PHP 写的一个购物车

在例子中，创建两个类,一个是通用的Product类,它封装了一个产品和产品的属性，别一个是购物车的Cart类　

Product类(Product.php)

01	class Product{

02	protected $_partNumber,$_description,$_price;

03

04	public function __construct($parNumber,$description,$price){

05	$this->_partNumber=$parNumber;

06	$this->_description=$description;

07	$this->_price=$price;

08

09

}

10

11	public function getPartNumber(){

12	return $this->_partNumber;

13

}

14

15	public function getDescription(){

16	return $this->_description;

17

}

18

19	public function getPrice(){

20	return $this->_price;

21

}

22

}

 

Cart对象(Cart.php)

01	require_once ('Product.php');

02

03	class Cart extends ArrayObject{

04

05	protected $_products;

06

07	public function __construct(){

08	$this->_products=array();

09	parent::__construct($this->_products);

10

}

11

12	public function getCarTotal(){

13

for(

14	$i=$sum=0,$cnt=count($this);

15

$i<$cnt;

16	$sum+=$this[$i++]->getPrice()

17

);

18	return $sum;

19

}

20

21

}

 

调用方法,

1	$cart=new Cart();

2	$cart[]=new Product('00231-A','Description',1.99);

3	$cart[]=new Product('00231-B','B',1.99);

4	echo $cart->getCarTotal();

 

getCarTotal可以统计总价

得值

3.98

 

转自:http://www.cnblogs.com/ScriptZhang/archive/2010/05/26/1743884.html