/third-party/simplepie.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) 2004-2010, 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 1.3-dev
 * @copyright 2004-2010 Ryan Parman, Geoffrey Sneddon, Ryan McCue
 * @author Ryan Parman
 * @author Geoffrey Sneddon
 * @author Ryan McCue
 * @link http://simplepie.org/ SimplePie
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
 * @todo phpDoc comments
 */

/**
 * SimplePie class.
 *
 * Class for backward compatibility.
 *
 * @package SimplePie
 */
class SimplePie extends SimplePie_Core
{

}

class SimplePie_Author
{
	var $name;
	var $link;
	var $email;

	// Constructor, used to input the data
	public function __construct($name = null, $link = null, $email = null)
	{
		$this->name = $name;
		$this->link = $link;
		$this->email = $email;
	}

	public function __toString()
	{
		// There is no $this->data here
		return md5(serialize($this));
	}

	public function get_name()
	{
		if ($this->name !== null)
		{
			return $this->name;
		}
		else
		{
			return null;
		}
	}

	public function get_link()
	{
		if ($this->link !== null)
		{
			return $this->link;
		}
		else
		{
			return null;
		}
	}

	public function get_email()
	{
		if ($this->email !== null)
		{
			return $this->email;
		}
		else
		{
			return null;
		}
	}
}

interface SimplePie_Cache_Base
{
	/**
	 * Feed cache type
	 */
	const TYPE_FEED = 'spc';

	/**
	 * Image cache type
	 */
	const TYPE_IMAGE = 'spi';

	/**
	 * Create a new cache object
	 *
	 * @param string $location Location string (from SimplePie::$cache_location)
	 * @param string $name Unique ID for the cache
	 * @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data
	 */
	public function __construct($location, $name, $type);

	/**
	 * Save data to the cache
	 *
	 * @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property
	 */
	public function save($data);

	/**
	 * Retrieve the data saved to the cache
	 *
	 * @return array Data for SimplePie::$data
	 */
	public function load();

	/**
	 * Retrieve the last modified time for the cache
	 *
	 * @return int Timestamp
	 */
	public function mtime();

	/**
	 * Set the last modified time to the current time
	 *
	 * @return bool Success status
	 */
	public function touch();

	/**
	 * Remove the cache
	 *
	 * @return bool Success status
	 */
	public function unlink();
}

abstract class SimplePie_Cache_DB implements SimplePie_Cache_Base
{
	protected static function prepare_simplepie_object_for_cache(&$data)
	{
		$items = $data->get_items();
		$items_by_id = array();

		if (!empty($items))
		{
			foreach ($items as $item)
			{
				$items_by_id[$item->get_id()] = $item;
			}

			if (count($items_by_id) !== count($items))
			{
				$items_by_id = array();
				foreach ($items as $item)
				{
					$items_by_id[$item->get_id(true)] = $item;
				}
			}

			if (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
			}
			elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
			}
			elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
			}
			elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0];
			}
			else
			{
				$channel = null;
			}

			if ($channel !== null)
			{
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']);
				}
			}
			if (isset($data->data['items']))
			{
				unset($data->data['items']);
			}
			if (isset($data->data['ordered_items']))
			{
				unset($data->data['ordered_items']);
			}
		}
		return array(serialize($data->data), $items_by_id);
	}
}

class SimplePie_Cache_File implements SimplePie_Cache_Base
{
	protected $location;
	protected $filename;
	protected $extension;
	protected $name;

	public function __construct($location, $filename, $extension)
	{
		$this->location = $location;
		$this->filename = $filename;
		$this->extension = $extension;
		$this->name = "$this->location/$this->filename.$this->extension";
	}

	public function save($data)
	{
		if (file_exists($this->name) && is_writeable($this->name) || file_exists($this->location) && is_writeable($this->location))
		{
			if (is_a($data, 'SimplePie'))
			{
				$data = $data->data;
			}

			$data = serialize($data);
			return (bool) file_put_contents($this->name, $data);
		}
		return false;
	}

	public function load()
	{
		if (file_exists($this->name) && is_readable($this->name))
		{
			return unserialize(file_get_contents($this->name));
		}
		return false;
	}

	public function mtime()
	{
		if (file_exists($this->name))
		{
			return filemtime($this->name);
		}
		return false;
	}

	public function touch()
	{
		if (file_exists($this->name))
		{
			return touch($this->name);
		}
		return false;
	}

	public function unlink()
	{
		if (file_exists($this->name))
		{
			return unlink($this->name);
		}
		return false;
	}
}

class SimplePie_Cache_Memcache implements SimplePie_Cache_Base
{
	protected $cache;
	protected $options;
	protected $name;

	public function __construct($url, $filename, $extension)
	{
		$this->options = array(
			'host' => '127.0.0.1',
			'port' => 11211,
			'extras' => array(
				'timeout' => 3600, // one hour
				'prefix' => 'simplepie_',
			),
		);
		$this->options = array_merge_recursive($this->options, SimplePie_Cache::parse_URL($url));
		$this->name = $this->options['extras']['prefix'] . md5("$filename:$extension");

