$con = mssql_connect($server_name,$username,$password);
$db_select = mssql_select_db($database_name);

$hostname = "123.xxx.xxx.xxx"; // usually is localhost, but if not sure, check with your hosting company, if you are with webune leave as localhost 
$db_user = "username"; // change to your database password 
$db_password = "password"; // change to your database password 
$database = "database_name"; // provide your database name 
 
# STOP HERE 
#################################################################### 
# THIS CODE IS USED TO CONNECT TO THE MSSQL DATABASE 
$db = mssql_connect($hostname, $db_user, $db_password);
mssql_select_db($database,$db); //Database Connect