phpエージェントモード

<?php
header("content-type:text/html;charset=utf-8");
// ==================php        =============================
interface Proxy{ 
    public function request(); 
    public function display(); 
} 

class RealSubject{ 
    public function request(){ 
        echo "RealSubject request<br/>"; 
    } 
    public function display(){ 
        echo "RealSubject display<br/>"; 
    } 
} 

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();