<?
// Make the values shorter and easier to work with
$id = $_GET['id'];
$type = $_GET['type'];

// Connect to the database server
$connection = mysql_connect($server, $username, $password) or die("Unable to connect to server!");

// Select database
$db = mysql_select_db($database, $connection) or die("Can't select database!");

// Build the query
$query = "SELECT id, type FROM database WHERE id=$id AND type=$type";

// Query the server
$result = mysql_query($query);

// Code to process this information
?>

<?php ### this is PHP5 compatible code, by the way
if (isset($_GET['id'])) $id = $_GET['id']; // the isset() makes it PHP5 compatible
if (isset($_GET['type'])) $type = $_GET['type'];
# etc... the rest of the *if isset URL 'name', set variable to that*
$query = "
SELECT your_column1,your_column2,etc FROM table_name
        WHERE id=$id,
                  type=$type;
"; // Or however you're trying to query the db
mysql_connect (/* your connection arguments */);
$result = mysql_query ($query);
### The rest of the page, whatever you want to do with it
?>

<?php
function dbconnect () {
        // I forget all that I did in here, but it was something like..
        if (! mysql_connect ("localhost", "root", "password")) {
                die ("Couldn't connect: " . mysql_error());
        }
        if (! mysql_select_db ("whatever")) {
                die ("oh poo: " . mysql_error());
        }
}
?>

<?php
function dbconnect () {
        if (! pg_connect("host=localhost dbname=whatever user=root password=password")) {
                die("crap: " . pg_last_error());
        }
}
?>