php实现购物车功能上

<p style="text-align: left">本文分两篇为大家介绍

PHP实现购物车功能

，具有一定的参考价值，相信大家一定喜欢。

1、需求分析

<p style="text-align: left">我们需要找到一种将数据库连接到用户的浏览器的方法。用户能够按目录浏览商品。用户应该能够从商品目录中选取商品以便此后的购买。我们也要能够记录他们选中的物品。当用户完成购买，要合计他们的订单，获取运送商品细节，并处理付款。创建一个管理界面，以便管理员在上面添加、编辑图书和目录。

2、解决方案

<p style="text-align: left">2.1 用户视图

管理员视图

2.3 Book-O-Rama中的文件列表

3、实现数据库3.1 创建book_sc数据库的sql 代码

rush:sql;"> CREATE DATABASE book_sc; #创建book_sc数据库

USE book_sc; #使用book_sc数据库

CREATE TABLE customers #创建用户表
(
customerid INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,name CHAR(60) NOT NULL,address CHAR(80) NOT NULL,city CHAR(30) NOT NULL,state CHAR(10),zip CHAR(10),country CHAR(20) NOT NULL
);

CREATE TABLE orders #创建订单表
(
orderid INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,customerid INT UNSIGNED NOT NULL,amount FLOAT(6,2),date DATE NOT NULL,order_status CHAR(10),ship_name CHAR(60) NOT NULL,ship_address CHAR(80) NOT NULL,ship_city CHAR(30) NOT NULL,ship_state CHAR(20),ship_zip CHAR(10),ship_country CHAR(20) NOT NULL
);

CREATE TABLE books #创建图书表
(
isbn CHAR(13) NOT NULL PRIMARY KEY,author CHAR(80),title CHAR(100),catid INT UNSIGNED,price FLOAT(4,2) NOT NULL,description VARCHAR(255)
);

CREATE TABLE categories #创建目录表
(
catid INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,catname CHAR(60) NOT NULL
);

CREATE TABLE order_items #订单物品表
(
orderid INT UNSIGNED NOT NULL,isbn CHAR(13) NOT NULL,item_price FLOAT(4,quantity tinyint UNSIGNED NOT NULL,PRIMARY KEY(orderid,isbn)
);

CREATE TABLE admin #管理员表
(
username char(16) NOT NULL PRIMARY KEY,password CHAR(40) NOT NULL
);

GRANT SELECT,INSERT,UPDATE,DELETE
on book_sc.*
to book_sc@localhost IDENTIFIED by 'password';

3.2 数据库测试数据文档

rush:sql;"> USE book_sc;

INSERT INTO books VALUES ('0672329166','Luke Welling and Laura Thomson','PHP and MysqL Web Development',1,49.99,'PHP & MysqL Web Development teaches the reader to develop dynamic,secure e-commerce web sites. You will learn to integrate and implement these technologies by following real-world examples and working sample projects.');
INSERT INTO books VALUES ('067232976X','Julie Meloni','Sams Teach Yourself PHP,MysqL and Apache All-in-One',34.99,'Using a straightforward,step-by-step approach,each lesson in this book builds on the prevIoUs ones,enabling you to learn the essentials of PHP scripting,MysqL databases,and the Apache web server from the ground up.');
INSERT INTO books VALUES ('0672319241','Sterling Hughes and Andrei Zmievski','PHP Developer\'s Cookbook',39.99,'Provides a complete,solutions-oriented guide to the challenges most often faced by PHP developers\r\nWritten specifically for experienced Web developers,the book offers real-world solutions to real-world needs\r\n');

INSERT INTO categories VALUES (1,'Internet');
INSERT INTO categories VALUES (2,'Self-help');
INSERT INTO categories VALUES (5,'Fiction');
INSERT INTO categories VALUES (4,'Gardening');

INSERT INTO admin VALUES ('admin',sha1('admin'));

4、实现在线目录

主页-目录

由以下代码实现： 4.1 index.PHP

rush:PHP;"> PHP

/**

@author switch
@copyright 2015
网站首页，显示系统中的图书目录
*/
//require_once语句和require语句完全相同,唯一区别是PHP会检查该文件是否已经被包含过,如果是则不会再次包含。
require_once('book_sc_fns.PHP');

session_start(); //开始会话
do_html_header('Welcome to Book-O-Rama'); //页头

echo "

