From ed313cdea970b1e113e80dacc229417b7ab7f3bc Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@madoka.spb.ru>
Date: Thu, 12 Oct 2006 04:27:03 +0100
Subject: [PATCH] use FeedCreator to generate syndicated feeds

---
 README                |    3 +-
 feedcreator.class.php | 1541 +++++++++++++++++++++++++++++++++++++++++
 functions.php         |   34 +-
 3 files changed, 1557 insertions(+), 21 deletions(-)
 create mode 100644 feedcreator.class.php

diff --git a/README b/README
index 2d00e23c5..16d1d1dfe 100644
--- a/README
+++ b/README
@@ -14,8 +14,9 @@ Portions (C):
 	Sundar Dorai-Raj <sdoraira@vt.edu> (isNumeric() in functions.js)
 
 Uses Prototype javascript library, from http://prototype.conio.net/
+Uses FeedCreator library, from http://www.bitfolge.de/rsscreator-en.html
 
-Licensed under GNU GPL version 2
+Tiny Tiny RSS is licensed under GNU GPL version 2
 
 Features Overview
 =================
diff --git a/feedcreator.class.php b/feedcreator.class.php
new file mode 100644
index 000000000..1d57fac45
--- /dev/null
+++ b/feedcreator.class.php
@@ -0,0 +1,1541 @@
+<?php
+/***************************************************************************
+
+FeedCreator class v1.7.2
+originally (c) Kai Blankenhorn
+www.bitfolge.de
+kaib@bitfolge.de
+v1.3 work by Scott Reynen (scott@randomchaos.com) and Kai Blankenhorn
+v1.5 OPML support by Dirk Clemens
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+****************************************************************************
+
+
+Changelog:
+
+v1.7.2	10-11-04
+	license changed to LGPL
+
+v1.7.1
+	fixed a syntax bug
+	fixed left over debug code
+
+v1.7	07-18-04
+	added HTML and JavaScript feeds (configurable via CSS) (thanks to Pascal Van Hecke)
+	added HTML descriptions for all feed formats (thanks to Pascal Van Hecke)
+	added a switch to select an external stylesheet (thanks to Pascal Van Hecke)
+	changed default content-type to application/xml
+	added character encoding setting
+	fixed numerous smaller bugs (thanks to Sören Fuhrmann of golem.de)
+	improved changing ATOM versions handling (thanks to August Trometer)
+	improved the UniversalFeedCreator's useCached method (thanks to Sören Fuhrmann of golem.de)
+	added charset output in HTTP headers (thanks to Sören Fuhrmann of golem.de)
+	added Slashdot namespace to RSS 1.0 (thanks to Sören Fuhrmann of golem.de)
+
+v1.6	05-10-04
+	added stylesheet to RSS 1.0 feeds
+	fixed generator comment (thanks Kevin L. Papendick and Tanguy Pruvot)
+	fixed RFC822 date bug (thanks Tanguy Pruvot)
+	added TimeZone customization for RFC8601 (thanks Tanguy Pruvot)
+	fixed Content-type could be empty (thanks Tanguy Pruvot)
+	fixed author/creator in RSS1.0 (thanks Tanguy Pruvot)
+
+v1.6 beta	02-28-04
+	added Atom 0.3 support (not all features, though)
+	improved OPML 1.0 support (hopefully - added more elements)
+	added support for arbitrary additional elements (use with caution)
+	code beautification :-)
+	considered beta due to some internal changes
+
+v1.5.1	01-27-04
+	fixed some RSS 1.0 glitches (thanks to Stéphane Vanpoperynghe)
+	fixed some inconsistencies between documentation and code (thanks to Timothy Martin)
+
+v1.5	01-06-04
+	added support for OPML 1.0
+	added more documentation
+
+v1.4	11-11-03
+	optional feed saving and caching
+	improved documentation
+	minor improvements
+
+v1.3    10-02-03
+	renamed to FeedCreator, as it not only creates RSS anymore
+	added support for mbox
+	tentative support for echo/necho/atom/pie/???
+        
+v1.2    07-20-03
+	intelligent auto-truncating of RSS 0.91 attributes
+	don't create some attributes when they're not set
+	documentation improved
+	fixed a real and a possible bug with date conversions
+	code cleanup
+
+v1.1    06-29-03
+	added images to feeds
+	now includes most RSS 0.91 attributes
+	added RSS 2.0 feeds
+
+v1.0    06-24-03
+	initial release
+
+
+
+***************************************************************************/
+
+/*** GENERAL USAGE *********************************************************
+
+include("feedcreator.class.php"); 
+
+$rss = new UniversalFeedCreator(); 
+$rss->useCached(); // use cached version if age<1 hour
+$rss->title = "PHP news"; 
+$rss->description = "daily news from the PHP scripting world"; 
+
+//optional
+$rss->descriptionTruncSize = 500;
+$rss->descriptionHtmlSyndicated = true;
+
+$rss->link = "http://www.dailyphp.net/news"; 
+$rss->syndicationURL = "http://www.dailyphp.net/".$_SERVER["PHP_SELF"]; 
+
+$image = new FeedImage(); 
+$image->title = "dailyphp.net logo"; 
+$image->url = "http://www.dailyphp.net/images/logo.gif"; 
+$image->link = "http://www.dailyphp.net"; 
+$image->description = "Feed provided by dailyphp.net. Click to visit."; 
+
+//optional
+$image->descriptionTruncSize = 500;
+$image->descriptionHtmlSyndicated = true;
+
+$rss->image = $image; 
+
+// get your news items from somewhere, e.g. your database: 
+mysql_select_db($dbHost, $dbUser, $dbPass); 
+$res = mysql_query("SELECT * FROM news ORDER BY newsdate DESC"); 
+while ($data = mysql_fetch_object($res)) { 
+    $item = new FeedItem(); 
+    $item->title = $data->title; 
+    $item->link = $data->url; 
+    $item->description = $data->short; 
+    
+    //optional
+    item->descriptionTruncSize = 500;
+    item->descriptionHtmlSyndicated = true;
+
+    $item->date = $data->newsdate; 
+    $item->source = "http://www.dailyphp.net"; 
+    $item->author = "John Doe"; 
+     
+    $rss->addItem($item); 
+} 
+
+// valid format strings are: RSS0.91, RSS1.0, RSS2.0, PIE0.1 (deprecated),
+// MBOX, OPML, ATOM, ATOM0.3, HTML, JS
+echo $rss->saveFeed("RSS1.0", "news/feed.xml");
+
+
+***************************************************************************
+*          A little setup                                                 *
+**************************************************************************/
+
+// your local timezone, set to "" to disable or for GMT
+define("TIME_ZONE","+01:00");
+
+
+
+
+/**
+ * Version string.
+ **/
+define("FEEDCREATOR_VERSION", "FeedCreator 1.7.2");
+
+
+
+/**
+ * A FeedItem is a part of a FeedCreator feed.
+ *
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ * @since 1.3
+ */
+class FeedItem extends HtmlDescribable {
+	/**
+	 * Mandatory attributes of an item.
+	 */
+	var $title, $description, $link;
+	
+	/**
+	 * Optional attributes of an item.
+	 */
+	var $author, $authorEmail, $image, $category, $comments, $guid, $source, $creator;
+	
+	/**
+	 * Publishing date of an item. May be in one of the following formats:
+	 *
+	 *	RFC 822:
+	 *	"Mon, 20 Jan 03 18:05:41 +0400"
+	 *	"20 Jan 03 18:05:41 +0000"
+	 *
+	 *	ISO 8601:
+	 *	"2003-01-20T18:05:41+04:00"
+	 *
+	 *	Unix:
+	 *	1043082341
+	 */
+	var $date;
+	
+	/**
+	 * Any additional elements to include as an assiciated array. All $key => $value pairs
+	 * will be included unencoded in the feed item in the form
+	 *     <$key>$value</$key>
+	 * Again: No encoding will be used! This means you can invalidate or enhance the feed
+	 * if $value contains markup. This may be abused to embed tags not implemented by
+	 * the FeedCreator class used.
+	 */
+	var $additionalElements = Array();
+
+	// on hold
+	// var $source;
+}
+
+
+
+/**
+ * An FeedImage may be added to a FeedCreator feed.
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ * @since 1.3
+ */
+class FeedImage extends HtmlDescribable {
+	/**
