RSS訂閱功能,在很多網(wǎng)站都可以有但也有很多,下面代碼是自己寫的,其中使用到了一個PHP類:RSS.class.php,感覺非常方便,不敢獨享,特拿出來跟大家分享.

類的調(diào)用代碼如下:

1. include_once("class/RSS.class.php");//引入RSS PHP類 
2. $RSS= new RSS("名稱","地址","描述","RSS頻道圖標"); 
3. $RSS->AddItem("日志的標題","日志的地址","日志的摘要","日志的發(fā)布日期"); 
4. $RSS->Display();//輸出RSS內(nèi)容 

全部代碼如下:

1. <?php 
2. // +---------------------------------------------------------------------- 
3. // | YBlog 
4. // +---------------------------------------------------------------------- 
5. // | Copyright (c) 2008 http://www.111cn.net/nokia/n97/ All rights reserved. 
6. // +---------------------------------------------------------------------- 
7. // +---------------------------------------------------------------------- 
8. // | Author: yhustc <yhustc@gmail.com> 
9. // +---------------------------------------------------------------------- 
10. // $Id$ 
11.  
12. /** 
13.  +------------------------------------------------------------------------------ 
14.  * RSS生成類 
15.  +------------------------------------------------------------------------------ 
16.  * @author    yhustc <yhustc@gmail.com> 
17.  * @version   $Id$ 
18.  +------------------------------------------------------------------------------ 
19.  */ 
20. class RSS 
21. { 
22.     /** 
23.      +---------------------------------------------------------- 
24.      * RSS頻道名 
25.      +---------------------------------------------------------- 
26.      * @var string 
27.      * @access protected 
28.      +---------------------------------------------------------- 
29.      */ 
30.     protected $channel_title = ''; 
31.     /** 
32.      +---------------------------------------------------------- 
33.      * RSS頻道鏈接 
34.      +---------------------------------------------------------- 
35.      * @var string 
36.      * @access protected 
37.      +---------------------------------------------------------- 
38.      */ 
39.     protected $channel_link = ''; 
40.     /** 
41.      +---------------------------------------------------------- 
42.      * RSS頻道描述 
43.      +---------------------------------------------------------- 
44.      * @var string 
45.      * @access protected 
46.      +---------------------------------------------------------- 
47.      */ 
48.     protected $channel_description = ''; 
49.     /** 
50.      +---------------------------------------------------------- 
51.      * RSS頻道使用的小圖標的URL 
52.      +---------------------------------------------------------- 
53.      * @var string 
54.      * @access protected 
55.      +---------------------------------------------------------- 
56.      */ 
57.     protected $channel_imgurl = ''; 
58.     /** 
59.      +---------------------------------------------------------- 
60.      * RSS頻道所使用的語言 
61.      +---------------------------------------------------------- 
62.      * @var string 
63.      * @access protected 
64.      +---------------------------------------------------------- 
65.      */ 
66.     protected $language = 'zh_CN'; 
67.     /** 
68.      +---------------------------------------------------------- 
69.      * RSS文檔創(chuàng)建日期，默認為今天 
70.      +---------------------------------------------------------- 
71.      * @var string 
72.      * @access protected 
73.      +---------------------------------------------------------- 
74.      */ 
75.     protected $pubDate = ''; 
76.     protected $lastBuildDate = ''; 
77.  
78.     protected $generator = 'YBlog RSS Generator'; 
79.  
80.     /** 
81.      +---------------------------------------------------------- 
82.      * RSS單條信息的數(shù)組 
83.      +---------------------------------------------------------- 
84.      * @var string 
85.      * @access protected 
86.      +---------------------------------------------------------- 
87.      */ 
88.     protected $items = array(); 
89.  
90.     /** 
91.      +---------------------------------------------------------- 
92.      * 構造函數(shù) 
93.      +---------------------------------------------------------- 
94.      * @access public  
95.      +---------------------------------------------------------- 
96.      * @param string $title  RSS頻道名 
97.      * @param string $link  RSS頻道鏈接 
98.      * @param string $description  RSS頻道描述 
99.      * @param string $imgurl  RSS頻道圖標 
100.      +---------------------------------------------------------- 
101.      */ 
102.     public function __construct($title, $link, $description, $imgurl = '') 
103.     { 
104.         $this->channel_title = $title; 
