simplepie.php

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	function subscribe_podcast()
	{
		if ($this->feed_url !== null)
		{
			return $this->sanitize(SimplePie_Misc::fix_protocol($this->feed_url, 3), SIMPLEPIE_CONSTRUCT_IRI);
		}
		else
		{
			return null;
		}
	}

	function subscribe_itunes()
	{
		if ($this->feed_url !== null)
		{
			return $this->sanitize(SimplePie_Misc::fix_protocol($this->feed_url, 4), SIMPLEPIE_CONSTRUCT_IRI);
		}
		else
		{
			return null;
		}
	}

	/**
	 * Creates the subscribe_* methods' return data
	 *
	 * @access private
	 * @param string $feed_url String to prefix to the feed URL
	 * @param string $site_url String to prefix to the site URL (and
	 * suffix to the feed URL)
	 * @return mixed URL if feed exists, false otherwise
	 */
	function subscribe_service($feed_url, $site_url = null)
	{
		if ($this->subscribe_url())
		{
			$return = $this->sanitize($feed_url, SIMPLEPIE_CONSTRUCT_IRI) . rawurlencode($this->subscribe_url());
			if ($site_url !== null && $this->get_link() !== null)
			{
				$return .= $this->sanitize($site_url, SIMPLEPIE_CONSTRUCT_IRI) . rawurlencode($this->get_link());
			}
			return $return;
		}
		else
		{
			return null;
		}
	}

	function subscribe_aol()
	{
		return $this->subscribe_service('http://feeds.my.aol.com/add.jsp?url=');
	}

	function subscribe_bloglines()
	{
		return urldecode($this->subscribe_service('http://www.bloglines.com/sub/'));
	}

	function subscribe_eskobo()
	{
		return $this->subscribe_service('http://www.eskobo.com/?AddToMyPage=');
	}

	function subscribe_feedfeeds()
	{
		return $this->subscribe_service('http://www.feedfeeds.com/add?feed=');
	}

	function subscribe_feedster()
	{
		return $this->subscribe_service('http://www.feedster.com/myfeedster.php?action=addrss&confirm=no&rssurl=');
	}

	function subscribe_google()
	{
		return $this->subscribe_service('http://fusion.google.com/add?feedurl=');
	}

	function subscribe_gritwire()
	{
		return $this->subscribe_service('http://my.gritwire.com/feeds/addExternalFeed.aspx?FeedUrl=');
	}

	function subscribe_msn()
	{
		return $this->subscribe_service('http://my.msn.com/addtomymsn.armx?id=rss&ut=', '&ru=');
	}

	function subscribe_netvibes()
	{
		return $this->subscribe_service('http://www.netvibes.com/subscribe.php?url=');
	}

	function subscribe_newsburst()
	{
		return $this->subscribe_service('http://www.newsburst.com/Source/?add=');
	}

	function subscribe_newsgator()
	{
		return $this->subscribe_service('http://www.newsgator.com/ngs/subscriber/subext.aspx?url=');
	}

	function subscribe_odeo()
	{
		return $this->subscribe_service('http://www.odeo.com/listen/subscribe?feed=');
	}

	function subscribe_podnova()
	{
		return $this->subscribe_service('http://www.podnova.com/index_your_podcasts.srf?action=add&url=');
	}

	function subscribe_rojo()
	{
		return $this->subscribe_service('http://www.rojo.com/add-subscription?resource=');
	}

	function subscribe_yahoo()
	{
		return $this->subscribe_service('http://add.my.yahoo.com/rss?url=');
	}

	function get_feed_tags($namespace, $tag)
	{
		$type = $this->get_type();
		if ($type & SIMPLEPIE_TYPE_ATOM_10)
		{
			if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]['child'][$namespace][$tag]))
			{
				return $this->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]['child'][$namespace][$tag];
			}
		}
		if ($type & SIMPLEPIE_TYPE_ATOM_03)
		{
			if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]['child'][$namespace][$tag]))
			{
				return $this->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]['child'][$namespace][$tag];
			}
		}
		if ($type & SIMPLEPIE_TYPE_RSS_RDF)
		{
			if (isset($this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][$namespace][$tag]))
			{
				return $this->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]['child'][$namespace][$tag];
			}
		}
		if ($type & SIMPLEPIE_TYPE_RSS_SYNDICATION)
		{
			if (isset($this->data['child']['']['rss'][0]['child'][$namespace][$tag]))
			{
				return $this->data['child']['']['rss'][0]['child'][$namespace][$tag];
			}
		}
		return null;
	}