+	 * Mandatory attributes of an image.
+	 */
+	var $title, $url, $link;
+	
+	/**
+	 * Optional attributes of an image.
+	 */
+	var $width, $height, $description;
+}
+
+
+
+/**
+ * An HtmlDescribable is an item within a feed that can have a description that may
+ * include HTML markup.
+ */
+class HtmlDescribable {
+	/**
+	 * Indicates whether the description field should be rendered in HTML.
+	 */
+	var $descriptionHtmlSyndicated;
+	
+	/**
+	 * Indicates whether and to how many characters a description should be truncated.
+	 */
+	var $descriptionTruncSize;
+	
+	/**
+	 * Returns a formatted description field, depending on descriptionHtmlSyndicated and
+	 * $descriptionTruncSize properties
+	 * @return    string    the formatted description  
+	 */
+	function getDescription() {
+		$descriptionField = new FeedHtmlField($this->description);
+		$descriptionField->syndicateHtml = $this->descriptionHtmlSyndicated;
+		$descriptionField->truncSize = $this->descriptionTruncSize;
+		return $descriptionField->output();
+	}
+
+}
+
+
+/**
+ * An FeedHtmlField describes and generates
+ * a feed, item or image html field (probably a description). Output is 
+ * generated based on $truncSize, $syndicateHtml properties.
+ * @author Pascal Van Hecke <feedcreator.class.php@vanhecke.info>
+ * @version 1.6
+ */
+class FeedHtmlField {
+	/**
+	 * Mandatory attributes of a FeedHtmlField.
+	 */
+	var $rawFieldContent;
+	
+	/**
+	 * Optional attributes of a FeedHtmlField.
+	 * 
+	 */
+	var $truncSize, $syndicateHtml;
+	
+	/**
+	 * Creates a new instance of FeedHtmlField.
+	 * @param  $string: if given, sets the rawFieldContent property
+	 */
+	function FeedHtmlField($parFieldContent) {
+		if ($parFieldContent) {
+			$this->rawFieldContent = $parFieldContent;
+		}
+	}
+		
+		
+	/**
+	 * Creates the right output, depending on $truncSize, $syndicateHtml properties.
+	 * @return string    the formatted field
+	 */
+	function output() {
+		// when field available and syndicated in html we assume 
+		// - valid html in $rawFieldContent and we enclose in CDATA tags
+		// - no truncation (truncating risks producing invalid html)
+		if (!$this->rawFieldContent) {
+			$result = "";
+		}	elseif ($this->syndicateHtml) {
+			$result = "<![CDATA[".$this->rawFieldContent."]]>";
+		} else {
+			if ($this->truncSize and is_int($this->truncSize)) {
+				$result = FeedCreator::iTrunc(htmlspecialchars($this->rawFieldContent),$this->truncSize);
+			} else {
+				$result = htmlspecialchars($this->rawFieldContent);
+			}
+		}
+		return $result;
+	}
+
+}
+
+
+
+/**
+ * UniversalFeedCreator lets you choose during runtime which
+ * format to build.
+ * For general usage of a feed class, see the FeedCreator class
+ * below or the example above.
+ *
+ * @since 1.3
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ */
+class UniversalFeedCreator extends FeedCreator {
+	var $_feed;
+	
+	function _setFormat($format) {
+		switch (strtoupper($format)) {
+			
+			case "2.0":
+				// fall through
+			case "RSS2.0":
+				$this->_feed = new RSSCreator20();
+				break;
+			
+			case "1.0":
+				// fall through
+			case "RSS1.0":
+				$this->_feed = new RSSCreator10();
+				break;
+			
+			case "0.91":
+				// fall through
+			case "RSS0.91":
+				$this->_feed = new RSSCreator091();
+				break;
+			
+			case "PIE0.1":
+				$this->_feed = new PIECreator01();
+				break;
+			
+			case "MBOX":
+				$this->_feed = new MBOXCreator();
+				break;
+			
+			case "OPML":
+				$this->_feed = new OPMLCreator();
+				break;
+				
+			case "ATOM":
+				// fall through: always the latest ATOM version
+				
+			case "ATOM0.3":
+				$this->_feed = new AtomCreator03();
+				break;
+				
+			case "HTML":
+				$this->_feed = new HTMLCreator();
+				break;
+			
+			case "JS":
+				// fall through
+			case "JAVASCRIPT":
+				$this->_feed = new JSCreator();
+				break;
+			
+			default:
+				$this->_feed = new RSSCreator091();
+				break;
+		}
+        
+		$vars = get_object_vars($this);
+		foreach ($vars as $key => $value) {
+			// prevent overwriting of properties "contentType", "encoding"; do not copy "_feed" itself
+			if (!in_array($key, array("_feed", "contentType", "encoding"))) {
+				$this->_feed->{$key} = $this->{$key};
+			}
+		}
+	}
+	
+	/**
+	 * Creates a syndication feed based on the items previously added.
+	 *
+	 * @see        FeedCreator::addItem()
+	 * @param    string    format    format the feed should comply to. Valid values are:
+	 *			"PIE0.1", "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM0.3", "HTML", "JS"
+	 * @return    string    the contents of the feed.
+	 */
+	function createFeed($format = "RSS0.91") {
+		$this->_setFormat($format);
+		return $this->_feed->createFeed();
+	}
+	
+	
+	
+	/**
+	 * Saves this feed as a file on the local disk. After the file is saved, an HTTP redirect
+	 * header may be sent to redirect the use to the newly created file.
+	 * @since 1.4
+	 * 
+	 * @param	string	format	format the feed should comply to. Valid values are:
+	 *			"PIE0.1" (deprecated), "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM", "ATOM0.3", "HTML", "JS"
+	 * @param	string	filename	optional	the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
+	 * @param	boolean	displayContents	optional	send the content of the file or not. If true, the file will be sent in the body of the response.
+	 */
+	function saveFeed($format="RSS0.91", $filename="", $displayContents=true) {
+		$this->_setFormat($format);
+		$this->_feed->saveFeed($filename, $displayContents);
+	}
+
+
+   /**
+    * Turns on caching and checks if there is a recent version of this feed in the cache.
+    * If there is, an HTTP redirect header is sent.
+    * To effectively use caching, you should create the FeedCreator object and call this method
+    * before anything else, especially before you do the time consuming task to build the feed
+    * (web fetching, for example).
+    *
+    * @param   string   format   format the feed should comply to. Valid values are:
+    *       "PIE0.1" (deprecated), "mbox", "RSS0.91", "RSS1.0", "RSS2.0", "OPML", "ATOM0.3".
+    * @param filename   string   optional the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
+    * @param timeout int      optional the timeout in seconds before a cached version is refreshed (defaults to 3600 = 1 hour)
+    */
+   function useCached($format="RSS0.91", $filename="", $timeout=3600) {
+      $this->_setFormat($format);
+      $this->_feed->useCached($filename, $timeout);
+   }
+
+}
+
+
+/**
+ * FeedCreator is the abstract base implementation for concrete
+ * implementations that implement a specific format of syndication.
+ *
+ * @abstract
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ * @since 1.4
+ */
+class FeedCreator extends HtmlDescribable {
+
+	/**
+	 * Mandatory attributes of a feed.
+	 */
+	var $title, $description, $link;
+	
+	
+	/**
+	 * Optional attributes of a feed.
+	 */
+	var $syndicationURL, $image, $language, $copyright, $pubDate, $lastBuildDate, $editor, $editorEmail, $webmaster, $category, $docs, $ttl, $rating, $skipHours, $skipDays;
+
+	/**
+	* The url of the external xsl stylesheet used to format the naked rss feed.
+	* Ignored in the output when empty.
+	*/
+	var $xslStyleSheet = "";
+	
+	
+	/**
+	 * @access private
+	 */
+	var $items = Array();
+ 	
+	
+	/**
+	 * This feed's MIME content type.
+	 * @since 1.4
+	 * @access private
