/wp-includes/library/Simplepie/Feed.php

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<?php
/**
 * Simplepie
 *
 * A PHP-Based RSS and Atom Feed Framework.
 * Takes the hard work out of managing a complete RSS/Atom solution.
 *
 * Copyright (c) 2004-2011, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 	* Redistributions of source code must retain the above copyright notice, this list of
 * 	  conditions and the following disclaimer.
 *
 * 	* Redistributions in binary form must reproduce the above copyright notice, this list
 * 	  of conditions and the following disclaimer in the documentation and/or other materials
 * 	  provided with the distribution.
 *
 * 	* Neither the name of the Simplepie Team nor the names of its contributors may be used
 * 	  to endorse or promote products derived from this software without specific prior
 * 	  written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package Simplepie
 * @version 1.2.1
 * @copyright 2004-2011 Ryan Parman, Geoffrey Sneddon, Ryan McCue
 * @author Ryan Parman
 * @author Geoffrey Sneddon
 * @author Ryan McCue
 * @link http://simplepie.org/ Simplepie
 * @link http://simplepie.org/support/ Please submit all bug reports and feature requests to the Simplepie forums
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
 * @todo phpDoc comments
 */

/* This is here for the constants. Remove in stand-alone version. */
require_once(ABSPATH . WPINC . '/class-simplepie.php');

/**
 * Simplepie
 *
 * @package Simplepie
 */
class Simplepie_Feed {
	/**
	 * @var array Raw data
	 * @access private
	 */
	var $data = array();

	/**
	 * @var mixed Error string
	 * @access private
	 */
	var $error;

	/**
	 * @var object Instance of Simplepie_Sanitize (or other class)
	 * @see Simplepie::set_sanitize_class()
	 * @access private
	 */
	var $sanitize;

	/**
	 * @var string Simplepie Useragent
	 * @see Simplepie::set_useragent()
	 * @access private
	 */
	var $useragent = SIMPLEPIE_USERAGENT;

	/**
	 * @var string Feed URL
	 * @see Simplepie::set_feed_url()
	 * @access private
	 */
	var $feed_url;

	/**
	 * @var object Instance of Simplepie_File to use as a feed
	 * @see Simplepie::set_file()
	 * @access private
	 */
	var $file;

	/**
	 * @var string Raw feed data
	 * @see Simplepie::set_raw_data()
	 * @access private
	 */
	var $raw_data;

	/**
	 * @var int Timeout for fetching remote files
	 * @see Simplepie::set_timeout()
	 * @access private
	 */
	var $timeout = 10;

	/**
	 * @var bool Forces fsockopen() to be used for remote files instead
	 * of cURL, even if a new enough version is installed
	 * @see Simplepie::force_fsockopen()
	 * @access private
	 */
	var $force_fsockopen = false;

	/**
	 * @var bool Force the given data/URL to be treated as a feed no matter what
	 * it appears like
	 * @see Simplepie::force_feed()
	 * @access private
	 */
	var $force_feed = false;

	/**
	 * @var bool Enable/Disable XML dump
	 * @see Simplepie::enable_xml_dump()
	 * @access private
	 */
	var $xml_dump = false;

	/**
	 * @var bool Enable/Disable Caching
	 * @see Simplepie::enable_cache()
	 * @access private
	 */
	var $cache = true;

	/**
	 * @var int Cache duration (in seconds)
	 * @see Simplepie::set_cache_duration()
	 * @access private
	 */
	var $cache_duration = 3600;

	/**
	 * @var int Auto-discovery cache duration (in seconds)
	 * @see Simplepie::set_autodiscovery_cache_duration()
	 * @access private
	 */
	var $autodiscovery_cache_duration = 604800; // 7 Days.

	/**
	 * @var string Cache location (relative to executing script)
	 * @see Simplepie::set_cache_location()
	 * @access private
	 */
	var $cache_location = './cache';

	/**
	 * @var string Function that creates the cache filename
	 * @see Simplepie::set_cache_name_function()
	 * @access private
	 */
	var $cache_name_function = 'md5';

	/**
	 * @var bool Reorder feed by date descending
	 * @see Simplepie::enable_order_by_date()
	 * @access private
	 */
	var $order_by_date = true;

	/**
	 * @var mixed Force input encoding to be set to the follow value
	 * (false, or anything type-cast to false, disables this feature)
	 * @see Simplepie::set_input_encoding()
	 * @access private
	 */
	var $input_encoding = false;

	/**
	 * @var int Feed Autodiscovery Level
	 * @see Simplepie::set_autodiscovery_level()
	 * @access private
	 */
	var $autodiscovery = SIMPLEPIE_LOCATOR_ALL;

	/**
	 * @var string Class used for caching feeds
	 * @see Simplepie::set_cache_class()
	 * @access private
	 */
	var $cache_class = 'Simplepie_Cache';

	/**
	 * @var string Class used for locating feeds
	 * @see Simplepie::set_locator_class()
	 * @access private
	 */
	var $locator_class = 'Simplepie_Locator';

	/**
	 * @var string Class used for parsing feeds
	 * @see Simplepie::set_parser_class()
	 * @access private
	 */
	var $parser_class = 'Simplepie_Parser';

