PHP编程：浅析php创建者模式

<?php
/**
?* 创建者模式
?*/
//购物车
class ShoppingCart {
?????? //选中的商品
??? private $_goods = array();
??? //使用的优惠券
??? private $_tickets = array();
?????? public function addGoods($goods) {
????????????? $this->_goods[] = $goods;
?????? }
??? public function addTicket($ticket) {
?????????? $this->_tickets[] = $ticket;
??? }
??? public function printInfo() {
?????????? printf("goods:%s,tickets:%sn",implode(',',$this->_goods),$this->_tickets));
??? }
}
//假如我们要还原购物车的东西,好比用户关闭浏览器后再打开时会根据cookie还原
$data = array(
?????? 'goods' => array('衣服','鞋子'),
?????? 'tickets' => array('减10'),
);
//如果不使用创建者模式,则需要业务类里一步步还原购物车
// $cart = new ShoppingCart();
// foreach ($data['goods'] as $goods) {
//?? $cart->addGoods($goods);
// }
// foreach ($data['tickets'] as $ticket) {
//?? $cart->addTicket($ticket);
// }
// $cart->printInfo();
// exit;
//我们提供创建者类来封装购物车的数据组装
class CardBuilder {
?????? private $_card;
?????? function __construct($card) {
????????????? $this->_card = $card;
?????? }
?????? function build($data) {
????????????? foreach ($data['goods'] as $goods) {
???????????????????? $this->_card->addGoods($goods);
????????????? }
????????????? foreach ($data['tickets'] as $ticket) {
???????????????????? $this->_card->addTicket($ticket);
????????????? }
?????? }
?????? function getCrad() {
????????????? return $this->_card;
?????? }
}
$cart = new ShoppingCart();
$builder = new CardBuilder($cart);
$builder->build($data);
echo "after builder:n";
$cart->printInfo();
?>