	function get_channel_tags($namespace, $tag)
	{
		$type = $this->get_type();
		if ($type & SIMPLEPIE_TYPE_ATOM_ALL)
		{
			if ($return = $this->get_feed_tags($namespace, $tag))
			{
				return $return;
			}
		}
		if ($type & SIMPLEPIE_TYPE_RSS_10)
		{
			if ($channel = $this->get_feed_tags(SIMPLEPIE_NAMESPACE_RSS_10, 'channel'))
			{
				if (isset($channel[0]['child'][$namespace][$tag]))
				{
					return $channel[0]['child'][$namespace][$tag];
				}
			}
		}
		if ($type & SIMPLEPIE_TYPE_RSS_090)
		{
			if ($channel = $this->get_feed_tags(SIMPLEPIE_NAMESPACE_RSS_090, 'channel'))
			{
				if (isset($channel[0]['child'][$namespace][$tag]))
				{
					return $channel[0]['child'][$namespace][$tag];
				}
			}
		}
		if ($type & SIMPLEPIE_TYPE_RSS_SYNDICATION)
		{
			if ($channel = $this->get_feed_tags('', 'channel'))
			{
				if (isset($channel[0]['child'][$namespace][$tag]))
				{
					return $channel[0]['child'][$namespace][$tag];
				}
			}
		}
		return null;
	}

	function get_image_tags($namespace, $tag)
	{
		$type = $this->get_type();
		if ($type & SIMPLEPIE_TYPE_RSS_10)
		{
			if ($image = $this->get_feed_tags(SIMPLEPIE_NAMESPACE_RSS_10, 'image'))
			{
				if (isset($image[0]['child'][$namespace][$tag]))
				{
					return $image[0]['child'][$namespace][$tag];
				}
			}
		}
		if ($type & SIMPLEPIE_TYPE_RSS_090)
		{
			if ($image = $this->get_feed_tags(SIMPLEPIE_NAMESPACE_RSS_090, 'image'))
			{
				if (isset($image[0]['child'][$namespace][$tag]))
				{
					return $image[0]['child'][$namespace][$tag];
				}
			}
		}
		if ($type & SIMPLEPIE_TYPE_RSS_SYNDICATION)
		{
			if ($image = $this->get_channel_tags('', 'image'))
			{
				if (isset($image[0]['child'][$namespace][$tag]))
				{
					return $image[0]['child'][$namespace][$tag];
				}
			}
		}
		return null;
	}

	function get_base($element = array())
	{
		if (!($this->get_type() & SIMPLEPIE_TYPE_RSS_SYNDICATION) && !empty($element['xml_base_explicit']) && isset($element['xml_base']))
		{
			return $element['xml_base'];
		}
		elseif ($this->get_link() !== null)
		{
			return $this->get_link();
		}
		elseif (isset($this->data['headers']['content-location']))
		{
			return SimplePie_Misc::absolutize_url($this->data['headers']['content-location'], $this->subscribe_url());
		}
		else
		{
			return $this->subscribe_url();
		}
	}

	function sanitize($data, $type, $base = '')
	{
		return $this->sanitize->sanitize($data, $type, $base);
	}

	function get_title()
	{
		if ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'title'))
		{
			return $this->sanitize($return[0]['data'], SimplePie_Misc::atom_10_construct_type($return[0]['attribs']), $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_03, 'title'))
		{
			return $this->sanitize($return[0]['data'], SimplePie_Misc::atom_03_construct_type($return[0]['attribs']), $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_RSS_10, 'title'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_RSS_090, 'title'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags('', 'title'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_DC_11, 'title'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_DC_10, 'title'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
		}
		else
		{
			return null;
		}
	}

	function get_link($key = 0, $rel = 'alternate')
	{
		$links = $this->get_links($rel);
		if (isset($links[$key]))
		{
			return $links[$key];
		}
		else
		{
			return null;
		}
	}

