php抽象工厂模式的研究

<?php

abstract class ApptEncoder{
    abstract function encode();
}

class BloggsApptEncoder extends ApptEncoder{
    function encode(){
        return "data encode farmat";
    }
}

abstract class CommsManager{
    abstract function getHeaderText();
    abstract function getApptEncoder();
    abstract function getFootText();
}

class BloggsCommsManager extends CommsManager{
    function getHeaderText(){
        return "header";
    }
    function getApptEncoder(){
        return new BloggsApptEncoder();
    }
    function getFooterText(){
        return "footer";
    }
}

 1 <?php
 2 
 3 abstract class ApptEncoder{
 4     abstract function encode();
 5 }
 6 
 7 class BloggsApptEncoder extends ApptEncoder{
 8     function encode(){
 9         return "data encode format appt";
10     }
11 }
12 
13 class BloggsTdcEncoder extends ApptEncoder{
14     function encode(){
15         return "data encode format tdc";
16     }
17 }
18 
19 class BloggsConEncoder extends ApptEncoder{
20     function encode(){
21         return "data encode format con";
22     }
23 }
24 
25 
26 abstract class CommsManager{
27     abstract function getHeaderText();
28     abstract function getApptEncoder();
29     abstract function getFootText();
30     
31     abstract function getTdcEncoder();
32     abstract function getConEncoder();
33 }
34 
35 class BloggsCommsManager extends CommsManager{
36     function getHeaderText(){
37         return "header";
38     }
39     function getApptEncoder(){
40         return new BloggsApptEncoder();
41     }
42     function getFooterText(){
43         return "footer";
44     }
45     
46     
47     function getTdcEncoder(){
48         return new BloggsTdcEncoder();
49     }
50     
51     function getConEncoder(){
52         return new BloggsConEncoder();
53     }
54 }