Silly varible question

I know this is probably simple as all get out but it's early and I can't find an answer anywhere after searching for a while.... I need to assign a number to a variable and then use that variable in a session to store an array. It's for a shopping cart system I'm building. What I've got is: $count = 1; //First item in the cart passed from form to form $item = array(); $item[] = $_POST['phone']; $item[] = $_POST['category']; $item[] = $_POST['copy']; $item[] = $_POST['pic_style']; $item[] = $cost; $item[] = $image; session_register('item'); In the session the item is known as 'item'. What I need for it to be is 'item1' so when the customer chooses another product I can increase $count by 1 and have the next array with values stored as 'item2'. Thanks for any help, Ed