实用的php教程购物车程序
以前有用过一个感觉不错,不过看了这个感觉也很好,所以介绍给需要的朋友参考一下。
//调用实例
require_once 'cart.class.php';
session_start();
if(!isset($_SESSION['cart'])) {
$_SESSION['cart'] = new Cart;
}
$cart =& $_SESSION['cart'];if( ($_SERVER['REQUEST_METHOD']=="POST")&&($_POST['action']=='add') ){
$p = $_POST['p'];
$items = $cart->add($p);
}
if( ($_GET['action']=='remove')&&($_GET['key']!="") ) {
$items = $cart->remove($_GET['key']);
}if( ($_SERVER['REQUEST_METHOD']=="POST")&&($_POST['action']=='modi') ){
$key = $_POST['key'];
$value = $_POST['value'];
for($i=0;$i$items = $cart->modi($key[$i],$value[$i]);
}
}$items = $cart->getCart();
//打印
echo "";
";
setlocale(LC_MONETARY, 'it_IT');
foreach($items as $item){
echo "
?>
/**
* Cart
*
* 购物车类
*
* @author doodoo
* @package Cart
* @category Cart
* @license PHP License
* @access public
* @version $Revision: 1.10 $
*/
Class Cart{var $cart;
var $totalCount; //商品总数量
var $totalPrices; //商品总金额/**
* Cart Constructor
*
* 类的构造函数,使购物车保持稳定的初始化状态
*
* @static
* @access public
* @return void 无返回值
* @param void 无参数
*/
function Cart(){
$this->totalCount = 0;
$this->totalPrice = 0;
$this->cart = array();
}
// }}}
// {{{ add($item)/**
* 增加商品到当前购物车
*
* @access public
* @param array $item 商品信息(一维数组:array(商品ID,商品名称,商品单价,商品数量))
* @return array 返回当前购物车内商品的数组
*/
function add($item){
if(!is_array($item)||is_null($item)) return $this->cart;
if(!is_numeric(end($item))||(!is_numeric(prev($item)))) {
echo "价格和数量必须是数字";
return $this->cart;
}
reset($item); //这一句是必须的,因为上面的判断已经移动了数组的指标
$key = current($item);
if($key=="") return $this->cart;
if($this->_isExists($key)){ //商品是否已经存在?
$this->cart[$key]['count'] = end($item);
return $this->cart;
}$this->cart[$key]['ID'] = $key;
$this->cart[$key]['name'] = next($item);
$this->cart[$key]['price'] = next($item);
$this->cart[$key]['count'] = next($item);return $this->cart;
}// }}}
// {{{ add($item)/**
* 从当前购物车中取出部分或全部商品
* 当 $key=="" 的时候,清空当前购物车
* 当 $key!=""&&$count=="" 的时候,从当前购物车中拣出商品ID号为 $key 的全部商品
* 当 $key!=""&&$count!="" 的时候,从当前购物车中拣出 $count个 商品ID号为 $key 的商品
*
* @access public
* @param string $key 商品ID
* @return mixed 返回真假或当前购物车内商品的数组
*/
function remove($key="",$count=""){
if($key=="") {
$this->cart = array();
return true;
}
if(!array_key_exists($key,$this->cart)) return false;
if($count==""){ //移去这一类商品
unset($this->cart[$key]);
}else{ //移去$count个商品
$this->cart[$key]['count'] -= $count;
if($this->cart[$key]['count']cart[$key]);
}
return $this->cart;
}// }}}
// {{{ modi($key,$value)/**
* 修改购物车内商品ID为 $key 的商品的数量为 $value
*
* @access public
* @param string $key 商品ID
* @param int $value 商品数量
* @return array 返回当前购物车内商品的数组;
*/
function modi($key,$value){
if(!$this->_isExists($key)) return $this->cart(); //不存在此商品,直接返回
if($value unset($this->cart[$key]);
return $this->cart;
}
$this->cart[$key]['count'] = $value;
return $this->cart;
}
/**
* 返回当前购物车内商品的数组
*
* @access public
* @return array 返回当前购物车内商品的数组;
*/
function getCart(){
return $this->cart;
}// }}}
// {{{ _isExists($key)/**
* 判断当前购物车中是否存在商品ID号为$key的商品
*
* @access private
* @param string $key 商品ID
* @return bool true or false;
*/
function _isExists($key)
{
if(isset($this->cart[$key])&&!empty($this->cart[$key])&&array_key_exists($key,$this->cart))
return true;
return false;
}// }}}
// {{{ isEmpty()/**
* 判断当前购物车是否为空,即没有任何商品
*
* @access public
* @return bool true or false;
*/
function isEmpty(){
return !count($this->cart);
}// }}}
// {{{ _stat()/**
* 取得部分统计信息
*
* @access private
* @return bool true or false;
*/
function _stat(){
if($this->isEmpty()) return false;
foreach($this->cart as $item){
$this->totalCount = @end($item);
$this->totalPrices = @prev($item);
}
return true;
}// }}}
// {{{ totalPrices()/**
* 取得当前购物车所有商品的总金额
*
* @access public
* @return float 返回金额;
*/
function totalPrices(){
if($this->_stat())
return $this->totalPrices;
return 0;
}// }}}
// {{{ isEmpty()/**
* 取得当前购物车所有商品的总数量和
*
* @access public
* @return int ;
*/
function totalCount(){
if($this->_stat())
return $this->totalCount;
return 0;
}
}//End Class Cart
?>

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