How to add Taobao to shopping cart php shopping cart example (Shen Jing)

if(! $session && ! $scid) {
/*
session is used to distinguish each shopping cart, which is equivalent to the ID number of each cart;
scid is only used to identify a shopping cart ID number, which can be regarded as The name of each cart;
When both the id and session value of the shopping cart do not exist, a new shopping cart is generated
*/
$session = md5(uniqid(rand()));
/*
Generate a unique shopping cart session number
rand() first generates a random number, uniqid() then generates a unique string based on the random number, and finally performs md5 on the string
*/
SetCookie(scid , $session, time() + 14400);
/*
Set the shopping cart cookie
Variable name: scid (I wonder if there is a $ sign missing here? =》Correction: Add "" to scid)
Variable Value: $session
Valid time: current time + 14400 seconds (within 4 hours)
For detailed usage of the setcookie function, please refer to the php manual~
*/
}
class Cart { //Start shopping cart class
function check_item( $table, $session, $product) {
/*
Check item (table name, session, item)
*/
$query = SELECT * FROM $table WHERE session=' $session' AND product=' $ product' ;
/*
Check to see if the 'product' is in the 'shopping cart' in the 'table'
That is, whether the product has been put into the shopping cart
*/
$result = mysql_query( $query) ;
if(! $result) {
return 0;
}
/*
Query failed
*/
$numRows = mysql_num_rows( $result);
if( $numRows == 0) {
return 0;
/ *
If not found, return 0
*/
} else {
$row = mysql_fetch_object( $result);
return $row->quantity;
/*
If found, return the quantity of the item
here It is necessary to explain the mysql_fetch_object function (will be used below):
[mysql_fetch_object() is similar to mysql_fetch_array(), with one difference - it returns an object instead of an array.】
The above sentence is taken from the PHP manual, it should be very clear~
To put it simply, to fetch a certain field in a record, you should use "->" instead of using subscripts like an array
* /
}
}
function add_item( $table, $session, $product, $quantity) {
/*
Add new item (table name, session, item, quantity)
*/
$qty = $this-> ;check_item( $table, $session, $product);
/*
Call the above function and first check whether the item of this type has been put into the car
*/
if( $qty == 0) {
$query = INSERT INTO $table (session, product, quantity) VALUES ;
$query .= (' $session', ' $product', ' $quantity') ;
mysql_query( $query);
/*If not in the car , then add the item to the car*/
} else {
$quantity += $qty; //If there is, increase the quantity on the original basis
$query = UPDATE $table SET quantity=' $quantity' WHERE session =' $session' AND ;
$query .= product=' $product' ;
mysql_query( $query);
/*
And modify the database
*/
}
}
function delete_item( $table, $session, $product) {
/*
Delete item (table name, session, item)
*/
$query = DELETE FROM $table WHERE session=' $session' AND product=' $product' ;
mysql_query( $query) ;
/*
Delete items of this type in the shopping cart
*/
}
function modify_quantity($table, $session, $product, $quantity) {
/*
Modify item quantity (table name, session, item, quantity)
*/
$query = UPDATE $table SET quantity=' $quantity' WHERE session=' $session' ;
$query .= AND product=' $product' ;
mysql_query( $query);
/*
Modify the quantity of the item to the value in the parameter
*/
}
function clear_cart( $table, $session) {
/*
Clear the shopping cart (nothing to say)
*/
$query = DELETE FROM $table WHERE session=' $session' ;
mysql_query( $query);
}
function cart_total( $table, $session) {
/*
Total price of items in the cart
*/
$query = SELECT * FROM $table WHERE session =' $session' ;
$result = mysql_query( $query);
/*
Take out all the items in the car first
*/
if(mysql_num_rows( $result) > 0) {
while( $row = mysql_fetch_object ( $result)) {
/*
If the quantity of items is > 0, then judge the price one by one and calculate
*/
$query = SELECT price FROM inventory WHERE product=' $row->product' ;
$invResult = mysql_query( $query);
/*
Find the price of the item from the inventory table
*/
$row_price = mysql_fetch_object( $invResult);
$total += ( $row_price->price * $ row->quantity);
/*
Total price += price of the item * quantity of the item
(Everyone should be able to understand)
*/
}
}
return $total; //Return the total price
}
function display_contents( $table, $session) {
/*
Get detailed information about all items in the car
*/
$count = 0;
/*
Count the number of items
Note that this variable is not only for counting items The quantity is counted, and more importantly, it will be used as a subscript in the return value array to distinguish each item!
*/
$query = SELECT * FROM $table WHERE session=' $session' ORDER BY id ;
$result = mysql_query( $query);
/*
First take out all the items in the car
*/
while( $ row = mysql_fetch_object( $result)) {
/*
Get detailed information for each item separately
*/
$query = SELECT * FROM inventory WHERE product=' $row->product' ;
$result_inv = mysql_query ( $query);
/*
Find related information about the item from the inventory table
*/
$row_inventory = mysql_fetch_object( $result_inv);
$contents[product][ $count] = $row_inventory-> ;product;
$contents[price][ $count] = $row_inventory->price;
$contents[quantity][ $count] = $row->quantity;
$contents[total][ $count] = ( $row_inventory->price * $row->quantity);
$contents[description][ $count] = $row_inventory->description;
/*
Put all the detailed information about the item into $contents Array
$contents is a two-dimensional array
The first set of subscripts distinguishes different information about each item (such as item name, price, quantity, etc.)
The second set of subscripts distinguishes different items (this is the previous The role of the defined $count variable)
*/
$count++; //Increase the number of items by one (i.e. the next item)
}
$total = $this->cart_total( $table, $session);
$contents [final] = $total;
/*
Call the cart_total function above at the same time, calculate the total price
and put it into the $contents array
*/
return $contents;
/*
Return the array
*/
}
function num_items( $table, $session) {
/*
Return the total number of item types (that is, it seems nonsense to count two identical items as one - -!)
*/
$query = SELECT * FROM $table WHERE session=' $session' ;
$result = mysql_query( $query);
$num_rows = mysql_num_rows( $result);
return $num_rows;
/*
Take out all the items in the car and get the ones affected by the operation The number of database rows, that is, the total number of items (nothing to say)
*/
}
function quant_items( $table, $session) {
/*
Returns the total number of all items (that is, two identical things count as two Items - -#)
*/
$quant = 0; // Total amount of items
$query = SELECT * FROM $table WHERE session=' $session' ;
$result = mysql_query( $query);
while( $ row = mysql_fetch_object( $result)) {
/*
Take out each item one by one
*/
$quant += $row->quantity; // Add the quantity of the item to the total
}
return $ quant; //Return the total amount
}
}

The above introduces how to add Taobao to the shopping cart. PHP shopping cart example (Shen Jing), including how to add Taobao to the shopping cart. I hope it will be helpful to friends who are interested in PHP tutorials.