	/**
	 * @var string Class used for fetching feeds
	 * @see Simplepie::set_file_class()
	 * @access private
	 */
	var $file_class = 'Simplepie_File';

	/**
	 * @var string Class used for items
	 * @see Simplepie::set_item_class()
	 * @access private
	 */
	var $item_class = 'Simplepie_Item';

	/**
	 * @var string Class used for authors
	 * @see Simplepie::set_author_class()
	 * @access private
	 */
	var $author_class = 'Simplepie_Author';

	/**
	 * @var string Class used for categories
	 * @see Simplepie::set_category_class()
	 * @access private
	 */
	var $category_class = 'Simplepie_Category';

	/**
	 * @var string Class used for enclosures
	 * @see Simplepie::set_enclosures_class()
	 * @access private
	 */
	var $enclosure_class = 'Simplepie_Enclosure';

	/**
	 * @var string Class used for Media RSS <media:text> captions
	 * @see Simplepie::set_caption_class()
	 * @access private
	 */
	var $caption_class = 'Simplepie_Caption';

	/**
	 * @var string Class used for Media RSS <media:copyright>
	 * @see Simplepie::set_copyright_class()
	 * @access private
	 */
	var $copyright_class = 'Simplepie_Copyright';

	/**
	 * @var string Class used for Media RSS <media:credit>
	 * @see Simplepie::set_credit_class()
	 * @access private
	 */
	var $credit_class = 'Simplepie_Credit';

	/**
	 * @var string Class used for Media RSS <media:rating>
	 * @see Simplepie::set_rating_class()
	 * @access private
	 */
	var $rating_class = 'Simplepie_Rating';

	/**
	 * @var string Class used for Media RSS <media:restriction>
	 * @see Simplepie::set_restriction_class()
	 * @access private
	 */
	var $restriction_class = 'Simplepie_Restriction';

	/**
	 * @var string Class used for content-type sniffing
	 * @see Simplepie::set_content_type_sniffer_class()
	 * @access private
	 */
	var $content_type_sniffer_class = 'Simplepie_Content_Type_Sniffer';

	/**
	 * @var string Class used for item sources.
	 * @see Simplepie::set_source_class()
	 * @access private
	 */
	var $source_class = 'Simplepie_Source';

	/**
	 * @var mixed Set javascript query string parameter (false, or
	 * anything type-cast to false, disables this feature)
	 * @see Simplepie::set_javascript()
	 * @access private
	 */
	var $javascript = 'js';

	/**
	 * @var int Maximum number of feeds to check with autodiscovery
	 * @see Simplepie::set_max_checked_feeds()
	 * @access private
	 */
	var $max_checked_feeds = 10;

	/**
	 * @var array All the feeds found during the autodiscovery process
	 * @see Simplepie::get_all_discovered_feeds()
	 * @access private
	 */
	var $all_discovered_feeds = array();

	/**
	 * @var string Web-accessible path to the handler_favicon.php file.
	 * @see Simplepie::set_favicon_handler()
	 * @access private
	 */
	var $favicon_handler = '';

	/**
	 * @var string Web-accessible path to the handler_image.php file.
	 * @see Simplepie::set_image_handler()
	 * @access private
	 */
	var $image_handler = '';

	/**
	 * @var array Stores the URLs when multiple feeds are being initialized.
	 * @see Simplepie::set_feed_url()
	 * @access private
	 */
	var $multifeed_url = array();

	/**
	 * @var array Stores Simplepie objects when multiple feeds initialized.
	 * @access private
	 */
	var $multifeed_objects = array();

	/**
	 * @var array Stores the get_object_vars() array for use with multifeeds.
	 * @see Simplepie::set_feed_url()
	 * @access private
	 */
	var $config_settings = null;

	/**
	 * @var integer Stores the number of items to return per-feed with multifeeds.
	 * @see Simplepie::set_item_limit()
	 * @access private
	 */
	var $item_limit = 0;

	/**
	 * @var array Stores the default attributes to be stripped by strip_attributes().
	 * @see Simplepie::strip_attributes()
	 * @access private
	 */
	var $strip_attributes = array('bgsound', 'class', 'expr', 'id', 'style', 'onclick', 'onerror', 'onfinish', 'onmouseover', 'onmouseout', 'onfocus', 'onblur', 'lowsrc', 'dynsrc');

	/**
	 * @var array Stores the default tags to be stripped by strip_htmltags().
	 * @see Simplepie::strip_htmltags()
	 * @access private
	 */
	var $strip_htmltags = array('base', 'blink', 'body', 'doctype', 'embed', 'font', 'form', 'frame', 'frameset', 'html', 'iframe', 'input', 'marquee', 'meta', 'noscript', 'object', 'param', 'script', 'style');

