How Do I Figure Out The Database_Host And Database_Name For My Sharepoint SQL Server?

I'm trying to access my sharepoint sql server through php, and normally I would set the connection like this:

define('DB_USER', 'user');
define('DB_PASSWORD', 'pass');
define('DB_HOST', 'database host');
define('DB_NAME', 'database name');

$dbc = mssql_connect(DB_HOST, DB_USER, DB_PASSWORD) or die('coudlnt connect to mssql server' .mssql_error());
mssql_select_db(DB_NAME) or die('couldnt connect to that database:' .mssql_error());

How do I figure out what the DB_HOST and DB_NAME is?

And I'm assuming my normal username and password to the server would work, right?