Upgraded PHP Markdown library to version 1.7.0

library/php-markdown/License.md

@@ -1,11 +1,11 @@
 PHP Markdown Lib  
-Copyright (c) 2004-2014 Michel Fortin  
+Copyright (c) 2004-2016 Michel Fortin  
-<http://michelf.ca/>  
+<https://michelf.ca/>  
 All rights reserved.
 
 Based on Markdown  
 Copyright (c) 2003-2006 John Gruber   
-<http://daringfireball.net/>   
+<https://daringfireball.net/>   
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

library/php-markdown/Michelf/Markdown.inc.php

@@ -1,10 +1,10 @@
 <?php
 
-# Use this file if you cannot use class autoloading. It will include all the
+// Use this file if you cannot use class autoloading. It will include all the
-# files needed for the Markdown parser.
+// files needed for the Markdown parser.
-#
+//
-# Take a look at the PSR-0-compatible class autoloading implementation
+// Take a look at the PSR-0-compatible class autoloading implementation
-# in the Readme.php file if you want a simple autoloader setup.
+// in the Readme.php file if you want a simple autoloader setup.
 
 require_once dirname(__FILE__) . '/MarkdownInterface.php';
 require_once dirname(__FILE__) . '/Markdown.php';

library/php-markdown/Michelf/Markdown.php

@@ -1,147 +1,227 @@
 <?php
-#
+/**
-# Markdown  -  A text-to-HTML conversion tool for web writers
+ * Markdown  -  A text-to-HTML conversion tool for web writers
-#
+ *
-# PHP Markdown  
+ * @package   php-markdown
-# Copyright (c) 2004-2014 Michel Fortin  
+ * @author    Michel Fortin <michel.fortin@michelf.com>
-# <http://michelf.com/projects/php-markdown/>
+ * @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
-#
+ * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
-# Original Markdown  
+ */
-# Copyright (c) 2004-2006 John Gruber  
+
-# <http://daringfireball.net/projects/markdown/>
-#
 namespace Michelf;
 
-
+/**
-#
+ * Markdown Parser Class
-# Markdown Parser Class
+ */
-#
-
 class Markdown implements MarkdownInterface {
+	/**
+	 * Define the package version
+	 * @var string
+	 */
+	const MARKDOWNLIB_VERSION = "1.7.0";
 
-	### Version ###
+	/**
-
+	 * Simple function interface - Initialize the parser and return the result
-	const  MARKDOWNLIB_VERSION  =  "1.4.1";
+	 * of its transform method. This will work fine for derived classes too.
-
+	 *
-	### Simple Function Interface ###
+	 * @api
-
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
 	public static function defaultTransform($text) {
-	#
+		// Take parser class on which this function was called.
-	# Initialize the parser and return the result of its transform method.
-	# This will work fine for derived classes too.
-	#
-		# Take parser class on which this function was called.
 		$parser_class = \get_called_class();
 
-		# try to take parser from the static parser list
+		// Try to take parser from the static parser list
 		static $parser_list;
 		$parser =& $parser_list[$parser_class];
 
-		# create the parser it not already set
+		// Create the parser it not already set
-		if (!$parser)
+		if (!$parser) {
 			$parser = new $parser_class;
+		}
 
-		# Transform text using parser.
+		// Transform text using parser.
 		return $parser->transform($text);
 	}
 
-	### Configuration Variables ###
+	/**
+	 * Configuration variables
+	 */
 
-	# Change to ">" for HTML output.
+	/**
+	 * Change to ">" for HTML output.
+	 * @var string
+	 */
 	public $empty_element_suffix = " />";
+
+	/**
+	 * The width of indentation of the output markup
+	 * @var int
+	 */
 	public $tab_width = 4;
-	
+
-	# Change to `true` to disallow markup or entities.
+	/**
-	public $no_markup = false;
+	 * Change to `true` to disallow markup or entities.
+	 * @var boolean
+	 */
+	public $no_markup   = false;
 	public $no_entities = false;
-	
+
-	# Predefined urls and titles for reference links and images.
+
-	public $predef_urls = array();
+	/**
+	 * Change to `true` to enable line breaks on \n without two trailling spaces
+	 * @var boolean
+	 */
+	public $hard_wrap = false;
+
+	/**
+	 * Predefined URLs and titles for reference links and images.
+	 * @var array
+	 */
+	public $predef_urls   = array();
 	public $predef_titles = array();
 
-	# Optional filter function for URLs
+	/**
+	 * Optional filter function for URLs
+	 * @var callable
+	 */
 	public $url_filter_func = null;
 
+	/**
+	 * Optional header id="" generation callback function.
+	 * @var callable
+	 */
+	public $header_id_func = null;
 
-	### Parser Implementation ###
+	/**
+	 * Optional function for converting code block content to HTML
+	 * @var callable
+	 */
+	public $code_block_content_func = null;
 
-	# Regex to match balanced [brackets].
+	/**
-	# Needed to insert a maximum bracked depth while converting to PHP.
+	 * Optional function for converting code span content to HTML.
+	 * @var callable
+	 */
+	public $code_span_content_func = null;
+
+	/**
+	 * Class attribute to toggle "enhanced ordered list" behaviour
+	 * setting this to true will allow ordered lists to start from the index
+	 * number that is defined first.
+	 *
+	 * For example:
+	 * 2. List item two
+	 * 3. List item three
+	 *
+	 * Becomes:
+	 * <ol start="2">
+	 * <li>List item two</li>
+	 * <li>List item three</li>
+	 * </ol>
+	 *
+	 * @var bool
+	 */
+	public $enhanced_ordered_list = false;
+
+	/**
+	 * Parser implementation
+	 */
+
+	/**
+	 * Regex to match balanced [brackets].
+	 * Needed to insert a maximum bracked depth while converting to PHP.
+	 * @var int
+	 */
 	protected $nested_brackets_depth = 6;
 	protected $nested_brackets_re;
-	
+
 	protected $nested_url_parenthesis_depth = 4;
 	protected $nested_url_parenthesis_re;
 
-	# Table of hash values for escaped characters:
+	/**
+	 * Table of hash values for escaped characters:
+	 * @var string
+	 */
 	protected $escape_chars = '\`*_{}[]()>#+-.!';
 	protected $escape_chars_re;
 
-
+	/**
+	 * Constructor function. Initialize appropriate member variables.
+	 * @return void
+	 */
 	public function __construct() {
-	#
-	# Constructor function. Initialize appropriate member variables.
-	#
 		$this->_initDetab();
 		$this->prepareItalicsAndBold();
-	
+
-		$this->nested_brackets_re = 
+		$this->nested_brackets_re =
 			str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth).
 			str_repeat('\])*', $this->nested_brackets_depth);
-	
+
-		$this->nested_url_parenthesis_re = 
+		$this->nested_url_parenthesis_re =
 			str_repeat('(?>[^()\s]+|\(', $this->nested_url_parenthesis_depth).
 			str_repeat('(?>\)))*', $this->nested_url_parenthesis_depth);
-		
+
 		$this->escape_chars_re = '['.preg_quote($this->escape_chars).']';
-		
+
-		# Sort document, block, and span gamut in ascendent priority order.
+		// Sort document, block, and span gamut in ascendent priority order.
 		asort($this->document_gamut);
 		asort($this->block_gamut);
 		asort($this->span_gamut);
 	}
 