	/**
	 * The Simplepie class contains feed level data and options
	 *
	 * There are two ways that you can create a new Simplepie object. The first
	 * is by passing a feed URL as a parameter to the Simplepie constructor
	 * (as well as optionally setting the cache location and cache expiry). This
	 * will initialise the whole feed with all of the default settings, and you
	 * can begin accessing methods and properties immediately.
	 *
	 * The second way is to create the Simplepie object with no parameters
	 * at all. This will enable you to set configuration options. After setting
	 * them, you must initialise the feed using $feed->init(). At that point the
	 * object's methods and properties will be available to you. This format is
	 * what is used throughout this documentation.
	 *
	 * @access public
	 * @since 1.0 Preview Release
	 * @param string $feed_url This is the URL you want to parse.
	 * @param string $cache_location This is where you want the cache to be stored.
	 * @param int $cache_duration This is the number of seconds that you want to store the cache file for.
	 */
	function Simplepie_Feed($feed_url = null, $cache_location = null, $cache_duration = null) {
		// Other objects, instances created here so we can set options on them
		$this->sanitize = new Simplepie_Sanitize;
                
                // Adapted for Mage Modules
                $this->_construct();

		// Set options if they're passed to the constructor
		if ($cache_location !== null)
		{
			$this->set_cache_location($cache_location);
		}

		if ($cache_duration !== null)
		{
			$this->set_cache_duration($cache_duration);
		}

		// Only init the script if we're passed a feed URL
		if ($feed_url !== null)
		{
			$this->set_feed_url($feed_url);
			$this->init();
		}
	}
        
        protected function _construct() {
            
        }

	/**
	 * Used for converting object to a string
	 */
	function __toString()
	{
		return md5(serialize($this->data));
	}

	/**
	 * Remove items that link back to this before destroying this object
	 */
	function __destruct()
	{
		if ((version_compare(PHP_VERSION, '5.3', '<') || !gc_enabled()) && !ini_get('zend.ze1_compatibility_mode'))
		{
			if (!empty($this->data['items']))
			{
				foreach ($this->data['items'] as $item)
				{
					$item->__destruct();
				}
				unset($item, $this->data['items']);
			}
			if (!empty($this->data['ordered_items']))
			{
				foreach ($this->data['ordered_items'] as $item)
				{
					$item->__destruct();
				}
				unset($item, $this->data['ordered_items']);
			}
		}
	}

	/**
	 * Force the given data/URL to be treated as a feed no matter what it
	 * appears like
	 *
	 * @access public
	 * @since 1.1
	 * @param bool $enable Force the given data/URL to be treated as a feed
	 */
	function force_feed($enable = false)
	{
		$this->force_feed = (bool) $enable;
	}

	/**
	 * This is the URL of the feed you want to parse.
	 *
	 * This allows you to enter the URL of the feed you want to parse, or the
	 * website you want to try to use auto-discovery on. This takes priority
	 * over any set raw data.
	 *
	 * You can set multiple feeds to mash together by passing an array instead
	 * of a string for the $url. Remember that with each additional feed comes
	 * additional processing and resources.
	 *
	 * @access public
	 * @since 1.0 Preview Release
	 * @param mixed $url This is the URL (or array of URLs) that you want to parse.
	 * @see Simplepie::set_raw_data()
	 */
	function set_feed_url($url)
	{
		if (is_array($url))
		{
			$this->multifeed_url = array();
			foreach ($url as $value)
			{
				$this->multifeed_url[] = Simplepie_Misc::fix_protocol($value, 1);
			}
		}
		else
		{
			$this->feed_url = Simplepie_Misc::fix_protocol($url, 1);
		}
	}

	/**
	 * Provides an instance of Simplepie_File to use as a feed
	 *
	 * @access public
	 * @param object &$file Instance of Simplepie_File (or subclass)
	 * @return bool True on success, false on failure
	 */
	function set_file(&$file)
	{
		if (is_a($file, 'Simplepie_File'))
		{
			$this->feed_url = $file->url;
			$this->file =& $file;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to use a string of RSS/Atom data instead of a remote feed.
	 *
	 * If you have a feed available as a string in PHP, you can tell Simplepie
	 * to parse that data string instead of a remote feed. Any set feed URL
	 * takes precedence.
	 *
	 * @access public
	 * @since 1.0 Beta 3
	 * @param string $data RSS or Atom data as a string.
	 * @see Simplepie::set_feed_url()
	 */
	function set_raw_data($data)
	{
		$this->raw_data = $data;
	}

	/**
	 * Allows you to override the default timeout for fetching remote feeds.
	 *
	 * This allows you to change the maximum time the feed's server to respond
	 * and send the feed back.
	 *
	 * @access public
	 * @since 1.0 Beta 3
	 * @param int $timeout The maximum number of seconds to spend waiting to retrieve a feed.
	 */
	function set_timeout($timeout = 10)
	{
		$this->timeout = (int) $timeout;
	}

	/**
	 * Forces Simplepie to use fsockopen() instead of the preferred cURL
	 * functions.
	 *
	 * @access public
	 * @since 1.0 Beta 3
	 * @param bool $enable Force fsockopen() to be used
	 */
	function force_fsockopen($enable = false)
	{
		$this->force_fsockopen = (bool) $enable;
	}

	/**
	 * Outputs the raw XML content of the feed, after it has gone through
	 * Simplepie's filters.
	 *
	 * Used only for debugging, this function will output the XML content as
	 * text/xml. When Simplepie reads in a feed, it does a bit of cleaning up
	 * before trying to parse it. Many parts of the feed are re-written in
	 * memory, and in the end, you have a parsable feed. XML dump shows you the
	 * actual XML that Simplepie tries to parse, which may or may not be very
	 * different from the original feed.
	 *
	 * @access public
	 * @since 1.0 Preview Release
	 * @param bool $enable Enable XML dump
	 */
	function enable_xml_dump($enable = false)
	{
		$this->xml_dump = (bool) $enable;
	}

