//
// 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 "已经注册";

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];
 
}
?>

   



   

        添加至购物篮成功

    返回 商品列表页面.

   

添加 到您的购物篮

//
// cart.php:  www.111com.net
//
session_start();

require 'lib.inc.php';
//判断购物篮会话变量cart是否注册，不注册则注册cart变量
if (session_is_registered('cart')) {
    session_register('cart');
}

// 如果购物篮没有初始化，则初始化购物篮
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(); //载入物品列表
?>

   

欢迎进入网上商店

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

当前在购物篮里的物品

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

商店待出售的商品

?>

//
// 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);
?>

   


   

将数量： 更改为
        

//物品数组
$master_products_list = array();

//载入物品数据函数
function LoadProducts() {
    global $master_products_list;
    $filename = 'products.txt';

    $fp = @fopen($filename, "r")
        or die("打开 $filename 文件失败");
    @flock($fp, 1)
        or die("锁定 $filename 文件失败");

    //读取文件内容
    while ($line = fgets($fp, 1024)) {
        list($id, $name, $desc, $price) = explode('|', $line); //读取每行数据，数据以| 格开
        $id = trim($id); //去掉首尾特殊符号
        $master_products_list[$id] = array("name" =>  $name, //名称
                                           "desc" =>  $desc, //说明
                                           "price" => $price); //单价
    }

    @fclose($fp)  //关闭文件
        or die("关闭 $filename 文件失败");
}
?>