filter with checkboxes

I have several checkboxes and menus to filter but I don't know how to do the filtering with the checkboxes in sql:

This is for example what you get in the URL:

index2.php?status=active%26amp;checkbox4=on%26amp;checkbox8=on

This is my sql:

$col1_master1canteen = ''-1'';
if (isset($_GET['status'])) {
?$col1_master1canteen = $_GET['status'];

}

...

and then..

...

SELECT * FROM canteen WHERE c_status = %s AND ??

Thank you for any further help!

filter with checkboxes

http://forums.adobe.com/thread/451266