		$this->cache = new Memcache();
		$this->cache->addServer($this->options['host'], (int) $this->options['port']);
	}

	public function save($data)
	{
		if (is_a($data, 'SimplePie'))
		{
			$data = $data->data;
		}
		return $this->cache->set($this->name, serialize($data), MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']);
	}

	public function load()
	{
		$data = $this->cache->get($this->name);

		if ($data !== false)
		{
			return unserialize($data);
		}
		return false;
	}

	public function mtime()
	{
		$data = $this->cache->get($this->name);

		if ($data !== false)
		{
			// essentially ignore the mtime because Memcache expires on it's own
			return time();
		}

		return false;
	}

	public function touch()
	{
		$data = $this->cache->get($this->name);

		if ($data !== false)
		{
			return $this->cache->set($this->name, $data, MEMCACHE_COMPRESSED, (int) $this->duration);
		}

		return false;
	}

	public function unlink()
	{
		return $this->cache->delete($this->name, 0);
	}
}

class SimplePie_Cache_MySQL extends SimplePie_Cache_DB
{
	protected $mysql;
	protected $options;
	protected $id;

	public function __construct($url, $name, $extension)
	{
		$this->options = array(
			'user' => null,
			'pass' => null,
			'host' => '127.0.0.1',
			'port' => '3306',
			'path' => '',
			'extras' => array(
				'prefix' => '',
			),
		);
		$this->options = array_merge_recursive($this->options, SimplePie_Cache::parse_URL($url));

		// Path is prefixed with a "/"
		$this->options['dbname'] = substr($this->options['path'], 1);

		try
		{
			$this->mysql = new PDO("mysql:dbname={$this->options['dbname']};host={$this->options['host']};port={$this->options['port']}", $this->options['user'], $this->options['pass'], array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'));
		}
		catch (PDOException $e)
		{
			$this->mysql = null;
			return;
		}

		$this->id = $name . $extension;

		if (!$query = $this->mysql->query('SHOW TABLES'))
		{
			$this->mysql = null;
			return;
		}

		$db = array();
		while ($row = $query->fetchColumn())
		{
			$db[] = $row;
		}

		if (!in_array($this->options['extras']['prefix'] . 'cache_data', $db))
		{
			$query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'cache_data` (`id` TEXT CHARACTER SET utf8 NOT NULL, `items` SMALLINT NOT NULL DEFAULT 0, `data` BLOB NOT NULL, `mtime` INT UNSIGNED NOT NULL, UNIQUE (`id`(125)))');
			if ($query === false)
			{
				$this->mysql = null;
			}
		}

		if (!in_array($this->options['extras']['prefix'] . 'items', $db))
		{
			$query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'items` (`feed_id` TEXT CHARACTER SET utf8 NOT NULL, `id` TEXT CHARACTER SET utf8 NOT NULL, `data` TEXT CHARACTER SET utf8 NOT NULL, `posted` INT UNSIGNED NOT NULL, INDEX `feed_id` (`feed_id`(125)))');
			if ($query === false)
			{
				$this->mysql = null;
			}
		}
	}

	public function save($data)
	{
		if ($this->mysql === null)
		{
			return false;
		}

		if (is_a($data, 'SimplePie'))
		{
			$data = clone $data;

			$prepared = self::prepare_simplepie_object_for_cache($data);

			$query = $this->mysql->prepare('SELECT COUNT(*) FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
			$query->bindValue(':feed', $this->id);
			if ($query->execute())
			{
				if ($query->fetchColumn() > 0)
				{
					$items = count($prepared[1]);
					if ($items)
					{
						$sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = :items, `data` = :data, `mtime` = :time WHERE `id` = :feed';
						$query = $this->mysql->prepare($sql);
						$query->bindValue(':items', $items);
					}
					else
					{
						$sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `data` = :data, `mtime` = :time WHERE `id` = :feed';
						$query = $this->mysql->prepare($sql);
					}

					$query->bindValue(':data', $prepared[0]);
					$query->bindValue(':time', time());
					$query->bindValue(':feed', $this->id);
					if (!$query->execute())
					{
						return false;
					}
				}
				else
				{
					$query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:feed, :count, :data, :time)');
					$query->bindValue(':feed', $this->id);
					$query->bindValue(':count', count($prepared[1]));
					$query->bindValue(':data', $prepared[0]);
					$query->bindValue(':time', time());
					if (!$query->execute())
					{
						return false;
					}
				}

				$ids = array_keys($prepared[1]);
				if (!empty($ids))
				{
					foreach ($ids as $id)
					{
						$database_ids[] = $this->mysql->quote($id);
					}

