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php购物车实现代码

WBOYOriginal: 2016-05-25 16:38:464420browse

关于购物车,这个是在电子商务方面使用的比较多,用户选择好自己的商品需要保存起来,最后去收银台,这很像我们实际生活的超市,所以我现来写一个简单的php购物车实例代码,比较详细只要一步步,处理好就OK了.

购物车会用到php文件:

main.php 显示商品

additem.php把商品加入购物车

cearcart.php删除购物车中的商品

shoppingcart.php 操作类

用户的数据库代码如下:

inventory 
  create table inventory (  
    product tinytext not null,  
    quantity tinytext not null,  
    id int(4) default &#39;0&#39; not null auto_increment,  
    description tinytext not null,  
    price float(10,2) default &#39;0.00&#39; not null,  
    category char(1) default &#39;&#39; not null,  
    key id (id),  
    primary key (id),  
    key price (price)  
); 
insert into inventory values (&#39;硬盘&#39;,&#39;5&#39;,&#39;1&#39;,&#39;80g&#39;,&#39;5600&#39;,&#39;1&#39;); 
insert into inventory values (&#39;cpu&#39;,&#39;12&#39;,&#39;2&#39;,&#39;p4-2.4g&#39;,&#39;6600&#39;,&#39;1&#39;); 
insert into inventory values (&#39;dvd-rom&#39;,&#39;7&#39;,&#39;3&#39;,&#39;12x&#39;,&#39;2000&#39;,&#39;1&#39;); 
insert into inventory values (&#39;主板www.111cn.net&#39;,&#39;3&#39;,&#39;4&#39;,&#39;asus&#39;,&#39;5000&#39;,&#39;2&#39;); 
insert into inventory values (&#39;显示卡&#39;,&#39;6&#39;,&#39;5&#39;,&#39;64m&#39;,&#39;4500&#39;,&#39;1&#39;); 
insert into inventory values (&#39;刻录机&#39;,&#39;4&#39;,&#39;6&#39;,&#39;52w&#39;,&#39;3000&#39;,&#39;1&#39;); 
shopping 
create table shopping (  
session tinytext not null,  
product tinytext not null,  
quantity tinytext not null,  
card tinytext not null,  
id int(4) default &#39;0&#39; not null auto_increment,  
key id (id),  
primary key (id)  
);  
shopper 
create database shopper; 
use shopper; 
create table shopping (  
session tinytext not null,  
product tinytext not null,  
quantity tinytext not null,  
card tinytext not null,  
id int(4) default &#39;0&#39; not null auto_increment,  
key id (id),  
primary key (id)  
);  
create table inventory (  
product tinytext not null,  
quantity tinytext not null,  
id int(4) default &#39;0&#39; not null auto_increment,  
description tinytext not null,  
price float(10,2) default &#39;0.00&#39; not null,  
category char(1) default &#39;&#39; not null,  
key id (id),  
primary key (id),  
key price (price)  
); 
insert into inventory values (&#39;硬盘&#39;,&#39;5&#39;,&#39;1&#39;,&#39;80g&#39;,&#39;5600&#39;,&#39;1&#39;); 
insert into inventory values (&#39;cpu&#39;,&#39;12&#39;,&#39;2&#39;,&#39;p4-2.4g&#39;,&#39;6600&#39;,&#39;1&#39;); 
insert into inventory values (&#39;dvd-rom&#39;,&#39;7&#39;,&#39;3&#39;,&#39;12x&#39;,&#39;2000&#39;,&#39;1&#39;); 
insert into inventory values (&#39;主板111cn.net&#39;,&#39;3&#39;,&#39;4&#39;,&#39;asus&#39;,&#39;5000&#39;,&#39;2&#39;); 
insert into inventory values (&#39;显示卡&#39;,&#39;6&#39;,&#39;5&#39;,&#39;64m&#39;,&#39;4500&#39;,&#39;1&#39;); 
insert into inventory values (&#39;刻录机&#39;,&#39;4&#39;,&#39;6&#39;,&#39;52w&#39;,&#39;3000&#39;,&#39;1&#39;);