+	 */
+	var $contentType = "application/xml";
+	
+	
+	/**
+	 * This feed's character encoding.
+	 * @since 1.6.1
+	 **/
+	var $encoding = "ISO-8859-1";
+	
+	
+	/**
+	 * Any additional elements to include as an assiciated array. All $key => $value pairs
+	 * will be included unencoded in the feed in the form
+	 *     <$key>$value</$key>
+	 * Again: No encoding will be used! This means you can invalidate or enhance the feed
+	 * if $value contains markup. This may be abused to embed tags not implemented by
+	 * the FeedCreator class used.
+	 */
+	var $additionalElements = Array();
+   
+    
+	/**
+	 * Adds an FeedItem to the feed.
+	 *
+	 * @param object FeedItem $item The FeedItem to add to the feed.
+	 * @access public
+	 */
+	function addItem($item) {
+		$this->items[] = $item;
+	}
+	
+	
+	/**
+	 * Truncates a string to a certain length at the most sensible point.
+	 * First, if there's a '.' character near the end of the string, the string is truncated after this character.
+	 * If there is no '.', the string is truncated after the last ' ' character.
+	 * If the string is truncated, " ..." is appended.
+	 * If the string is already shorter than $length, it is returned unchanged.
+	 * 
+	 * @static
+	 * @param string    string A string to be truncated.
+	 * @param int        length the maximum length the string should be truncated to
+	 * @return string    the truncated string
+	 */
+	function iTrunc($string, $length) {
+		if (strlen($string)<=$length) {
+			return $string;
+		}
+		
+		$pos = strrpos($string,".");
+		if ($pos>=$length-4) {
+			$string = substr($string,0,$length-4);
+			$pos = strrpos($string,".");
+		}
+		if ($pos>=$length*0.4) {
+			return substr($string,0,$pos+1)." ...";
+		}
+		
+		$pos = strrpos($string," ");
+		if ($pos>=$length-4) {
+			$string = substr($string,0,$length-4);
+			$pos = strrpos($string," ");
+		}
+		if ($pos>=$length*0.4) {
+			return substr($string,0,$pos)." ...";
+		}
+		
+		return substr($string,0,$length-4)." ...";
+			
+	}
+	
+	
+	/**
+	 * Creates a comment indicating the generator of this feed.
+	 * The format of this comment seems to be recognized by
+	 * Syndic8.com.
+	 */
+	function _createGeneratorComment() {
+		return "<!-- generator=\"".FEEDCREATOR_VERSION."\" -->\n";
+	}
+	
+	
+	/**
+	 * Creates a string containing all additional elements specified in
+	 * $additionalElements.
+	 * @param	elements	array	an associative array containing key => value pairs
+	 * @param indentString	string	a string that will be inserted before every generated line
+	 * @return    string    the XML tags corresponding to $additionalElements
+	 */
+	function _createAdditionalElements($elements, $indentString="") {
+		$ae = "";
+		if (is_array($elements)) {
+			foreach($elements AS $key => $value) {
+				$ae.= $indentString."<$key>$value</$key>\n";
+			}
+		}
+		return $ae;
+	}
+	
+	function _createStylesheetReferences() {
+		$xml = "";
+		if ($this->cssStyleSheet) $xml .= "<?xml-stylesheet href=\"".$this->cssStyleSheet."\" type=\"text/css\"?>\n";
+		if ($this->xslStyleSheet) $xml .= "<?xml-stylesheet href=\"".$this->xslStyleSheet."\" type=\"text/xsl\"?>\n";
+		return $xml;
+	}
+	
+	
+	/**
+	 * Builds the feed's text.
+	 * @abstract
+	 * @return    string    the feed's complete text 
+	 */
+	function createFeed() {
+	}
+	
+	/**
+	 * Generate a filename for the feed cache file. The result will be $_SERVER["PHP_SELF"] with the extension changed to .xml.
+	 * For example:
+	 * 
+	 * echo $_SERVER["PHP_SELF"]."\n";
+	 * echo FeedCreator::_generateFilename();
+	 * 
+	 * would produce:
+	 * 
+	 * /rss/latestnews.php
+	 * latestnews.xml
+	 *
+	 * @return string the feed cache filename
+	 * @since 1.4
+	 * @access private
+	 */
+	function _generateFilename() {
+		$fileInfo = pathinfo($_SERVER["PHP_SELF"]);
+		return substr($fileInfo["basename"],0,-(strlen($fileInfo["extension"])+1)).".xml";
+	}
+	
+	
+	/**
+	 * @since 1.4
+	 * @access private
+	 */
+	function _redirect($filename) {
+		// attention, heavily-commented-out-area
+		
+		// maybe use this in addition to file time checking
+		//Header("Expires: ".date("r",time()+$this->_timeout));
+		
+		/* no caching at all, doesn't seem to work as good:
+		Header("Cache-Control: no-cache");
+		Header("Pragma: no-cache");
+		*/
+		
+		// HTTP redirect, some feed readers' simple HTTP implementations don't follow it
+		//Header("Location: ".$filename);
+
+		Header("Content-Type: ".$this->contentType."; charset=".$this->encoding."; filename=".basename($filename));
+		Header("Content-Disposition: inline; filename=".basename($filename));
+		readfile($filename, "r");
+		die();
+	}
+    
+	/**
+	 * Turns on caching and checks if there is a recent version of this feed in the cache.
+	 * If there is, an HTTP redirect header is sent.
+	 * To effectively use caching, you should create the FeedCreator object and call this method
+	 * before anything else, especially before you do the time consuming task to build the feed
+	 * (web fetching, for example).
+	 * @since 1.4
+	 * @param filename	string	optional	the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
+	 * @param timeout	int		optional	the timeout in seconds before a cached version is refreshed (defaults to 3600 = 1 hour)
+	 */
+	function useCached($filename="", $timeout=3600) {
+		$this->_timeout = $timeout;
+		if ($filename=="") {
+			$filename = $this->_generateFilename();
+		}
+		if (file_exists($filename) AND (time()-filemtime($filename) < $timeout)) {
+			$this->_redirect($filename);
+		}
+	}
+	
+	
+	/**
+	 * Saves this feed as a file on the local disk. After the file is saved, a redirect
+	 * header may be sent to redirect the user to the newly created file.
+	 * @since 1.4
+	 * 
+	 * @param filename	string	optional	the filename where a recent version of the feed is saved. If not specified, the filename is $_SERVER["PHP_SELF"] with the extension changed to .xml (see _generateFilename()).
+	 * @param redirect	boolean	optional	send an HTTP redirect header or not. If true, the user will be automatically redirected to the created file.
+	 */
+	function saveFeed($filename="", $displayContents=true) {
+		if ($filename=="") {
+			$filename = $this->_generateFilename();
+		}
+		$feedFile = fopen($filename, "w+");
+		if ($feedFile) {
+			fputs($feedFile,$this->createFeed());
+			fclose($feedFile);
+			if ($displayContents) {
+				$this->_redirect($filename);
+			}
+		} else {
+			echo "<br /><b>Error creating feed file, please check write permissions.</b><br />";
+		}
+	}
+	
+}
+
+
+/**
+ * FeedDate is an internal class that stores a date for a feed or feed item.
+ * Usually, you won't need to use this.
+ */
+class FeedDate {
+	var $unix;
+	
+	/**
+	 * Creates a new instance of FeedDate representing a given date.
+	 * Accepts RFC 822, ISO 8601 date formats as well as unix time stamps.
+	 * @param mixed $dateString optional the date this FeedDate will represent. If not specified, the current date and time is used.
+	 */
+	function FeedDate($dateString="") {
+		if ($dateString=="") $dateString = date("r");
+		
+		if (is_integer($dateString)) {
+			$this->unix = $dateString;
+			return;
+		}
+		if (preg_match("~(?:(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun),\\s+)?(\\d{1,2})\\s+([a-zA-Z]{3})\\s+(\\d{4})\\s+(\\d{2}):(\\d{2}):(\\d{2})\\s+(.*)~",$dateString,$matches)) {