					$query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `id` = ' . implode(' OR `id` = ', $database_ids) . ' AND `feed_id` = :feed');
					$query->bindValue(':feed', $this->id);

					if ($query->execute())
					{
						$existing_ids = array();
						while ($row = $query->fetchColumn())
						{
							$existing_ids[] = $row;
						}

						$new_ids = array_diff($ids, $existing_ids);

						foreach ($new_ids as $new_id)
						{
							if (!($date = $prepared[1][$new_id]->get_date('U')))
							{
								$date = time();
							}

							$query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'items` (`feed_id`, `id`, `data`, `posted`) VALUES(:feed, :id, :data, :date)');
							$query->bindValue(':feed', $this->id);
							$query->bindValue(':id', $new_id);
							$query->bindValue(':data', serialize($prepared[1][$new_id]->data));
							$query->bindValue(':date', $date);
							if (!$query->execute())
							{
								return false;
							}
						}
						return true;
					}
				}
				else
				{
					return true;
				}
			}
		}
		else
		{
			$query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
			$query->bindValue(':feed', $this->id);
			if ($query->execute())
			{
				if ($query->rowCount() > 0)
				{
					$query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = 0, `data` = :data, `mtime` = :time WHERE `id` = :feed');
					$query->bindValue(':data', serialize($data));
					$query->bindValue(':time', time());
					$query->bindValue(':feed', $this->id);
					if ($this->execute())
					{
						return true;
					}
				}
				else
				{
					$query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:id, 0, :data, :time)');
					$query->bindValue(':id', $this->id);
					$query->bindValue(':data', serialize($data));
					$query->bindValue(':time', time());
					if ($query->execute())
					{
						return true;
					}
				}
			}
		}
		return false;
	}

	public function load()
	{
		if ($this->mysql === null)
		{
			return false;
		}

		$query = $this->mysql->prepare('SELECT `items`, `data` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
		$query->bindValue(':id', $this->id);
		if ($query->execute() && ($row = $query->fetch()))
		{
			$data = unserialize($row[1]);

			if (isset($this->options['items'][0]))
			{
				$items = (int) $this->options['items'][0];
			}
			else
			{
				$items = (int) $row[0];
			}

			if ($items !== 0)
			{
				if (isset($data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
				{
					$feed =& $data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
				}
				elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
				{
					$feed =& $data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
				}
				elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
				{
					$feed =& $data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
				}
				elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]))
				{
					$feed =& $data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0];
				}
				else
				{
					$feed = null;
				}

				if ($feed !== null)
				{
					$sql = 'SELECT `data` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :feed ORDER BY `posted` DESC';
					if ($items > 0)
					{
						$sql .= ' LIMIT ' . $items;
					}

					$query = $this->mysql->prepare($sql);
					$query->bindValue(':feed', $this->id);
					if ($query->execute())
					{
						while ($row = $query->fetchColumn())
						{
							$feed['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry'][] = unserialize($row);
						}
					}
					else
					{
						return false;
					}
				}
			}
			return $data;
		}
		return false;
	}

	public function mtime()
	{
		if ($this->mysql === null)
		{
			return false;
		}

		$query = $this->mysql->prepare('SELECT `mtime` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
		$query->bindValue(':id', $this->id);
		if ($query->execute() && ($time = $query->fetchColumn()))
		{
			return $time;
		}
		else
		{
			return false;
		}
	}

	public function touch()
	{
		if ($this->mysql === null)
		{
			return false;
		}

		$query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `mtime` = :time WHERE `id` = :id');
		$query->bindValue(':time', time());
		$query->bindValue(':id', $this->id);
		if ($query->execute() && $query->rowCount() > 0)
		{
			return true;
		}
		else
		{
			return false;
		}
	}

	public function unlink()
	{
		if ($this->mysql === null)
		{
			return false;
		}

		$query = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
		$query->bindValue(':id', $this->id);
		$query2 = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :id');
		$query2->bindValue(':id', $this->id);
		if ($query->execute() && $query2->execute())
		{
			return true;
		}
		else
		{
			return false;
		}
	}
}

class SimplePie_Cache
{
	/**
	 * Cache handler classes
	 *
	 * These receive 3 parameters to their constructor, as documented in
	 * {@see register()}
	 * @var array
	 */
	protected static $handlers = array(
		'mysql' => 'SimplePie_Cache_MySQL',
		'memcache' => 'SimplePie_Cache_Memcache',
	);

	/**
	 * Don't call the constructor. Please.
	 */
	private function __construct() { }

	/**
	 * Create a new SimplePie_Cache object
	 */
	public static function create($location, $filename, $extension)
	{
		$type = explode(':', $location, 2);
		$type = $type[0];
		if (!empty(self::$handlers[$type]))
		{
			$class = self::$handlers[$type];
			return new $class($location, $filename, $extension);
		}

		return new SimplePie_Cache_File($location, $filename, $extension);
	}

	/**
	 * Register a handler
	 *
	 * @param string $type DSN type to register for
	 * @param string $class Name of handler class. Must implement SimplePie_Cache_Base
	 */
	public static function register($type, $class)
	{
		self::$handlers[$type] = $class;
	}