	/**
	 * Enables/disables caching in Simplepie.
	 *
	 * This option allows you to disable caching all-together in Simplepie.
	 * However, disabling the cache can lead to longer load times.
	 *
	 * @access public
	 * @since 1.0 Preview Release
	 * @param bool $enable Enable caching
	 */
	function enable_cache($enable = true)
	{
		$this->cache = (bool) $enable;
	}

	/**
	 * Set the length of time (in seconds) that the contents of a feed
	 * will be cached.
	 *
	 * @access public
	 * @param int $seconds The feed content cache duration.
	 */
	function set_cache_duration($seconds = 3600)
	{
		$this->cache_duration = (int) $seconds;
	}

	/**
	 * Set the length of time (in seconds) that the autodiscovered feed
	 * URL will be cached.
	 *
	 * @access public
	 * @param int $seconds The autodiscovered feed URL cache duration.
	 */
	function set_autodiscovery_cache_duration($seconds = 604800)
	{
		$this->autodiscovery_cache_duration = (int) $seconds;
	}

	/**
	 * Set the file system location where the cached files should be stored.
	 *
	 * @access public
	 * @param string $location The file system location.
	 */
	function set_cache_location($location = './cache')
	{
		$this->cache_location = (string) $location;
	}

	/**
	 * Determines whether feed items should be sorted into reverse chronological order.
	 *
	 * @access public
	 * @param bool $enable Sort as reverse chronological order.
	 */
	function enable_order_by_date($enable = true)
	{
		$this->order_by_date = (bool) $enable;
	}

	/**
	 * Allows you to override the character encoding reported by the feed.
	 *
	 * @access public
	 * @param string $encoding Character encoding.
	 */
	function set_input_encoding($encoding = false)
	{
		if ($encoding)
		{
			$this->input_encoding = (string) $encoding;
		}
		else
		{
			$this->input_encoding = false;
		}
	}

	/**
	 * Set how much feed autodiscovery to do
	 *
	 * @access public
	 * @see SIMPLEPIE_LOCATOR_NONE
	 * @see SIMPLEPIE_LOCATOR_AUTODISCOVERY
	 * @see SIMPLEPIE_LOCATOR_LOCAL_EXTENSION
	 * @see SIMPLEPIE_LOCATOR_LOCAL_BODY
	 * @see SIMPLEPIE_LOCATOR_REMOTE_EXTENSION
	 * @see SIMPLEPIE_LOCATOR_REMOTE_BODY
	 * @see SIMPLEPIE_LOCATOR_ALL
	 * @param int $level Feed Autodiscovery Level (level can be a
	 * combination of the above constants, see bitwise OR operator)
	 */
	function set_autodiscovery_level($level = SIMPLEPIE_LOCATOR_ALL)
	{
		$this->autodiscovery = (int) $level;
	}

	/**
	 * Allows you to change which class Simplepie uses for caching.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_cache_class($class = 'Simplepie_Cache')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Cache'))
		{
			$this->cache_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for auto-discovery.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_locator_class($class = 'Simplepie_Locator')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Locator'))
		{
			$this->locator_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for XML parsing.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_parser_class($class = 'Simplepie_Parser')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Parser'))
		{
			$this->parser_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for remote file fetching.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_file_class($class = 'Simplepie_File')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_File'))
		{
			$this->file_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for data sanitization.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_sanitize_class($class = 'Simplepie_Sanitize')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Sanitize'))
		{
			$this->sanitize = new $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for handling feed items.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_item_class($class = 'Simplepie_Item')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Item'))
		{
			$this->item_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for handling author data.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_author_class($class = 'Simplepie_Author')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Author'))
		{
			$this->author_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for handling category data.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_category_class($class = 'Simplepie_Category')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Category'))
		{
			$this->category_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for feed enclosures.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_enclosure_class($class = 'Simplepie_Enclosure')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Enclosure'))
		{
			$this->enclosure_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for <media:text> captions
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_caption_class($class = 'Simplepie_Caption')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Caption'))
		{
			$this->caption_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for <media:copyright>
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_copyright_class($class = 'Simplepie_Copyright')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Copyright'))
		{
			$this->copyright_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for <media:credit>
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_credit_class($class = 'Simplepie_Credit')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Credit'))
		{
			$this->credit_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for <media:rating>
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_rating_class($class = 'Simplepie_Rating')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Rating'))
		{
			$this->rating_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for <media:restriction>
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_restriction_class($class = 'Simplepie_Restriction')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Restriction'))
		{
			$this->restriction_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses for content-type sniffing.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_content_type_sniffer_class($class = 'Simplepie_Content_Type_Sniffer')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Content_Type_Sniffer'))
		{
			$this->content_type_sniffer_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to change which class Simplepie uses item sources.
	 * Useful when you are overloading or extending Simplepie's default classes.
	 *
	 * @access public
	 * @param string $class Name of custom class.
	 * @link http://php.net/manual/en/keyword.extends.php PHP4 extends documentation
	 * @link http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.extends PHP5 extends documentation
	 */
	function set_source_class($class = 'Simplepie_Source')
	{
		if (Simplepie_Misc::is_subclass_of($class, 'Simplepie_Source'))
		{
			$this->source_class = $class;
			return true;
		}
		return false;
	}