Please choose a category:

$cat_array = get_categories(); //从数据库获取目录

display_categories($cat_array); //显示目录链接

if(isset($_SESSION['admin_user'])) //如果是管理员，显示管理员操作
display_button("admin.PHP","admin-menu","Admin Menu");
do_html_footer(); //页尾
?>

4.2 book_fns.PHP 文件中的函数get_categories()

query($query); if(!$result) //查询失败，返回false return false; $num_cats = @$result ->num_rows; if($num_cats == 0) //数据库中无目录，返回false return false; $result = db_result_to_array($result); return $result; }

4.3 output_fns.PHP 文件中的函数 display_categories()

rush:PHP;"> function display_categories($cat_array) //输出目录 { if(!is_array($cat_array)) { echo "

No categories currently available

"; return; } echo "

PHP

"; do_html_URL($url,$title); echo "

"; echo "

"; }

4.4 db_fns.PHP 文件中的函数db_result_to_array()

for($count = 0; $row = $result ->fetch_assoc(); $count++)
$res_array[$count] = $row;

return $res_array;
}

Internet目录下的所有图书

代码实现：

PHP

rush:PHP;"> /**

@author switch
@copyright 2015
显示特定目录包含的所有图书
*/
//require_once语句和require语句完全相同,如果是则不会再次包含。
require_once('book_sc_fns.php');

session_start();

@$catid = $_GET['catid'];
$name = get_category_name($catid);

do_html_header($name);

$book_array = get_books($catid);

display_books($book_array);

//如果是管理员，显示管理界面按钮
if(isset($_SESSION['admin_user']))
{
display_button("index.php","continue","Continue Shopping");
display_button("admin.php","Admin Menu");
display_button("edit_category_form.php?catid=". $catid,"edit-category","Edit Category");
}
else //否则显示主界面按钮
{
display_button("index.php","continue-shopping","Continue Shopping");
}
do_html_footer();
?>

4.6 book_fns.PHP 文件中的函数get_category_name()

query($query); if(!$result) //查询失败，原因为查询出错 return false;

$num_cats = @$result ->num_rows;

if($num_cats == 0) //查询失败，原因为无目录
return false;
$row = $result ->fetch_object();
return $row ->catname;
}

4.8 book_fns.PHP 文件中的函数get_books()

$conn = db_connect();
$query = "select * from books where catid = '". $catid ."'";
$result = @$conn ->query($query);
if(!$result) //查询失败，原因为查询出错
return false;

$num_books = @$result ->num_rows;

if($num_books == 0) //查询失败，原因为无图书
return false;

$result = db_result_to_array($result);
return $result;
}

4.9 output_fns文件中的函数 display_books()

rush:PHP;"> function display_books($book_array) //输出图书 { if(!is_array($book_array)) echo "

No books currently available in this category

"; else //有图书，建表 { echo "foreach($book_array as $row)
{
$url = "show_book.PHP?isbn=". $row['isbn'];
echo "<tr><td>";
// 如果图片存在
if(@file_exists("images/". $row['isbn'] .".jpg"))
{
$title = "<img src=\"images/". $row['isbn'] .".jpg\" style=\"border: 1px solid black\"/>";
do_html_URL($url,$title);
}
else
echo " ";

echo "</td><td>";
$title = $row['title'] ." by ". $row['author'];
do_html_URL($url,$title);
echo "</td></tr>";
}
echo "</table>";
}
echo "

";
}

PHP and MysqL Web Development的详细信息

代码实现：

PHP

rush:PHP;"> session_start();

$isbn = $_GET['isbn'];

$book = get_book_details($isbn);
do_html_header($book['title']);
display_book_details($book);

//设置继续按钮
$target = "index.php";
if($book['catid'])
$target = "show_cat.php?catid = ". $book['catid'];

//如果是管理员，显示编辑链接
if(check_admin_user())
{
display_button("edit_book_form.php?isbn=". $isbn,"edit-item","Edit Item");
display_button("admin.php","Admin Menu");
display_button($target,"Continue");
}
else
{
display_button("show_cart.php?new=". $isbn,"add-to-cart","Add". $book['title']." To My Shopping Cart");
display_button($target,"Continue Shopping");
}
do_html_footer();
?>

