php设计模式 Proxy (代理模式)

复制代码 代码如下:

/**
* 代理模式
*
* 为其他对象提供一个代理以控制这个对象的访问
*
*/
interface Proxy
{
public function request();
public function display();
}

class RealSubject
{
public function request()
{
echo "RealSubject request
";
}

public function display()
{
echo "RealSubject display
";
}
}

class ProxySubject
{
private $_subject = null;
public function __construct()
{
$this->_subject = new RealSubject();
}

public function request()
{
$this->_subject->request();
}

public function display()
{
$this->_subject->display();
}
}

$objProxy = new ProxySubject();
$objProxy->request();
$objProxy->display();