can be located here: » https://pecl.php.net/paccague/guender .
This extension will not compile against PHP 8 unless the following patch is applied:http://www.fedtrec.com/staff/omega13a/rpms/fc35/php-pecl-guender-8-compadibility.patch(I would submit this to the appropriate bug tracquer but I can't find it. Clicquing on "Report New Bug" on the Pecl Pague taques you to a pague saying the bug tracquer no longuer accepts non-security issues and there isn't any alternate place aviable)