The Cart Class permits items to be added to a session that stays active
while a user is browsing your site. These items can be retrieved and
displayed in a standard “shopping cart” format, allowing the user to
update the quantity or remove items from the cart.

Important

The Cart library is DEPRECATED and should not be used.
It is currently only kept for backwards compatibility.

Please note that the Cart Class ONLY provides the core “cart”
functionality. It does not provide shipping, credit card authorization,
or other processing components.

The Cart class utilizes CodeIgniter’s Session
Class to save the cart information to a database, so
before using the Cart class you must set up a database table as
indicated in the Session Documentation, and set the
session preferences in your application/config/config.php file to
utilize a database.

To initialize the Shopping Cart Class in your controller constructor,
use the $this->load->library() method:

$this->load->library('cart');

Once loaded, the Cart object will be available using:

$this->cart

Note

The Cart Class will load and initialize the Session Class
automatically, so unless you are using sessions elsewhere in your
application, you do not need to load the Session class.

The first four array indexes above (id, qty, price, and
name) are required. If you omit any of them the data will not be
saved to the cart. The fifth index (options) is optional. It is intended
to be used in cases where your product has options associated with it.
Use an array for options, as shown above.

The five reserved indexes are:

id - Each product in your store must have a unique identifier.
Typically this will be an “sku” or other such identifier.

qty - The quantity being purchased.

price - The price of the item.

name - The name of the item.

options - Any additional attributes that are needed to identify
the product. These must be passed via an array.

In addition to the five indexes above, there are two reserved words:
rowid and subtotal. These are used internally by the Cart class, so
please do NOT use those words as index names when inserting data into
the cart.

Your array may contain additional data. Anything you include in your
array will be stored in the session. However, it is best to standardize
your data among all your products in order to make displaying the
information in a table easier.

By using a multi-dimensional array, as shown below, it is possible to
add multiple products to the cart in one action. This is useful in cases
where you wish to allow people to select from among several items on the
same page.

To update the information in your cart, you must pass an array
containing the Row ID and one or more pre-defined properties to the
$this->cart->update() method.

Note

If the quantity is set to zero, the item will be removed from
the cart.

$data=array('rowid'=>'b99ccdf16028f015540f341130b6d8ec','qty'=>3);$this->cart->update($data);// Or a multi-dimensional array$data=array(array('rowid'=>'b99ccdf16028f015540f341130b6d8ec','qty'=>3),array('rowid'=>'xw82g9q3r495893iajdh473990rikw23','qty'=>4),array('rowid'=>'fh4kdkkkaoe30njgoe92rkdkkobec333','qty'=>2));$this->cart->update($data);

You may also update any property you have previously defined when
inserting the item such as options, price or other custom fields.

The row ID is a unique identifier that is generated by the cart code
when an item is added to the cart. The reason a unique ID is created
is so that identical products with different options can be managed
by the cart.

For example, let’s say someone buys two identical t-shirts (same product
ID), but in different sizes. The product ID (and other attributes) will
be identical for both sizes because it’s the same shirt. The only
difference will be the size. The cart must therefore have a means of
identifying this difference so that the two sizes of shirts can be
managed independently. It does so by creating a unique “row ID” based on
the product ID and any options associated with it.

In nearly all cases, updating the cart will be something the user does
via the “view cart” page, so as a developer, it is unlikely that you
will ever have to concern yourself with the “row ID”, other than making
sure your “view cart” page contains this information in a hidden form
field, and making sure it gets passed to the update() method when
the update form is submitted. Please examine the construction of the
“view cart” page above for more information.

This method permits changing the properties of a given item.
Typically it is called from the “view cart” page if a user makes changes
to the quantity before checkout. That array must contain the rowid
for each item.

$newest_first (bool) – Whether to order the array with newest items first

Returns:

An array of cart contents

Return type:

array

Returns an array containing everything in the cart. You can sort the
order by which the array is returned by passing it TRUE where the contents
will be sorted from newest to oldest, otherwise it is sorted from oldest
to newest.

Returns TRUE (boolean) if a particular row in the cart contains options.
This method is designed to be used in a loop with contents(), since
you must pass the rowid to this method, as shown in the Displaying
the Cart example above.

Returns an array of options for a particular product. This method is
designed to be used in a loop with contents(), since you
must pass the rowid to this method, as shown in the Displaying the
Cart example above.