PHP 8 and XML RPC

Hi

I need to add PECL package https://github.com/php/pecl-networking-xmlrpc/ to PHP 8

Howto add it in the PHP PECL extensions of CWP ?

Note: on my Rocky Linux 8.9, directory /opt/alt does not exists, it cause a PHP warning in CWP. Then I have this warning:
Notice: Undefined offset: 1 in /usr/local/cwpsrv/htdocs/resources/admin/modules/php_pecl.php on line 0

Thanks for helps
Regards