+			$months = Array("Jan"=>1,"Feb"=>2,"Mar"=>3,"Apr"=>4,"May"=>5,"Jun"=>6,"Jul"=>7,"Aug"=>8,"Sep"=>9,"Oct"=>10,"Nov"=>11,"Dec"=>12);
+			$this->unix = mktime($matches[4],$matches[5],$matches[6],$months[$matches[2]],$matches[1],$matches[3]);
+			if (substr($matches[7],0,1)=='+' OR substr($matches[7],0,1)=='-') {
+				$tzOffset = (substr($matches[7],0,3) * 60 + substr($matches[7],-2)) * 60;
+			} else {
+				if (strlen($matches[7])==1) {
+					$oneHour = 3600;
+					$ord = ord($matches[7]);
+					if ($ord < ord("M")) {
+						$tzOffset = (ord("A") - $ord - 1) * $oneHour;
+					} elseif ($ord >= ord("M") AND $matches[7]!="Z") {
+						$tzOffset = ($ord - ord("M")) * $oneHour;
+					} elseif ($matches[7]=="Z") {
+						$tzOffset = 0;
+					}
+				}
+				switch ($matches[7]) {
+					case "UT":
+					case "GMT":	$tzOffset = 0;
+				}
+			}
+			$this->unix += $tzOffset;
+			return;
+		}
+		if (preg_match("~(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})(.*)~",$dateString,$matches)) {
+			$this->unix = mktime($matches[4],$matches[5],$matches[6],$matches[2],$matches[3],$matches[1]);
+			if (substr($matches[7],0,1)=='+' OR substr($matches[7],0,1)=='-') {
+				$tzOffset = (substr($matches[7],0,3) * 60 + substr($matches[7],-2)) * 60;
+			} else {
+				if ($matches[7]=="Z") {
+					$tzOffset = 0;
+				}
+			}
+			$this->unix += $tzOffset;
+			return;
+		}
+		$this->unix = 0;
+	}
+
+	/**
+	 * Gets the date stored in this FeedDate as an RFC 822 date.
+	 *
+	 * @return a date in RFC 822 format
+	 */
+	function rfc822() {
+		//return gmdate("r",$this->unix);
+		$date = gmdate("D, d M Y H:i:s", $this->unix);
+		if (TIME_ZONE!="") $date .= " ".str_replace(":","",TIME_ZONE);
+		return $date;
+	}
+	
+	/**
+	 * Gets the date stored in this FeedDate as an ISO 8601 date.
+	 *
+	 * @return a date in ISO 8601 format
+	 */
+	function iso8601() {
+		$date = gmdate("Y-m-d\TH:i:sO",$this->unix);
+		$date = substr($date,0,22) . ':' . substr($date,-2);
+		if (TIME_ZONE!="") $date = str_replace("+00:00",TIME_ZONE,$date);
+		return $date;
+	}
+	
+	/**
+	 * Gets the date stored in this FeedDate as unix time stamp.
+	 *
+	 * @return a date as a unix time stamp
+	 */
+	function unix() {
+		return $this->unix;
+	}
+}
+
+
+/**
+ * RSSCreator10 is a FeedCreator that implements RDF Site Summary (RSS) 1.0.
+ *
+ * @see http://www.purl.org/rss/1.0/
+ * @since 1.3
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ */
+class RSSCreator10 extends FeedCreator {
+
+	/**
+	 * Builds the RSS feed's text. The feed will be compliant to RDF Site Summary (RSS) 1.0.
+	 * The feed will contain all items previously added in the same order.
+	 * @return    string    the feed's complete text 
+	 */
+	function createFeed() {     
+		$feed = "<?xml version=\"1.0\" encoding=\"".$this->encoding."\"?>\n";
+		$feed.= $this->_createGeneratorComment();
+		if ($this->cssStyleSheet=="") {
+			$cssStyleSheet = "http://www.w3.org/2000/08/w3c-synd/style.css";
+		}
+		$feed.= $this->_createStylesheetReferences();
+		$feed.= "<rdf:RDF\n";
+		$feed.= "    xmlns=\"http://purl.org/rss/1.0/\"\n";
+		$feed.= "    xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"\n"; 
+		$feed.= "    xmlns:slash=\"http://purl.org/rss/1.0/modules/slash/\"\n";
+		$feed.= "    xmlns:dc=\"http://purl.org/dc/elements/1.1/\">\n";
+		$feed.= "    <channel rdf:about=\"".$this->syndicationURL."\">\n";
+		$feed.= "        <title>".htmlspecialchars($this->title)."</title>\n";
+		$feed.= "        <description>".htmlspecialchars($this->description)."</description>\n";
+		$feed.= "        <link>".$this->link."</link>\n";
+		if ($this->image!=null) {
+			$feed.= "        <image rdf:resource=\"".$this->image->url."\" />\n";
+		}
+		$now = new FeedDate();
+		$feed.= "       <dc:date>".htmlspecialchars($now->iso8601())."</dc:date>\n";
+		$feed.= "        <items>\n";
+		$feed.= "            <rdf:Seq>\n";
+		for ($i=0;$i<count($this->items);$i++) {
+			$feed.= "                <rdf:li rdf:resource=\"".htmlspecialchars($this->items[$i]->link)."\"/>\n";
+		}
+		$feed.= "            </rdf:Seq>\n";
+		$feed.= "        </items>\n";
+		$feed.= "    </channel>\n";
+		if ($this->image!=null) {
+			$feed.= "    <image rdf:about=\"".$this->image->url."\">\n";
+			$feed.= "        <title>".$this->image->title."</title>\n";
+			$feed.= "        <link>".$this->image->link."</link>\n";
+			$feed.= "        <url>".$this->image->url."</url>\n";
+			$feed.= "    </image>\n";
+		}
+		$feed.= $this->_createAdditionalElements($this->additionalElements, "    ");
+		
+		for ($i=0;$i<count($this->items);$i++) {
+			$feed.= "    <item rdf:about=\"".htmlspecialchars($this->items[$i]->link)."\">\n";
+			//$feed.= "        <dc:type>Posting</dc:type>\n";
+			$feed.= "        <dc:format>text/html</dc:format>\n";
+			if ($this->items[$i]->date!=null) {
+				$itemDate = new FeedDate($this->items[$i]->date);
+				$feed.= "        <dc:date>".htmlspecialchars($itemDate->iso8601())."</dc:date>\n";
+			}
+			if ($this->items[$i]->source!="") {
+				$feed.= "        <dc:source>".htmlspecialchars($this->items[$i]->source)."</dc:source>\n";
+			}
+			if ($this->items[$i]->author!="") {
+				$feed.= "        <dc:creator>".htmlspecialchars($this->items[$i]->author)."</dc:creator>\n";
+			}
+			$feed.= "        <title>".htmlspecialchars(strip_tags(strtr($this->items[$i]->title,"\n\r","  ")))."</title>\n";
+			$feed.= "        <link>".htmlspecialchars($this->items[$i]->link)."</link>\n";
+			$feed.= "        <description>".htmlspecialchars($this->items[$i]->description)."</description>\n";
+			$feed.= $this->_createAdditionalElements($this->items[$i]->additionalElements, "        ");
+			$feed.= "    </item>\n";
+		}
+		$feed.= "</rdf:RDF>\n";
+		return $feed;
+	}
+}
+
+
+
+/**
+ * RSSCreator091 is a FeedCreator that implements RSS 0.91 Spec, revision 3.
+ *
+ * @see http://my.netscape.com/publish/formats/rss-spec-0.91.html
+ * @since 1.3
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ */
+class RSSCreator091 extends FeedCreator {
+
+	/**
+	 * Stores this RSS feed's version number.
+	 * @access private
+	 */
+	var $RSSVersion;
+
+	function RSSCreator091() {
+		$this->_setRSSVersion("0.91");
+		$this->contentType = "application/rss+xml";
+	}
+	
+	/**
+	 * Sets this RSS feed's version number.
+	 * @access private
+	 */
+	function _setRSSVersion($version) {
+		$this->RSSVersion = $version;
+	}
+
+	/**
+	 * Builds the RSS feed's text. The feed will be compliant to RDF Site Summary (RSS) 1.0.
+	 * The feed will contain all items previously added in the same order.
+	 * @return    string    the feed's complete text 
+	 */
+	function createFeed() {
+		$feed = "<?xml version=\"1.0\" encoding=\"".$this->encoding."\"?>\n";
+		$feed.= $this->_createGeneratorComment();
+		$feed.= $this->_createStylesheetReferences();
+		$feed.= "<rss version=\"".$this->RSSVersion."\">\n"; 
+		$feed.= "    <channel>\n";
+		$feed.= "        <title>".FeedCreator::iTrunc(htmlspecialchars($this->title),100)."</title>\n";
+		$this->descriptionTruncSize = 500;
+		$feed.= "        <description>".$this->getDescription()."</description>\n";
+		$feed.= "        <link>".$this->link."</link>\n";
+		$now = new FeedDate();
+		$feed.= "        <lastBuildDate>".htmlspecialchars($now->rfc822())."</lastBuildDate>\n";
+		$feed.= "        <generator>".FEEDCREATOR_VERSION."</generator>\n";
+
+		if ($this->image!=null) {
+			$feed.= "        <image>\n";
