PHP RSS/Feed类库

通用PHP RSS/Feed 生成类库(支持RSS 1.0/2.0和ATOM)
PHP Universal Feed Generator (supports RSS 1.0, RSS 2.0 and ATOM)

 

可 生成的RSS版本:

• RSS 1.0 (which officially obsoleted RSS 0.90)
• RSS 2.0 (which officially obsoleted RSS 0.91, 0.92, 0.93 and 0.94)
• ATOM 1.0

功能:

• 可生成RSS 1.0, RSS 2.0 和ATOM 1.0 feeds
• 所有生成的Feed可经过验证 feed validator .
• 支 持所有Feed属性.
• 容易的设置channel 和 feed 条目
• 为不同的版本使用命名空间.
• 自 动转换日期格式.
• 为ATOM feeds生成 UUID (通用唯一标识符 Universally Unique Identifier).
• 支持子标签和子标签属性. (如: image 和 encloser tags)
• 完全的 PHP5面向对像构造 class structure.
• 为需要的标签CDATA 编码.
• 使用差不多的代码生成所有 版本的feed

使用范例：

<?php
  // This is a minimum example of using the class
  include("FeedWriter.php");
 
  //Creating an instance of FeedWriter class.
  $TestFeed = new FeedWriter(RSS2);
 
  //Setting the channel elements
  //Use wrapper functions for common channel elements
  $TestFeed->setTitle('Testing & Checking the RSS writer class');
  $TestFeed->setLink('http://www.ajaxray.com/projects/rss');
  $TestFeed->setDescription('This is test of creating a RSS 2.0 feed Universal Feed Writer');
 
  //Image title and link must match with the 'title' and 'link' channel elements for valid RSS 2.0
  $TestFeed->setImage('Testing the RSS writer class','http://www.ajaxray.com/projects/rss','http://www.rightbrainsolution.com/images/logo.gif');
 
    //Detriving informations from database addin feeds
    $db->query($query);
    $result = $db->result;
 
    while($row = mysql_fetch_array($result, MYSQL_ASSOC))
    {
        //Create an empty FeedItem
        $newItem = $TestFeed->createNewItem();
        
        //Add elements to the feed item   
        $newItem->setTitle($row['title']);
        $newItem->setLink($row['link']);
        $newItem->setDate($row['create_date']);
        $newItem->setDescription($row['description']);
        
        //Now add the feed item
        $TestFeed->addItem($newItem);
    }
 
  //OK. Everything is done. Now genarate the feed.
  $TestFeed->genarateFeed();
 
?>

 

补充：
另一个生成RSS 2.0的PHP Class    下载: class_rss_writer.php

<?php
 
/**
 * 使用范例：
 * ==============================================================
    $feed = new RSS();
    $feed->title       = "RSS Feed Title";
    $feed->link        = "http://www.newyork.com/";
    $feed->description = "Recent articles on newyork.com.";
 
    $db->query($query);
    $result = $db->result;
    while($row = mysql_fetch_array($result, MYSQL_ASSOC))
    {
        $item = new RSSItem();
        $item->title = $title;
        $item->link  = $link;
        $item->setPubDate($create_date);
        $item->description = "<![CDATA[ $html ]]>";
        $feed->addItem($item);
    }
    echo $feed->serve();
 * ==============================================================
 */
 
class RSS
{
    var $title;
    var $link;
    var $description;
    var $language = "en-us";
    var $pubDate;
    var $items;
    var $tags;
 
    function RSS() {
        $this->items = array();
        $this->tags  = array();
    }
 
    function addItem($item) {
        $this->items[] = $item;
    }
 
    function setPubDate($when) {
        if(strtotime($when) == false)
            $this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
        else
            $this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
    }
 
    function getPubDate() {
        if(empty($this->pubDate))
            return date("D, d M Y H:i:s ") . "GMT";
        else
            return $this->pubDate;
    }
 
    function addTag($tag, $value) {
        $this->tags[$tag] = $value;
    }
 
    function out() {
        $out  = $this->header();
        $out .= "<channel>\n";
        $out .= "<title>" . $this->title . "</title>\n";
        $out .= "<link>" . $this->link . "</link>\n";
        $out .= "<description>" . $this->description . "</description>\n";
        $out .= "<language>" . $this->language . "</language>\n";
        $out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";
 
        foreach($this->tags as $key => $val)
            $out .= "<$key>$val</$key>\n";
        foreach($this->items as $item)
            $out .= $item->out();
 
        $out .= "</channel>\n";           
        $out .= $this->footer();
 
        $out = str_replace("&", "&amp;", $out);
        return $out;
    }
    
    function serve($contentType = "application/xml") {
        $xml = $this->out();
        header("Content-type: $contentType");
        echo $xml;
    }
 
    function header() {
        $out  = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
        $out .= '<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">' . "\n";
        return $out;
    }
 
    function footer() {
        return '</rss>';
    }
}
 
class RSSItem
{
    var $title;
    var $link;
    var $description;
    var $pubDate;
    var $guid;
    var $tags;
    var $attachment;
    var $length;
    var $mimetype;
 
    function RSSItem() {
        $this->tags = array();
    }
 
    function setPubDate($when) {
        if(strtotime($when) == false)
            $this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
        else
            $this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
    }
 
    function getPubDate() {
        if(empty($this->pubDate))
            return date("D, d M Y H:i:s ") . "GMT";
        else
            return $this->pubDate;
    }
 
    function addTag($tag, $value) {
        $this->tags[$tag] = $value;
    }
 
    function out() {
        $out .= "<item>\n";
        $out .= "<title>" . $this->title . "</title>\n";
        $out .= "<link>" . $this->link . "</link>\n";
        $out .= "<description>" . $this->description . "</description>\n";
        $out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";
 
        if($this->attachment != "")
            $out .= "<enclosure url='{$this->attachment}' length='{$this->length}' type='{$this->mimetype}' />";
 
        if(empty($this->guid)) $this->guid = $this->link;
        $out .= "<guid>" . $this->guid . "</guid>\n";
 
        foreach($this->tags as $key => $val) $out .= "<$key>$val</$key\n>";
        $out .= "</item>\n";
        return $out;
    }
 
    function enclosure($url, $mimetype, $length) {
        $this->attachment = $url;
        $this->mimetype   = $mimetype;
        $this->length     = $length;
    }
}

SimplePie是一个非常简单、实用的Syndication数据处理工具包。使用SimplePie ，可以快速的分析阅读RSS或Atom格 式数据。之前接触的更多是MagpieRSS，SimplePie在对RSS或Atom的数据处理能力上毫不逊色于MagpieRSS，同时 SimplePie拥有了比MagpieRSS更多的实用方法和属性，这可以帮助你快速的构建一个RSS阅读器或RSS数据处理模块。

<?php
include ('simplepie/simplepie.inc');

$simplepie=new SimplePie();
$simplepie->set_feed_url('http://ggggqqqqihc.yo2.cn/feed');
$simplepie->init();
echo '<h1>'.$simplepie->get_title().'</h1>';
foreach ($simplepie->get_items() as $item){
	echo '<h2><a href="'.$item->get_permalink().'">'.$item->get_title().'</a></h2>';
	echo '<p>'.$item->get_content().'</p>';
}
?>

获取到数据之后，调用 SimplePie 提供的实用方法，就很容易组装成一个个人的RSS阅读器了。

SimplePie 设计的一个很大的不合理之处是将 items 的排序方法内置在 init 方法中，这样想使用原生数据就需通过其他方式来实现了。