 
-	# Internal hashes used during transformation.
+	/**
-	protected $urls = array();
+	 * Internal hashes used during transformation.
-	protected $titles = array();
+	 * @var array
+	 */
+	protected $urls        = array();
+	protected $titles      = array();
 	protected $html_hashes = array();
-	
+
-	# Status flag to avoid invalid nesting.
+	/**
+	 * Status flag to avoid invalid nesting.
+	 * @var boolean
+	 */
 	protected $in_anchor = false;
-	
+
-	
+	/**
+	 * Called before the transformation process starts to setup parser states.
+	 * @return void
+	 */
 	protected function setup() {
-	#
+		// Clear global hashes.
-	# Called before the transformation process starts to setup parser 
+		$this->urls        = $this->predef_urls;
-	# states.
+		$this->titles      = $this->predef_titles;
-	#
-		# Clear global hashes.
-		$this->urls = $this->predef_urls;
-		$this->titles = $this->predef_titles;
 		$this->html_hashes = array();
-		
+		$this->in_anchor   = false;
-		$this->in_anchor = false;
 	}
-	
+
+	/**
+	 * Called after the transformation process to clear any variable which may
+	 * be taking up memory unnecessarly.
+	 * @return void
+	 */
 	protected function teardown() {
-	#
+		$this->urls        = array();
-	# Called after the transformation process to clear any variable 
+		$this->titles      = array();
-	# which may be taking up memory unnecessarly.
-	#
-		$this->urls = array();
-		$this->titles = array();
 		$this->html_hashes = array();
 	}
 
-
+	/**
+	 * Main function. Performs some preprocessing on the input text and pass
+	 * it through the document gamut.
+	 *
+	 * @api
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
 	public function transform($text) {
-	#
-	# Main function. Performs some preprocessing on the input text
-	# and pass it through the document gamut.
-	#
 		$this->setup();
-	
+
 		# Remove UTF-8 BOM and marker character in input, if present.
 		$text = preg_replace('{^\xEF\xBB\xBF|\x1A}', '', $text);
 
@@ -168,28 +248,33 @@ class Markdown implements MarkdownInterface {
 		foreach ($this->document_gamut as $method => $priority) {
 			$text = $this->$method($text);
 		}
-		
+
 		$this->teardown();
 
 		return $text . "\n";
 	}
-	
+
+	/**
+	 * Define the document gamut
+	 * @var array
+	 */
 	protected $document_gamut = array(
-		# Strip link definitions, store in hashes.
+		// Strip link definitions, store in hashes.
 		"stripLinkDefinitions" => 20,
-		
 		"runBasicBlockGamut"   => 30,
-		);
+	);
-
 
+	/**
+	 * Strips link definitions from text, stores the URLs and titles in
+	 * hash references
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function stripLinkDefinitions($text) {
-	#
+
-	# Strips link definitions from text, stores the URLs and titles in
-	# hash references.
-	#
 		$less_than_tab = $this->tab_width - 1;
 
-		# Link defs are in the form: ^[id]: url "optional title"
+		// Link defs are in the form: ^[id]: url "optional title"
 		$text = preg_replace_callback('{
 							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1
 							  [ ]*
@@ -213,43 +298,58 @@ class Markdown implements MarkdownInterface {
 							(?:\n+|\Z)
 			}xm',
 			array($this, '_stripLinkDefinitions_callback'),
-			$text);
+			$text
+		);
 		return $text;
 	}
+
+	/**
+	 * The callback to strip link definitions
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _stripLinkDefinitions_callback($matches) {
 		$link_id = strtolower($matches[1]);
 		$url = $matches[2] == '' ? $matches[3] : $matches[2];
 		$this->urls[$link_id] = $url;
 		$this->titles[$link_id] =& $matches[4];
-		return ''; # String that will replace the block
+		return ''; // String that will replace the block
 	}
 
-
+	/**
+	 * Hashify HTML blocks
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function hashHTMLBlocks($text) {
-		if ($this->no_markup)  return $text;
+		if ($this->no_markup) {
+			return $text;
+		}
 
 		$less_than_tab = $this->tab_width - 1;
 
-		# Hashify HTML blocks:
+		/**
-		# We only want to do this for block-level HTML tags, such as headers,
+		 * Hashify HTML blocks:
-		# lists, and tables. That's because we still want to wrap <p>s around
+		 *
-		# "paragraphs" that are wrapped in non-block-level tags, such as anchors,
+		 * We only want to do this for block-level HTML tags, such as headers,
-		# phrase emphasis, and spans. The list of tags we're looking for is
+		 * lists, and tables. That's because we still want to wrap <p>s around
-		# hard-coded:
+		 * "paragraphs" that are wrapped in non-block-level tags, such as
-		#
+		 * anchors, phrase emphasis, and spans. The list of tags we're looking
-		# *  List "a" is made of tags which can be both inline or block-level.
+		 * for is hard-coded:
-		#    These will be treated block-level when the start tag is alone on 
+		 *
-		#    its line, otherwise they're not matched here and will be taken as 
+		 * *  List "a" is made of tags which can be both inline or block-level.
-		#    inline later.
+		 *    These will be treated block-level when the start tag is alone on
-		# *  List "b" is made of tags which are always block-level;
+		 *    its line, otherwise they're not matched here and will be taken as
-		#
+		 *    inline later.
+		 * *  List "b" is made of tags which are always block-level;
+		 */
 		$block_tags_a_re = 'ins|del';
 		$block_tags_b_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|'.
 						   'script|noscript|style|form|fieldset|iframe|math|svg|'.
 						   'article|section|nav|aside|hgroup|header|footer|'.
 						   'figure';
 
-		# Regular expression for the content of a block tag.
+		// Regular expression for the content of a block tag.
 		$nested_tags_level = 4;
 		$attr = '
 			(?>				# optional tag attributes
@@ -263,7 +363,7 @@ class Markdown implements MarkdownInterface {
 			  |
 				\'[^\']*\'	# text inside single quotes (tolerate ">")
 			  )*
-			)?	
+			)?
 			';
 		$content =
 			str_repeat('
@@ -275,29 +375,32 @@ class Markdown implements MarkdownInterface {
 					(?>
 					  />
 					|
-					  >', $nested_tags_level).	# end of opening tag
+					  >', $nested_tags_level).	// end of opening tag
-					  '.*?'.					# last level nested tag content
+					  '.*?'.					// last level nested tag content
 			str_repeat('
 					  </\2\s*>	# closing nested tag
 					)
-				  |				
+				  |
 					<(?!/\2\s*>	# other tags with a different name
 				  )
 				)*',
 				$nested_tags_level);
 		$content2 = str_replace('\2', '\3', $content);
 