	/**
	 * Parse a URL into an array
	 *
	 * @param string $url
	 * @return array
	 */
	public static function parse_URL($url)
	{
		$params = parse_url($url);
		$params['extras'] = array();
		if (isset($params['query']))
		{
			parse_str($params['query'], $params['extras']);
		}
		return $params;
	}
}

class SimplePie_Caption
{
	var $type;
	var $lang;
	var $startTime;
	var $endTime;
	var $text;

	// Constructor, used to input the data
	public function __construct($type = null, $lang = null, $startTime = null, $endTime = null, $text = null)
	{
		$this->type = $type;
		$this->lang = $lang;
		$this->startTime = $startTime;
		$this->endTime = $endTime;
		$this->text = $text;
	}

	public function __toString()
	{
		// There is no $this->data here
		return md5(serialize($this));
	}

	public function get_endtime()
	{
		if ($this->endTime !== null)
		{
			return $this->endTime;
		}
		else
		{
			return null;
		}
	}

	public function get_language()
	{
		if ($this->lang !== null)
		{
			return $this->lang;
		}
		else
		{
			return null;
		}
	}

	public function get_starttime()
	{
		if ($this->startTime !== null)
		{
			return $this->startTime;
		}
		else
		{
			return null;
		}
	}

	public function get_text()
	{
		if ($this->text !== null)
		{
			return $this->text;
		}
		else
		{
			return null;
		}
	}

	public function get_type()
	{
		if ($this->type !== null)
		{
			return $this->type;
		}
		else
		{
			return null;
		}
	}
}

class SimplePie_Category
{
	var $term;
	var $scheme;
	var $label;

	// Constructor, used to input the data
	public function __construct($term = null, $scheme = null, $label = null)
	{
		$this->term = $term;
		$this->scheme = $scheme;
		$this->label = $label;
	}

	public function __toString()
	{
		// There is no $this->data here
		return md5(serialize($this));
	}

	public function get_term()
	{
		if ($this->term !== null)
		{
			return $this->term;
		}
		else
		{
			return null;
		}
	}

	public function get_scheme()
	{
		if ($this->scheme !== null)
		{
			return $this->scheme;
		}
		else
		{
			return null;
		}
	}

	public function get_label()
	{
		if ($this->label !== null)
		{
			return $this->label;
		}
		else
		{
			return $this->get_term();
		}
	}
}

/**
 * Content-type sniffing
 *
 * Based on the rules in http://tools.ietf.org/html/draft-abarth-mime-sniff-06
 * @package SimplePie
 */
class SimplePie_Content_Type_Sniffer
{
	/**
	 * File object
	 *
	 * @var SimplePie_File
	 */
	var $file;

	/**
	 * Create an instance of the class with the input file
	 *
	 * @param SimplePie_Content_Type_Sniffer $file Input file
	 */
	public function __construct($file)
	{
		$this->file = $file;
	}

	/**
	 * Get the Content-Type of the specified file
	 *
	 * @return string Actual Content-Type
	 */
	public function get_type()
	{
		if (isset($this->file->headers['content-type']))
		{
			if (!isset($this->file->headers['content-encoding'])
				&& ($this->file->headers['content-type'] === 'text/plain'
					|| $this->file->headers['content-type'] === 'text/plain; charset=ISO-8859-1'
					|| $this->file->headers['content-type'] === 'text/plain; charset=iso-8859-1'
					|| $this->file->headers['content-type'] === 'text/plain; charset=UTF-8'))
			{
				return $this->text_or_binary();
			}

			if (($pos = strpos($this->file->headers['content-type'], ';')) !== false)
			{
				$official = substr($this->file->headers['content-type'], 0, $pos);
			}
			else
			{
				$official = $this->file->headers['content-type'];
			}
			$official = trim(strtolower($official));

			if ($official === 'unknown/unknown'
				|| $official === 'application/unknown')
			{
				return $this->unknown();
			}
			elseif (substr($official, -4) === '+xml'
				|| $official === 'text/xml'
				|| $official === 'application/xml')
			{
				return $official;
			}
			elseif (substr($official, 0, 6) === 'image/')
			{
				if ($return = $this->image())
				{
					return $return;
				}
				else
				{
					return $official;
				}
			}
			elseif ($official === 'text/html')
			{
				return $this->feed_or_html();
			}
			else
			{
				return $official;
			}
		}
		else
		{
			return $this->unknown();
		}
	}

