SimplePie_Parser::parse

	{
		if (class_exists('DOMXpath') && function_exists('Mf2\parse')) {
			$doc = new DOMDocument();
			@$doc->loadHTML($data);
			$xpath = new DOMXpath($doc);
			// Check for both h-feed and h-entry, as both a feed with no entries
			// and a list of entries without an h-feed wrapper are both valid.
			$query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '.
				'contains(concat(" ", @class, " "), " h-entry ")]';
			$result = $xpath->query($query);
			if ($result->length !== 0) {
				return $this->parse_microformats($data, $url);
			}
		}

		// Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character
		if (strtoupper($encoding) === 'US-ASCII')
		{
			$this->encoding = 'UTF-8';
		}
		else
		{
			$this->encoding = $encoding;
		}

		// Strip BOM:
		// UTF-32 Big Endian BOM
		if (substr($data, 0, 4) === "\x00\x00\xFE\xFF")
		{
			$data = substr($data, 4);
		}
		// UTF-32 Little Endian BOM
		elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00")
		{
			$data = substr($data, 4);
		}
		// UTF-16 Big Endian BOM
		elseif (substr($data, 0, 2) === "\xFE\xFF")
		{
			$data = substr($data, 2);
		}
		// UTF-16 Little Endian BOM
		elseif (substr($data, 0, 2) === "\xFF\xFE")
		{
			$data = substr($data, 2);
		}
		// UTF-8 BOM
		elseif (substr($data, 0, 3) === "\xEF\xBB\xBF")
		{
			$data = substr($data, 3);
		}

		if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false)
		{
			$declaration = $this->registry->create('XML_Declaration_Parser', array(substr($data, 5, $pos - 5)));
			if ($declaration->parse())
			{
				$data = substr($data, $pos + 2);
				$data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' ."\n". $this->declare_html_entities() . $data;
			}
			else
			{
				$this->error_string = 'SimplePie bug! Please report this!';
				return false;
			}
		}

		$return = true;

		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']);
		}

		// Create the parser
		if ($xml_is_sane)
		{
			$xml = xml_parser_create_ns($this->encoding, $this->separator);
			xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);
			xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);
			xml_set_object($xml, $this);
			xml_set_character_data_handler($xml, 'cdata');
			xml_set_element_handler($xml, 'tag_open', 'tag_close');

			// Parse!
			if (!xml_parse($xml, $data, true))
			{
				$this->error_code = xml_get_error_code($xml);
				$this->error_string = xml_error_string($this->error_code);
				$return = false;
			}
			$this->current_line = xml_get_current_line_number($xml);
			$this->current_column = xml_get_current_column_number($xml);
			$this->current_byte = xml_get_current_byte_index($xml);
			xml_parser_free($xml);
			return $return;
		}

		libxml_clear_errors();
		$xml = new XMLReader();
		$xml->xml($data);
		while (@$xml->read())
		{
			switch ($xml->nodeType)
			{

				case constant('XMLReader::END_ELEMENT'):
					if ($xml->namespaceURI !== '')
					{
						$tagName = $xml->namespaceURI . $this->separator . $xml->localName;
					}
					else
					{
						$tagName = $xml->localName;
					}
					$this->tag_close(null, $tagName);
					break;
				case constant('XMLReader::ELEMENT'):
					$empty = $xml->isEmptyElement;
					if ($xml->namespaceURI !== '')
					{
						$tagName = $xml->namespaceURI . $this->separator . $xml->localName;
					}
					else
					{
						$tagName = $xml->localName;
					}
					$attributes = array();
					while ($xml->moveToNextAttribute())
					{
						if ($xml->namespaceURI !== '')
						{
							$attrName = $xml->namespaceURI . $this->separator . $xml->localName;
						}
						else
						{
							$attrName = $xml->localName;
						}
						$attributes[$attrName] = $xml->value;
					}
					$this->tag_open(null, $tagName, $attributes);
					if ($empty)
					{
						$this->tag_close(null, $tagName);
					}
					break;
				case constant('XMLReader::TEXT'):

				case constant('XMLReader::CDATA'):
					$this->cdata(null, $xml->value);
					break;
			}
		}
		if ($error = libxml_get_last_error())
		{