设计模式（工厂方法）

 1 <?php
 2 /**
 3  * 工厂模式
 4  */
 5 
 6 
 7 
 8 /**
 9  * 抽象产品
10  */
11 abstract class food {
12     private $_name ;
13     
14     abstract public function make();
15 }
16 
17 /**
18  * 实体产品
19  */
20 class greens extends food {
21     public function make() {
22         echo ‘我要做greens‘;
23     }
24 }
25 class bread extends food {
26     public function make() {
27         echo ‘我要做bread‘;
28     }
29 }
30 
31 /**
32  * 抽象工厂
33  */
34 abstract class servant {
35     abstract public function createFood();
36 }
37 
38 /**
39  * 实体工场
40  */
41 class greensFactory extends servant{
42     public function createFood() {
43         return new greens();
44     }
45 }
46 
47 class breadFactory extends servant{
48     public function createFood () {
49         return new bread();
50     }
51 }