<?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] += $_POST[quantity]; } ?> <html> <head> <title> <?php if ($_POST[ordered]) { ?> 已经添加 <?php echo $curr_product[name]; ?> 到您的购物篮 <?php } else { ?> 添加 <?php echo $curr_product[name]; ?> 到您的购物篮 <?php } ?> </title> </head> <body> <?php if ($_POST[ordered]) { ?> <h1><?php echo $curr_product[name]; ?> 添加至购物篮成功</h1> <a href="cart.php">返回</a> 商品列表页面. <?php } else { ?> <h1>添加 <?php echo $curr_product[name]; ?> 到您的购物篮</h1> <form action="<?php echo $PHP_SELF; ?>" method="post"> 商品名称: <?php echo $curr_product[name]; ?> <br> 商品说明: <?php echo $curr_product[desc]; ?> <br> 商品单价: RMB<?php echo $curr_product[price]; ?> <br> 商品数量: <input type="text" size="7" name="quantity"> <input type="hidden" name="id" value="<?php echo $_GET[id]; ?>"> <input type="hidden" name="ordered" value="1"> <input type="submit" value="添加至购物栏"> </form> <?php } ?> </body> </html>
查看购物车的商品,代码如下:
<?php // // cart.php: // session_start(); require 'lib.inc.php'; //判断购物篮会话变量cart是否注册,不注册则注册cart变量 if (session_is_registered('cart')) { session_register('cart'); } // 如果购物篮没有初始化,则初始化购物篮 if (!isset($_SESSION[cart][num_items])) { $_SESSION[cart] = array("num_items" => 0, "products" => array()); } // From site_lib.inc, Loads the $master_products_list array LoadProducts(); //载入物品列表 ?> <html> <head> <title>演示会话跟踪的购物篮程序</title> </head> <body> <h1>欢迎进入网上商店</h1> <?php if ($_SESSION[cart][num_items]) { // If there is something to show ?> <h2>当前在购物篮里的物品</h2> <br> <table border="2" cellpadding="5" cellspacing="2"> <tr> <th> 商品名称 </th> <th> 商品说明 </th> <th> 单价 </th> <th> 数量 </th> <th> </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="数量更改"> </form> </td> </tr> <?php } ?> <tr> <td colspan="2" ALIGN="right"> <b>合计: </b> </td> <td colspan="2"> RMB:<?php echo $total; ?> </td> <td> </td> </tr> </table> <br> <br> <?php } ?> <h2>商店待出售的商品</h2> <br> <i> 我们提供以下商品待售: </i> <br> <table border="2" cellpadding="5" cellspacing="2"> <tr> <th> 商品名称 </th> <th> 商品说明 </th> <th> 单价 </th> <th> </th> </tr> <?php // Show all of the products foreach ($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; ?>"> 添加至购物篮 </a> </td> </tr> <?php } ?> </table>
修改购物车的数量,代码如下:
<?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> 数量修改 </title> </head> <body> <h1> 将数量: <?php echo $old_num; ?> 更改为 <?php echo $_POST[quantity]; ?></h1> <a href="cart.php">返回</a> 商品列表页面. </body> </html>
功能页面,用户把购物车里面的内容保存到txt数据库,代码如下:
<?php //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"); } ?>
希望本文所述对大家的php程序设计有所帮助。