设计模式之代理模式--PHP

 1 <?php
 2 /**
 3  * @desc 代理模式
 4  * Created by PhpStorm.
 5  * User: zzq
 6  * Date: 2019-02-13
 7  * Time: 15:01
 8  */
 9 
10 //定义RealSubject 和 Proxy 共同具备的东西
11 interface Subject{
12     function say();
13     function run();
14 }
15 //代理类
16 class Proxy implements Subject{
17     private $realSubject = null;
18     public function __construct(RealObject $realObject = null){
19         if ( empty($realObject) ) {
20             $this->realSubject = new RealObject();
21         } else {
22             $this->realSubject = $realObject;
23         }
24     }
25 
26     function say(){
27         $this->realSubject->say();
28     }
29 
30     function run(){
31         $this->realSubject->run();
32     }
33 }
34 //真正的实体对象方法
35 class RealObject implements Subject{
36     private $name;
37     public function __construct($name){
38         $this->name = $name;
39     }
40 
41     function say(){
42         echo $this->name."说：我饿了";
43         echo PHP_EOL;
44     }
45 
46     function run(){
47         echo $this->name."吃饱了，去跑步";
48         echo PHP_EOL;
49     }
50 }
51 
52 $subject = new RealObject("李四");
53 $proxy = new Proxy($subject);
54 $proxy->say();
55 $proxy->run();

1 李四说：我饿了
2 李四吃饱了，去跑步