+			$feed.= "            <url>".$this->image->url."</url>\n"; 
+			$feed.= "            <title>".FeedCreator::iTrunc(htmlspecialchars($this->image->title),100)."</title>\n"; 
+			$feed.= "            <link>".$this->image->link."</link>\n";
+			if ($this->image->width!="") {
+				$feed.= "            <width>".$this->image->width."</width>\n";
+			}
+			if ($this->image->height!="") {
+				$feed.= "            <height>".$this->image->height."</height>\n";
+			}
+			if ($this->image->description!="") {
+				$feed.= "            <description>".$this->image->getDescription()."</description>\n";
+			}
+			$feed.= "        </image>\n";
+		}
+		if ($this->language!="") {
+			$feed.= "        <language>".$this->language."</language>\n";
+		}
+		if ($this->copyright!="") {
+			$feed.= "        <copyright>".FeedCreator::iTrunc(htmlspecialchars($this->copyright),100)."</copyright>\n";
+		}
+		if ($this->editor!="") {
+			$feed.= "        <managingEditor>".FeedCreator::iTrunc(htmlspecialchars($this->editor),100)."</managingEditor>\n";
+		}
+		if ($this->webmaster!="") {
+			$feed.= "        <webMaster>".FeedCreator::iTrunc(htmlspecialchars($this->webmaster),100)."</webMaster>\n";
+		}
+		if ($this->pubDate!="") {
+			$pubDate = new FeedDate($this->pubDate);
+			$feed.= "        <pubDate>".htmlspecialchars($pubDate->rfc822())."</pubDate>\n";
+		}
+		if ($this->category!="") {
+			$feed.= "        <category>".htmlspecialchars($this->category)."</category>\n";
+		}
+		if ($this->docs!="") {
+			$feed.= "        <docs>".FeedCreator::iTrunc(htmlspecialchars($this->docs),500)."</docs>\n";
+		}
+		if ($this->ttl!="") {
+			$feed.= "        <ttl>".htmlspecialchars($this->ttl)."</ttl>\n";
+		}
+		if ($this->rating!="") {
+			$feed.= "        <rating>".FeedCreator::iTrunc(htmlspecialchars($this->rating),500)."</rating>\n";
+		}
+		if ($this->skipHours!="") {
+			$feed.= "        <skipHours>".htmlspecialchars($this->skipHours)."</skipHours>\n";
+		}
+		if ($this->skipDays!="") {
+			$feed.= "        <skipDays>".htmlspecialchars($this->skipDays)."</skipDays>\n";
+		}
+		$feed.= $this->_createAdditionalElements($this->additionalElements, "    ");
+
+		for ($i=0;$i<count($this->items);$i++) {
+			$feed.= "        <item>\n";
+			$feed.= "            <title>".FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)),100)."</title>\n";
+			$feed.= "            <link>".htmlspecialchars($this->items[$i]->link)."</link>\n";
+			$feed.= "            <description>".$this->items[$i]->getDescription()."</description>\n";
+			
+			if ($this->items[$i]->author!="") {
+				$feed.= "            <author>".htmlspecialchars($this->items[$i]->author)."</author>\n";
+			}
+			/*
+			// on hold
+			if ($this->items[$i]->source!="") {
+					$feed.= "            <source>".htmlspecialchars($this->items[$i]->source)."</source>\n";
+			}
+			*/
+			if ($this->items[$i]->category!="") {
+				$feed.= "            <category>".htmlspecialchars($this->items[$i]->category)."</category>\n";
+			}
+			if ($this->items[$i]->comments!="") {
+				$feed.= "            <comments>".htmlspecialchars($this->items[$i]->comments)."</comments>\n";
+			}
+			if ($this->items[$i]->date!="") {
+			$itemDate = new FeedDate($this->items[$i]->date);
+				$feed.= "            <pubDate>".htmlspecialchars($itemDate->rfc822())."</pubDate>\n";
+			}
+			if ($this->items[$i]->guid!="") {
+				$feed.= "            <guid>".htmlspecialchars($this->items[$i]->guid)."</guid>\n";
+			}
+			$feed.= $this->_createAdditionalElements($this->items[$i]->additionalElements, "        ");
+			$feed.= "        </item>\n";
+		}
+		$feed.= "    </channel>\n";
+		$feed.= "</rss>\n";
+		return $feed;
+	}
+}
+
+
+
+/**
+ * RSSCreator20 is a FeedCreator that implements RDF Site Summary (RSS) 2.0.
+ *
+ * @see http://backend.userland.com/rss
+ * @since 1.3
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ */
+class RSSCreator20 extends RSSCreator091 {
+
+    function RSSCreator20() {
+        parent::_setRSSVersion("2.0");
+    }
+    
+}
+
+
+/**
+ * PIECreator01 is a FeedCreator that implements the emerging PIE specification,
+ * as in http://intertwingly.net/wiki/pie/Syntax.
+ *
+ * @deprecated
+ * @since 1.3
+ * @author Scott Reynen <scott@randomchaos.com> and Kai Blankenhorn <kaib@bitfolge.de>
+ */
+class PIECreator01 extends FeedCreator {
+	
+	function PIECreator01() {
+		$this->encoding = "utf-8";
+	}
+    
+	function createFeed() {
+		$feed = "<?xml version=\"1.0\" encoding=\"".$this->encoding."\"?>\n";
+		$feed.= $this->_createStylesheetReferences();
+		$feed.= "<feed version=\"0.1\" xmlns=\"http://example.com/newformat#\">\n"; 
+		$feed.= "    <title>".FeedCreator::iTrunc(htmlspecialchars($this->title),100)."</title>\n";
+		$this->truncSize = 500;
+		$feed.= "    <subtitle>".$this->getDescription()."</subtitle>\n";
+		$feed.= "    <link>".$this->link."</link>\n";
+		for ($i=0;$i<count($this->items);$i++) {
+			$feed.= "    <entry>\n";
+			$feed.= "        <title>".FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)),100)."</title>\n";
+			$feed.= "        <link>".htmlspecialchars($this->items[$i]->link)."</link>\n";
+			$itemDate = new FeedDate($this->items[$i]->date);
+			$feed.= "        <created>".htmlspecialchars($itemDate->iso8601())."</created>\n";
+			$feed.= "        <issued>".htmlspecialchars($itemDate->iso8601())."</issued>\n";
+			$feed.= "        <modified>".htmlspecialchars($itemDate->iso8601())."</modified>\n";
+			$feed.= "        <id>".htmlspecialchars($this->items[$i]->guid)."</id>\n";
+			if ($this->items[$i]->author!="") {
+				$feed.= "        <author>\n";
+				$feed.= "            <name>".htmlspecialchars($this->items[$i]->author)."</name>\n";
+				if ($this->items[$i]->authorEmail!="") {
+					$feed.= "            <email>".$this->items[$i]->authorEmail."</email>\n";
+				}
+				$feed.="        </author>\n";
+			}
+			$feed.= "        <content type=\"text/html\" xml:lang=\"en-us\">\n";
+			$feed.= "            <div xmlns=\"http://www.w3.org/1999/xhtml\">".$this->items[$i]->getDescription()."</div>\n";
+			$feed.= "        </content>\n";
+			$feed.= "    </entry>\n";
+		}
+		$feed.= "</feed>\n";
+		return $feed;
+	}
+}
+
+
+/**
+ * AtomCreator03 is a FeedCreator that implements the atom specification,
+ * as in http://www.intertwingly.net/wiki/pie/FrontPage.
+ * Please note that just by using AtomCreator03 you won't automatically
+ * produce valid atom files. For example, you have to specify either an editor
+ * for the feed or an author for every single feed item.
+ *
+ * Some elements have not been implemented yet. These are (incomplete list):
+ * author URL, item author's email and URL, item contents, alternate links, 
+ * other link content types than text/html. Some of them may be created with
+ * AtomCreator03::additionalElements.
+ *
+ * @see FeedCreator#additionalElements
+ * @since 1.6
+ * @author Kai Blankenhorn <kaib@bitfolge.de>, Scott Reynen <scott@randomchaos.com>
+ */
+class AtomCreator03 extends FeedCreator {
+
+	function AtomCreator03() {
+		$this->contentType = "application/atom+xml";
+		$this->encoding = "utf-8";
+	}
+	
+	function createFeed() {
+		$feed = "<?xml version=\"1.0\" encoding=\"".$this->encoding."\"?>\n";
+		$feed.= $this->_createGeneratorComment();
+		$feed.= $this->_createStylesheetReferences();
+		$feed.= "<feed version=\"0.3\" xmlns=\"http://purl.org/atom/ns#\"";
