I thought that assuming you have grant rights on the db you can access it from anywhere.
$DatabaseName = "dbname"; //select db
$DbHostName = "address: port"; //set db address
//set db user & pword
$DbUserName = "user";
$DbPassWord = "password";
mysql_connect("$DbHostName", "$DbUserName", "$DbPassWord");
mysql_select_db("$DatabaseName") or die ("Unable to connect to SQL Server");