4.11 book_fns.PHP 文件中的函数get_book_details()

$conn = db_connect(); //连接数据库
$query = "select * from books where isbn = '". $isbn ."'";
$result = @$conn ->query($query);
if(!$result) //查询失败，原因为查询出错
return false;
$result = @$result ->fetch_assoc();
return $result;
}

4.12 output_fns.PHP 文件中的函数 display_book_details()

<div class="jb51code">
<pre class="brush:PHP;">
function display_book_details($book) //输出图书详细说明
{
if(is_array($book))
{
echo "<table><tr>";
// 如果图片存在
if(@file_exists("images/". $book['isbn'] .".jpg"))
{
$size = getimagesize("images/". $book['isbn'] .".jpg");
if(($size[0] > 0) && ($size[1] > 0))
{
echo "<td><img src=\"images/". $book['isbn'] .".jpg\" style=\"border: 1px solid black\"/></td>";
}
}
echo "<td>

Author:
";
echo $book['author'];
echo "
ISBN:
";
echo $book['isbn'];
echo "
Our Price:
";
echo number_format($book['price'],2);
echo "
Description:
";
echo $book['description'];
echo "

</td></tr></table>";
}
else
{
echo "

The details of this book cannot be displayed at this time.

";
}
echo "

";
}

5、实现购物车

不使用参数的脚本只显示购物车的内容

带有参数new的脚本将添加一个物品到购物车

代码实现： 5.1 show_cart.PHP

rush:PHP;"> /**

@author switch
@copyright 2015
显示用户购物车的内容。也用来向购物车添加图书
*/
//require_once语句和require语句完全相同,如果是则不会再次包含。
require_once('book_sc_fns.php');

session_start();

@$new = $_GET['new'];

if($new)
{
if(!isset($_SESSION['cart'])) //购物车中无物品
{
$_SESSION['cart'] =array();
$_SESSION['items'] = 0;
$_SESSION['total_price'] = '0.00';
}

if(isset($_SESSION['cart'][$new]))
{
$_SESSION['cart'][$new]++;
}
else
{
$_SESSION['cart'][$new] = 1;
}

$_SESSION['total_price'] = calculate_price($_SESSION['cart']);
$_SESSION['items'] = calculate_items($_SESSION['cart']);
}

if(isset($_POST['save']))
{
foreach($_SESSION['cart'] as $isbn => $qty)
{
if($_POST[$isbn] == '0')
unset($_SESSION['cart'][$isbn]);
else
$_SESSION['cart'][$isbn] = $_POST[$isbn];
}

$_SESSION['total_price'] = calculate_price($_SESSION['cart']);
$_SESSION['items'] = calculate_items($_SESSION['cart']);
}

do_html_header("Your shopping cart");

if((@$_SESSION['cart']) && (array_count_values($_SESSION['cart'])))
{
display_cart($_SESSION['cart']);
}
else
{
echo "

There are no items in your cart

";
}

$target = "index.PHP";

//如果只有一种物品添加到购物车，可以继续购物
if($new)
{
$details = get_book_details($new);
if($details['catid'])
{
$target = "show_cat.PHP?catid=". $details['catid'];
}
}

display_button($target,"Continue Shopping");

//SSL链接--需要配置，PS：没配置，所以不能使用
// $path = $_SERVER['PHP_SELF']; //获取路径
// $server = $_SERVER['SERVER_NAME']; //获取主机名
// $path = str_replace('show_cart.PHP','',$path);
// display_button("https://". $server . $path ."checkout.PHP","go-to-checkout","Go To Checkout");

//非SSL链接
 display_button("checkout.PHP","Go To Checkout");

do_html_footer();
?>

PHP文件中的函数 display_cart()