+		if ($this->language!="") {
+			$feed.= " xml:lang=\"".$this->language."\"";
+		}
+		$feed.= ">\n"; 
+		$feed.= "    <title>".htmlspecialchars($this->title)."</title>\n";
+		$feed.= "    <tagline>".htmlspecialchars($this->description)."</tagline>\n";
+		$feed.= "    <link rel=\"alternate\" type=\"text/html\" href=\"".htmlspecialchars($this->link)."\"/>\n";
+		$feed.= "    <id>".htmlspecialchars($this->link)."</id>\n";
+		$now = new FeedDate();
+		$feed.= "    <modified>".htmlspecialchars($now->iso8601())."</modified>\n";
+		if ($this->editor!="") {
+			$feed.= "    <author>\n";
+			$feed.= "        <name>".$this->editor."</name>\n";
+			if ($this->editorEmail!="") {
+				$feed.= "        <email>".$this->editorEmail."</email>\n";
+			}
+			$feed.= "    </author>\n";
+		}
+		$feed.= "    <generator>".FEEDCREATOR_VERSION."</generator>\n";
+		$feed.= $this->_createAdditionalElements($this->additionalElements, "    ");
+		for ($i=0;$i<count($this->items);$i++) {
+			$feed.= "    <entry>\n";
+			$feed.= "        <title>".htmlspecialchars(strip_tags($this->items[$i]->title))."</title>\n";
+			$feed.= "        <link rel=\"alternate\" type=\"text/html\" href=\"".htmlspecialchars($this->items[$i]->link)."\"/>\n";
+			if ($this->items[$i]->date=="") {
+				$this->items[$i]->date = time();
+			}
+			$itemDate = new FeedDate($this->items[$i]->date);
+			$feed.= "        <created>".htmlspecialchars($itemDate->iso8601())."</created>\n";
+			$feed.= "        <issued>".htmlspecialchars($itemDate->iso8601())."</issued>\n";
+			$feed.= "        <modified>".htmlspecialchars($itemDate->iso8601())."</modified>\n";
+			$feed.= "        <id>".htmlspecialchars($this->items[$i]->link)."</id>\n";
+			$feed.= $this->_createAdditionalElements($this->items[$i]->additionalElements, "        ");
+			if ($this->items[$i]->author!="") {
+				$feed.= "        <author>\n";
+				$feed.= "            <name>".htmlspecialchars($this->items[$i]->author)."</name>\n";
+				$feed.= "        </author>\n";
+			}
+			if ($this->items[$i]->description!="") {
+				$feed.= "        <summary>".htmlspecialchars($this->items[$i]->description)."</summary>\n";
+			}
+			$feed.= "    </entry>\n";
+		}
+		$feed.= "</feed>\n";
+		return $feed;
+	}
+}
+
+
+/**
+ * MBOXCreator is a FeedCreator that implements the mbox format
+ * as described in http://www.qmail.org/man/man5/mbox.html
+ *
+ * @since 1.3
+ * @author Kai Blankenhorn <kaib@bitfolge.de>
+ */
+class MBOXCreator extends FeedCreator {
+
+	function MBOXCreator() {
+		$this->contentType = "text/plain";
+		$this->encoding = "ISO-8859-15";
+	}
+    
+	function qp_enc($input = "", $line_max = 76) { 
+		$hex = array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'); 
+		$lines = preg_split("/(?:\r\n|\r|\n)/", $input); 
+		$eol = "\r\n"; 
+		$escape = "="; 
+		$output = ""; 
+		while( list(, $line) = each($lines) ) { 
+			//$line = rtrim($line); // remove trailing white space -> no =20\r\n necessary 
+			$linlen = strlen($line); 
+			$newline = ""; 
+			for($i = 0; $i < $linlen; $i++) { 
+				$c = substr($line, $i, 1); 
+				$dec = ord($c); 
+				if ( ($dec == 32) && ($i == ($linlen - 1)) ) { // convert space at eol only 
+					$c = "=20"; 
+				} elseif ( ($dec == 61) || ($dec < 32 ) || ($dec > 126) ) { // always encode "\t", which is *not* required 
+					$h2 = floor($dec/16); $h1 = floor($dec%16); 
+					$c = $escape.$hex["$h2"].$hex["$h1"]; 
+				} 
+				if ( (strlen($newline) + strlen($c)) >= $line_max ) { // CRLF is not counted 
+					$output .= $newline.$escape.$eol; // soft line break; " =\r\n" is okay 
+					$newline = ""; 
+				} 
+				$newline .= $c; 
+			} // end of for 
+			$output .= $newline.$eol; 
+		} 
+		return trim($output); 
+	}
+	
+
+	/**
+	 * Builds the MBOX contents.
+	 * @return    string    the feed's complete text 
+	 */
+	function createFeed() {
+		for ($i=0;$i<count($this->items);$i++) {
+			if ($this->items[$i]->author!="") {
+				$from = $this->items[$i]->author;
+			} else {
+				$from = $this->title;
+			}
+			$itemDate = new FeedDate($this->items[$i]->date);
+			$feed.= "From ".strtr(MBOXCreator::qp_enc($from)," ","_")." ".date("D M d H:i:s Y",$itemDate->unix())."\n";
+			$feed.= "Content-Type: text/plain;\n";
+			$feed.= "	charset=\"".$this->encoding."\"\n";
+			$feed.= "Content-Transfer-Encoding: quoted-printable\n";
+			$feed.= "Content-Type: text/plain\n";
+			$feed.= "From: \"".MBOXCreator::qp_enc($from)."\"\n";
+			$feed.= "Date: ".$itemDate->rfc822()."\n";
+			$feed.= "Subject: ".MBOXCreator::qp_enc(FeedCreator::iTrunc($this->items[$i]->title,100))."\n";
+			$feed.= "\n";
+			$body = chunk_split(MBOXCreator::qp_enc($this->items[$i]->description));
+			$feed.= preg_replace("~\nFrom ([^\n]*)(\n?)~","\n>From $1$2\n",$body);
+			$feed.= "\n";
+			$feed.= "\n";
+		}
+		return $feed;
+	}
+	
+	/**
+	 * Generate a filename for the feed cache file. Overridden from FeedCreator to prevent XML data types.
+	 * @return string the feed cache filename
+	 * @since 1.4
+	 * @access private
+	 */
+	function _generateFilename() {
+		$fileInfo = pathinfo($_SERVER["PHP_SELF"]);
+		return substr($fileInfo["basename"],0,-(strlen($fileInfo["extension"])+1)).".mbox";
+	}
+}
+
+
+/**
+ * OPMLCreator is a FeedCreator that implements OPML 1.0.
+ * 
+ * @see http://opml.scripting.com/spec
+ * @author Dirk Clemens, Kai Blankenhorn
+ * @since 1.5
+ */
+class OPMLCreator extends FeedCreator {
+
+	function OPMLCreator() {
+		$this->encoding = "utf-8";
+	}
+    
+	function createFeed() {     
+		$feed = "<?xml version=\"1.0\" encoding=\"".$this->encoding."\"?>\n";
+		$feed.= $this->_createGeneratorComment();
+		$feed.= $this->_createStylesheetReferences();
+		$feed.= "<opml xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n";
+		$feed.= "    <head>\n";
+		$feed.= "        <title>".htmlspecialchars($this->title)."</title>\n";
+		if ($this->pubDate!="") {
+			$date = new FeedDate($this->pubDate);
+			$feed.= "         <dateCreated>".$date->rfc822()."</dateCreated>\n";
+		}
+		if ($this->lastBuildDate!="") {
+			$date = new FeedDate($this->lastBuildDate);
+			$feed.= "         <dateModified>".$date->rfc822()."</dateModified>\n";
+		}
+		if ($this->editor!="") {
+			$feed.= "         <ownerName>".$this->editor."</ownerName>\n";
+		}
+		if ($this->editorEmail!="") {
+			$feed.= "         <ownerEmail>".$this->editorEmail."</ownerEmail>\n";
+		}
+		$feed.= "    </head>\n";
+		$feed.= "    <body>\n";
+		for ($i=0;$i<count($this->items);$i++) {
+			$feed.= "    <outline type=\"rss\" ";
+			$title = htmlspecialchars(strip_tags(strtr($this->items[$i]->title,"\n\r","  ")));
+			$feed.= " title=\"".$title."\"";
+			$feed.= " text=\"".$title."\"";
+			//$feed.= " description=\"".htmlspecialchars($this->items[$i]->description)."\"";
+			$feed.= " url=\"".htmlspecialchars($this->items[$i]->link)."\"";
+			$feed.= "/>\n";
+		}
+		$feed.= "    </body>\n";
+		$feed.= "</opml>\n";
+		return $feed;
+	}
+}
+
+
+
+/**
+ * HTMLCreator is a FeedCreator that writes an HTML feed file to a specific 
+ * location, overriding the createFeed method of the parent FeedCreator.
+ * The HTML produced can be included over http by scripting languages, or serve
+ * as the source for an IFrame.
+ * All output by this class is embedded in <div></div> tags to enable formatting
+ * using CSS. 
+ *
+ * @author Pascal Van Hecke
+ * @since 1.7
+ */
+class HTMLCreator extends FeedCreator {
