I get a Ipv6 address instead of v4

Question

I'm trying to get my user's IPv4 address when they connect to my site but it gives me the IPv6 address instead:

2a01:cb04:8ed3:b300:d3d:71c1:a883:5b61

And I want an IPv4 address that looks like this:

255.255.255.1

here is my code :

function get_client_ip()
    {
        $ipaddress = '';
        if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
        } else if (isset($_SERVER['HTTP_X_FORWARDED'])) {
            $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
        } else if (isset($_SERVER['HTTP_FORWARDED_FOR'])) {
            $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
        } else if (isset($_SERVER['HTTP_FORWARDED'])) {
            $ipaddress = $_SERVER['HTTP_FORWARDED'];
        } else if (isset($_SERVER['REMOTE_ADDR'])) {
            $ipaddress = $_SERVER['REMOTE_ADDR'];
        } else {
            $ipaddress = 'UNKNOWN';
        }
        return $ipaddress;
    }

i've tried many approach but it keeps giving me weird ip adress. It was functionning on local but it is not on my server.