	/**
	 * Added for parity between the parent-level and the item/entry-level.
	 */
	function get_permalink()
	{
		return $this->get_link(0);
	}

	function get_links($rel = 'alternate')
	{
		if (!isset($this->data['links']))
		{
			$this->data['links'] = array();
			if ($links = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'link'))
			{
				foreach ($links as $link)
				{
					if (isset($link['attribs']['']['href']))
					{
						$link_rel = (isset($link['attribs']['']['rel'])) ? $link['attribs']['']['rel'] : 'alternate';
						$this->data['links'][$link_rel][] = $this->sanitize($link['attribs']['']['href'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($link));
					}
				}
			}
			if ($links = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_03, 'link'))
			{
				foreach ($links as $link)
				{
					if (isset($link['attribs']['']['href']))
					{
						$link_rel = (isset($link['attribs']['']['rel'])) ? $link['attribs']['']['rel'] : 'alternate';
						$this->data['links'][$link_rel][] = $this->sanitize($link['attribs']['']['href'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($link));

					}
				}
			}
			if ($links = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_RSS_10, 'link'))
			{
				$this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($links[0]));
			}
			if ($links = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_RSS_090, 'link'))
			{
				$this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($links[0]));
			}
			if ($links = $this->get_channel_tags('', 'link'))
			{
				$this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], SIMPLEPIE_CONSTRUCT_IRI, $this->get_base($links[0]));
			}

			$keys = array_keys($this->data['links']);
			foreach ($keys as $key)
			{
				if (SimplePie_Misc::is_isegment_nz_nc($key))
				{
					if (isset($this->data['links'][SIMPLEPIE_IANA_LINK_RELATIONS_REGISTRY . $key]))
					{
						$this->data['links'][SIMPLEPIE_IANA_LINK_RELATIONS_REGISTRY . $key] = array_merge($this->data['links'][$key], $this->data['links'][SIMPLEPIE_IANA_LINK_RELATIONS_REGISTRY . $key]);
						$this->data['links'][$key] =& $this->data['links'][SIMPLEPIE_IANA_LINK_RELATIONS_REGISTRY . $key];
					}
					else
					{
						$this->data['links'][SIMPLEPIE_IANA_LINK_RELATIONS_REGISTRY . $key] =& $this->data['links'][$key];
					}
				}
				elseif (substr($key, 0, 41) == SIMPLEPIE_IANA_LINK_RELATIONS_REGISTRY)
				{
					$this->data['links'][substr($key, 41)] =& $this->data['links'][$key];
				}
				$this->data['links'][$key] = array_unique($this->data['links'][$key]);
			}
		}

		if (isset($this->data['links'][$rel]))
		{
			return $this->data['links'][$rel];
		}
		else
		{
			return null;
		}
	}

	function get_description()
	{
		if ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'subtitle'))
		{
			return $this->sanitize($return[0]['data'], SimplePie_Misc::atom_10_construct_type($return[0]['attribs']), $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_03, 'tagline'))
		{
			return $this->sanitize($return[0]['data'], SimplePie_Misc::atom_03_construct_type($return[0]['attribs']), $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_RSS_10, 'description'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_RSS_090, 'description'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags('', 'description'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_DC_11, 'description'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_DC_10, 'description'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ITUNES, 'summary'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_HTML, $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ITUNES, 'subtitle'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_HTML, $this->get_base($return[0]));
		}
		else
		{
			return null;
		}
	}

	function get_copyright()
	{
		if ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'rights'))
		{
			return $this->sanitize($return[0]['data'], SimplePie_Misc::atom_10_construct_type($return[0]['attribs']), $this->get_base($return[0]));
		}
		elseif ($return = $this->get_channel_tags('', 'copyright'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_DC_11, 'rights'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
		}
		elseif ($return = $this->get_channel_tags(SIMPLEPIE_NAMESPACE_DC_10, 'rights'))
		{
			return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
		}
		else
		{
			return null;
		}
	}

	fun