php购物车实现代码
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 '0' not null auto_increment,
description tinytext not null,
price float(10,2) default '0.00' not null,
category char(1) default '' not null,
key id (id),
primary key (id),
key price (price)
);
insert into inventory values ('硬盘','5','1','80g','5600','1');
insert into inventory values ('cpu','12','2','p4-2.4g','6600','1');
insert into inventory values ('dvd-rom','7','3','12x','2000','1');
insert into inventory values ('主板www.111cn.net','3','4','asus','5000','2');
insert into inventory values ('显示卡','6','5','64m','4500','1');
insert into inventory values ('刻录机','4','6','52w','3000','1');
shopping
create table shopping (
session tinytext not null,
product tinytext not null,
quantity tinytext not null,
card tinytext not null,
id int(4) default '0' 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 '0' 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 '0' not null auto_increment,
description tinytext not null,
price float(10,2) default '0.00' not null,
category char(1) default '' not null,
key id (id),
primary key (id),
key price (price)
);
insert into inventory values ('硬盘','5','1','80g','5600','1');
insert into inventory values ('cpu','12','2','p4-2.4g','6600','1');
insert into inventory values ('dvd-rom','7','3','12x','2000','1');
insert into inventory values ('主板111cn.net','3','4','asus','5000','2');
insert into inventory values ('显示卡','6','5','64m','4500','1');
insert into inventory values ('刻录机','4','6','52w','3000','1');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='additem.php?product=".$row_inventory->product."'><img border='0' src='cart.gif' width='81' height='17'></a></td></tr>"; //开源代码phprm.com
}
echo "</table>";
echo "<br>购物车中产品的数量∶".$cart->quant_items($table, $session);
echo "<br><br><a href='clearcart.php'><img border='0' src='car.gif'></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,'1');
$cart->display_contents($table, $session);
echo "<br>你的购物总金额∶".$cart->cart_total($table, $session);
echo "<br><form action='main.php'>";
echo "<input type=submit value='继续购物'>";
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, $session);
echo "<form action='main.php'>";
echo "<input type=submit value='继续购物'>";
echo "</form>";
shoppingcart.php类,代码如下:
<?php
if (!$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 $table where session='$session' and product='$product' ";
$result = mysql_query($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 ";
$query .= "('$session', '$product', '$quantity') ";
mysql_query($query);
} else {
$quantity += $qty;
$query = "update $table set quantity='$quantity' where session='$session' and ";
$query .= "product='$product' ";
mysql_query($query);
}
}
function delete_item($table, $session, $product) {
$query = "delete from $table where session='$session' and product='$product' ";
mysql_query($query);
}
function modify_quantity($table, $session, $product, $quantity) {
$query = "update $table set quantity='$quantity' where session='$session' ";
$query .= "and product='$product' ";
mysql_query($query);
}
function clear_cart($table, $session) {
$query = "delete from $table where session='$session' ";
mysql_query($query);
}
function cart_total($table, $session) {
$query = "select * from $table where session='$session' ";
$result = mysql_query($query);
if(mysql_num_rows($result) > 0) {
while($row = mysql_fetch_object($result)) {
$query = "select price from inventory where product='$row->product' ";
$invresult = mysql_query($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 $table where session='$session' 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)) {
$query = "select * from inventory where product='$row->product' ";
$result_inv = mysql_query($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 $table where session='$session' ";
$result = mysql_query($query);
$num_rows = mysql_num_rows($result);
return $num_rows;
}
function quant_items($table, $session) {
$quant = 0;
$query = "select * from $table where session='$session' ";
$result = mysql_query($query);
while($row = mysql_fetch_object($result)) {
$quant += $row->quantity;
}
return $quant;
}
}文章链接：http://www.phprm.com/develop/fs5123.html
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