main.php 显示购物车所有商品,代码如下:

include("shoppingcart.php");  
$cart = new cart; 
$table="shopping"; 
/* 查询并显示所有存货表中的信息 */ 
$query = "select * from inventory"; 
$invresult = mysql教程_query($query);  
if (!($invresult)) {  
   echo "查询失败<br>"; 
   exit; 
}  
echo "以下产品可供订购∶"; 
echo "<table border=0>"; 
echo "<tr><td bgcolor=#aaccff>产品编号</td><td bgcolor=#aaccff>产品名称</td><td bgcolor=#aaccff>单价</td>"; 
echo "<td bgcolor=#aaccff>剩余数量</td><td bgcolor=#aaccff>产品描述</td><td bgcolor=#aaccff>放入购物车</td></tr>"; 
while($row_inventory = mysql_fetch_object($invresult)) { 
echo "<tr><td bgcolor=#aaccff>".$row_inventory->id."</td>";  
echo "<td bgcolor=#aaccff>".$row_inventory->product."</td>";  
echo "<td bgcolor=#aaccff>".$row_inventory->price."</td>";  
echo "<td bgcolor=#aaccff>".$row_inventory->quantity."</td>";  
echo "<td bgcolor=#aaccff>".$row_inventory->description."</td>"; 
echo "<td bgcolor=#aaccff><a href=&#39;additem.php?product=".$row_inventory->product."&#39;><img  border=&#39;0&#39; src=&#39;cart.gif&#39;    style="max-width:90%"php购物车实现代码 " ></a></td></tr>"; //开源代码phprm.com 
} 
echo "</table>"; 
echo "<br>购物车中产品的数量∶".$cart->quant_items($table, $session); 
echo "<br><br><a href=&#39;clearcart.php&#39;><img  border=&#39;0&#39; src=&#39;car.gif&#39; alt="php购物车实现代码 " ></a>清空购物车"; 
additem.php代码,增加商品代码:
include("shoppingcart.php"); 
$cart = new cart; 
$table="shopping"; 
echo "你的购物清单∶<br>"; 
$cart->add_item($table,$session,$product,&#39;1&#39;); 
$cart->display_contents($table, $session); 
echo "<br>你的购物总金额∶".$cart->cart_total($table, $session); 
echo "<br><form action=&#39;main.php&#39;>"; 
echo "<input type=submit value=&#39;继续购物&#39;>"; 
echo "</form>"; 
//clearcart.php删除商品，清除购物车代码 
include("shoppingcart.php"); 
$cart = new cart; 
$table="shopping"; 
$cart->clear_cart($table, $session); 
echo "购物车中产品的数量∶".$cart->num_items($table, $session); 
echo "<form action=&#39;main.php&#39;>"; 
echo "<input type=submit value=&#39;继续购物&#39;>"; 
echo "</form>"; 
shoppingcart.php类,代码如下:
<?php
if (!$session && !$s) {  
    $s = md5(uniqid(rand()));  
    setcookie("session", "$s", time() + 14400);  
} 
/* 检查是否有 seesion, 如果没有产生一个 md5 的唯一 id, 并利用 cookie 存入 $s 中。 
并且设置其存在时间为 14400 sec 也就是 4 小时 */ 
$mysql_link = mysql_connect("127.0.0.1", "root", "test");  
if (!($mysql_link)) {
   echo "连接数据库失败<br>"; 
   exit;
}
$mysql_select=mysql_select_db("shopper", $mysql_link); 
if (!($mysql_select)) {  
   echo "打开数据库失败<br>"; 
   exit; 
}
/* 购物车 class */ 
class cart {
    function check_item($table, $session, $product) {  
        $query = "select * from $table where session=&#39;$session&#39; and product=&#39;$product&#39; ";  
        $result = mysql_query($query);  
          
