RSS订阅功能，在很多网站都可以有但也有很多，下面代码是自己写的，其中使用到了一个PHP类：RSS.class.
php，感觉非常方便，不敢独享，特拿出来跟大家分享。
代码如下复制代码include_once("class/rss.class.php");//引入rss php类$rss= new rss("名称","地址","描述","rss频道图标");$rss->additem("日志的标题","日志的地址","日志的摘要","日志的发布日期");$rss->display();//输出rss内容
全部代码如下：
PHP 8.5.5 PHP 8.5.5 是 PHP 8.5 分支的维护更新版本。该版本延续了“小步快跑”的迭代逻辑，通过深度错误修复、底层性能微调以及安全加固，旨在为开发者提供一个更健壮、更高效的运行环境。该版本严格遵守语义化版本规范，不包含破坏性变更。
下载代码如下复制代码// +----------------------------------------------------------------------// | YBlog// +----------------------------------------------------------------------// | Copyright (c) 2008 http://www.hzhuti.com/nokia/n97/ All rights reserved.// +----------------------------------------------------------------------// +----------------------------------------------------------------------// | Author: yhustc// +----------------------------------------------------------------------// $Id$/**+------------------------------------------------------------------------------* RSS生成类+------------------------------------------------------------------------------* @author yhustc* @version $Id$+------------------------------------------------------------------------------*/class RSS{/**+----------------------------------------------------------* RSS频道名+----------------------------------------------------------* @var string* @access protected+----------------------------------------------------------*/protected $channel_title = "';/**+----------------------------------------------------------* RSS频道链接+----------------------------------------------------------* @var string* @access protected+----------------------------------------------------------*/protected $channel_link = "';/**+----------------------------------------------------------* RSS频道描述+----------------------------------------------------------* @var string* @access protected+----------------------------------------------------------*/protected $channel_description = '';/**+----------------------------------------------------------* RSS频道使用的小图标的URL+----------------------------------------------------------* @var string* @access protected+----------------------------------------------------------*/protected $channel_imgurl = '';/**+----------------------------------------------------------* RSS频道所使用的语言+----------------------------------------------------------* @var string* @access protected+----------------------------------------------------------*/protected $language = 'zh_CN';/**+----------------------------------------------------------* RSS文档创建日期，默认为今天+----------------------------------------------------------* @var string* @access protected+----------------------------------------------------------*/protected $pubDate = '';protected $lastBuildDate = '';protected $generator = 'YBlog RSS Generator';/**+----------------------------------------------------------* RSS单条信息的数组+----------------------------------------------------------* @var string* @access protected+----------------------------------------------------------*/protected $items = array();/**+----------------------------------------------------------* 构造函数+----------------------------------------------------------* @access public+----------------------------------------------------------* @param string $title RSS频道名* @param string $link RSS频道链接* @param string $description RSS频道描述* @param string $imgurl RSS频道图标+----------------------------------------------------------*/public function __construct($title, $link, $description, $imgurl = ''){$this->channel_title = $title;$this->channel_link = $link;$this->channel_description = $description;$this->channel_imgurl = $imgurl;$this->pubDate = Date('Y-m-d H:i:s', time());$this->lastBuildDate = Date('Y-m-d H:i:s', time());}/**+----------------------------------------------------------* 设置私有变量+----------------------------------------------------------* @access public+----------------------------------------------------------* @param string $key 变量名* @param string $value 变量的值+----------------------------------------------------------*/public function Config($key,$value){$this->{$key} = $value;}/**+----------------------------------------------------------* 添加RSS项+----------------------------------------------------------* @access public+----------------------------------------------------------* @param string $title 日志的标题* @param string $link 日志的链接* @param string $description 日志的摘要* @param string $pubDate 日志的发布日期+----------------------------------------------------------*/function AddItem($title, $link, $description, $pubDate){$this->items[] = array('title' => $title, 'link' => $link, 'description' => $description, 'pubDate' => $pubDate);}/**+----------------------------------------------------------* 输出RSS的XML为字符串+----------------------------------------------------------* @access public+----------------------------------------------------------* @return string+----------------------------------------------------------*/public function Fetch(){$rss = "rn";$rss = "rn";$rss .= "rn";$rss .= "channel_title}]]>rn";$rss .= "channel_description}]]>rn";$rss .= "{$this->channel_link}rn";$rss .= "{$this->language}rn";if (!empty($this->pubDate))$rss .= "{$this->pubDate}rn";if (!empty($this->lastBuildDate))$rss .= "{$this->lastBuildDate}rn";if (!empty($this->generator))$rss .= "{$this->generator}rn";$rss .= "5rn";if (!empty($this->channel_imgurl)) {$rss .= "rn";$rss .= "channel_title}]]>rn";$rss .= "{$this->channel_link}rn";$rss .= "{$this->channel_imgurl}rn";$rss .= "rn";}for ($i = 0; $i items); $i++) {$rss .= "rn";$rss .= "items[$i]['title']}]]>rn";$rss .= "{$this->items[$i]['link']}rn";$rss .= "items[$i]['description']}]]>rn";$rss .= "{$this->items[$i]['pubDate']}rn";$rss .= "rn";}$rss .= "rn";return $rss;}/**+----------------------------------------------------------* 输出RSS的XML到浏览器+----------------------------------------------------------* @access public+----------------------------------------------------------* @return void+----------------------------------------------------------*/public function Display(){header("Content-Type: text/xml; charset=utf-8");echo $this->Fetch();exit;}}?>