	/**
	 * Sniff text or binary
	 *
	 * @return string Actual Content-Type
	 */
	public function text_or_binary()
	{
		if (substr($this->file->body, 0, 2) === "\xFE\xFF"
			|| substr($this->file->body, 0, 2) === "\xFF\xFE"
			|| substr($this->file->body, 0, 4) === "\x00\x00\xFE\xFF"
			|| substr($this->file->body, 0, 3) === "\xEF\xBB\xBF")
		{
			return 'text/plain';
		}
		elseif (preg_match('/[\x00-\x08\x0E-\x1A\x1C-\x1F]/', $this->file->body))
		{
			return 'application/octect-stream';
		}
		else
		{
			return 'text/plain';
		}
	}

	/**
	 * Sniff unknown
	 *
	 * @return string Actual Content-Type
	 */
	public function unknown()
	{
		$ws = strspn($this->file->body, "\x09\x0A\x0B\x0C\x0D\x20");
		if (strtolower(substr($this->file->body, $ws, 14)) === '<!doctype html'
			|| strtolower(substr($this->file->body, $ws, 5)) === '<html'
			|| strtolower(substr($this->file->body, $ws, 7)) === '<script')
		{
			return 'text/html';
		}
		elseif (substr($this->file->body, 0, 5) === '%PDF-')
		{
			return 'application/pdf';
		}
		elseif (substr($this->file->body, 0, 11) === '%!PS-Adobe-')
		{
			return 'application/postscript';
		}
		elseif (substr($this->file->body, 0, 6) === 'GIF87a'
			|| substr($this->file->body, 0, 6) === 'GIF89a')
		{
			return 'image/gif';
		}
		elseif (substr($this->file->body, 0, 8) === "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A")
		{
			return 'image/png';
		}
		elseif (substr($this->file->body, 0, 3) === "\xFF\xD8\xFF")
		{
			return 'image/jpeg';
		}
		elseif (substr($this->file->body, 0, 2) === "\x42\x4D")
		{
			return 'image/bmp';
		}
		elseif (substr($this->file->body, 0, 4) === "\x00\x00\x01\x00")
		{
			return 'image/vnd.microsoft.icon';
		}
		else
		{
			return $this->text_or_binary();
		}
	}

	/**
	 * Sniff images
	 *
	 * @return string Actual Content-Type
	 */
	public function image()
	{
		if (substr($this->file->body, 0, 6) === 'GIF87a'
			|| substr($this->file->body, 0, 6) === 'GIF89a')
		{
			return 'image/gif';
		}
		elseif (substr($this->file->body, 0, 8) === "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A")
		{
			return 'image/png';
		}
		elseif (substr($this->file->body, 0, 3) === "\xFF\xD8\xFF")
		{
			return 'image/jpeg';
		}
		elseif (substr($this->file->body, 0, 2) === "\x42\x4D")
		{
			return 'image/bmp';
		}
		elseif (substr($this->file->body, 0, 4) === "\x00\x00\x01\x00")
		{
			return 'image/vnd.microsoft.icon';
		}
		else
		{
			return false;
		}
	}

	/**
	 * Sniff HTML
	 *
	 * @return string Actual Content-Type
	 */
	public function feed_or_html()
	{
		$len = strlen($this->file->body);
		$pos = strspn($this->file->body, "\x09\x0A\x0D\x20");

		while ($pos < $len)
		{
			switch ($this->file->body[$pos])
			{
				case "\x09":
				case "\x0A":
				case "\x0D":
				case "\x20":
					$pos += strspn($this->file->body, "\x09\x0A\x0D\x20", $pos);
					continue 2;

				case '<':
					$pos++;
					break;

				default:
					return 'text/html';
			}

			if (substr($this->file->body, $pos, 3) === '!--')
			{
				$pos += 3;
				if ($pos < $len && ($pos = strpos($this->file->body, '-->', $pos)) !== false)
				{
					$pos += 3;
				}
				else
				{
					return 'text/html';
				}
			}
			elseif (substr($this->file->body, $pos, 1) === '!')
			{
				if ($pos < $len && ($pos = strpos($this->file->body, '>', $pos)) !== false)
				{
					$pos++;
				}
				else
				{
					return 'text/html';
				}
			}
			elseif (substr($this->file->body, $pos, 1) === '?')
			{
				if ($pos < $len && ($pos = strpos($this->file->body, '?>', $pos)) !== false)
				{
					$pos += 2;
				}
				else
				{
					return 'text/html';
				}
			}
			elseif (substr($this->file->body, $pos, 3) === 'rss'
				|| substr($this->file->body, $pos, 7) === 'rdf:RDF')
			{
				return 'application/rss+xml';
			}
			elseif (substr($this->file->body, $pos, 4) === 'feed')
			{
				return 'application/atom+xml';
			}
			else
			{
				return 'text/html';
			}
		}

		return 'text/html';
	}
}

class SimplePie_Copyright
{
	var $url;
	var $label;

