只作为了解购物车入门，可以参考ci框架的的购物车类。也是引用了其他一位博主的文章，链接忘了。。

sql文件 库名shop

/*
Navicat MySQL Data TransferSource Server         : localhost_3306
Source Server Version : 50540
Source Host           : localhost:3306
Source Database       : shopTarget Server Type    : MYSQL
Target Server Version : 50540
File Encoding         : 65001Date: 2015-06-11 14:17:36
*/SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `product`
-- ----------------------------
DROP TABLE IF EXISTS `product`;
CREATE TABLE `product` (`pid` int(11) NOT NULL AUTO_INCREMENT,`pname` varchar(255) DEFAULT NULL,`pimg` varchar(255) DEFAULT NULL,`price` varchar(255) DEFAULT NULL,PRIMARY KEY (`pid`)
) ENGINE=MyISAM AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;-- ----------------------------
-- Records of product
-- ----------------------------
INSERT INTO product VALUES ('1', 'ipad', 'http://a.com/error.png', '12');
INSERT INTO product VALUES ('2', 'air', 'http://a.com/error.png', '13');
INSERT INTO product VALUES ('3', 'pro', 'http://a.com/error.png', '14');
INSERT INTO product VALUES ('4', 'shuffle', 'http://a.com/error.png', '15');

我自己配置的vhost a.com。可以直接在主目录下添加一个图片即可。也可以直接无视图片。

一共是coon.php,index.php,buy.php,delete.php,car.php

*coon

<?php$conn=mysql_connect("localhost","root","root");mysql_select_db("shop",$conn);mysql_query("set names utf8");
?>

*index.php

<?php
include ("coon.php");
error_reporting(0);
$sql="select * from product";//查询所有商品
$rs=mysql_query($sql,$conn);//执行sql语句，得到一个结果集
while($row=mysql_fetch_array($rs))//遍历结果集
{
?>
<table width="343" height="152" border="1"><tr><td width="124"rowspan="3"><img src="<?php echo $row["pimg"]?>" width="123" height="121" border="0"/></td><td width="203"height="35">货物名称：<?php echo$row["pname"]?></td></tr><tr><tdheight="28">货物价格：<?php echo $row["price"]?></td></tr><tr><td height="27"align="center"><a href="buy.php?id=<?php echo $row["pid"]?>&pname=<?phpecho $row["pname"]?>">购买</a></td></tr> </table>
<?php
}
?>

*buy.php

<?phpsession_start();ob_start();$pid=$_GET['id'];$name=$_GET['pname'];$arr=$_SESSION['mycar'];if(is_array($arr)){if(array_key_exists($pid,$arr)){//  买过此商品，数量加1，返回给购物车数组$goods=$arr[$pid];$goods['num']+=1;$arr[$pid]=$goods;	}else{$arr[$pid]=array('pid'=>$pid,'name'=>$name,'num'=>'1');}}else{$arr[$pid]=array('pid'=>$pid,'name'=>$name,'num'=>'1');}$_SESSION['mycar']=$arr;// session_destroy();ob_clean();header('location:car.php');

*delete.php

<?phpsession_start();ob_start();$pid=$_GET['id'];$arr=$_SESSION['mycar'];foreach ($arr as $key => $value) {if($key==$pid){unset($arr[$key]);}}$_SESSION['mycar']=$arr;ob_clean();header('location:car.php');

*car.php

<?phpsession_start();$arr=$_SESSION['mycar'];if(count($arr)>0){?><table width="600" height="37"border="1"><tr><tdwidth="96">商品ID</td><tdwidth="158">商品名称</td><tdwidth="154">商品数量</td><tdwidth="177">删除</td></tr>
<?php
foreach($arr as $a)//遍历这个二维数组
{
?><tr><td width="96"><?php echo $a["pid"]?></td><td width="158"><?php echo $a["name"]?></td><td width="154"><?php echo $a["num"]?></td><td width="177"><a href="delete.php?id=<?php echo $a['pid']?>">删除</a></td>
</tr>
<?php
}
?>
</table>
</form>
<a href="index.php">返回继续购物</a><?php
}else{echo 'empty car '.'<a href="index.php"> 去购物</a>';
}
?>