hey! i am currently trying to use the php code for multiple pages in one file via the ?id= code. i am using the php file redir.php. here is the code:

$id = $_GET['id'];
if($id == ''){
regular page //code or include goes here
elseif($id == 1){
id 1 //code or include goes here
//repeat for all styles/pages.

and i cannot get it to work. it redirects you, but the page is blank. can you tell me what is wrong? thanks!