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本文实例讲述了php购物车实现方法。分享给大家供大家参考。具体分析如下:

这里我们为你提供个简单的php购物车代码,从增加购物产品与发生购买了,在商城开发中,这个功能是少不了的,我们不需要数据库,用了txt文本文件来操作用户购物的内容.

增加商品到购物车,代码如下:

代码如下:

//
// 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];
}
?>


    <br>     <br>         已经添加 到您的购物篮 <br>     <br>         添加 到您的购物篮 <br>     <br>    



   


        添加至购物篮成功


 
    返回 商品列表页面.

   

添加 到您的购物篮


 
   

    商品名称:
   

    商品说明:
   

    商品单价: RMB
   

    商品数量:
   
   
   
   



查看购物车的商品,代码如下:

代码如下:

//
// 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
?>


    演示会话跟踪的购物篮程序

 

 

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






   
   
   
   
   

  
    // 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];
?>

   
   
   
   
   

    }
?>

   
   
 


        商品名称
   

        商品说明
   

        单价
   

        数量
   
 
        
   

       
   

       
   

       
   

       

       
                        value="">
   

       
       
   

       合计:
   

        RMB:
   
 





}
?>
 

商店待出售的商品





    我们提供以下商品待售:





   
   
   
   

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

   
   
   
   

    }
 
?>

        商品名称
   

        商品说明
   

        单价
   
 
        
   

       
   

       
   

        $
   

       
            添加至购物篮
       

   

修改购物车的数量,代码如下:

代码如下:

//
// 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);
?>
 


    <br>         数量修改 <br>    


   

将数量: 更改为
        


    返回 商品列表页面.

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:

代码如下:

//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");
}
?>


很简单,我们只用了4个文件就实现用php 做好购物车功能,好了这只是一款简单的php购物车代码更复杂的需要考虑更多更好.

希望本文所述对大家的php程序设计有所帮助。

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