-		# First, look for nested blocks, e.g.:
+		/**
-		# 	<div>
+		 * First, look for nested blocks, e.g.:
-		# 		<div>
+		 * 	<div>
-		# 		tags for inner block must be indented.
+		 * 		<div>
-		# 		</div>
+		 * 		tags for inner block must be indented.
-		# 	</div>
+		 * 		</div>
-		#
+		 * 	</div>
-		# The outermost tags must start at the left margin for this to match, and
+		 *
-		# the inner nested divs must be indented.
+		 * The outermost tags must start at the left margin for this to match,
-		# We need to do this before the next, more liberal match, because the next
+		 * and the inner nested divs must be indented.
-		# match will start at the first `<div>` and stop at the first `</div>`.
+		 * We need to do this before the next, more liberal match, because the
+		 * next match will start at the first `<div>` and stop at the
+		 * first `</div>`.
+		 */
 		$text = preg_replace_callback('{(?>
 			(?>
 				(?<=\n)			# Starting on its own line
@@ -306,9 +409,9 @@ class Markdown implements MarkdownInterface {
 			)
 			(						# save in $1
 
-			  # Match from `\n<tag>` to `</tag>\n`, handling nested tags 
+			  # Match from `\n<tag>` to `</tag>\n`, handling nested tags
 			  # in between.
-					
+
 						[ ]{0,'.$less_than_tab.'}
 						<('.$block_tags_b_re.')# start tag = $2
 						'.$attr.'>			# attributes followed by > and \n
@@ -326,28 +429,28 @@ class Markdown implements MarkdownInterface {
 						</\3>				# the matching end tag
 						[ ]*				# trailing spaces/tabs
 						(?=\n+|\Z)	# followed by a newline or end of document
-					
+
-			| # Special case just for <hr />. It was easier to make a special 
+			| # Special case just for <hr />. It was easier to make a special
 			  # case than to make the other regex more complicated.
-			
+
 						[ ]{0,'.$less_than_tab.'}
 						<(hr)				# start tag = $2
 						'.$attr.'			# attributes
 						/?>					# the matching end tag
 						[ ]*
 						(?=\n{2,}|\Z)		# followed by a blank line or end of document
-			
+
 			| # Special case for standalone HTML comments:
-			
+
 					[ ]{0,'.$less_than_tab.'}
 					(?s:
 						<!-- .*? -->
 					)
 					[ ]*
 					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-			
+
 			| # PHP and ASP-style processor instructions (<? and <%)
-			
+
 					[ ]{0,'.$less_than_tab.'}
 					(?s:
 						<([?%])			# $2
@@ -356,98 +459,118 @@ class Markdown implements MarkdownInterface {
 					)
 					[ ]*
 					(?=\n{2,}|\Z)		# followed by a blank line or end of document
-					
+
 			)
 			)}Sxmi',
 			array($this, '_hashHTMLBlocks_callback'),
-			$text);
+			$text
+		);
 
 		return $text;
 	}
+
+	/**
+	 * The callback for hashing HTML blocks
+	 * @param  string $matches
+	 * @return string
+	 */
 	protected function _hashHTMLBlocks_callback($matches) {
 		$text = $matches[1];
 		$key  = $this->hashBlock($text);
 		return "\n\n$key\n\n";
 	}
-	
+
-	
+	/**
+	 * Called whenever a tag must be hashed when a function insert an atomic
+	 * element in the text stream. Passing $text to through this function gives
+	 * a unique text-token which will be reverted back when calling unhash.
+	 *
+	 * The $boundary argument specify what character should be used to surround
+	 * the token. By convension, "B" is used for block elements that needs not
+	 * to be wrapped into paragraph tags at the end, ":" is used for elements
+	 * that are word separators and "X" is used in the general case.
+	 *
+	 * @param  string $text
+	 * @param  string $boundary
+	 * @return string
+	 */
 	protected function hashPart($text, $boundary = 'X') {
-	#
+		// Swap back any tag hash found in $text so we do not have to `unhash`
-	# Called whenever a tag must be hashed when a function insert an atomic 
+		// multiple times at the end.
-	# element in the text stream. Passing $text to through this function gives
-	# a unique text-token which will be reverted back when calling unhash.
-	#
-	# The $boundary argument specify what character should be used to surround
-	# the token. By convension, "B" is used for block elements that needs not
-	# to be wrapped into paragraph tags at the end, ":" is used for elements
-	# that are word separators and "X" is used in the general case.
-	#
-		# Swap back any tag hash found in $text so we do not have to `unhash`
-		# multiple times at the end.
 		$text = $this->unhash($text);
-		
+
-		# Then hash the block.
+		// Then hash the block.
 		static $i = 0;
 		$key = "$boundary\x1A" . ++$i . $boundary;
 		$this->html_hashes[$key] = $text;
-		return $key; # String that will replace the tag.
+		return $key; // String that will replace the tag.
 	}
 
-
+	/**
+	 * Shortcut function for hashPart with block-level boundaries.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function hashBlock($text) {
-	#
-	# Shortcut function for hashPart with block-level boundaries.
-	#
 		return $this->hashPart($text, 'B');
 	}
 
-
+	/**
+	 * Define the block gamut - these are all the transformations that form
+	 * block-level tags like paragraphs, headers, and list items.
+	 * @var array
+	 */
 	protected $block_gamut = array(
-	#
-	# These are all the transformations that form block-level
-	# tags like paragraphs, headers, and list items.
-	#
 		"doHeaders"         => 10,
 		"doHorizontalRules" => 20,
-		
 		"doLists"           => 40,
 		"doCodeBlocks"      => 50,
 		"doBlockQuotes"     => 60,
-		);
+	);
 
