simplepie.php

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							$this->data = array();
						}
						// If we've got a non feed_url stored (if the page isn't actually a feed, or is a redirect) use that URL.
						elseif (isset($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 (SimplePie_Misc::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)
				{
					$this->error = $file->error;
					if (!empty($this->data))
					{
						return true;
					}
					else
					{
						return false;
					}
				}

				// 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, $this->max_checked_feeds);
				if (!$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))
					{
						if ($cache)
						{
							if (!$cache->save(array('url' => $this->feed_url, 'feed_url' => $file->url, 'build' => SIMPLEPIE_BUILD)))
							{
								trigger_error("$cache->name is not writeable", E_USER_WARNING);
							}
							$cache =& new $this->cache_class($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 $this->feed_url";
						SimplePie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
						return false;
					}
				}
				$locate = null;

				$headers = $file->headers;
				$data = trim($file->body);
				unset($file);
			}
			else
			{
				$data = $this->raw_data;
			}

			// First check to see if input has been overridden.
			if ($this->input_encoding !== false)
			{
				$encoding = $this->input_encoding;
			}
			// Second try HTTP headers
			elseif (isset($headers['content-type']) && preg_match('/;[\x09\x20]*charset=([^;]*)/i', $headers['content-type'], $charset))
			{
				$encoding = $charset[1];
			}
			// Then prolog, if at the very start of the document
			elseif (preg_match("/^<\?xml[\x20\x9\xD\xA]+version([\x20\x9\xD\xA]+)?=([\x20\x9\xD\xA]+)?(\"1.0\"|'1.0'|\"1.1\"|'1.1')[\x20\x9\xD\xA]+encoding([\x20\x9\xD\xA]+)?=([\x20\x9\xD\xA]+)?(\"[A-Za-z][A-Za-z0-9._\-]*\"|'[A-Za-z][A-Za-z0-9._\-]*')([\x20\x9\xD\xA]+standalone([\x20\x9\xD\xA]+)?=([\x20\x9\xD\xA]+)?(\"(yes|no)\"|'(yes|no)'))?([\x20\x9\xD\xA]+)?\?>/", $data, $prolog))
			{
				$encoding = substr($prolog[6], 1, -1);
			}
			// UTF-32 Big Endian BOM
			elseif (strpos($data, "\x0\x0\xFE\xFF") === 0)
			{
				$encoding = 'UTF-32be';
			}
			// UTF-32 Little Endian BOM
			elseif (strpos($data, "\xFF\xFE\x0\x0") === 0)
			{
				$encoding = 'UTF-32';
			}
			// UTF-16 Big Endian BOM
			elseif (strpos($data, "\xFE\xFF") === 0)
			{
				$encoding = 'UTF-16be';
			}
			// UTF-16 Little Endian BOM
			elseif (strpos($data, "\xFF\xFE") === 0)
			{
				$encoding = 'UTF-16le';
			}
			// UTF-8 BOM
			elseif (strpos($data, "\xEF\xBB\xBF") === 0)
			{
				$encoding = 'UTF-8';
			}
			// Fallback to the default (US-ASCII for text/xml, ISO-8859-1 for text/* MIME types, UTF-8 otherwise)
			elseif (isset($headers['content-type']) && strtolower(SimplePie_Misc::parse_mime($headers['content-type'])) == 'text/xml')
			{
				$encoding = 'US-ASCII';
			}
			elseif (isset($headers['content-type']) && SimplePie_Misc::stripos(SimplePie_Misc::parse_mime($headers['content-type']), 'text/') === 0)
			{
				$encoding = 'ISO-8859-1';
			}
			else
			{
				$encoding = 'UTF-8';
			}

			// Change the encoding to UTF-8 (as we always use UTF-8 internally)
			if ($encoding != 'UTF-8')
			{
				$data = SimplePie_Misc::change_encoding($data, $encoding, 'UTF-8');
			}

			// Strip illegal characters
			//$data = SimplePie_Misc::utf8_bad_replace($data);

			$parser =& new $this->parser_class();
			$parser->pre_process($data, 'UTF-8');
			// If we want the XML, just output that and quit
			if ($this->xml_dump)
			{
				header('Content-type: text/xml; charset=UTF-8');
				echo $data;
				exit;
			}
			// If it's parsed fine
			elseif ($parser->parse($data))
			{
				unset($data);
				$this->data = $parser->get_data();
				if (isset($this->data['child']))
				{
					if (isset($headers))
					{
						$this->data['headers'] = $headers;
					}
					$this->data['build'] = SIMPLEPIE_BUILD;

					// Cache the file if caching is enabled
					if ($cache && !$cache->save($this->data))
					{
						trigger_error("$cache->name is not writeable", E_USER_WARNING);
					}
					return true;
				}
				else
				{
					$this->error = "A feed could not be found at $this->feed_url";
					SimplePie_Misc::error($this->error, E_USER_NOTICE, __FILE__, __LINE__);
					return false;
				}
			}
			// If we have an error, just set SimplePie::error to it and quit
			else
			{
				$this->error = sprintf('XML error: %s at line %d, column %d', $parser->get_error_string(), $parser->get_current_line(), $parser->get_current_column());
				SimplePie_Misc::error($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']['']['rss']))
			{
				$this->data['type'] &= SIMPLEPIE_TYPE_RSS_ALL;
				if (isset($this->data['child']['']['rss'][0]['attribs']['']['version']))
				{
					switch (trim($this->data['child']['']['rss'][0]['attribs']['']['version']))
					{
						case '0.91':
							$this->data['type'] &= SIMPLEPIE_TYPE_RSS_091;
							if (isset($this->data['child']['']['rss'][0]['child']['']['skiphours']['hour'][0]['data']))
							{
								switch (trim($this->data['child']['']['rss'][0]['child']['']['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.
	 *
	 * @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)
			{
				$cache =& new $this->cache_class($this->cache_location, call_user_func($this->cache_name_function, $favicon), 'spi');

				if ($cache->load())
				{
					return $this->sanitize($this->favicon_handler . rawurlencode($favicon), 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->status_code == 200 || ($file->status_code > 206 && $file->status_code < 300)) && strlen($file->body) > 0)
					{
						if ($cache->save(array('headers' => $file->headers, 'body' => $file->body)))
						{
							return $this->sanitize($this->favicon_handler . rawurlencode($favicon), SIMPLEPIE_CONSTRUCT_IRI);
						}
						else
						{
							trigger_error("$cache->name is not writeable", E_USER_WARNING);
							return $this->sanitize($favicon, SIMPLEPIE_CONSTRUCT_IRI);
						}
					}
				}
			}
			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 'outlook' . $this->sanitize(SimplePie_Misc::fix_protocol($this->feed_url, 2), SIMPLEPIE_CONSTRUCT_IRI);
		}
		else
		{
			return null;
		}
	}