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3种设计模式的简单如何实现

发布时间：2024-03-21 05:10:40 来源：网络

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1

 1 <?php
 2 //创建单例
 3 class Single{
 4     public $hash;
 5     static protected $ins=null;
 6     final protected function __construct(){
 7         $this->hash=rand(1,9999);
 8     }
 9 
10     static public function getInstance(){
11         if (self::$ins instanceof self) {
12             return self::$ins;
13         }
14         self::$ins=new self();
15         return self::$ins;
16     }
17 }
18 
19 //工厂模式
20 class RandFactory{
21     public static function factory(){
22         return Single::getInstance();
23     }
24 }
25 
26 //注册树
27 class Register{
28     protected static $objects;
29     public static function set($alias,$object){
30         self::$objects[$alias]=$object;
31     }
32     public static function get($alias){
33         return self::$objects[$alias];
34     }
35     public static function _unset($alias){
36         unset(self::$objects[$alias]);
37     }
38 }
39 
40 Register::set('rand',RandFactory::factory());
41 
42 $object=Register::get('rand');
43 
44 print_r($object);