+	/**
+	 * Run block gamut tranformations.
+	 *
+	 * We need to escape raw HTML in Markdown source before doing anything
+	 * else. This need to be done for each block, and not only at the
+	 * begining in the Markdown function since hashed blocks can be part of
+	 * list items and could have been indented. Indented blocks would have
+	 * been seen as a code block in a previous pass of hashHTMLBlocks.
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function runBlockGamut($text) {
-	#
-	# Run block gamut tranformations.
-	#
-		# We need to escape raw HTML in Markdown source before doing anything 
-		# else. This need to be done for each block, and not only at the 
-		# begining in the Markdown function since hashed blocks can be part of
-		# list items and could have been indented. Indented blocks would have 
-		# been seen as a code block in a previous pass of hashHTMLBlocks.
 		$text = $this->hashHTMLBlocks($text);
-		
 		return $this->runBasicBlockGamut($text);
 	}
-	
+
+	/**
+	 * Run block gamut tranformations, without hashing HTML blocks. This is
+	 * useful when HTML blocks are known to be already hashed, like in the first
+	 * whole-document pass.
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function runBasicBlockGamut($text) {
-	#
+
-	# Run block gamut tranformations, without hashing HTML blocks. This is 
-	# useful when HTML blocks are known to be already hashed, like in the first
-	# whole-document pass.
-	#
 		foreach ($this->block_gamut as $method => $priority) {
 			$text = $this->$method($text);
 		}
-		
+
-		# Finally form paragraph and restore hashed blocks.
+		// Finally form paragraph and restore hashed blocks.
 		$text = $this->formParagraphs($text);
 
 		return $text;
 	}
-	
+
-	
+	/**
+	 * Convert horizontal rules
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doHorizontalRules($text) {
-		# Do Horizontal Rules:
 		return preg_replace(
 			'{
 				^[ ]{0,3}	# Leading space
@@ -459,67 +582,82 @@ class Markdown implements MarkdownInterface {
 				[ ]*		# Tailing spaces
 				$			# End of line.
 			}mx',
-			"\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n", 
+			"\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n",
-			$text);
+			$text
+		);
 	}
 
-
+	/**
+	 * These are all the transformations that occur *within* block-level
+	 * tags like paragraphs, headers, and list items.
+	 * @var array
+	 */
 	protected $span_gamut = array(
-	#
+		// Process character escapes, code spans, and inline HTML
-	# These are all the transformations that occur *within* block-level
+		// in one shot.
-	# tags like paragraphs, headers, and list items.
-	#
-		# Process character escapes, code spans, and inline HTML
-		# in one shot.
 		"parseSpan"           => -30,
-
+		// Process anchor and image tags. Images must come first,
-		# Process anchor and image tags. Images must come first,
+		// because ![foo][f] looks like an anchor.
-		# because ![foo][f] looks like an anchor.
 		"doImages"            =>  10,
 		"doAnchors"           =>  20,
-		
+		// Make links out of things like `<https://example.com/>`
-		# Make links out of things like `<http://example.com/>`
+		// Must come after doAnchors, because you can use < and >
-		# Must come after doAnchors, because you can use < and >
+		// delimiters in inline links like [this](<url>).
-		# delimiters in inline links like [this](<url>).
 		"doAutoLinks"         =>  30,
 		"encodeAmpsAndAngles" =>  40,
-
 		"doItalicsAndBold"    =>  50,
 		"doHardBreaks"        =>  60,
-		);
+	);
 
+	/**
+	 * Run span gamut transformations
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function runSpanGamut($text) {
-	#
-	# Run span gamut tranformations.
-	#
 		foreach ($this->span_gamut as $method => $priority) {
 			$text = $this->$method($text);
 		}
 
 		return $text;
 	}
-	
+
-	
+	/**
+	 * Do hard breaks
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doHardBreaks($text) {
-		# Do hard breaks:
+		if ($this->hard_wrap) {
-		return preg_replace_callback('/ {2,}\n/', 
+			return preg_replace_callback('/ *\n/',
-			array($this, '_doHardBreaks_callback'), $text);
+				array($this, '_doHardBreaks_callback'), $text);
+		} else {
+			return preg_replace_callback('/ {2,}\n/',
+				array($this, '_doHardBreaks_callback'), $text);
+		}
 	}
+
+	/**
+	 * Trigger part hashing for the hard break (callback method)
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doHardBreaks_callback($matches) {
 		return $this->hashPart("<br$this->empty_element_suffix\n");
 	}
 
-
+	/**
+	 * Turn Markdown link shortcuts into XHTML <a> tags.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doAnchors($text) {
-	#
+		if ($this->in_anchor) {
-	# Turn Markdown link shortcuts into XHTML <a> tags.
+			return $text;
-	#
+		}
-		if ($this->in_anchor) return $text;
 		$this->in_anchor = true;
-		
+
-		#
+		// First, handle reference-style links: [link text] [id]
-		# First, handle reference-style links: [link text] [id]
-		#
 		$text = preg_replace_callback('{
 			(					# wrap whole match in $1
 			  \[
@@ -536,9 +674,7 @@ class Markdown implements MarkdownInterface {
 			}xs',
 			array($this, '_doAnchors_reference_callback'), $text);
 
-		#
+		// Next, inline-style links: [link text](url "optional title")
-		# Next, inline-style links: [link text](url "optional title")
-		#
 		$text = preg_replace_callback('{
 			(				# wrap whole match in $1
 			  \[
@@ -563,11 +699,9 @@ class Markdown implements MarkdownInterface {
 			}xs',
 			array($this, '_doAnchors_inline_callback'), $text);
 
-		#
+		// Last, handle reference-style shortcuts: [link text]
-		# Last, handle reference-style shortcuts: [link text]
+		// These must come last in case you've also got [link text][1]
-		# These must come last in case you've also got [link text][1]
+		// or [link text](/foo)
-		# or [link text](/foo)
-		#
 		$text = preg_replace_callback('{
 			(					# wrap whole match in $1
 			  \[
@@ -580,48 +714,60 @@ class Markdown implements MarkdownInterface {
 		$this->in_anchor = false;
 		return $text;
 	}
+
+	/**
+	 * Callback method to parse referenced anchors
+	 * @param  string $matches
+	 * @return string
+	 */
 	protected function _doAnchors_reference_callback($matches) {
 		$whole_match =  $matches[1];
 		$link_text   =  $matches[2];
 		$link_id     =& $matches[3];
 
 		if ($link_id == "") {
-			# for shortcut links like [this][] or [this].
+			// for shortcut links like [this][] or [this].
 			$link_id = $link_text;
 		}
-		
+
-		# lower-case and turn embedded newlines into spaces
+		// lower-case and turn embedded newlines into spaces
 		$link_id = strtolower($link_id);
 		$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
 
 		if (isset($this->urls[$link_id])) {
 			$url = $this->urls[$link_id];
 			$url = $this->encodeURLAttribute($url);
-			
+
 			$result = "<a href=\"$url\"";
 			if ( isset( $this->titles[$link_id] ) ) {
 				$title = $this->titles[$link_id];
 				$title = $this->encodeAttribute($title);
 				$result .=  " title=\"$title\"";
 			}
-		
+
 			$link_text = $this->runSpanGamut($link_text);
 			$result .= ">$link_text</a>";
 			$result = $this->hashPart($result);
-		}
+		} else {
-		else {
 			$result = $whole_match;
 		}
 		return $result;
 	}
+
+	/**
+	 * Callback method to parse inline anchors
+	 * @param  string $matches
+	 * @return string
+	 */
 	protected function _doAnchors_inline_callback($matches) {
 		$whole_match	=  $matches[1];
 		$link_text		=  $this->runSpanGamut($matches[2]);
 		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
 		$title			=& $matches[7];
 