	// Constructor, used to input the data
	public function __construct($url = null, $label = null)
	{
		$this->url = $url;
		$this->label = $label;
	}

	public function __toString()
	{
		// There is no $this->data here
		return md5(serialize($this));
	}

	public function get_url()
	{
		if ($this->url !== null)
		{
			return $this->url;
		}
		else
		{
			return null;
		}
	}

	public function get_attribution()
	{
		if ($this->label !== null)
		{
			return $this->label;
		}
		else
		{
			return null;
		}
	}
}

/**
 * SimplePie Name
 */
define('SIMPLEPIE_NAME', 'SimplePie');

/**
 * SimplePie Version
 */
define('SIMPLEPIE_VERSION', '1.3-dev');

/**
 * SimplePie Build
 * @todo Hardcode for release (there's no need to have to call SimplePie_Misc::get_build() only every load of simplepie.inc)
 */
define('SIMPLEPIE_BUILD', gmdate('YmdHis', SimplePie_Misc::get_build()));

/**
 * SimplePie Website URL
 */
define('SIMPLEPIE_URL', 'http://simplepie.org');

/**
 * SimplePie Useragent
 * @see SimplePie::set_useragent()
 */
define('SIMPLEPIE_USERAGENT', SIMPLEPIE_NAME . '/' . SIMPLEPIE_VERSION . ' (Feed Parser; ' . SIMPLEPIE_URL . '; Allow like Gecko) Build/' . SIMPLEPIE_BUILD);

/**
 * SimplePie Linkback
 */
define('SIMPLEPIE_LINKBACK', '<a href="' . SIMPLEPIE_URL . '" title="' . SIMPLEPIE_NAME . ' ' . SIMPLEPIE_VERSION . '">' . SIMPLEPIE_NAME . '</a>');

/**
 * No Autodiscovery
 * @see SimplePie::set_autodiscovery_level()
 */
define('SIMPLEPIE_LOCATOR_NONE', 0);

/**
 * Feed Link Element Autodiscovery
 * @see SimplePie::set_autodiscovery_level()
 */
define('SIMPLEPIE_LOCATOR_AUTODISCOVERY', 1);

/**
 * Local Feed Extension Autodiscovery
 * @see SimplePie::set_autodiscovery_level()
 */
define('SIMPLEPIE_LOCATOR_LOCAL_EXTENSION', 2);

/**
 * Local Feed Body Autodiscovery
 * @see SimplePie::set_autodiscovery_level()
 */
define('SIMPLEPIE_LOCATOR_LOCAL_BODY', 4);

/**
 * Remote Feed Extension Autodiscovery
 * @see SimplePie::set_autodiscovery_level()
 */
define('SIMPLEPIE_LOCATOR_REMOTE_EXTENSION', 8);

/**
 * Remote Feed Body Autodiscovery
 * @see SimplePie::set_autodiscovery_level()
 */
define('SIMPLEPIE_LOCATOR_REMOTE_BODY', 16);

/**
 * All Feed Autodiscovery
 * @see SimplePie::set_autodiscovery_level()
 */
define('SIMPLEPIE_LOCATOR_ALL', 31);

/**
 * No known feed type
 */
define('SIMPLEPIE_TYPE_NONE', 0);

/**
 * RSS 0.90
 */
define('SIMPLEPIE_TYPE_RSS_090', 1);

/**
 * RSS 0.91 (Netscape)
 */
define('SIMPLEPIE_TYPE_RSS_091_NETSCAPE', 2);

/**
 * RSS 0.91 (Userland)
 */
define('SIMPLEPIE_TYPE_RSS_091_USERLAND', 4);

/**
 * RSS 0.91 (both Netscape and Userland)
 */
define('SIMPLEPIE_TYPE_RSS_091', 6);

/**
 * RSS 0.92
 */
define('SIMPLEPIE_TYPE_RSS_092', 8);

/**
 * RSS 0.93
 */
define('SIMPLEPIE_TYPE_RSS_093', 16);

/**
 * RSS 0.94
 */
define('SIMPLEPIE_TYPE_RSS_094', 32);

/**
 * RSS 1.0
 */
define('SIMPLEPIE_TYPE_RSS_10', 64);

/**
 * RSS 2.0
 */
define('SIMPLEPIE_TYPE_RSS_20', 128);

/**
 * RDF-based RSS
 */
define('SIMPLEPIE_TYPE_RSS_RDF', 65);

/**
 * Non-RDF-based RSS (truly intended as syndication format)
 */
define('SIMPLEPIE_TYPE_RSS_SYNDICATION', 190);

/**
 * All RSS
 */
define('SIMPLEPIE_TYPE_RSS_ALL', 255);

/**
 * Atom 0.3
 */
define('SIMPLEPIE_TYPE_ATOM_03', 256);

/**
 * Atom 1.0
 */
define('SIMPLEPIE_TYPE_ATOM_10', 512);

/**
 * All Atom
 */
define('SIMPLEPIE_TYPE_ATOM_ALL', 768);

