PHP只读属性类的定义 

 1 <?php
 2     /**
 3      * 只读属性类的定义
 4      *
 5      * Project: Tiwer Hypertext Preprocessor Development Frameworks
 6      *
 7      * Site: http://wgw8299.cnblogs.com/
 8      *
 9      * $Id: variables.php 241 2010-09-14 13:52:01 wgw8299 $
10      *
11      * Copyright (C) 2008-2009 Tiwer All Rights Reserved.
12      */
13     class ClassName {
14     
15         /* private variables */
16         private $aValue;
17         
18         /* public members __set */
19         public function __set($name, $value) {
20             if ( isset( $this->$name ) ) {
21                 trigger_error( $name . 'is readonly !', E_USER_NOTICE );
22             } else {
23                 $this->$name = $value;
24             }
25         }
26         
27         /* public members __get */
28         public function __get($name) {
29             if( isset( $this->$name ) ) {
30                 return $this->$name;
31             } else {
32                 trigger_error( $name . ' variables undefined',  E_USER_NOTICE );
33             }
34         }
35     }
36     
37     /* new object */
38     $object = new ClassName();
39     
40     /* Test Use Cases  */
41     $object->aValue = 'wgw8299';
42     echo $object->aVaalue;
43  ?>

 

posted @ 2010-10-28 11:22  wgw8299  阅读(1346)  评论(0)    收藏  举报