-		// if the URL was of the form <s p a c e s> it got caught by the HTML
+		// If the URL was of the form <s p a c e s> it got caught by the HTML
-		// tag parser and hashed. Need to reverse the process before using the URL.
+		// tag parser and hashed. Need to reverse the process before using
+		// the URL.
 		$unhashed = $this->unhash($url);
 		if ($unhashed != $url)
 			$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
@@ -633,21 +779,20 @@ class Markdown implements MarkdownInterface {
 			$title = $this->encodeAttribute($title);
 			$result .=  " title=\"$title\"";
 		}
-		
+
 		$link_text = $this->runSpanGamut($link_text);
 		$result .= ">$link_text</a>";
 
 		return $this->hashPart($result);
 	}
 
-
+	/**
+	 * Turn Markdown image shortcuts into <img> tags.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doImages($text) {
-	#
+		// First, handle reference-style labeled images: ![alt text][id]
-	# Turn Markdown image shortcuts into <img> tags.
-	#
-		#
-		# First, handle reference-style labeled images: ![alt text][id]
-		#
 		$text = preg_replace_callback('{
 			(				# wrap whole match in $1
 			  !\[
@@ -662,13 +807,11 @@ class Markdown implements MarkdownInterface {
 			  \]
 
 			)
-			}xs', 
+			}xs',
 			array($this, '_doImages_reference_callback'), $text);
 
-		#
+		// Next, handle inline images:  ![alt text](url "optional title")
-		# Next, handle inline images:  ![alt text](url "optional title")
+		// Don't forget: encode * and _
-		# Don't forget: encode * and _
-		#
 		$text = preg_replace_callback('{
 			(				# wrap whole match in $1
 			  !\[
@@ -696,13 +839,19 @@ class Markdown implements MarkdownInterface {
 
 		return $text;
 	}
+
+	/**
+	 * Callback to parse references image tags
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doImages_reference_callback($matches) {
 		$whole_match = $matches[1];
 		$alt_text    = $matches[2];
 		$link_id     = strtolower($matches[3]);
 
 		if ($link_id == "") {
-			$link_id = strtolower($alt_text); # for shortcut links like ![this][].
+			$link_id = strtolower($alt_text); // for shortcut links like ![this][].
 		}
 
 		$alt_text = $this->encodeAttribute($alt_text);
@@ -716,14 +865,19 @@ class Markdown implements MarkdownInterface {
 			}
 			$result .= $this->empty_element_suffix;
 			$result = $this->hashPart($result);
-		}
+		} else {
-		else {
+			// If there's no such link ID, leave intact:
-			# If there's no such link ID, leave intact:
 			$result = $whole_match;
 		}
 
 		return $result;
 	}
+
+	/**
+	 * Callback to parse inline image tags
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doImages_inline_callback($matches) {
 		$whole_match	= $matches[1];
 		$alt_text		= $matches[2];
@@ -735,32 +889,38 @@ class Markdown implements MarkdownInterface {
 		$result = "<img src=\"$url\" alt=\"$alt_text\"";
 		if (isset($title)) {
 			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\""; # $title already quoted
+			$result .=  " title=\"$title\""; // $title already quoted
 		}
 		$result .= $this->empty_element_suffix;
 
 		return $this->hashPart($result);
 	}
 
-
+	/**
+	 * Parse Markdown heading elements to HTML
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doHeaders($text) {
-		# Setext-style headers:
+		/**
-		#	  Header 1
+		 * Setext-style headers:
-		#	  ========
+		 *	  Header 1
-		#  
+		 *	  ========
-		#	  Header 2
+		 *
-		#	  --------
+		 *	  Header 2
-		#
+		 *	  --------
+		 */
 		$text = preg_replace_callback('{ ^(.+?)[ ]*\n(=+|-+)[ ]*\n+ }mx',
 			array($this, '_doHeaders_callback_setext'), $text);
 
-		# atx-style headers:
+		/**
-		#	# Header 1
+		 * atx-style headers:
-		#	## Header 2
+		 *   # Header 1
-		#	## Header 2 with closing hashes ##
+		 *   ## Header 2
-		#	...
+		 *   ## Header 2 with closing hashes ##
-		#	###### Header 6
+		 *   ...
-		#
+		 *   ###### Header 6
+		 */
 		$text = preg_replace_callback('{
 				^(\#{1,6})	# $1 = string of #\'s
 				[ ]*
@@ -773,29 +933,72 @@ class Markdown implements MarkdownInterface {
 
 		return $text;
 	}
+
+	/**
+	 * Setext header parsing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doHeaders_callback_setext($matches) {
-		# Terrible hack to check we haven't found an empty list item.
+		// Terrible hack to check we haven't found an empty list item.
-		if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1]))
+		if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1])) {
 			return $matches[0];
-		
+		}
+
 		$level = $matches[2]{0} == '=' ? 1 : 2;
-		$block = "<h$level>".$this->runSpanGamut($matches[1])."</h$level>";
+
+		// ID attribute generation
+		$idAtt = $this->_generateIdFromHeaderValue($matches[1]);
+
+		$block = "<h$level$idAtt>".$this->runSpanGamut($matches[1])."</h$level>";
 		return "\n" . $this->hashBlock($block) . "\n\n";
 	}
+
+	/**
+	 * ATX header parsing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doHeaders_callback_atx($matches) {
+		// ID attribute generation
+		$idAtt = $this->_generateIdFromHeaderValue($matches[2]);
+
 		$level = strlen($matches[1]);
-		$block = "<h$level>".$this->runSpanGamut($matches[2])."</h$level>";
+		$block = "<h$level$idAtt>".$this->runSpanGamut($matches[2])."</h$level>";
 		return "\n" . $this->hashBlock($block) . "\n\n";
 	}
 
+	/**
+	 * If a header_id_func property is set, we can use it to automatically
+	 * generate an id attribute.
+	 *
+	 * This method returns a string in the form id="foo", or an empty string
+	 * otherwise.
+	 * @param  string $headerValue
+	 * @return string
+	 */
+	protected function _generateIdFromHeaderValue($headerValue) {
+		if (!is_callable($this->header_id_func)) {
+			return "";
+		}
 
+		$idValue = call_user_func($this->header_id_func, $headerValue);
+		if (!$idValue) {
+			return "";
+		}
+
+		return ' id="' . $this->encodeAttribute($idValue) . '"';
+	}
+
+	/**
+	 * Form HTML ordered (numbered) and unordered (bulleted) lists.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doLists($text) {
-	#
-	# Form HTML ordered (numbered) and unordered (bulleted) lists.
-	#
 		$less_than_tab = $this->tab_width - 1;
 