+
+	var $contentType = "text/html";
+	
+	/**
+	 * Contains HTML to be output at the start of the feed's html representation.
+	 */
+	var $header;
+	
+	/**
+	 * Contains HTML to be output at the end of the feed's html representation.
+	 */
+	var $footer ;
+	
+	/**
+	 * Contains HTML to be output between entries. A separator is only used in 
+	 * case of multiple entries.
+	 */
+	var $separator;
+	
+	/**
+	 * Used to prefix the stylenames to make sure they are unique 
+	 * and do not clash with stylenames on the users' page.
+	 */
+	var $stylePrefix;
+	
+	/**
+	 * Determines whether the links open in a new window or not.
+	 */
+	var $openInNewWindow = true;
+	
+	var $imageAlign ="right";
+	
+	/**
+	 * In case of very simple output you may want to get rid of the style tags,
+	 * hence this variable.  There's no equivalent on item level, but of course you can 
+	 * add strings to it while iterating over the items ($this->stylelessOutput .= ...)
+	 * and when it is non-empty, ONLY the styleless output is printed, the rest is ignored
+	 * in the function createFeed().
+	 */
+	var $stylelessOutput ="";
+
+	/**
+	 * Writes the HTML.
+	 * @return    string    the scripts's complete text 
+	 */
+	function createFeed() {
+		// if there is styleless output, use the content of this variable and ignore the rest
+		if ($this->stylelessOutput!="") {
+			return $this->stylelessOutput;
+		}
+		
+		//if no stylePrefix is set, generate it yourself depending on the script name
+		if ($this->stylePrefix=="") {
+			$this->stylePrefix = str_replace(".", "_", $this->_generateFilename())."_";
+		}
+
+		//set an openInNewWindow_token_to be inserted or not
+		if ($this->openInNewWindow) {
+			$targetInsert = " target='_blank'";
+		}
+		
+		// use this array to put the lines in and implode later with "document.write" javascript
+		$feedArray = array();
+		if ($this->image!=null) {
+			$imageStr = "<a href='".$this->image->link."'".$targetInsert.">".
+							"<img src='".$this->image->url."' border='0' alt='".
+							FeedCreator::iTrunc(htmlspecialchars($this->image->title),100).
+							"' align='".$this->imageAlign."' ";
+			if ($this->image->width) {
+				$imageStr .=" width='".$this->image->width. "' ";
+			}
+			if ($this->image->height) {
+				$imageStr .=" height='".$this->image->height."' ";
+			}
+			$imageStr .="/></a>";
+			$feedArray[] = $imageStr;
+		}
+		
+		if ($this->title) {
+			$feedArray[] = "<div class='".$this->stylePrefix."title'><a href='".$this->link."' ".$targetInsert." class='".$this->stylePrefix."title'>".
+				FeedCreator::iTrunc(htmlspecialchars($this->title),100)."</a></div>";
+		}
+		if ($this->getDescription()) {
+			$feedArray[] = "<div class='".$this->stylePrefix."description'>".
+				str_replace("]]>", "", str_replace("<![CDATA[", "", $this->getDescription())).
+				"</div>";
+		}
+		
+		if ($this->header) {
+			$feedArray[] = "<div class='".$this->stylePrefix."header'>".$this->header."</div>";
+		}
+		
+		for ($i=0;$i<count($this->items);$i++) {
+			if ($this->separator and $i > 0) {
+				$feedArray[] = "<div class='".$this->stylePrefix."separator'>".$this->separator."</div>";
+			}
+			
+			if ($this->items[$i]->title) {
+				if ($this->items[$i]->link) {
+					$feedArray[] = 
+						"<div class='".$this->stylePrefix."item_title'><a href='".$this->items[$i]->link."' class='".$this->stylePrefix.
+						"item_title'".$targetInsert.">".FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)),100).
+						"</a></div>";
+				} else {
+					$feedArray[] = 
+						"<div class='".$this->stylePrefix."item_title'>".
+						FeedCreator::iTrunc(htmlspecialchars(strip_tags($this->items[$i]->title)),100).
+						"</div>";
+				}
+			}
+			if ($this->items[$i]->getDescription()) {
+				$feedArray[] = 
+				"<div class='".$this->stylePrefix."item_description'>".
+					str_replace("]]>", "", str_replace("<![CDATA[", "", $this->items[$i]->getDescription())).
+					"</div>";
+			}
+		}
+		if ($this->footer) {
+			$feedArray[] = "<div class='".$this->stylePrefix."footer'>".$this->footer."</div>";
+		}
+		
+		$feed= "".join($feedArray, "\r\n");
+		return $feed;
+	}
+    
+	/**
+	 * Overrrides parent to produce .html extensions
+	 *
+	 * @return string the feed cache filename
+	 * @since 1.4
+	 * @access private
+	 */
+	function _generateFilename() {
+		$fileInfo = pathinfo($_SERVER["PHP_SELF"]);
+		return substr($fileInfo["basename"],0,-(strlen($fileInfo["extension"])+1)).".html";
+	}
+}	
+
+
+/**
+ * JSCreator is a class that writes a js file to a specific 
+ * location, overriding the createFeed method of the parent HTMLCreator.
+ *
+ * @author Pascal Van Hecke
+ */
+class JSCreator extends HTMLCreator {
+	var $contentType = "text/javascript";
+	
+	/**
+	 * writes the javascript
+	 * @return    string    the scripts's complete text 
+	 */
+	function createFeed() 
+	{
+		$feed = parent::createFeed();
+		$feedArray = explode("\n",$feed);
+		
+		$jsFeed = "";
+		foreach ($feedArray as $value) {
+			$jsFeed .= "document.write('".trim(addslashes($value))."');\n";
+		}
+		return $jsFeed;
+	}
+    
+	/**
+	 * Overrrides parent to produce .js extensions
+	 *
+	 * @return string the feed cache filename
+	 * @since 1.4
+	 * @access private
+	 */
+	function _generateFilename() {
+		$fileInfo = pathinfo($_SERVER["PHP_SELF"]);
+		return substr($fileInfo["basename"],0,-(strlen($fileInfo["extension"])+1)).".js";
+	}
+	
+}	
+
+
+
+/*** TEST SCRIPT *********************************************************
+
+//include("feedcreator.class.php"); 
+
+$rss = new UniversalFeedCreator(); 
+$rss->useCached(); 
+$rss->title = "PHP news"; 
+$rss->description = "daily news from the PHP scripting world"; 
+
+//optional
+//$rss->descriptionTruncSize = 500;
+//$rss->descriptionHtmlSyndicated = true;
+//$rss->xslStyleSheet = "http://feedster.com/rss20.xsl";
+
+$rss->link = "http://www.dailyphp.net/news"; 
+$rss->feedURL = "http://www.dailyphp.net/".$PHP_SELF; 
+
+$image = new FeedImage(); 
+$image->title = "dailyphp.net logo"; 
+$image->url = "http://www.dailyphp.net/images/logo.gif"; 
+$image->link = "http://www.dailyphp.net"; 
+$image->description = "Feed provided by dailyphp.net. Click to visit."; 
+
+//optional
+$image->descriptionTruncSize = 500;
+$image->descriptionHtmlSyndicated = true;
+
+$rss->image = $image; 
+
+// get your news items from somewhere, e.g. your database: 
+//mysql_select_db($dbHost, $dbUser, $dbPass); 
+//$res = mysql_query("SELECT * FROM news ORDER BY newsdate DESC"); 
+//while ($data = mysql_fetch_object($res)) { 
+	$item = new FeedItem(); 
+	$item->title = "This is an the test title of an item"; 
+	$item->link = "http://localhost/item/"; 
+	$item->description = "<b>description in </b><br/>HTML"; 
+	
+	//optional
+	//item->descriptionTruncSize = 500;
+	$item->descriptionHtmlSyndicated = true;
+	
+	$item->date = time(); 
+	$item->source = "http://www.dailyphp.net"; 
+	$item->author = "John Doe"; 
+	 
+	$rss->addItem($item); 
+//} 
+
+// valid format strings are: RSS0.91, RSS1.0, RSS2.0, PIE0.1, MBOX, OPML, ATOM0.3, HTML, JS
+echo $rss->saveFeed("RSS0.91", "feed.xml"); 
+
+
+
+***************************************************************************/
+
+?>
diff --git a/functions.php b/functions.php
index 8b13bed98..97ad0c6c4 100644
--- a/functions.php
+++ b/functions.php
@@ -19,6 +19,8 @@
 		require_once 'simplepie/simplepie.inc';
 	}
 
