Adding a field/variable to URL

[erme]

Hi,

 

I currently have something like this:

 

$extrapart = (isset($_GET['id'][0]))?"WHERE ID='".mysql_real_escape_string($_GET['id'])."'":"";
$_SESSION['extra'] = $extrapart;

$pageheader = mysql_query("SELECT DISTINCT ID FROM TableName $extrapart");

 

not written by me which is why im so confused.

 

I currently go to this which works fine:

 

http://site.co.uk/page.php?id=dev002

 

which pulls ID from the db. But I want to be able to include the county (which is in the db) that is associated with that ID like this:

 

http://site.co.uk/page.php?county=devon&id=dev002

 

Hope someone can make sense of what I'm trying to explain!

 

Thanks to all that help!

[erme]

Would I be right in saying I need to do something like this:

 

$extrapart = (isset($_GET['id'][0]))?"WHERE ID='".mysql_real_escape_string($_GET['id'])."'":"";

$extrapart2 = (isset($_GET['county'][0]))?"WHERE County='".mysql_real_escape_string($_GET['county'])."'":"";

$_SESSION['extra'] = $extrapart $extrapart2;