	/**
	 * Allows you to override the default user agent string.
	 *
	 * @access public
	 * @param string $ua New user agent string.
	 */
	function set_useragent($ua = SIMPLEPIE_USERAGENT)
	{
		$this->useragent = (string) $ua;
	}

	/**
	 * Set callback function to create cache filename with
	 *
	 * @access public
	 * @param mixed $function Callback function
	 */
	function set_cache_name_function($function = 'md5')
	{
		if (is_callable($function))
		{
			$this->cache_name_function = $function;
		}
	}

	/**
	 * Set javascript query string parameter
	 *
	 * @access public
	 * @param mixed $get Javascript query string parameter
	 */
	function set_javascript($get = 'js')
	{
		if ($get)
		{
			$this->javascript = (string) $get;
		}
		else
		{
			$this->javascript = false;
		}
	}

	/**
	 * Set options to make SP as fast as possible.  Forgoes a
	 * substantial amount of data sanitization in favor of speed.
	 *
	 * @access public
	 * @param bool $set Whether to set them or not
	 */
	function set_stupidly_fast($set = false)
	{
		if ($set)
		{
			$this->enable_order_by_date(false);
			$this->remove_div(false);
			$this->strip_comments(false);
			$this->strip_htmltags(false);
			$this->strip_attributes(false);
			$this->set_image_handler(false);
		}
	}

	/**
	 * Set maximum number of feeds to check with autodiscovery
	 *
	 * @access public
	 * @param int $max Maximum number of feeds to check
	 */
	function set_max_checked_feeds($max = 10)
	{
		$this->max_checked_feeds = (int) $max;
	}

	function remove_div($enable = true)
	{
		$this->sanitize->remove_div($enable);
	}

	function strip_htmltags($tags = '', $encode = null)
	{
		if ($tags === '')
		{
			$tags = $this->strip_htmltags;
		}
		$this->sanitize->strip_htmltags($tags);
		if ($encode !== null)
		{
			$this->sanitize->encode_instead_of_strip($tags);
		}
	}

	function encode_instead_of_strip($enable = true)
	{
		$this->sanitize->encode_instead_of_strip($enable);
	}

	function strip_attributes($attribs = '')
	{
		if ($attribs === '')
		{
			$attribs = $this->strip_attributes;
		}
		$this->sanitize->strip_attributes($attribs);
	}

	function set_output_encoding($encoding = 'UTF-8')
	{
		$this->sanitize->set_output_encoding($encoding);
	}

	function strip_comments($strip = false)
	{
		$this->sanitize->strip_comments($strip);
	}

	/**
	 * Set element/attribute key/value pairs of HTML attributes
	 * containing URLs that need to be resolved relative to the feed
	 *
	 * @access public
	 * @since 1.0
	 * @param array $element_attribute Element/attribute key/value pairs
	 */
	function set_url_replacements($element_attribute = array('a' => 'href', 'area' => 'href', 'blockquote' => 'cite', 'del' => 'cite', 'form' => 'action', 'img' => array('longdesc', 'src'), 'input' => 'src', 'ins' => 'cite', 'q' => 'cite'))
	{
		$this->sanitize->set_url_replacements($element_attribute);
	}

	/**
	 * Set the handler to enable the display of cached favicons.
	 *
	 * @access public
	 * @param str $page Web-accessible path to the handler_favicon.php file.
	 * @param str $qs The query string that the value should be passed to.
	 */
	function set_favicon_handler($page = false, $qs = 'i')
	{
		if ($page !== false)
		{
			$this->favicon_handler = $page . '?' . $qs . '=';
		}
		else
		{
			$this->favicon_handler = '';
		}
	}

	/**
	 * Set the handler to enable the display of cached images.
	 *
	 * @access public
	 * @param str $page Web-accessible path to the handler_image.php file.
	 * @param str $qs The query string that the value should be passed to.
	 */
	function set_image_handler($page = false, $qs = 'i')
	{
		if ($page !== false)
		{
			$this->sanitize->set_image_handler($page . '?' . $qs . '=');
		}
		else
		{
			$this->image_handler = '';
		}
	}

	/**
	 * Set the limit for items returned per-feed with multifeeds.
	 *
	 * @access public
	 * @param integer $limit The maximum number of items to return.
	 */
	function set_item_limit($limit = 0)
	{
		$this->item_limit = (int) $limit;
	}

	function init()
	{
		// Check absolute bare minimum requirements.
		if ((function_exists('version_compare') && version_compare(PHP_VERSION, '4.3.0', '<')) || !extension_loaded('xml') || !extension_loaded('pcre'))
		{
			return false;
		}
		// Then check the xml extension is sane (i.e., libxml 2.7.x issue on PHP < 5.2.9 and libxml 2.7.0 to 2.7.2 on any version) if we don't have xmlreader.
		elseif (!extension_loaded('xmlreader'))
		{
			static $xml_is_sane = null;
			if ($xml_is_sane === null)
			{
				$parser_check = xml_parser_create();
				xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);
				xml_parser_free($parser_check);
				$xml_is_sane = isset($values[0]['value']);
			}
			if (!$xml_is_sane)
			{
				return false;
			}
		}

		if (isset($_GET[$this->javascript]))
		{
			Simplepie_Misc::output_javascript();
			exit;
		}

