PHP relay help and mysql

Question

I have a list of categories on my webpage. They are stored on mysql and each category has an id number next to it.

The categories are in divs that when selected change color and whatnot, and when not selected, another color. Only one can be selected at a time.

I am trying to figure out how to tell the webpage, which cat has been selected, and in turn, it will make the selected cat take on the selected style traits

thank you

Answer 1

Sounds pretty simple to me. Why don't you embed a GET variable into the link of the category?

<a href="www.mypage.com?category=This_Category">This Category</a>

then, on reload:

if(!empty($_GET['category'])) { $selectedCat = $_GET['category']; }

Answer 2

Make sure each div has its own unique id, using javascript add an onclick event to each div, create a function called colourChange() to fire when clicked on (or whatever you want to call it). Then, you can have a variable set to the id of the field that is currently highlighted, if that id is the same as the field just clicked, do nothing, or remove the class / highlighting and add it to the new one.

JQuery will make this super easy for you.

EDIT: Perhaps I misunderstood, I was under the impression you wanted a client side solution, please disregard this if you wanted PHP to handle it on page loads.