105.         $this->channel_link = $link; 
106.         $this->channel_description = $description; 
107.         $this->channel_imgurl = $imgurl; 
108.         $this->pubDate = Date('Y-m-d H:i:s', time()); 
109.         $this->lastBuildDate = Date('Y-m-d H:i:s', time()); 
110.     } 
111.  
112.     /** 
113.      +---------------------------------------------------------- 
114.      * 設置私有變量 
115.      +---------------------------------------------------------- 
116.      * @access public  
117.      +---------------------------------------------------------- 
118.      * @param string $key  變量名 
119.      * @param string $value  變量的值 
120.      +---------------------------------------------------------- 
121.      */ 
122.      public function Config($key,$value) 
123.      { 
124.         $this->{$key} = $value; 
125.      } 
126.  
127.     /** 
128.      +---------------------------------------------------------- 
129.      * 添加RSS項 
130.      +---------------------------------------------------------- 
131.      * @access public  
132.      +---------------------------------------------------------- 
133.      * @param string $title  日志的標題 
134.      * @param string $link  日志的鏈接 
135.      * @param string $description  日志的摘要 
136.      * @param string $pubDate  日志的發(fā)布日期 
137.      +---------------------------------------------------------- 
138.      */ 
139.      function AddItem($title, $link, $description, $pubDate) 
140.      { 
141.         $this->items[] = array('title' => $title, 'link' => $link, 'description' => $description, 'pubDate' => $pubDate); 
142.      } 
143.  
144.      /** 
145.      +---------------------------------------------------------- 
146.      * 輸出RSS的XML為字符串 
147.      +---------------------------------------------------------- 
148.      * @access public  
149.      +---------------------------------------------------------- 
150.      * @return string 
151.      +---------------------------------------------------------- 
152.      */ 
153.     public function Fetch() 
154.     { 
155.         $rss = "<?xml version="1.0" encoding="utf-8" ?>rn"; 
156.         $rss = "<rss version="2.0">rn"; 
157.         $rss .= "<channel>rn"; 
158.         $rss .= "<title><![CDATA[{$this->channel_title}]]></title>rn"; 
159.         $rss .= "<description><![CDATA[{$this->channel_description}]]></description>rn"; 
160.         $rss .= "<link>{$this->channel_link}</link>rn"; 
161.         $rss .= "<language>{$this->language}</language>rn"; 
162.  
163.         if (!emptyempty($this->pubDate)) 
164.             $rss .= "<pubDate>{$this->pubDate}</pubDate>rn"; 
165.         if (!emptyempty($this->lastBuildDate)) 
166.             $rss .= "<lastBuildDate>{$this->lastBuildDate}</lastBuildDate>rn"; 
167.         if (!emptyempty($this->generator)) 
168.             $rss .= "<generator>{$this->generator}</generator>rn"; 
169.  
170.         $rss .= "<ttl>5</ttl>rn"; 
171.  
172.         if (!emptyempty($this->channel_imgurl)) { 
173.             $rss .= "<image>rn"; 
174.             $rss .= "<title><![CDATA[{$this->channel_title}]]></title>rn"; 
175.             $rss .= "<link>{$this->channel_link}</link>rn"; 
176.             $rss .= "<url>{$this->channel_imgurl}</url>rn"; 
177.             $rss .= "</image>rn"; 
178.         } 
179.  
180.         for ($i = 0; $i < count($this->items); $i++) { 
181.             $rss .= "<item>rn"; 
182.             $rss .= "<title><![CDATA[{$this->items[$i]['title']}]]></title>rn"; 
183.             $rss .= "<link>{$this->items[$i]['link']}</link>rn"; 
184.             $rss .= "<description><![CDATA[{$this->items[$i]['description']}]]></description>rn"; 
185.             $rss .= "<pubDate>{$this->items[$i]['pubDate']}</pubDate>rn"; 
186.             $rss .= "</item>rn"; 
187.         } 
188.  
189.         $rss .= "</channel>rn</rss>"; 
190.         return $rss; 
191.     } 
192.  
193.     /** 
194.      +---------------------------------------------------------- 
195.      * 輸出RSS的XML到瀏覽器 
196.      +---------------------------------------------------------- 
197.      * @access public  
198.      +---------------------------------------------------------- 
199.      * @return void 
200.      +---------------------------------------------------------- 
201.      */ 
202.     public function Display() 
203.     { 
204.         header("Content-Type: text/xml; charset=utf-8"); 
205.         echo $this->Fetch();//開源代碼Vevb.com 
206.         exit; 
207.     } 
208. } 
209. ?>