<?php

// index.php

$config['db'] = $_GET['db'];
include('functions.php');
$data = GrabData($_GET['uid']);

// functions.php

require_once('config.php');

// config.php

if ($config['db'] == "1") {
/* SQL Connection Info  */
$sql['host'] = 'localhost';
$sql['user'] = 'user';
$sql['pass'] = 'pass';
$sql['db'] = 'db';
}

?>