I use this:

server {
server_name _;
server_name_in_redirect off;
fastcgi_param SERVER_NAME $server_name;
}

but when I inspect $_SERVER["SERVER_NAME"] I get this "_", but I would
like to get the domain name, so I change to this:

fastcgi_param  SERVER_NAME        $host;

But, is this the right thing to do?

Marcos Neves
+55 44 9918-8488