Php Online Shopping Mall Shopping Cart Design Code

First, the database design of the shopping cart: 1. id2.goods _ id item ID3.session _ id shopping cart ID4.goods _ sn item code 5. goods_name product name 6. shop_price goods mall price 7. goods_price: the actual price of the product (the difference between shop_price and shop_price is that when the price is discounted, shop_price is the price of the product before the discount.

First, the database design of the shopping cart: 1. id 2. goods_id product ID 3. session_id shopping cart ID 4. goods_sn product code 5. goods_name product name 6. shop_price goods mall price 7. goods_price: the actual price of the product (the difference between shop_price and shop_price is that when the price is discounted, shop_price is the price of the product before the discount.

First, the database design of the shopping cart:
1. id
2. goods_id product ID
3. session_id shopping cart ID
4. goods_sn product code
5. goods_name Product Name
6. shop_price
7. The real price of goods_price (the difference between shop_price and shop_price is that when the discount is made, shop_price is the price of the product before the discount, and goods_price is the price after the discount)
8. goods_number quantity
9. weight product weight
10. goods_attr product attributes (such as color and size)
11. promote_code: The Promotion Code (The rule pattern identification code for product promotion)
12. is_promote promotion ID
13. stock_id inventory ID
The database structure is like this. Of course, if there are other requirements, such as the product's rebate points, whether the product is a virtual product, whether the product is delivered on behalf of the other, you can add a new identifier.

Second, this shopping cart requires that you can add items to the shopping cart without logging on to the user. This is also a very popular method recently, so in the shopping cart database design, the user_id field is not added, because the user can also put the item into the shopping cart without logging in.

To identify which user the shopping cart is, session_id is used, which is the unique identifier of the user's corresponding shopping cart. This code can be generated in the Cart constructor of the shopping Cart object:

Java code

1. /**
2. * Shopping methods for shopping cart
3. * Website: www.jbxue.com
4. * @ Param string $ cart_id: ID of the shopping cart
5. */
6. Public function _ construct ()
7. {
8. Zend_Session: start ();
9. $ This-> _ session = new Zend_Session_Namespace ('shopcart ');
10. If (! Isset ($ this-> _ session-> session_id ))
11. {
12. $ This-> _ session-> session_id = md5 (uniqid (mt_rand (), true ));
13. $ This-> _ session-> info = array ();
14. }
15. $ This-> _ cart_id = $ this-> _ session-> session_id;
16. }

There are advantages and disadvantages in everything. The advantage of this design is that you can use the shopping cart without logging on. The disadvantage is that the two share a computer, and the shopping cart cannot determine which person the product is.
Third, add a product to the shopping cart.
Add a commodity to the shopping cart. Here, I think of it as two actions.
First Action: add the item to the shopping cart database.
The second action is to find and display all the items in the shopping cart.
The first action is:

Java code

1. /**
2. * Add product
3. * Website: www.jbxue.com
4. */
5. Public function goodsAddAction ()
6. {
7. // Add product use get request
8. $ Goods_id = $ this-> _ getParam ('goods _ id'); // item id
9. $ Goods_spec = $ this-> _ getParam ('filter _ name'); // item attributes (color, size)
10. $ Goods_number = $ this-> _ getParam ('goods _ number'); // number of items
11. $ Promote_name = $ this-> _ getParam ('promote _ name', 'default'); // promotion policy
12. // Get the shopping cart instance
13. $ CartB = $ this-> _ getCart ();
14. $ CartB-> goodsAdd ($ goods_id, $ goods_spec, $ goods_number, $ promote_name );
15. // After the product is successfully added, go to the next step to find all the items in the shopping cart and display them.
16. $ This-> _ showMessage (Bll_Context: isError ()? Bll_Context: getError (): 'added to the shopping basket! ', Bll_Context: getRecirect ('/orderv2 '), 3 );
17. }

Line 2 of the code above:
$ CartB-> goodsAdd ($ goods_id, $ goods_spec, $ goods_number, $ promote_name );

The second action is:

Java code

1. /**
2. * Shopping list
3. */
4. Public function indexAction ()
5. {
6. // Get the shopping cart instance
7. $ CartB = $ this-> _ getCart ();
8. // List all items in the shopping cart
9. $ This-> view-> goods_list = $ cartB-> goodsViewList ();
10. // Obtain the list of rule instances used to display rule messages
11. $ This-> view-> tips = $ cartB-> goodsTipRules ();
12. // Total number of items in the shopping cart
13. $ This-> view-> total_number = $ cartB-> getTotalGoodsNumber ();
14. // Get the total amount of goods in the shopping cart
15. $ This-> view-> total_amount = $ cartB-> getTotalAmount ();
16. }

The first and second actions must be separated, because the user can directly click the shopping cart without adding the item.

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