/**
 * All feed types
 */
define('SIMPLEPIE_TYPE_ALL', 1023);

/**
 * No construct
 */
define('SIMPLEPIE_CONSTRUCT_NONE', 0);

/**
 * Text construct
 */
define('SIMPLEPIE_CONSTRUCT_TEXT', 1);

/**
 * HTML construct
 */
define('SIMPLEPIE_CONSTRUCT_HTML', 2);

/**
 * XHTML construct
 */
define('SIMPLEPIE_CONSTRUCT_XHTML', 4);

/**
 * base64-encoded construct
 */
define('SIMPLEPIE_CONSTRUCT_BASE64', 8);

/**
 * IRI construct
 */
define('SIMPLEPIE_CONSTRUCT_IRI', 16);

/**
 * A construct that might be HTML
 */
define('SIMPLEPIE_CONSTRUCT_MAYBE_HTML', 32);

/**
 * All constructs
 */
define('SIMPLEPIE_CONSTRUCT_ALL', 63);

/**
 * Don't change case
 */
define('SIMPLEPIE_SAME_CASE', 1);

/**
 * Change to lowercase
 */
define('SIMPLEPIE_LOWERCASE', 2);

/**
 * Change to uppercase
 */
define('SIMPLEPIE_UPPERCASE', 4);

/**
 * PCRE for HTML attributes
 */
define('SIMPLEPIE_PCRE_HTML_ATTRIBUTE', '((?:[\x09\x0A\x0B\x0C\x0D\x20]+[^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3D\x3E]*(?:[\x09\x0A\x0B\x0C\x0D\x20]*=[\x09\x0A\x0B\x0C\x0D\x20]*(?:"(?:[^"]*)"|\'(?:[^\']*)\'|(?:[^\x09\x0A\x0B\x0C\x0D\x20\x22\x27\x3E][^\x09\x0A\x0B\x0C\x0D\x20\x3E]*)?))?)*)[\x09\x0A\x0B\x0C\x0D\x20]*');

/**
 * PCRE for XML attributes
 */
define('SIMPLEPIE_PCRE_XML_ATTRIBUTE', '((?:\s+(?:(?:[^\s:]+:)?[^\s:]+)\s*=\s*(?:"(?:[^"]*)"|\'(?:[^\']*)\'))*)\s*');

/**
 * XML Namespace
 */
define('SIMPLEPIE_NAMESPACE_XML', 'http://www.w3.org/XML/1998/namespace');

/**
 * Atom 1.0 Namespace
 */
define('SIMPLEPIE_NAMESPACE_ATOM_10', 'http://www.w3.org/2005/Atom');

/**
 * Atom 0.3 Namespace
 */
define('SIMPLEPIE_NAMESPACE_ATOM_03', 'http://purl.org/atom/ns#');

/**
 * RDF Namespace
 */
define('SIMPLEPIE_NAMESPACE_RDF', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#');

/**
 * RSS 0.90 Namespace
 */
define('SIMPLEPIE_NAMESPACE_RSS_090', 'http://my.netscape.com/rdf/simple/0.9/');

/**
 * RSS 1.0 Namespace
 */
define('SIMPLEPIE_NAMESPACE_RSS_10', 'http://purl.org/rss/1.0/');

/**
 * RSS 1.0 Content Module Namespace
 */
define('SIMPLEPIE_NAMESPACE_RSS_10_MODULES_CONTENT', 'http://purl.org/rss/1.0/modules/content/');

/**
 * RSS 2.0 Namespace
 * (Stupid, I know, but I'm certain it will confuse people less with support.)
 */
define('SIMPLEPIE_NAMESPACE_RSS_20', '');

/**
 * DC 1.0 Namespace
 */
define('SIMPLEPIE_NAMESPACE_DC_10', 'http://purl.org/dc/elements/1.0/');

/**
 * DC 1.1 Namespace
 */
define('SIMPLEPIE_NAMESPACE_DC_11', 'http://purl.org/dc/elements/1.1/');

/**
 * W3C Basic Geo (WGS84 lat/long) Vocabulary Namespace
 */
define('SIMPLEPIE_NAMESPACE_W3C_BASIC_GEO', 'http://www.w3.org/2003/01/geo/wgs84_pos#');

/**
 * GeoRSS Namespace
 */
define('SIMPLEPIE_NAMESPACE_GEORSS', 'http://www.georss.org/georss');

/**
 * Media RSS Namespace
 */
define('SIMPLEPIE_NAMESPACE_MEDIARSS', 'http://search.yahoo.com/mrss/');

/**
 * Wrong Media RSS Namespace. Caused by a long-standing typo in the spec.
 */
define('SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG', 'http://search.yahoo.com/mrss');

/**
 * Wrong Media RSS Namespace #2. New namespace introduced in Media RSS 1.5.
 */
define('SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG2', 'http://video.search.yahoo.com/mrss');

