PHP Tutorial: combine cookies and arrays to implement shopping cart

The results of many php functions are given in arrays. The most common is mysql_fetch_array ()

The results of many php functions are given in arrays. The most common is mysql_fetch_array (),
Including the obtained string information to generate an array, which is then decomposed into the string's function explode (); implode ();

I have never written about implementation like shopping cart before. I consciously belong to the stupid type. I wrote it for a week and thought about the shopping cart processing program.
Because there has never been a door to the class, it is still a process-oriented approach.

The essence of the method I used is: store the cookie into the array to add, delete, and modify the array. each set of records in the array is the information of a commodity (quantity, price, etc)



The solution to shopping cart is to use cookies to record a two-dimensional array. One dimension represents every commodity. Two dimensions include the commodity id, the commodity quantity, and so on. they can be added by themselves. they are all two dimensions, and the attributes of each commodity you are willing to include will be added.

The following operations are generally performed on items in the shopping cart: add items, modify the quantity of items, delete items, and clear the shopping cart.
These operations are targeted at cookies. Each time, the array in the cookie is retrieved, added, modified, and deleted, and recorded in the cookie. To clear the shopping cart, you can simply set the cookie with the same name as null.

The following are the specific operation functions I have written:

// Add to shopping cart
Function addcart ($ goods_id, $ goods_num ){

$ Cur_cart_array = unserialize (stripslashes ($ _ COOKIE ['shop _ cart_info ']);
If ($ cur_cart_array = ""){

$ Cart_info [0] [] = $ goods_id;
$ Cart_info [0] [] = $ goods_num;

Setcookie ("shop_cart_info", serialize ($ cart_info ));

} Elseif ($ cur_cart_array <> ""){

// Returns the maximum value of the array key name in reverse order.
$ Ar_keys = array_keys ($ cur_cart_array );
Rsort ($ ar_keys );
$ Max_array_keyid = $ ar_keys [0] + 1;

// Traverse the current shopping cart array
// Traverses the 0 value of each item information array. if the key value is 0 and the values are the same, the same item exists in the shopping cart.
Foreach ($ cur_cart_array as $ goods_current_cart ){
Foreach ($ goods_current_cart as $ key => $ goods_current_id ){
If ($ key = 0 and $ goods_current_id = $ goods_id ){
Echo"