PHP RSS/Feed 生成类库(支持RSS 1.0/2.0和ATOM)

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　　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)
　　
下载 : FeedWriter

　　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;
}
}