<div class="jb51code">
<pre class="brush:PHP;">
function display_cart($cart,$change = true,$images = 1) //显示购物车
{
echo "<table border=\"0\" width=\"100%\" cellspacing=\"0\">
<form action=\"show_cart.PHP\" method=\"post\">
<tr>
<th colspan=\"". (1 + $images) ."\" bgcolor=\" #cccccc\">Item
<th bgcolor=\"#cccccc\">Price
<th bgcolor=\"#cccccc\">Quantity
<th bgcolor=\"#cccccc\">Total
</tr>";
//输出购物车中每一项
foreach($cart as $isbn => $qty)
{
$book = get_book_details($isbn);
echo "<tr>";
if($images == true)
{
echo "<td align=\"left\">";
if(file_exists("images/". $isbn .".jpg"))
{
$size = getimagesize("images/". $isbn .".jpg");
if(($size[0] > 0) && ($size[1] > 1)) //图片长宽
{
echo "<img src=\"images/". $isbn .".jpg\"
style=\"border: 1px solid black\"
width=\"". ($size[0] / 3) ."\"
height=\"". ($size[1] / 3) ."\"/>";
}
}
else
echo " ";
echo "</td>";
}
echo "<td align=\"left\">
<a href=\"show_book.PHP?isbn=". $isbn ."\">". $book['title'] ." by". $book['author'] ."</td>
<td align=\"center\">\$". number_format($book['price'],2) ."</td><td align=\"center\">";

//如果允许更改数量
if ($change == true)
{
echo "<input type=\"text\" name=\"".$isbn."\" value=\"".$qty."\" size=\"3\">";
}
else
{
echo $qty;
}
echo "</td><td align=\"center\">\$".number_format($book['price']*$qty,2)."</td></tr>\n";
}

//总数
echo "<tr>
<th colspan=\"". (2 + $images) ."\" bgcolor = \"#cccccc\">
<th align = \"center\" bgcolor=\"#cccccc\">". $_SESSION['items'] ."
<th align = \"center\" bgcolor=\"#cccccc\">\$". number_format($_SESSION['total_price'],2) ."</tr>";

//保存按钮
if($change == true)
{
echo "<tr>
<td colspan = \"". (2 + $images) ."\"> </td>
<td align = \"center \">
<input type=\"hidden\" name=\"save\"value=\"true\" />
<input type = \"image\" src = \"images/save-changes.gif\" border = \" 0 \" alt = \" Save Changes \" />
</td>
<td> </td>
</tr>";
}
echo "</table>";
}

5.3 book_fns.PHP 文件中的函数calculate_price()

$qty) { $query = "select price from books where isbn ='". $isbn ."'"; $result = $conn ->query($query); if($result) { $item = $result ->fetch_object(); $item_price = $item ->price; $price += $item_price * $qty; } } } return $price; }

5.4 book_fns.PHP 文件中的函数calculate_items()

$qty) $items += $qty; } return $items; }

获取顾客的详细信息

由以下代码实现： 5.5 checkout.PHP

rush:PHP;"> PHP

/**

@author switch
向用户显示所有的订单细节。获取商品运送细节
*/
//require_once语句和require语句完全相同,如果是则不会再次包含。
require_once('book_sc_fns.PHP');

session_start();

do_html_header("Checkout");

if((@$_SESSION['cart']) && (array_count_values($_SESSION['cart'])))
{
display_cart($_SESSION['cart'],false,0);
display_checkout_form();
}
else
{
echo "

Thers are no items in your cart

";
}

display_button("show_cart.PHP","Continue Shopping");

do_html_footer();
?>

5.6 output_fns.PHP 文件中的display_checkout_form()

PHP" method="post">
</tr>
<tr>
<td>Name</td>
<td><input type="text" name="ship_name" maxlength=""/></td>
</tr>
<tr>
<td>Address</td>
<td><input type="text" name="ship_address" value="" maxlength="40" size="40"/></td>
</tr>
<tr>
<td>City/Suburb</td>
<td><input type="text" name="ship_city" value="" maxlength="20" size="40"/></td>
</tr>
<tr>
<td>State/Province</td>
<td><input type="text" name="ship_state" value="" maxlength="20" size="40"/></td>
</tr>
<tr>
<td>Postal Code or Zip Code</td>
<td><input type="text" name="ship_zip" value="" maxlength="10" size="40"/></td>
</tr>
<tr>
<td>Country</td>
<td><input type="text" name="ship_country" value="" maxlength="20" size="40"/></td>
</tr>
<tr>
<td colspan="2" align="center">

Please press Purchase to confirm your purchase,or Continue Shopping to add or remove items.