		// Pass whatever was set with config options over to the sanitizer.
		$this->sanitize->pass_cache_data($this->cache, $this->cache_location, $this->cache_name_function, $this->cache_class);
		$this->sanitize->pass_file_data($this->file_class, $this->timeout, $this->useragent, $this->force_fsockopen);

		if ($this->feed_url !== null || $this->raw_data !== null)
		{
			$this->data = array();
			$this->multifeed_objects = array();
			$cache = false;

			if ($this->feed_url !== null)
			{
				$parsed_feed_url = Simplepie_Misc::parse_url($this->feed_url);
				// Decide whether to enable caching
				if ($this->cache && $parsed_feed_url['scheme'] !== '')
				{
					$cache = call_user_func(array($this->cache_class, 'create'), $this->cache_location, call_user_func($this->cache_name_function, $this->feed_url), 'spc');
				}
				// If it's enabled and we don't want an XML dump, use the cache
				if ($cache && !$this->xml_dump)
				{
					// Load the Cache
					$this->data = $cache->load();
					if (!empty($this->data))
					{
						// If the cache is for an outdated build of Simplepie
						if (!isset($this->data['build']) || $this->data['build'] !== SIMPLEPIE_BUILD)
						{
							$cache->unlink();
							$this->data = array();
						}
						// If we've hit a collision just rerun it with caching disabled
						elseif (isset($this->data['url']) && $this->data['url'] !== $this->feed_url)
						{
							$cache = false;
							$this->data = array();
						}
						// If we've got a non feed_url stored (if the page isn't actually a feed, or is a redirect) use that URL.
						elseif (isset($this->data['feed_url']))
						{
							// If the autodiscovery cache is still valid use it.
							if ($cache->mtime() + $this->autodiscovery_cache_duration > time())
							{
								// Do not need to do feed autodiscovery yet.
								if ($this->data['feed_url'] === $this->data['url'])
								{
									$cache->unlink();
									$this->data = array();
								}
								else
								{
									$this->set_feed_url($this->data['feed_url']);
									return $this->init();
								}
							}
						}
						// Check if the cache has been updated
						elseif ($cache->mtime() + $this->cache_duration < time())
						{
							// If we have last-modified and/or etag set
							if (isset($this->data['headers']['last-modified']) || isset($this->data['headers']['etag']))
							{
								$headers = array();
								if (isset($this->data['headers']['last-modified']))
								{
									$headers['if-modified-since'] = $this->data['headers']['last-modified'];
								}
								if (isset($this->data['headers']['etag']))
								{
									$headers['if-none-match'] = '"' . $this->data['headers']['etag'] . '"';
								}
								$file = new $this->file_class($this->feed_url, $this->timeout/10, 5, $headers, $this->useragent, $this->force_fsockopen);
								if ($file->success)
								{
									if ($file->status_code === 304)
									{
										$cache->touch();
										return true;
									}
									else
									{
										$headers = $file->headers;
									}
								}
								else
								{
									unset($file);
								}
							}
						}
						// If the cache is still valid, just return true
						else
						{
							return true;
						}
					}
					// If the cache is empty, delete it
					else
					{
						$cache->unlink();
						$this->data = array();
					}
				}
				// If we don't already have the file (it'll only exist if we've opened it to check if the cache has been modified), open it.
				if (!isset($file))
				{
					if (is_a($this->file, 'Simplepie_File') && $this->file->url === $this->feed_url)
					{
						$file =& $this->file;
					}
					else
					{
						$file = new $this->file_class($this->feed_url, $this->timeout, 5, null, $this->useragent, $this->force_fsockopen);
					}
				}
				// If the file connection has an error, set Simplepie::error to that and quit
				if (!$file->success && !($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300)))
				{
					$this->error = $file->error;
					if (!empty($this->data))
					{
						return true;
					}
					else
					{
						return false;
					}
				}
                                

				if (!$this->force_feed)
				{
					// Check if the supplied URL is a feed, if it isn't, look for it.
					$locate = new $this->locator_class($file, $this->timeout, $this->useragent, $this->file_class, $this->max_checked_feeds, $this->content_type_sniffer_class);
					if (!$locate->is_feed($file))
					{
						// We need to unset this so that if Simplepie::set_file() has been called that object is untouched
						unset($file);
						if ($file = $locate->find($this->autodiscovery, $this->all_discovered_feeds))
						{
							if ($cache)
							{
								$this->data = array('url' => $this->feed_url, 'feed_url' => $file->url, 'build' => SIMPLEPIE_BUILD);
								if (!$cache->save($this))
								{
									trigger_error("$this->cache_location is not writeable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
								}
								$cache = call_user_func(array($this->cache_class, 'create'), $this->cache_location, call_user_func($this->cache_name_function, $file->url), 'spc');
							}
							$this->feed_url = $file->url;
						}
						else
						{
							$this->error = "A feed could not be found at $this->feed_url. A feed with an invalid mime type may fall victim to this error, or " . SIMPLEPIE_NAME . " was unable to auto-discover it.. Use force_feed() if you are certain this URL is a real feed.";
							Simplepie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
							return false;
						}
					}
					$locate = null;
				}

