【发布时间】：2010-01-08 13:29:52
【问题描述】：
我基于会话制作了简单的 PHP 购物车。来自博克“使用 php & Mysql 构建您自己的数据库驱动的网站”
它包含3个文件：控制器index.php，以及两个模板文件catalog.html.php、cart.html.php >
问题是当我点击“查看您的购物车”链接时，会话将结束并且 $_session['cart'] 将自动取消设置或其他东西
对不起，我不能解释清楚 所以这里是代码：
/* index.php - 控制器*/
$items = array(
array('id' => '1', 'desc' => 'Candian-Australian Dictionary',
'price' => 24.95),
array('id' => '2', 'desc' => 'As-new parachute (never opened)',
'price' => 1000),
array('id' => '3', 'desc' => 'Songs of the Goldfish (2CD set)',
'price' => 19.99),
array('id' => '4', 'desc' => 'Simply JavaScript (SitePoint)',
'price' => 39.95));
session_start();
if (!isset($_SESSION['cart']))
{
$_SESSION['cart'] = array();
}
if (isset($_POST['action']) and $_POST['action'] == 'Buy')
{
// Add item to the end of the $_SESSION['cart'] array
$_SESSION['cart'][] = $_POST['id'];
header('Location: .');
exit();
}
if (isset($_POST['action']) and $_POST['action'] == 'Empty cart')
{
// Empty the $_SESSION['cart'] array
unset($_SESSION['cart']);
header('Location: ?cart');
exit();
}
if (isset($_GET['cart']))
{
$cart = array();
$total = 0;
foreach ($_SESSION['cart'] as $id)
{
foreach ($items as $product)
{
if ($product['id'] == $id)
{
$cart[] = $product;
$total += $product['price'];
break;
}
}
}
include 'cart.html.php';
exit();
}
include 'catalog.html.php';
?>
/* catalog.html.php - 显示所有产品*/
<?php include_once $_SERVER['DOCUMENT_ROOT'] .
'/includes/helpers.inc.php'; ?>
<!DOCTYPE html PUBLIC "-//W3c//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head><title>Product catalog</title>
<meta http-equiv="content-type"
content="text/html; charest=utf-8"/>
<style type="text/css">
table {
border-collapse: collapse;
}
td, th {
border: 1px solid black;
}
</style>
</head>
<body>
<p>Your shopping cart contains <?php
echo count($_SESSION['cart']); ?> items.</p>
<p><a href="?cart">View your cart</a></p>
<table border="1">
<thead>
<tr>
<th>Item Description</th>
<th>Price</th>
</tr>
</thead>
<tbody>
<?php foreach ($items as $item): ?>
<tr>
<td><?php htmlout($item['desc']); ?></td>
<td>
$<?php echo number_format($item['price'], 2); ?>
</td>
<td>
<form action="" method="post">
<div>
<input type="hidden" name="id" value="<?php
htmlout($item['id']); ?>"/>
<input type="submit" name="action" value="Buy"/>
</div>
</form>
</td>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<p>All prices are in imaginary dollars.</p>
</body>
</html>
/* cart.html.php - 显示购物车中的产品*/
<?php include_once $_SERVER['DOCUMENT_ROOT'] .
'/includes/helpers.inc.php'; ?>
<!DOCTYPE html PUBLIC "-//W3c//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head><title>Shopping cart</title>
<meta http-equiv="content-type"
content="text/html; charest=utf-8"/>
<style type="text/css">
table {
border-collapse: collapse;
}
td, th {
border: 1px solid black;
}
</style>
</head>
<body>
<h1>Your Shopping Cart</h1>
<?php if (count($cart) > 0): ?>
<table>
<thead>
<tr>
<th>Item Description</th>
<th>Price</th>
</tr>
</thead>
<tfoot>
<tr>
<td>Total:</td>
<td>$<?php echo number_format($total, 2); ?></td>
</tr>
</tfoot>
<tbody>
<?php foreach ($cart as $item): ?>
<tr>
<td><?php htmlout($item['desc']); ?></td>
<td>
$<?php echo number_format($item['price'], 2); ?>
</td>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<?php else: ?>
<p>Your cart is empty!</p>
<?php endif; ?>
<form action="?" method="post">
<p>
<a href="?">Continue shopping</a> or
<input type="submit" name="action" value="Empty cart"/>
</p>
</form>
</body>
</html>
提前致谢
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