Use right IP when IP string contain more than one IP adress

[everyx]

Hi, my site is use free cloudflare CDN, and all users IP address in Mibew backend is x.x.x.x (x.x.x.x), we should use the IP in the parentheses.

I just review the code, and I think the problem is in this code:

            $count = preg_match_all(
                "/(?:(?:[0-9]{1,3}\.){3}[0-9]{1,3})/",
                $function['arguments']['ip'],
                $matches
            );

the $function['arguments']['ip'], can not return a IP string as x.x.x.x (x.x.x.x) format but just return the first IP (not the IP in the parentheses), but I'm not sure how to get complete IP string contain two IP address.