PHP }

已填写好信息的订单

获取客户信用卡信息

代码实现： 5.7 purchase.PHP

rush:PHP;"> PHP

/**

@author switch
从用户获取付款细节
*/
//require_once语句和require语句完全相同,如果是则不会再次包含。
require_once('book_sc_fns.PHP');

session_start();

do_html_header("Checkout");

//创建变量
$name = $_POST['name'];
$address = $_POST['address'];
$city = $_POST['city'];
$zip = $_POST['zip'];
$country = $_POST['country'];

//如果订单细节填满
if(($_SESSION['cart']) && ($name) && ($address) && ($city) && ($zip) && ($country))
{
if(insert_order($_POST) != false)
{
display_cart($_SESSION['cart'],0);

display_shipping(calculate_shipping_cost());

display_card_form($name);

display_button("show_cart.PHP","Continue Shopping");
}
else
{
echo "

Could not store data,please try again.

";
display_button('checkout.PHP','back','Back');
}
}
else
{
echo "

You did not fill in all the fields,please try again.

";
display_button('checkout.PHP','Back');
}
do_html_footer();
?>

5.8 order_fns.PHP 文件中的函数insert_order()

<div class="jb51code">
<pre class="brush:php;">
function insert_order($order_details) //提取订单细节作为变量
{
extract($order_details);

//设置邮寄地址为当前地址
if((!$ship_name) && (!$ship_address) && (!$ship_city) && (!$ship_state) && (!$ship_zip) &&(!$ship_country))
{
$ship_name = $name;
$ship_address = $address;
$ship_city = $city;
$ship_state = $state;
$ship_zip = $zip;
$ship_country = $country;
}

//连接数据库
$conn = db_connect();

//事务开始，必须关闭自动提交
$conn ->autocommit(false);

$query = "select customrid from customers where
name ='". $name ."' and address = '". $address ."'
and city = '". $city ."' and state = '". $state ."'
and zip = '". $zip ."' and country = '". $country ."'";

$result = $conn ->query($query);

if(@$result ->num_rows > 0)
{
$customer = $result ->fetch_object();
$customerid = $customer ->customerid;
}
else
{
$query = "insert into customers values
('','". $name ."','". $address ."','". $city ."','". $state ."','". $zip ."','". $country ."')";
$result = $conn ->query($query);

if(!$result)
return false;
}

$customerid = $conn ->insert_id; //返回上次查询中自增量的ID

$date = date("Y-m-d");

$query ="insert into orders values
('','". $customerid ."','". $_SESSION['total_price'] ."','". $date ."','PARTIAL','". $ship_name ."','". $ship_address ."','". $ship_city ."','". $ship_state ."','". $ship_zip ."','". $ship_country ."')";

$result = $conn ->query($query);
if(!$result)
return false;

$query = "select orderid from orders where
customerid ='". $customerid ."' and
amount > (". $_SESSION['total_price'] ."-.001) and
amount < (". $_SESSION['total_price'] ."+.001) and
date ='". $date ."' and
order_status = 'PARTIAL' and
ship_name ='". $ship_name ."' and
ship_address ='". $ship_address ."' and
ship_city ='". $ship_city ."' and
ship_state ='". $ship_state ."' and
ship_zip ='". $ship_zip ."' and
ship_country ='". $ship_country ."'";

$result = $conn ->query($query);

if($result ->num_rows > 0)
{
$order = $result ->fetch_object();
$orderid = $order ->orderid;
}
else
return false;

foreach($_SESSION['cart'] as $isbn => $quantity)
{
$detail = get_book_details($isbn);
$query = "delete from order_items where
orderid = '". $orderid ."' and isbn = '". $isbn ."'";
$result = $conn ->query($query);

$query = "insert into order_items values
('". $orderid ."','". $isbn ."',". $detail['price'] .",$quantity)";
$result = $conn ->query($query);
if(!$result)
return false;
}

//事务关闭，开启自动提交
$conn ->commit();
$conn ->autocommit(true);

return $orderid;
}

5.9 output_fns.PHP 文件中的函数 display_shipping()