-		# Re-usable patterns to match list item bullets and number markers:
+		// Re-usable patterns to match list item bullets and number markers:
 		$marker_ul_re  = '[*+-]';
 		$marker_ol_re  = '\d+[\.]';
 
@@ -805,7 +1008,7 @@ class Markdown implements MarkdownInterface {
 			);
 
 		foreach ($markers_relist as $marker_re => $other_marker_re) {
-			# Re-usable pattern to match any entirel ul or ol list:
+			// Re-usable pattern to match any entirel ul or ol list:
 			$whole_list_re = '
 				(								# $1 = whole list
 				  (								# $2
@@ -832,18 +1035,17 @@ class Markdown implements MarkdownInterface {
 				  )
 				)
 			'; // mx
-			
+
-			# We use a different prefix before nested lists than top-level lists.
+			// We use a different prefix before nested lists than top-level lists.
-			# See extended comment in _ProcessListItems().
+			//See extended comment in _ProcessListItems().
-		
+
 			if ($this->list_level) {
 				$text = preg_replace_callback('{
 						^
 						'.$whole_list_re.'
 					}mx',
 					array($this, '_doLists_callback'), $text);
-			}
+			} else {
-			else {
 				$text = preg_replace_callback('{
 						(?:(?<=\n)\n|\A\n?) # Must eat the newline
 						'.$whole_list_re.'
@@ -854,55 +1056,86 @@ class Markdown implements MarkdownInterface {
 
 		return $text;
 	}
+
+	/**
+	 * List parsing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doLists_callback($matches) {
-		# Re-usable patterns to match list item bullets and number markers:
+		// Re-usable patterns to match list item bullets and number markers:
 		$marker_ul_re  = '[*+-]';
 		$marker_ol_re  = '\d+[\.]';
 		$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
-		
+		$marker_ol_start_re = '[0-9]+';
+
 		$list = $matches[1];
 		$list_type = preg_match("/$marker_ul_re/", $matches[4]) ? "ul" : "ol";
-		
+
 		$marker_any_re = ( $list_type == "ul" ? $marker_ul_re : $marker_ol_re );
-		
+
 		$list .= "\n";
 		$result = $this->processListItems($list, $marker_any_re);
-		
+
-		$result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>");
+		$ol_start = 1;
+		if ($this->enhanced_ordered_list) {
+			// Get the start number for ordered list.
+			if ($list_type == 'ol') {
+				$ol_start_array = array();
+				$ol_start_check = preg_match("/$marker_ol_start_re/", $matches[4], $ol_start_array);
+				if ($ol_start_check){
+					$ol_start = $ol_start_array[0];
+				}
+			}
+		}
+
+		if ($ol_start > 1 && $list_type == 'ol'){
+			$result = $this->hashBlock("<$list_type start=\"$ol_start\">\n" . $result . "</$list_type>");
+		} else {
+			$result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>");
+		}
 		return "\n". $result ."\n\n";
 	}
 
+	/**
+	 * Nesting tracker for list levels
+	 * @var integer
+	 */
 	protected $list_level = 0;
 
+	/**
+	 * Process the contents of a single ordered or unordered list, splitting it
+	 * into individual list items.
+	 * @param  string $list_str
+	 * @param  string $marker_any_re
+	 * @return string
+	 */
 	protected function processListItems($list_str, $marker_any_re) {
-	#
+		/**
-	#	Process the contents of a single ordered or unordered list, splitting it
+		 * The $this->list_level global keeps track of when we're inside a list.
-	#	into individual list items.
+		 * Each time we enter a list, we increment it; when we leave a list,
-	#
+		 * we decrement. If it's zero, we're not in a list anymore.
-		# The $this->list_level global keeps track of when we're inside a list.
+		 *
-		# Each time we enter a list, we increment it; when we leave a list,
+		 * We do this because when we're not inside a list, we want to treat
-		# we decrement. If it's zero, we're not in a list anymore.
+		 * something like this:
-		#
+		 *
-		# We do this because when we're not inside a list, we want to treat
+		 *		I recommend upgrading to version
-		# something like this:
+		 *		8. Oops, now this line is treated
-		#
+		 *		as a sub-list.
-		#		I recommend upgrading to version
+		 *
-		#		8. Oops, now this line is treated
+		 * As a single paragraph, despite the fact that the second line starts
-		#		as a sub-list.
+		 * with a digit-period-space sequence.
-		#
+		 *
-		# As a single paragraph, despite the fact that the second line starts
+		 * Whereas when we're inside a list (or sub-list), that line will be
-		# with a digit-period-space sequence.
+		 * treated as the start of a sub-list. What a kludge, huh? This is
-		#
+		 * an aspect of Markdown's syntax that's hard to parse perfectly
-		# Whereas when we're inside a list (or sub-list), that line will be
+		 * without resorting to mind-reading. Perhaps the solution is to
-		# treated as the start of a sub-list. What a kludge, huh? This is
+		 * change the syntax rules such that sub-lists must start with a
-		# an aspect of Markdown's syntax that's hard to parse perfectly
+		 * starting cardinal number; e.g. "1." or "a.".
-		# without resorting to mind-reading. Perhaps the solution is to
+		 */
-		# change the syntax rules such that sub-lists must start with a
-		# starting cardinal number; e.g. "1." or "a.".
-		
 		$this->list_level++;
 
-		# trim trailing blank lines:
+		// Trim trailing blank lines:
 		$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
 
 		$list_str = preg_replace_callback('{
@@ -920,6 +1153,12 @@ class Markdown implements MarkdownInterface {
 		$this->list_level--;
 		return $list_str;
 	}
+
+	/**
+	 * List item parsing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _processListItems_callback($matches) {
 		$item = $matches[4];
 		$leading_line =& $matches[1];
@@ -927,28 +1166,27 @@ class Markdown implements MarkdownInterface {
 		$marker_space = $matches[3];
 		$tailing_blank_line =& $matches[5];
 
-		if ($leading_line || $tailing_blank_line || 
+		if ($leading_line || $tailing_blank_line ||
 			preg_match('/\n{2,}/', $item))
 		{
-			# Replace marker with the appropriate whitespace indentation
+			// Replace marker with the appropriate whitespace indentation
 			$item = $leading_space . str_repeat(' ', strlen($marker_space)) . $item;
 			$item = $this->runBlockGamut($this->outdent($item)."\n");
-		}
+		} else {
-		else {
+			// Recursion for sub-lists:
-			# Recursion for sub-lists:
 			$item = $this->doLists($this->outdent($item));
-			$item = preg_replace('/\n+$/', '', $item);
+			$item = $this->formParagraphs($item, false);
-			$item = $this->runSpanGamut($item);
 		}
 
 		return "<li>" . $item . "</li>\n";
 	}
 
-
+	/**
+	 * Process Markdown `<pre><code>` blocks.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doCodeBlocks($text) {
-	#
-	#	Process Markdown `<pre><code>` blocks.
-	#
 		$text = preg_replace_callback('{
 				(?:\n\n|\A\n?)
 				(	            # $1 = the code block -- one or more lines, starting with a space/tab
@@ -963,106 +1201,141 @@ class Markdown implements MarkdownInterface {
 
 		return $text;
 	}
+
+	/**
+	 * Code block parsing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doCodeBlocks_callback($matches) {
 		$codeblock = $matches[1];
 
