<?php 

// 

// 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 "已經(jīng)注冊"; 

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]; 

} 

?>

<html> 

<head> 

    <title> 

    <?php if ($_POST[ordered]) {  ?> 

        已經(jīng)添加 <?php echo $curr_product[name]; ?> 到您的購物籃 

    <?php } else {  ?> 

        添加 <?php echo $curr_product[name]; ?> 到您的購物籃 

    <?php } ?> 

    </title> 

</head> 

<body> 

<?php if ($_POST[ordered]) {  ?> 

    <h1><?php echo $curr_product[name]; ?> 

        添加至購物籃成功</h1> 

    <a href="cart.php">返回</a> 商品列表頁面. 

<?php }  else {  ?> 

    <h1>添加 <?php echo $curr_product[name]; ?> 到您的購物籃</h1> 

    <form action="<?php echo $PHP_SELF; ?>" method="post"> 

    商品名稱: <?php echo $curr_product[name]; ?> 

    <br> 

    商品說明: <?php echo $curr_product[desc]; ?> 

    <br> 

    商品單價(jià): RMB<?php echo $curr_product[price]; ?> 

    <br> 

    商品數(shù)量: <input type="text" size="7" name="quantity"> 

    <input type="hidden" name="id" value="<?php echo $_GET[id]; ?>"> 

    <input type="hidden" name="ordered" value="1"> 

    <input type="submit" value="添加至購物欄"> 

    </form> 

<?php } ?> 

</body> 

</html>

查看購物車的商品,代碼如下:

復(fù)制代碼代碼如下:

<?php 

// 

// cart.php: 

// 

session_start(); 

require 'lib.inc.php'; 

//判斷購物籃會(huì)話變量cart是否注冊，不注冊則注冊cart變量 

if (session_is_registered('cart')) { 

    session_register('cart'); 

} 

// 如果購物籃沒有初始化，則初始化購物籃 

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(); //載入物品列表 

?>

<html> 

<head> 

    <title>演示會(huì)話跟蹤的購物籃程序</title> 

</head> 

<body> 

<h1>歡迎進(jìn)入網(wǎng)上商店</h1> 

<?php 

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

?> 

<h2>當(dāng)前在購物籃里的物品</h2> 

<br> 

<table border="2" cellpadding="5" cellspacing="2"> 

<tr> 

    <th> 

        商品名稱 

    </th> 

    <th> 

        商品說明 

    </th> 

    <th> 

        單價(jià) 

    </th> 

    <th> 

        數(shù)量 

    </th> 

    <th>&nbsp; 

    </th> 

</tr> 

<?php 

    // 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]; 

?> 

<tr> 

    <td> 

        <?php echo $master_products_list[$product_id][name]; ?> 

    </td> 

    <td> 

        <?php echo $master_products_list[$product_id][desc]; ?> 

    </td> 

    <td> 

        <?php echo $master_products_list[$product_id][price]; ?> 

    </td> 

    <td> 

        <form action="change_quant.php" method="post"> 

        <input type="hidden" name="id" value="<?php echo $i; ?>"> 

        <input type="text" size="3" name="quantity" 

                value="<?php echo $quantity; ?>"> 

    </td> 

    <td> 

        <input type="submit" value="數(shù)量更改"> 

        </form> 

    </td> 

</tr> 

<?php 

    } 

?> 

<tr> 

    <td colspan="2" ALIGN="right"> 

       <b>合計(jì): </b> 

    </td> 

    <td colspan="2"> 

        RMB：<?php echo $total; ?> 

    </td> 

 <td>&nbsp;</td> 

</tr> 

</table> 

<br> 

<br> 

<?php 

} 

?> 

<h2>商店待出售的商品</h2> 

<br> 

<i> 

    我們提供以下商品待售: 

</i> 

<br> 

<table border="2" cellpadding="5" cellspacing="2"> 

<tr> 

    <th> 

        商品名稱 

    </th> 

    <th> 

        商品說明 

    </th> 

    <th> 

        單價(jià) 

    </th> 

    <th>&nbsp; 

    </th> 

</tr> 

<?php 

    // Show all of the products 

    foreach ($master_products_list as $product_id => $item) { 

?> 

<tr> 

    <td> 

        <?php echo $item[name]; ?> 

    </td> 

    <td> 

        <?php echo $item[desc]; ?> 

    </td> 

    <td> 

        $<?php echo $item[price]; ?> 

    </td> 

    <td> 

        <a href="add_item.php?id=<?php echo $product_id; ?>"> 

            添加至購物籃 

        </a> 

    </td> 

</tr> 

<?php 

    } 

?> 

</table>

修改購物車的數(shù)量,代碼如下:

復(fù)制代碼代碼如下:

<?php 

// 

// 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); 

?> 

<html> 

<head> 

    <title> 

        數(shù)量修改 

    </title> 

</head> 

<body> 

    <h1> 將數(shù)量： <?php echo $old_num; ?> 更改為 

         <?php echo $_POST[quantity]; ?></h1> 

    <a href="cart.php">返回</a> 商品列表頁面. 

</body> 

</html>

功能頁面,用戶把購物車?yán)锩娴膬?nèi)容保存到txt數(shù)據(jù)庫,代碼如下:

復(fù)制代碼代碼如下:

<?php 

//物品數(shù)組 

$master_products_list = array(); 

//載入物品數(shù)據(jù)函數(shù) 

function LoadProducts() { 

    global $master_products_list; 

    $filename = 'products.txt'; 

    $fp = @fopen($filename, "r") 

        or die("打開 $filename 文件失敗"); 

    @flock($fp, 1) 

        or die("鎖定 $filename 文件失敗"); 

    //讀取文件內(nèi)容 

    while ($line = fgets($fp, 1024)) { 

        list($id, $name, $desc, $price) = explode('|', $line); //讀取每行數(shù)據(jù)，數(shù)據(jù)以| 格開 

        $id = trim($id); //去掉首尾特殊符號(hào) 

        $master_products_list[$id] = array("name" =>  $name, //名稱 

                                           "desc" =>  $desc, //說明 

                                           "price" => $price); //單價(jià) 

    } 

    @fclose($fp)  //關(guān)閉文件 

        or die("關(guān)閉 $filename 文件失敗"); 

} 

?>