PHP生成RSS类 (PHP)

by dzjzmj, Saturday, June 21, 2008, 13:32

<?php
/**
 * rss操作类
 *
 * FeedCreator class v1.7.2
 * originally (c) Kai Blankenhorn
 * www.bitfolge.de
 * kaib@bitfolge.de
 *
 */

// your local timezone, set to "" to disable or for GMT
define("TIME_ZONE","");

/**
 * Version string.
 **/
define("FEEDCREATOR_VERSION", "www.273.cn");

/**
 * 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 "0.91":
				// fall through
			case "RSS0.91":
				$this->_feed = new RSSCreator091();
				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 = "utf-8";
	
	
	/**
	 * 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.

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PHP生成RSS类

使用：
include_once('Rss.class.php');
$rss = new UniversalFeedCreator();
$rss->title = "PHP开源项目";
$rss->link = "http://www.coderhome.net";
$rss->description = "最全最新最丰富的PHP开源项目";
$softList = $query->select('select * from soft_list where status=1 order by id desc','array',1,100);
foreach ($softList as $rs) {
$item = new FeedItem();
$item->title = $rs['title'];
$item->link = 'http://www.coderhome.net/?id='.$rs['id'];
$item->description = $rs['content'];
$rss->addItem($item);
}
$rss->saveFeed("RSS2.0", "rss.xml");

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PHP生成RSS类 - dzjzmj, 2008-06-21, 13:32 (PHP)

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PHP生成RSS类 (PHP)