Problem Solved.thanks!

This shows you 2 ways of generating a $_GET post: http://www.w3schools.com/php/php_get.asp

Basically just include the category's id for constructing whatever it is you're building.

Originally Posted by mattgoldman

I have a catalog with several links and one generic listing page. I would like the sql results to change based on which category the user clicks on. Is $_GET the best way to pass the information to the listing page from the index? If so, how do I go about doing this? Thanks so much!

It's hard to understand what you want. But you can make link like this
_http://yourdomain/cat?=X
then

PHP Code:

<?php
if (isset($_GET['cat']){
  use sql query here with WHERE cat=X
  while (){
    show each item or do something here
  }
}
?>

Ok?