+	require_once "feedcreator.class.php";
+
 	define('MAGPIE_OUTPUT_ENCODING', 'UTF-8');
 
 	function purge_feed($link, $feed_id, $purge_interval, $debug = false) {
@@ -2360,7 +2362,7 @@
 	}
 
 	function generate_syndicated_feed($link, $feed, $is_cat,
-		$search, $search_mode, $match_on) {
+		$search, $search_mode, $match_on, $output_format = "RSS2.0") {
 
 		$qfh_ret = queryFeedHeadlines($link, $feed, 
 				30, false, $is_cat, $search, $search_mode, $match_on, "updated DESC");
@@ -2370,31 +2372,23 @@
 		$feed_site_url = $qfh_ret[2];
 		$last_error = $qfh_ret[3];
 
-		print "<rss version=\"2.0\">
-			<channel>
-			<title>$feed_title</title>
-			<link>$feed_site_url</link>
-			<generator>Tiny Tiny RSS v".VERSION."</generator>";
+		$rss = new UniversalFeedCreator();
+
+		$rss->title = $feed_title;
+		$rss->link = $feed_site_url;
 
 		while ($line = db_fetch_assoc($result)) {
-			print "<item>";
-			print "<id>" . htmlspecialchars($line["guid"]) . "</id>";
-			print "<link>" . htmlspecialchars($line["link"]) . "</link>";
 
-			$rfc822_date = date('r', strtotime($line["updated"]));
+			$item = new FeedItem();
+			$item->title = $line["title"];
+			$item->description = $line["content_preview"];
+			$item->date = strtotime($line["updated"]);
+			$item->id = $line["guid"];
 
-			print "<pubDate>$rfc822_date</pubDate>";
-
-			print "<title>" . 
-				htmlspecialchars($line["title"]) . "</title>";
-
-			print "<description>" . 
-				htmlspecialchars($line["content_preview"]) . "</description>";
-
-			print "</item>";
+			$rss->addItem($item);
 		}
 
-		print "</channel></rss>";
+		print $rss->createFeed($output_format);
 
 	}