第一次写博客，大家多多关照！欢迎拍砖哦！
我也刚学设计模式，所以记录下来。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87 |
<?phpclass person{ public
$name; public
$birthday; public
function __set($name,$value){ if(isset($this->$name)) $this->$name=$value; } public
function __get($name){ if(isset($this->$name)) return
$this->$name; }}//观察者类实现SplSubject接口，SplSubject是php内置接口class PersonSubject implements
SplSubject{ public
$observers,$person; public
function __construct(person $person){ $this->observers = new
SplObjectStorage(); $this->person=$person; } //增加一个观察者 public
function attach(SplObserver $observers){ $this->observers->attach($observers); } //删除一个观察者 public
function detach(SplObserver $observers){ $this->observers->detach($observers); } //达到条件时，通知观察者 public
function notify(){ foreach($this->observers as
$observer){ $observer->update($this); } } //返回被观察者实例，供观察者处理 public
function getPerson(){ return
$this->person; }}//观察者实现SplObserver接口，SplObserver是php内置接口class fatherObserver implements
SplObserver{ //条件达到时，执行的动作 public
function update(SplSubject $splsubject){ $person=$splsubject->getPerson(); echo
$person->name.‘ 生日快乐，我是爸爸！‘; }}class motherObserver implements
SplObserver{ public
function update(SplSubject $splsubject){ $person=$splsubject->getPerson(); echo
$person->name.‘ 生日快乐，我是妈妈！‘; }}class sisterObserver implements
SplObserver{ public
function update(SplSubject $splsubject){ $person=$splsubject->getPerson(); echo
$person->name.‘ 生日快乐，我是姐姐！‘; }}//实例化小明$xiaoming=new
person();$xiaoming->name=‘小明‘;$xiaoming->birthday=‘0512‘;//绑定观察者$subject=new
PersonSubject($xiaoming);$subject->attach(new
fatherObserver);$subject->attach(new
motherObserver);$subject->attach(new
sisterObserver);//如果小明生日到了,通知观察者$date=date(‘md‘,time());if($xiaoming->birthday==$date){ $subject->notify();}?> |
输出 
大家自己看吧，项目中我也没用到观察者模式，郁闷！
原文：http://www.cnblogs.com/xiaotongs/p/3724525.html