 		$codeblock = $this->outdent($codeblock);
-		$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
+		if ($this->code_block_content_func) {
+			$codeblock = call_user_func($this->code_block_content_func, $codeblock, "");
+		} else {
+			$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
+		}
 
 		# trim leading newlines and trailing newlines
 		$codeblock = preg_replace('/\A\n+|\n+\z/', '', $codeblock);
 
 		$codeblock = "<pre><code>$codeblock\n</code></pre>";
-		return "\n\n".$this->hashBlock($codeblock)."\n\n";
+		return "\n\n" . $this->hashBlock($codeblock) . "\n\n";
 	}
 
-
+	/**
+	 * Create a code span markup for $code. Called from handleSpanToken.
+	 * @param  string $code
+	 * @return string
+	 */
 	protected function makeCodeSpan($code) {
-	#
+		if ($this->code_span_content_func) {
-	# Create a code span markup for $code. Called from handleSpanToken.
+			$code = call_user_func($this->code_span_content_func, $code);
-	#
+		} else {
-		$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
+			$code = htmlspecialchars(trim($code), ENT_NOQUOTES);
+		}
 		return $this->hashPart("<code>$code</code>");
 	}
 
-
+	/**
+	 * Define the emphasis operators with their regex matches
+	 * @var array
+	 */
 	protected $em_relist = array(
 		''  => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?![\.,:;]?\s)',
 		'*' => '(?<![\s*])\*(?!\*)',
 		'_' => '(?<![\s_])_(?!_)',
-		);
+	);
+
+	/**
+	 * Define the strong operators with their regex matches
+	 * @var array
+	 */
 	protected $strong_relist = array(
 		''   => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?![\.,:;]?\s)',
 		'**' => '(?<![\s*])\*\*(?!\*)',
 		'__' => '(?<![\s_])__(?!_)',
-		);
+	);
+
+	/**
+	 * Define the emphasis + strong operators with their regex matches
+	 * @var array
+	 */
 	protected $em_strong_relist = array(
 		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?![\.,:;]?\s)',
 		'***' => '(?<![\s*])\*\*\*(?!\*)',
 		'___' => '(?<![\s_])___(?!_)',
-		);
+	);
+
+	/**
+	 * Container for prepared regular expressions
+	 * @var array
+	 */
 	protected $em_strong_prepared_relist;
-	
+
+	/**
+	 * Prepare regular expressions for searching emphasis tokens in any
+	 * context.
+	 * @return void
+	 */
 	protected function prepareItalicsAndBold() {
-	#
-	# Prepare regular expressions for searching emphasis tokens in any
-	# context.
-	#
 		foreach ($this->em_relist as $em => $em_re) {
 			foreach ($this->strong_relist as $strong => $strong_re) {
-				# Construct list of allowed token expressions.
+				// Construct list of allowed token expressions.
 				$token_relist = array();
 				if (isset($this->em_strong_relist["$em$strong"])) {
 					$token_relist[] = $this->em_strong_relist["$em$strong"];
 				}
 				$token_relist[] = $em_re;
 				$token_relist[] = $strong_re;
-				
+
-				# Construct master expression from list.
+				// Construct master expression from list.
-				$token_re = '{('. implode('|', $token_relist) .')}';
+				$token_re = '{(' . implode('|', $token_relist) . ')}';
 				$this->em_strong_prepared_relist["$em$strong"] = $token_re;
 			}
 		}
 	}
-	
+
+	/**
+	 * Convert Markdown italics (emphasis) and bold (strong) to HTML
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doItalicsAndBold($text) {
 		$token_stack = array('');
 		$text_stack = array('');
 		$em = '';
 		$strong = '';
 		$tree_char_em = false;
-		
+
 		while (1) {
-			#
+			// Get prepared regular expression for seraching emphasis tokens
-			# Get prepared regular expression for seraching emphasis tokens
+			// in current context.
-			# in current context.
-			#
 			$token_re = $this->em_strong_prepared_relist["$em$strong"];
-			
+
-			#
+			// Each loop iteration search for the next emphasis token.
-			# Each loop iteration search for the next emphasis token. 
+			// Each token is then passed to handleSpanToken.
-			# Each token is then passed to handleSpanToken.
-			#
 			$parts = preg_split($token_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
 			$text_stack[0] .= $parts[0];
 			$token =& $parts[1];
 			$text =& $parts[2];
-			
+
 			if (empty($token)) {
-				# Reached end of text span: empty stack without emitting.
+				// Reached end of text span: empty stack without emitting.
-				# any more emphasis.
+				// any more emphasis.
 				while ($token_stack[0]) {
 					$text_stack[1] .= array_shift($token_stack);
 					$text_stack[0] .= array_shift($text_stack);
 				}
 				break;
 			}
-			
+
 			$token_len = strlen($token);
 			if ($tree_char_em) {
-				# Reached closing marker while inside a three-char emphasis.
+				// Reached closing marker while inside a three-char emphasis.
 				if ($token_len == 3) {
-					# Three-char closing marker, close em and strong.
+					// Three-char closing marker, close em and strong.
 					array_shift($token_stack);
 					$span = array_shift($text_stack);
 					$span = $this->runSpanGamut($span);
@@ -1071,21 +1344,21 @@ class Markdown implements MarkdownInterface {
 					$em = '';
 					$strong = '';
 				} else {
-					# Other closing marker: close one em or strong and
+					// Other closing marker: close one em or strong and
-					# change current token state to match the other
+					// change current token state to match the other
 					$token_stack[0] = str_repeat($token{0}, 3-$token_len);
 					$tag = $token_len == 2 ? "strong" : "em";
 					$span = $text_stack[0];
 					$span = $this->runSpanGamut($span);
 					$span = "<$tag>$span</$tag>";
 					$text_stack[0] = $this->hashPart($span);
-					$$tag = ''; # $$tag stands for $em or $strong
+					$$tag = ''; // $$tag stands for $em or $strong
 				}
 				$tree_char_em = false;
 			} else if ($token_len == 3) {
 				if ($em) {
-					# Reached closing marker for both em and strong.
+					// Reached closing marker for both em and strong.
-					# Closing strong marker:
+					// Closing strong marker:
 					for ($i = 0; $i < 2; ++$i) {
 						$shifted_token = array_shift($token_stack);
 						$tag = strlen($shifted_token) == 2 ? "strong" : "em";
@@ -1093,11 +1366,11 @@ class Markdown implements MarkdownInterface {
 						$span = $this->runSpanGamut($span);
 						$span = "<$tag>$span</$tag>";
 						$text_stack[0] .= $this->hashPart($span);
-						$$tag = ''; # $$tag stands for $em or $strong
+						$$tag = ''; // $$tag stands for $em or $strong
 					}
 				} else {
-					# Reached opening three-char emphasis marker. Push on token 
+					// Reached opening three-char emphasis marker. Push on token
-					# stack; will be handled by the special condition above.
+					// stack; will be handled by the special condition above.
 					$em = $token{0};
 					$strong = "$em$em";
 					array_unshift($token_stack, $token);
@@ -1106,12 +1379,12 @@ class Markdown implements MarkdownInterface {
 				}
 			} else if ($token_len == 2) {
 				if ($strong) {
-					# Unwind any dangling emphasis marker:
+					// Unwind any dangling emphasis marker:
 					if (strlen($token_stack[0]) == 1) {
 						$text_stack[1] .= array_shift($token_stack);
 						$text_stack[0] .= array_shift($text_stack);
 					}
-					# Closing strong marker:
+					// Closing strong marker:
 					array_shift($token_stack);
 					$span = array_shift($text_stack);
 					$span = $this->runSpanGamut($span);
@@ -1124,10 +1397,10 @@ class Markdown implements MarkdownInterface {
 					$strong = $token;
 				}
 			} else {
-				# Here $token_len == 1
+				// Here $token_len == 1
 				if ($em) {
 					if (strlen($token_stack[0]) == 1) {
-						# Closing emphasis marker:
+						// Closing emphasis marker:
 						array_shift($token_stack);
 						$span = array_shift($text_stack);
 						$span = $this->runSpanGamut($span);
@@ -1147,7 +1420,11 @@ class Markdown implements MarkdownInterface {
 		return $text_stack[0];
 	}
 
