RSS（简易信息聚合，也叫聚合内容）是一种描述和同步网站内容的格式。网络用户可以在客户端借助于支持RSS的聚合工具软件，在不打开网站内容页面的情况下阅读支持RSS输出的网站内容。
RSS的作用，就是帮助用户快速筛选获取网站最新更新的自己喜欢的内容，节省了到网站去搜寻的时间。似乎博客总是少不了RSS，下面分享一个我在WBlog程序中使用的一个RSS类
完整的代码：
<?php
// +----------------------------------------------------------------------
// | YBlog
// +----------------------------------------------------------------------
// | Copyright (c) 2008 http://www.yhustc.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yhustc <yhustc@gmail.com>
// +----------------------------------------------------------------------
// $Id$
/**
+------------------------------------------------------------------------------
* RSS生成类
+------------------------------------------------------------------------------
* @author yhustc <yhustc@gmail.com>
* @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 = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n";
$rss = "<rss version=\"2.0\">\r\n";
$rss .= "<channel>\r\n";
$rss .= "<title><![CDATA[{$this->channel_title}]]></title>\r\n";
$rss .= "<description><![CDATA[{$this->channel_description}]]></description>\r\n";
$rss .= "<link>{$this->channel_link}</link>\r\n";
$rss .= "<language>{$this->language}</language>\r\n";
if (!empty($this->pubDate))
$rss .= "<pubDate>{$this->pubDate}</pubDate>\r\n";
if (!empty($this->lastBuildDate))
$rss .= "<lastBuildDate>{$this->lastBuildDate}</lastBuildDate>\r\n";
if (!empty($this->generator))
$rss .= "<generator>{$this->generator}</generator>\r\n";
$rss .= "<ttl>5</ttl>\r\n";
if (!empty($this->channel_imgurl)) {
$rss .= "<image>\r\n";
$rss .= "<title><![CDATA[{$this->channel_title}]]></title>\r\n";
$rss .= "<link>{$this->channel_link}</link>\r\n";
$rss .= "<url>{$this->channel_imgurl}</url>\r\n";
$rss .= "</image>\r\n";
}
for ($i = 0; $i < count($this->items); $i++) {
$rss .= "<item>\r\n";
$rss .= "<title><![CDATA[{$this->items[$i]['title']}]]></title>\r\n";
$rss .= "<link>{$this->items[$i]['link']}</link>\r\n";
$rss .= "<description><![CDATA[{$this->items[$i]['description']}]]></description>\r\n";
$rss .= "<pubDate>{$this->items[$i]['pubDate']}</pubDate>\r\n";
$rss .= "</item>\r\n";
}
$rss .= "</channel>\r\n</rss>";
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;
}
}
?>
在thinkphp控制器中的调用方法
02 |
class FeedAction extends Action { |
05 |
public function index() { |
06 |
$Bloginfo = M('Bloginfo')->find(); |
08 |
$Bloglist = D('News')->order('id')->limit(10)->select(); |
12 |
$RSS = new RSS($Bloginfo['name'],'',$Bloginfo['description'],''); |
14 |
foreach($Bloglist as $list){ |
15 |
$RSS->AddItem($list['title'],U('/Web/'.$list['id']),$list['content'],$list['ctime']); |
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