        if(!$result) {  
            return 0;  
        }  
        $numrows = mysql_num_rows($result);  
        if($numrows == 0) {  
            return 0;  
        } else {  
            $row = mysql_fetch_object($result);  
            return $row->quantity;  
        }  
    } 
    function add_item($table, $session, $product, $quantity) {  
        $qty = $this->check_item($table, $session, $product);  
        if($qty == 0) {  
            $query = "insert into $table (session, product, quantity) values ";  
            $query .= "(&#39;$session&#39;, &#39;$product&#39;, &#39;$quantity&#39;) ";  
            mysql_query($query);  
        } else {  
            $quantity += $qty;  
            $query = "update $table set quantity=&#39;$quantity&#39; where session=&#39;$session&#39; and ";  
            $query .= "product=&#39;$product&#39; ";  
            mysql_query($query); 
        }  
    }  
      
    function delete_item($table, $session, $product) {  
        $query = "delete from $table where session=&#39;$session&#39; and product=&#39;$product&#39; ";  
        mysql_query($query);  
    }  
      
    function modify_quantity($table, $session, $product, $quantity) {  
        $query = "update $table set quantity=&#39;$quantity&#39; where session=&#39;$session&#39; ";  
        $query .= "and product=&#39;$product&#39; ";  
        mysql_query($query);  
    }  
      
    function clear_cart($table, $session) {  
        $query = "delete from $table where session=&#39;$session&#39; ";  
        mysql_query($query);  
    }  
      
    function cart_total($table, $session) {  
        $query = "select * from $table where session=&#39;$session&#39; ";  
        $result = mysql_query($query);  
        if(mysql_num_rows($result) > 0) {  
            while($row = mysql_fetch_object($result)) {  
                $query = "select price from inventory where product=&#39;$row->product&#39; ";  
                $invresult = mysql_query($query);  
                $row_price = mysql_fetch_object($invresult);  
                $total += ($row_price->price * $row->quantity);  
            }  
        }  
        return $total;  
    }  
      
    function display_contents($table, $session) {  
        $count = 0;  
        $query = "select * from $table where session=&#39;$session&#39; order by id ";  
        $result = mysql_query($query);  
        echo "<table border=0>"; 
        echo "<tr><td bgcolor=#aaccff>产品编号</td><td bgcolor=#aaccff>产品名称</td><td bgcolor=#aaccff>单价</td>"; 
        echo "<td bgcolor=#aaccff>购买数量</td><td bgcolor=#aaccff>单项小计</td><td bgcolor=#aaccff>产品描述</td></tr>"; 
        while($row = mysql_fetch_object($result)) {  
            $query = "select * from inventory where product=&#39;$row->product&#39; ";  
            $result_inv = mysql_query($query);  
            $row_inventory = mysql_fetch_object($result_inv);  
            $contents["product"][$count] = $row_inventory->product;  
            $contents["price"][$count] = $row_inventory->price;  
            $contents["quantity"][$count] = $row->quantity;  
            $contents["total"][$count] = ($row_inventory->price * $row->quantity);  
            $contents["description"][$count] = $row_inventory->description; 
           
            echo "<tr><td bgcolor=#aaccff>".$row_inventory->id."</td>";  
            echo "<td bgcolor=#aaccff>".$row_inventory->product."</td>";  
            echo "<td bgcolor=#aaccff>".$row_inventory->price."</td>";  
            echo "<td bgcolor=#aaccff>".$row->quantity."</td>";  
            echo "<td bgcolor=#aaccff>".$contents["total"][$count]."</td>";  
            echo "<td bgcolor=#aaccff>".$row_inventory->description."</td></tr>"; 
            $count++;  
        }  
echo "</table>"; 
        $total = $this->cart_total($table, $session);  
        $contents["final"] = $total;  
        return $contents;  
    }  
      
    function num_items($table, $session) {  
        $query = "select * from $table where session=&#39;$session&#39; ";  
        $result = mysql_query($query);  
        $num_rows = mysql_num_rows($result);  
        return $num_rows;  
    }  
      
    function quant_items($table, $session) {  
        $quant = 0;  
        $query = "select * from $table where session=&#39;$session&#39; ";  
        $result = mysql_query($query);  
        while($row = mysql_fetch_object($result)) {  
            $quant += $row->quantity;  
        }  
        return $quant;  
    }
}

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