Help giving article its own url

I need to have this so my article has its own url. So say i go to articles.php?article=23 it will display only the article with the id 23.

Here is what I have thats not working:

<?
$conn = mysql_connect('','','') or trigger_error("SQL", E_USER_ERROR);
$db = mysql_select_db('',$conn) or trigger_error("SQL", E_USER_ERROR);


$sql = "SELECT id, post FROM articles";
$result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR);
$r = mysql_fetch_row($result);


switch ($_GET['article']) {

    case $list['id'];

	while ($list = mysql_fetch_assoc($result)) {
            echo $list['post'];
	}

        break;
}
?>

I'm not really sure what you're trying to do there, but you should be selecting the article you're after through the query. Something like this:

$sql = "SELECT id, post FROM articles WHERE id='" . mysql_real_escape_string($_GET['article']) . "'";
$result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR);
$r = mysql_fetch_assoc($result);
echo $r['post'];

mysql_real_escape_string

That's just an example of how to fetch the data. In your actual application you'll probably want some checking to make sure that an article exists and if it doesn't show some error.

Oh, and using shorttags is never a good idea.

Thanks mate. Works great.

About the error page would it be something like

<?
else {
echo mysql_error()
}
?>