/**
 * Wrong Media RSS Namespace #3. A possible typo of the Media RSS 1.5 namespace.
 */
define('SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG3', 'http://video.search.yahoo.com/mrss/');

/**
 * Wrong Media RSS Namespace #4. New spec location after the RSS Advisory Board takes it over, but not a valid namespace.
 */
define('SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG4', 'http://www.rssboard.org/media-rss');

/**
 * Wrong Media RSS Namespace #5. A possible typo of the RSS Advisory Board URL.
 */
define('SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG5', 'http://www.rssboard.org/media-rss/');

/**
 * iTunes RSS Namespace
 */
define('SIMPLEPIE_NAMESPACE_ITUNES', 'http://www.itunes.com/dtds/podcast-1.0.dtd');

/**
 * XHTML Namespace
 */
define('SIMPLEPIE_NAMESPACE_XHTML', 'http://www.w3.org/1999/xhtml');

/**
 * IANA Link Relations Registry
 */
define('SIMPLEPIE_IANA_LINK_RELATIONS_REGISTRY', 'http://www.iana.org/assignments/relation/');

/**
 * Whether we're running on PHP5
 */
define('SIMPLEPIE_PHP5', version_compare(PHP_VERSION, '5.0.0', '>='));

/**
 * No file source
 */
define('SIMPLEPIE_FILE_SOURCE_NONE', 0);

/**
 * Remote file source
 */
define('SIMPLEPIE_FILE_SOURCE_REMOTE', 1);

/**
 * Local file source
 */
define('SIMPLEPIE_FILE_SOURCE_LOCAL', 2);

/**
 * fsockopen() file source
 */
define('SIMPLEPIE_FILE_SOURCE_FSOCKOPEN', 4);

/**
 * cURL file source
 */
define('SIMPLEPIE_FILE_SOURCE_CURL', 8);

/**
 * file_get_contents() file source
 */
define('SIMPLEPIE_FILE_SOURCE_FILE_GET_CONTENTS', 16);

/**
 * SimplePie
 *
 * @package SimplePie
 */
class SimplePie_Core
{
	/**
	 * @var array Raw data
	 * @access private
	 */
	public $data = array();

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

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

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

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

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

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

	/**
	 * @var int Timeout for fetching remote files
	 * @see SimplePie::set_timeout()
	 * @access private
	 */
	public $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
	 */
	public $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
	 */
	public $force_feed = false;

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

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

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

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

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

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

	/**
	 * @var bool Reorder feed by date descending
	 * @see SimplePie::enable_order_by_date()
	 * @access private
	 */
	public $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
	 */
	public $input_encoding = false;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	/**
	 * @var array Stores the default attributes to be stripped by strip_attributes().
	 * @see SimplePie::strip_attributes()
	 * @access private
	 */
	public $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
	 */
	public $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
	 */
	public function __construct()
	{
		if (version_compare(PHP_VERSION, '5.0', '<'))
		{
			trigger_error('PHP 4.x is no longer supported. Please upgrade to PHP 5.2 or newer.');
			die();
		}

		// Other objects, instances created here so we can set options on them
		$this->sanitize = new SimplePie_Sanitize();

		if (func_num_args() > 0)
		{
			trigger_error('Passing parameters to the constructor is no longer supported. Please use set_feed_url(), set_cache_location(), and set_cache_location() directly.');
		}
	}

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

	/**
	 * Remove items that link back to this before destroying this object
	 */
	public 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 $enable Force the given data/URL to be treated as a feed
	 */
	public function force_feed($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 $url This is the URL (or array of URLs) that you want to parse.
	 * @see SimplePie::set_raw_data()
	 */
	public function set_feed_url($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 &$file Instance of SimplePie_File (or subclass)
	 * @return bool True on success, false on failure
	 */
	public function set_file(&$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 $data RSS or Atom data as a string.
	 * @see SimplePie::set_feed_url()
	 */
	public function set_raw_data($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 $timeout The maximum number of seconds to spend waiting to retrieve a feed.
	 */
	public function set_timeout($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 $enable Force fsockopen() to be used
	 */
	public function force_fsockopen($enable = false)
	{
		$this->force_fsockopen = (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 $enable Enable caching
	 */
	public function enable_cache($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 $seconds The feed content cache duration.
	 */
	public function set_cache_duration($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 $seconds The autodiscovered feed URL cache duration.
	 */
	public function set_autodiscovery_cache_duration($seconds = 604800)
	{
		$this->autodiscovery_cache_duration = (int) $seconds;
	}

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

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

	/**
	 * Allows you to override the character encoding reported by the feed.
	 *
	 * @access public
	 * @param string $encoding Character encoding.
	 */
	public function set_input_encoding($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 $level Feed Autodiscovery Level (level can be a
	 * combination of the above constants, see bitwise OR operator)
	 */
	public function set_autodiscovery_level($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.
	 *
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