				$headers = $file->headers;
				$data = $file->body;
				$sniffer = new $this->content_type_sniffer_class($file);
				$sniffed = $sniffer->get_type();
			}
			else
			{
				$data = $this->raw_data;
			}

			// Set up array of possible encodings
			$encodings = array();

			// First check to see if input has been overridden.
			if ($this->input_encoding !== false)
			{
				$encodings[] = $this->input_encoding;
			}

			$application_types = array('application/xml', 'application/xml-dtd', 'application/xml-external-parsed-entity');
			$text_types = array('text/xml', 'text/xml-external-parsed-entity');

			// RFC 3023 (only applies to sniffed content)
			if (isset($sniffed))
			{
				if (in_array($sniffed, $application_types) || substr($sniffed, 0, 12) === 'application/' && substr($sniffed, -4) === '+xml')
				{
					if (isset($headers['content-type']) && preg_match('/;\x20?charset=([^;]*)/i', $headers['content-type'], $charset))
					{
						$encodings[] = strtoupper($charset[1]);
					}
					$encodings = array_merge($encodings, Simplepie_Misc::xml_encoding($data));
					$encodings[] = 'UTF-8';
				}
				elseif (in_array($sniffed, $text_types) || substr($sniffed, 0, 5) === 'text/' && substr($sniffed, -4) === '+xml')
				{
					if (isset($headers['content-type']) && preg_match('/;\x20?charset=([^;]*)/i', $headers['content-type'], $charset))
					{
						$encodings[] = $charset[1];
					}
					$encodings[] = 'US-ASCII';
				}
				// Text MIME-type default
				elseif (substr($sniffed, 0, 5) === 'text/')
				{
					$encodings[] = 'US-ASCII';
				}
			}

			// Fallback to XML 1.0 Appendix F.1/UTF-8/ISO-8859-1
			$encodings = array_merge($encodings, Simplepie_Misc::xml_encoding($data));
			$encodings[] = 'UTF-8';
			$encodings[] = 'ISO-8859-1';

			// There's no point in trying an encoding twice
			$encodings = array_unique($encodings);

			// If we want the XML, just output that with the most likely encoding and quit
			if ($this->xml_dump)
			{
				header('Content-type: text/xml; charset=' . $encodings[0]);
				echo $data;
				exit;
			}

			// Loop through each possible encoding, till we return something, or run out of possibilities
			foreach ($encodings as $encoding)
			{
				// Change the encoding to UTF-8 (as we always use UTF-8 internally)
				if ($utf8_data = Simplepie_Misc::change_encoding($data, $encoding, 'UTF-8'))
				{
					// Create new parser
					$parser = new $this->parser_class();

					// If it's parsed fine
					if ($parser->parse($utf8_data, 'UTF-8'))
					{
						$this->data = $parser->get_data();
						if ($this->get_type() & ~SIMPLEPIE_TYPE_NONE)
						{
							if (isset($headers))
							{
								$this->data['headers'] = $headers;
							}
							$this->data['build'] = SIMPLEPIE_BUILD;

							// Cache the file if caching is enabled
							if ($cache && !$cache->save($this))
							{
								trigger_error("$this->cache_location is not writeable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
							}
							return true;
						}
						else
						{
							$this->error = "A feed could not be found at $this->feed_url. This does not appear to be a valid RSS or Atom feed.";
							Simplepie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
							return false;
						}
					}
				}
			}
			if (isset($parser))
			{
				// We have an error, just set Simplepie_Misc::error to it and quit
				$this->error = sprintf('This XML document is invalid, likely due to invalid characters. XML error: %s at line %d, column %d', $parser->get_error_string(), $parser->get_current_line(), $parser->get_current_column());
			}
			else
			{
				$this->error = 'The data could not be converted to UTF-8. You MUST have either the iconv or mbstring extension installed. Upgrading to PHP 5.x (which includes iconv) is highly recommended.';
			}
			Simplepie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
			return false;
		}
		elseif (!empty($this->multifeed_url))
		{
			$i = 0;
			$success = 0;
			$this->multifeed_objects = array();
			foreach ($this->multifeed_url as $url)
			{
				if (SIMPLEPIE_PHP5)
				{
					// This keyword needs to defy coding standards for PHP4 compatibility
					$this->multifeed_objects[$i] = clone($this);
				}
				else
				{
					$this->multifeed_objects[$i] = $this;
				}
				$this->multifeed_objects[$i]->set_feed_url($url);
				$success |= $this->multifeed_objects[$i]->init();
				$i++;
			}
			return (bool) $success;
		}
		else
		{
			return false;
		}
	}

