basic shopping cart problem

[juanc]

Hi I'm trying to make a basic shopping based on the idea that an item selected get's pushed into an array and then that array get's saved into a session variable.

 

If I did this..

 

<?php

$shop = array("plasma TV","DVD recorder","mountain bike","coffee maker");
$_SESSION['cart'] = $shop;

?>

I'm able to access $_SESSION['cart'] with all the array values on a completely different page no problem. However I want to have a page listing items for sale then each time a customer clicks on an item that get's added to $_SESSION['cart'] and of course each time you are able to see the latest snapshot of the cart.

 

I wrote this myself.........

<?php

// 1st page

<a href=cart.php?id=1>Computer</a><br />
<a href=cart.php?id=2>CD collection</a>

// then on cart.php

if(!in_array($_GET['id'],$_SESSION['cart']))
{
$items_in_cart[] = $_SESSION['cart'];
$new_entry[] = $_GET['id'];
$all_the_items = array_merge($items_in_cart,$new_entry);
$all_the_items = $_SESSION['cart'];
}


?>

what basically happens is if I do a foreach loop on $_SESSION['cart'] it's fine...I see all the original items (Plasma TV etc) plus the new one selected....however if I were to leave the page and then re visit I only see the original items in the original $shop array ...and not the latest one to be selected.

 

Hope someone can help.

[chigley]

You're forgetting session_start() at the top of each page.

[juanc]

chigley I've done that......it's just I haven't bothered entering that much detail onto what I've posted here...

 

To sum my question.........how do you keep inserting values into an array that stays persistent across different pages?