代理模式(Proxy Pattern)

最新推荐文章于 2025-06-16 00:03:38 发布

原创最新推荐文章于 2025-06-16 00:03:38 发布 · 376 阅读

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本文介绍如何使用PHP的代理模式设计一个红酒销售系统，包括基础类、接口、工厂类和代理类的实现，以及销售操作的具体实现。

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<?php
//代理模式
//基础类（get/set方法）
class CommonClass {
	public function __set($key, $value) {
		$this->$key = $value;
	}
	public function __get($key) {
		if(isset($this->$key)) {
			return $this->$key;
		} else {
			return NULL;
		}
	}
}

class RedWine extends CommonClass {
	public static $NO;
	function __construct() {
		self::$NO++;
	}
}

//卖的接口
interface ISellable {
	function sell($count);
}

class RedWineFactory extends CommonClass implements ISellable {
	public function sell($count) {
		$redWineList = array();
		for($i = 0; $i < $count; $i++) {
			array_push($redWineList, new RedWine());
		}
		return $redWineList;
	}
}

class RedWineProxy extends CommonClass implements ISellable {
	//一个RedWineFactory对象的引用
	private $redWineFactory;

	//销售总量
	public static $sellCount = 0;

	public function __construct(RedWineFactory $redWineFactory) {
		$this->redWineFactory = $redWineFactory;
	}

	public function sell($count) {
		if($this->checkUser()) {
			$redWine = $this->redWineFactory->sell($count);
			self::$sellCount += $count;
			return $redWine;
		} else {
			return NULL;
		}
	}

	protected function checkUser() {
		return true;
	}
}

$redWineFactory = new RedWineFactory();
$redWineProxy = new RedWineProxy($redWineFactory);
$redWineProxy->sell(3);
var_dump($redWineProxy);
echo RedWineProxy::$sellCount;
?>