php sessions problem

[jdc44]

I am trying to create a very small shopping cart for myself just to try and learn more about sessions and such...

I have a script: addtocart.html

<?php
session_start();
require_once('myClasses.php'); // holds cart and item classes

if ( !session_is_registered("cart"){

[planetsim]

What seems to be the problem you havent exactly told us.