PHP设计模式之工厂模式，代码练习

aboys

1. <?php
   
2. /**
   
3. * 工厂模式
   
4. */
   
5. 
   
6. /**
   
7.  * 比萨商店抽象类
   
8.  */
   
9. abstract class PizzaStore
   
10. {
    
11.     public abstract function createPizza($type);
    
12. 
    
13.     public function orderPizza($type)
    
14.     {
    
15.         $pizza = $this->createPizza($type);
    
16.         echo "食物名称：{$pizza->name}\n";
    
17.         echo "制作方法：{$pizza->make()}\n";
    
18.         echo "包装方式：{$pizza->box()}\n";
    
19.     }
    
20. }
    
21. 
    
22. /**
    
23.  * 美国风味比萨店
    
24.  * 有芝士、香肠两种口味
    
25.  */
    
26. class USAPizza extends PizzaStore
    
27. {
    
28.     public function createPizza($type)
    
29.     {
    
30.         if ($type == 'cheese') {
    
31.             return new CheesePizza();
    
32.         } elseif ($type == 'sausage') {
    
33.             return new SausagePizza();
    
34.         } else {
    
35.             return null;
    
36.         }
    
37.     }
    
38. }
    
39. 
    
40. /**
    
41.  * 中国风味比萨店
    
42.  * 有韭菜鸡蛋、西葫芦两种口味
    
43.  */
    
44. class CHINAPizza extends PizzaStore
    
45. {
    
46.     public function createPizza($type)
    
47.     {
    
48.         if ($type == 'egg') {
    
49.             return new EggPizza();
    
50.         } elseif ($type == 'xhl') {
    
51.             return new XhlPizza();
    
52.         } else {
    
53.             return null;
    
54.         }
    
55.     }
    
56. }
    
57. 
    
58. /**
    
59.  * 比萨抽象类
    
60.  */
    
61. abstract class Pizza
    
62. {
    
63.     public $name;
    
64. 
    
65.     public abstract function make();
    
66.     public abstract function box();
    
67. }
    
68. 
    
69. class CheesePizza extends Pizza
    
70. {
    
71.     public $name = '芝士口味的比萨';
    
72. 
    
73.     public function make()
    
74.     {
    
75.         return '面饼上面撒些芝士粉';
    
76.     }
    
77. 
    
78.     public function box()
    
79.     {
    
80.         return '装载四方的纸盒子里';
    
81.     }
    
82. }
    
83. 
    
84. class SausagePizza extends Pizza
    
85. {
    
86.     public $name = '香肠口味的比萨';
    
87. 
    
88.     public function make()
    
89.     {
    
90.         return '面饼上面撒些香肠薄片';
    
91.     }
    
92. 
    
93.     public function box()
    
94.     {
    
95.         return '装载四方的纸盒子里';
    
96.     }
    
97. }
    
98. 
    
99. class EggPizza extends Pizza
    
100. {
     
101.     public $name = '韭菜鸡蛋的馅饼';
     
102. 
     
103.     public function make()
     
104.     {
     
105.         return '面饼里面夹些韭菜鸡蛋';
     
106.     }
     
107. 
     
108.     public function box()
     
109.     {
     
110.         return '用纸袋子包装';
     
111.     }
     
112. }
     
113. 
     
114. class XhlPizza extends Pizza
     
115. {
     
116.     public $name = '西葫芦的馅饼';
     
117. 
     
118.     public function make()
     
119.     {
     
120.         return '面饼里面夹些西葫芦';
     
121.     }
     
122. 
     
123.     public function box()
     
124.     {
     
125.         return '用纸袋子包装';
     
126.     }
     
127. }
     
128. 
     
129. // example
     
130. // 购买一个芝士比萨
     
131. $pizza = new USAPizza();
     
132. $pizza->orderPizza('cheese');
     
133. echo "\n-------------\n";
     
134. // 购买中国传统馅饼
     
135. $pizza2 = new CHINAPizza();
     
136. $pizza2->orderPizza('egg');