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diff --git a/user_guide_src/source/libraries/cart.rst b/user_guide_src/source/libraries/cart.rst deleted file mode 100644 index be343320d..000000000 --- a/user_guide_src/source/libraries/cart.rst +++ /dev/null @@ -1,398 +0,0 @@ -################### -Shopping Cart Class -################### - -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. - -.. contents:: - :local: - -.. raw:: html - - <div class="custom-index container"></div> - -******************** -Using the Cart Class -******************** - -Initializing the Shopping Cart Class -==================================== - -.. important:: The Cart class utilizes CodeIgniter's :doc:`Session - Class <sessions>` 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 :doc:`Session Documentation <sessions>`, 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:: - - $this->cart - -.. note:: The Cart Class will load and initialize the Session Class - automatically, so unless you are using sessions elsewhere in your - application, you do not need to load the Session class. - -Adding an Item to The Cart -========================== - -To add an item to the shopping cart, simply pass an array with the -product information to the ``$this->cart->insert()`` method, as shown -below:: - - $data = array( - 'id' => 'sku_123ABC', - 'qty' => 1, - 'price' => 39.95, - 'name' => 'T-Shirt', - 'options' => array('Size' => 'L', 'Color' => 'Red') - ); - - $this->cart->insert($data); - -.. important:: 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. - -:: - - $data = array( - 'id' => 'sku_123ABC', - 'qty' => 1, - 'price' => 39.95, - 'name' => 'T-Shirt', - 'coupon' => 'XMAS-50OFF' - ); - - $this->cart->insert($data); - -The ``insert()`` method will return the $rowid if you successfully insert a -single item. - -Adding Multiple Items to The Cart -================================= - -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. - -:: - - $data = array( - array( - 'id' => 'sku_123ABC', - 'qty' => 1, - 'price' => 39.95, - 'name' => 'T-Shirt', - 'options' => array('Size' => 'L', 'Color' => 'Red') - ), - array( - 'id' => 'sku_567ZYX', - 'qty' => 1, - 'price' => 9.95, - 'name' => 'Coffee Mug' - ), - array( - 'id' => 'sku_965QRS', - 'qty' => 1, - 'price' => 29.95, - 'name' => 'Shot Glass' - ) - ); - - $this->cart->insert($data); - -Displaying the Cart -=================== - -To display the cart you will create a :doc:`view -file </general/views>` with code similar to the one shown below. - -Please note that this example uses the :doc:`form -helper </helpers/form_helper>`. - -:: - - <?php echo form_open('path/to/controller/update/method'); ?> - - <table cellpadding="6" cellspacing="1" style="width:100%" border="0"> - - <tr> - <th>QTY</th> - <th>Item Description</th> - <th style="text-align:right">Item Price</th> - <th style="text-align:right">Sub-Total</th> - </tr> - - <?php $i = 1; ?> - - <?php foreach ($this->cart->contents() as $items): ?> - - <?php echo form_hidden($i.'[rowid]', $items['rowid']); ?> - - <tr> - <td><?php echo form_input(array('name' => $i.'[qty]', 'value' => $items['qty'], 'maxlength' => '3', 'size' => '5')); ?></td> - <td> - <?php echo $items['name']; ?> - - <?php if ($this->cart->has_options($items['rowid']) == TRUE): ?> - - <p> - <?php foreach ($this->cart->product_options($items['rowid']) as $option_name => $option_value): ?> - - <strong><?php echo $option_name; ?>:</strong> <?php echo $option_value; ?><br /> - - <?php endforeach; ?> - </p> - - <?php endif; ?> - - </td> - <td style="text-align:right"><?php echo $this->cart->format_number($items['price']); ?></td> - <td style="text-align:right">$<?php echo $this->cart->format_number($items['subtotal']); ?></td> - </tr> - - <?php $i++; ?> - - <?php endforeach; ?> - - <tr> - <td colspan="2"> </td> - <td class="right"><strong>Total</strong></td> - <td class="right">$<?php echo $this->cart->format_number($this->cart->total()); ?></td> - </tr> - - </table> - - <p><?php echo form_submit('', 'Update your Cart'); ?></p> - -Updating The Cart -================= - -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. - -:: - - $data = array( - 'rowid' => 'b99ccdf16028f015540f341130b6d8ec', - 'qty' => 1, - 'price' => 49.95, - 'coupon' => NULL - ); - - $this->cart->update($data); - -What is a Row ID? -***************** - -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. - - -*************** -Class Reference -*************** - -.. php:class:: CI_Cart - - .. attribute:: $product_id_rules = '\.a-z0-9_-' - - These are the regular expression rules that we use to validate the product - ID - alpha-numeric, dashes, underscores, or periods by default - - .. attribute:: $product_name_rules = '\w \-\.\:' - - These are the regular expression rules that we use to validate the product ID and product name - alpha-numeric, dashes, underscores, colons or periods by - default - - .. attribute:: $product_name_safe = TRUE - - Whether or not to only allow safe product names. Default TRUE. - - - .. php:method:: insert([$items = array()]) - - :param array $items: Items to insert into the cart - :returns: TRUE on success, FALSE on failure - :rtype: bool - - Insert items into the cart and save it to the session table. Returns TRUE - on success and FALSE on failure. - - - .. php:method:: update([$items = array()]) - - :param array $items: Items to update in the cart - :returns: TRUE on success, FALSE on failure - :rtype: bool - - This method permits changing the properties of a given item. - Typically it is called from the "view cart" page if a user makes changes - to the quantity before checkout. That array must contain the rowid - for each item. - - .. php:method:: remove($rowid) - - :param int $rowid: ID of the item to remove from the cart - :returns: TRUE on success, FALSE on failure - :rtype: bool - - Allows you to remove an item from the shopping cart by passing it the - ``$rowid``. - - .. php:method:: total() - - :returns: Total amount - :rtype: int - - Displays the total amount in the cart. - - - .. php:method:: total_items() - - :returns: Total amount of items in the cart - :rtype: int - - Displays the total number of items in the cart. - - - .. php:method:: contents([$newest_first = FALSE]) - - :param bool $newest_first: Whether to order the array with newest items first - :returns: An array of cart contents - :rtype: array - - Returns an array containing everything in the cart. You can sort the - order by which the array is returned by passing it TRUE where the contents - will be sorted from newest to oldest, otherwise it is sorted from oldest - to newest. - - .. php:method:: get_item($row_id) - - :param int $row_id: Row ID to retrieve - :returns: Array of item data - :rtype: array - - Returns an array containing data for the item matching the specified row - ID, or FALSE if no such item exists. - - .. php:method:: has_options($row_id = '') - - :param int $row_id: Row ID to inspect - :returns: TRUE if options exist, FALSE otherwise - :rtype: bool - - Returns TRUE (boolean) if a particular row in the cart contains options. - This method is designed to be used in a loop with ``contents()``, since - you must pass the rowid to this method, as shown in the Displaying - the Cart example above. - - .. php:method:: product_options([$row_id = '']) - - :param int $row_id: Row ID - :returns: Array of product options - :rtype: array - - 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. - - .. php:method:: destroy() - - :rtype: void - - Permits you to destroy the cart. This method will likely be called - when you are finished processing the customer's order.
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