	/**
	 * Return the error message for the occured error
	 *
	 * @access public
	 * @return string Error message
	 */
	function error()
	{
		return $this->error;
	}

	function get_encoding()
	{
		return $this->sanitize->output_encoding;
	}

	function handle_content_type($mime = 'text/html')
	{
		if (!headers_sent())
		{
			$header = "Content-type: $mime;";
			if ($this->get_encoding())
			{
				$header .= ' charset=' . $this->get_encoding();
			}
			else
			{
				$header .= ' charset=UTF-8';
			}
			header($header);
		}
	}

	function get_type()
	{
		if (!isset($this->data['type']))
		{
			$this->data['type'] = SIMPLEPIE_TYPE_ALL;
			if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed']))
			{
				$this->data['type'] &= SIMPLEPIE_TYPE_ATOM_10;
			}
			elseif (isset($this->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed']))
			{
				$this->data['type'] &= SIMPLEPIE_TYPE_ATOM_03;
			}
			elseif (isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF']))
			{
				if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_10]['channel'])
				|| isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_10]['image'])
				|| isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item'])
				|| isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_10]['textinput']))
				{
					$this->data['type'] &= SIMPLEPIE_TYPE_RSS_10;
				}
				if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_090]['channel'])
				|| isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_090]['image'])
				|| isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item'])
				|| isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_090]['textinput']))
				{
					$this->data['type'] &= SIMPLEPIE_TYPE_RSS_090;
				}
			}
			elseif (isset($this->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss']))
			{
				$this->data['type'] &= SIMPLEPIE_TYPE_RSS_ALL;
				if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['attribs']['']['version']))
				{
					switch (trim($this->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['attribs']['']['version']))
					{
						case '0.91':
							$this->data['type'] &= SIMPLEPIE_TYPE_RSS_091;
							if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['skiphours']['hour'][0]['data']))
							{
								switch (trim($this->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['skiphours']['hour'][0]['data']))
								{
									case '0':
										$this->data['type'] &= SIMPLEPIE_TYPE_RSS_091_NETSCAPE;
										break;

									case '24':
										$this->data['type'] &= SIMPLEPIE_TYPE_RSS_091_USERLAND;
										break;
								}
							}
							break;

						case '0.92':
							$this->data['type'] &= SIMPLEPIE_TYPE_RSS_092;
							break;

						case '0.93':
							$this->data['type'] &= SIMPLEPIE_TYPE_RSS_093;
							break;

						case '0.94':
							$this->data['type'] &= SIMPLEPIE_TYPE_RSS_094;
							break;

						case '2.0':
							$this->data['type'] &= SIMPLEPIE_TYPE_RSS_20;
							break;
					}
				}
			}
			else
			{
				$this->data['type'] = SIMPLEPIE_TYPE_NONE;
			}
		}
		return $this->data['type'];
	}

	/**
	 * Returns the URL for the favicon of the feed's website.
	 *
	 * @todo Cache atom:icon
	 * @access public
	 * @since 1.0
	 */
	function get_favicon()
	{
		if ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'icon'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($return[0]));
		}
		elseif (($url = $this->get_link()) !== null && preg_match('/^http(s)?:\/\//i', $url))
		{
			$favicon = Simplepie_Misc::absolutize_url('/favicon.ico', $url);

			if ($this->cache && $this->favicon_handler)
			{
				$favicon_filename = call_user_func($this->cache_name_function, $favicon);
				$cache = call_user_func(array($this->cache_class, 'create'), $this->cache_location, $favicon_filename, 'spi');

				if ($cache->load())
				{
					return $this->sanitize($this->favicon_handler . $favicon_filename, SIMPLEPIE_CONSTRUCT_IRI);
				}
				else
				{
					$file = new $this->file_class($favicon, $this->timeout / 10, 5, array('X-FORWARDED-FOR' => $_SERVER['REMOTE_ADDR']), $this->useragent, $this->force_fsockopen);

					if ($file->success && ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300)) && strlen($file->body) > 0)
					{
						$sniffer = new $this->content_type_sniffer_class($file);
						if (substr($sniffer->get_type(), 0, 6) === 'image/')
						{
							if ($cache->save(array('headers' => $file->headers, 'body' => $file->body)))
							{
								return $this->sanitize($this->favicon_handler . $favicon_filename, SIMPLEPIE_CONSTRUCT_IRI);
							}
							else
							{
								trigger_error("$cache->name is not writeable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
								return $this->sanitize($favicon, SIMPLEPIE_CONSTRUCT_IRI);
							}
						}
						// not an image
						else
						{
							return false;
						}
					}
				}
			}
			else
			{
				return $this->sanitize($favicon, SIMPLEPIE_CONSTRUCT_IRI);
			}
		}
		return false;
	}

	/**
	 * @todo If we have a perm redirect we should return the new URL
	 * @todo When we make the above change, let's support <itunes:new-feed-url> as well
	 * @todo Also, |atom:link|@rel=self
	 */
	function subscribe_url()
	{
		if ($this->feed_url !== null)
		{
			return $this->sanitize($this->feed_url, SIMPLEPIE_CONSTRUCT_IRI);
		}
		else
		{
			return null;
		}
	}

	function subscribe_feed()
	{
		if ($this->feed_url !== null)
		{
			return $this->sanitize(Simplepie_Misc::fix_protocol($this->feed_url, 2), SIMPLEPIE_CONSTRUCT_IRI);
		}
		else
		{
			return null;
		}
	}

	function subscribe_outlook()
	{
		if ($this->feed_url !== null)
		{
			return $this->sanitize('outlook' . Simplepie_Misc::fix_protocol($this->feed_url, 2), S…