PHP shopping cart implementation method, PHP shopping cart implementation_PHP tutorial

php shopping cart implementation method, php shopping cart implementation

The example in this article describes the implementation method of php shopping cart. Share it with everyone for your reference. The specific analysis is as follows:

Here we provide you with a simple php shopping cart code, from adding shopping products to making purchases. In mall development, this function is indispensable. We do not need a database and use txt text files to operate user shopping. content.

Add items to the shopping cart with the following code:

Copy code The code is as follows:

//
// add_item.php:
// Add an item to the shopping cart.
//
session_start();
if (session_is_registered('cart')) {
Session_register('cart');
}

require 'lib.inc.php'; // LoadProducts()

LoadProducts(); // Load products in $master_products_list

// Make $curr_product global
$curr_product = array();

// Loop through all the products and pull up the product
// that we are interested in

foreach ($master_products_list as $prod_id => $product) {
If (trim($prod_id) == trim($_GET[id])) {
          $curr_product = $product;
}
}

// Register our session
//session_register('cart');
//if(session_is_registered('cart')) echo "Already registered";

if ($_POST[ordered]) { // If they have chosen the product

Array_push($_SESSION[cart][products], array(trim($_POST[id]), $_POST[quantity]));
$_SESSION[cart][num_items] += $_POST[quantity];
}
?>

         Added to shopping basket successfully

Return product list page.

Add to your shopping cart

Product name:


Product description:


Product unit price: RMB


Product quantity:

View the items in the shopping cart, the code is as follows:

Copy code The code is as follows:

//
// cart.php:
//
session_start();

require 'lib.inc.php';
//Determine whether the shopping basket session variable cart is registered. If not, register the cart variable
if (session_is_registered('cart')) {
Session_register('cart');
}

// If the shopping basket is not initialized, initialize the shopping basket
if (!isset($_SESSION[cart][num_items])) {
$_SESSION[cart] = array("num_items" => 0,
"products" => array());
}
// From site_lib.inc, Loads the $master_products_list array
LoadProducts(); //Load item list
?>

Welcome to the online store

if ($_SESSION[cart][num_items]) { // If there is something to show
?>

Items currently in the shopping basket

// Loop through the products
Foreach ($_SESSION[cart][products] as $i => $product) {
          $product_id = $product[0];
$quantity = $product[1];

$total += $quantity *
(double)$master_products_list[$product_id][price];
?>







}
?>

Product name	Product description	Unit price	Quantity
			value="">	​​​​
& Lt; b & gt; Total: & lt;/b & gt;		RMB：

}
?>

Items for sale in the store

We offer the following items for sale:










// Show all of the products
foreach ($master_products_list as $product_id => $item) {
?>






}

?>

Product name	Product description	Unit price
		$	Add to basket

Modify the quantity in the shopping cart, the code is as follows:

Copy code The code is as follows:

//
// change_quant.php:
// Change the quantity of an item in the shopping cart.
//
session_start();
if (session_is_registered('cart')) {
Session_register('cart');
}

// Typecast to int, making sure we access the
// right element below
$i = (int)$_POST[id];

// Save the old number of products for display
// and arithmetic
$old_num = $_SESSION[cart][products][$i][1];

if ($_POST[quantity]) {
$_SESSION[cart][products][$i][1] = $_POST[quantity]; //change the quantity
} else {
Unset($_SESSION[cart][products][$i]); // Send the product into oblivion
}

// Update the number of items
$_SESSION[cart][num_items] = ($old_num >$_POST[quantity]) ?
$_SESSION[cart][num_items] - ($old_num-$_POST[quantity]) :
$_SESSION[cart][num_items] + ($_POST[quantity]-$old_num);
?>

Change quantity: to
                                                                                                                                                         Return product list page.



Function page, the user saves the contents of the shopping cart to the txt database, the code is as follows:

Copy code The code is as follows:

//Item array
$master_products_list = array();


//Load item data function
function LoadProducts() {
global $master_products_list;
$filename = 'products.txt';

$fp = @fopen($filename, "r")
or die("Failed to open $filename file");
@flock($fp, 1)
or die("Failed to lock $filename file");

//Read file content
While ($line = fgets($fp, 1024)) {
           list($id, $name, $desc, $price) = explode('|', $line); //Read each row of data, the data is formatted with |
​​​​ $id = trim($id); //Remove the first and last special symbols
           $master_products_list[$id] = array("name" => $name, //Name
“desc” => $desc, //Description
"price" => $price); //Unit price
}

@fclose($fp) //Close the file
or die("Failed to close $filename file");
}
?>

It's very simple. We only use 4 files to implement the shopping cart function using PHP. Well, this is just a simple PHP shopping cart code. More complex code needs to be considered more and better.

I hope this article will be helpful to everyone’s PHP programming design.

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