In File requiring the connect:

function connect($state,$db)
{
    if($state='open') {include ('scripts/script_connect.php?db='.$db);} elseif ($state='close') { mysql_close();}
}


In the Connect File:

$database_server = "localhost";
$database_user = "root";
$database_password = "";
$database_name = $_GET['db'];

$connection = mysql_connect($database_server, $database_user, $database_password);
if (!$connection)
{
    die('Connnection could not be established due to the following error: ' . mysql_error());
}
mysql_select_db($database_name, $connection) or die('The database could not be selected due to the following error:' . mysql_error());