-
+	/**
+	 * Parse Markdown blockquotes to HTML
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doBlockQuotes($text) {
 		$text = preg_replace_callback('/
 			  (								# Wrap whole match in $1
@@ -1163,51 +1440,64 @@ class Markdown implements MarkdownInterface {
 
 		return $text;
 	}
+
+	/**
+	 * Blockquote parsing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doBlockQuotes_callback($matches) {
 		$bq = $matches[1];
-		# trim one level of quoting - trim whitespace-only lines
+		// trim one level of quoting - trim whitespace-only lines
 		$bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq);
-		$bq = $this->runBlockGamut($bq);		# recurse
+		$bq = $this->runBlockGamut($bq); // recurse
 
 		$bq = preg_replace('/^/m', "  ", $bq);
-		# These leading spaces cause problem with <pre> content, 
+		// These leading spaces cause problem with <pre> content,
-		# so we need to fix that:
+		// so we need to fix that:
-		$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx', 
+		$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx',
 			array($this, '_doBlockQuotes_callback2'), $bq);
 
-		return "\n". $this->hashBlock("<blockquote>\n$bq\n</blockquote>")."\n\n";
+		return "\n" . $this->hashBlock("<blockquote>\n$bq\n</blockquote>") . "\n\n";
 	}
+
+	/**
+	 * Blockquote parsing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doBlockQuotes_callback2($matches) {
 		$pre = $matches[1];
 		$pre = preg_replace('/^  /m', '', $pre);
 		return $pre;
 	}
 
-
+	/**
-	protected function formParagraphs($text) {
+	 * Parse paragraphs
-	#
+	 *
-	#	Params:
+	 * @param  string $text String to process in paragraphs
-	#		$text - string to process with html <p> tags
+	 * @param  boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags
-	#
+	 * @return string
-		# Strip leading and trailing lines:
+	 */
+	protected function formParagraphs($text, $wrap_in_p = true) {
+		// Strip leading and trailing lines:
 		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
 
 		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
 
-		#
+		// Wrap <p> tags and unhashify HTML blocks
-		# Wrap <p> tags and unhashify HTML blocks
-		#
 		foreach ($grafs as $key => $value) {
 			if (!preg_match('/^B\x1A[0-9]+B$/', $value)) {
-				# Is a paragraph.
+				// Is a paragraph.
 				$value = $this->runSpanGamut($value);
-				$value = preg_replace('/^([ ]*)/', "<p>", $value);
+				if ($wrap_in_p) {
-				$value .= "</p>";
+					$value = preg_replace('/^([ ]*)/', "<p>", $value);
+					$value .= "</p>";
+				}
 				$grafs[$key] = $this->unhash($value);
-			}
+			} else {
-			else {
+				// Is a block.
-				# Is a block.
+				// Modify elements of @grafs in-place...
-				# Modify elements of @grafs in-place...
 				$graf = $value;
 				$block = $this->html_hashes[$graf];
 				$graf = $block;
@@ -1232,11 +1522,11 @@ class Markdown implements MarkdownInterface {
 //				{
 //					list(, $div_open, , $div_content, $div_close) = $matches;
 //
-//					# We can't call Markdown(), because that resets the hash;
+//					// We can't call Markdown(), because that resets the hash;
-//					# that initialization code should be pulled into its own sub, though.
+//					// that initialization code should be pulled into its own sub, though.
 //					$div_content = $this->hashHTMLBlocks($div_content);
-//					
+//
-//					# Run document gamut methods on the content.
+//					// Run document gamut methods on the content.
 //					foreach ($this->document_gamut as $method => $priority) {
 //						$div_content = $this->$method($div_content);
 //					}
@@ -1253,71 +1543,78 @@ class Markdown implements MarkdownInterface {
 		return implode("\n\n", $grafs);
 	}
 
-
+	/**
+	 * Encode text for a double-quoted HTML attribute. This function
+	 * is *not* suitable for attributes enclosed in single quotes.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function encodeAttribute($text) {
-	#
-	# Encode text for a double-quoted HTML attribute. This function
-	# is *not* suitable for attributes enclosed in single quotes.
-	#
 		$text = $this->encodeAmpsAndAngles($text);
 		$text = str_replace('"', '&quot;', $text);
 		return $text;
 	}
 
-
+	/**
+	 * Encode text for a double-quoted HTML attribute containing a URL,
+	 * applying the URL filter if set. Also generates the textual
+	 * representation for the URL (removing mailto: or tel:) storing it in $text.
+	 * This function is *not* suitable for attributes enclosed in single quotes.
+	 *
+	 * @param  string $url
+	 * @param  string &$text Passed by reference
+	 * @return string        URL
+	 */
 	protected function encodeURLAttribute($url, &$text = null) {
-	#
+		if ($this->url_filter_func) {
-	# Encode text for a double-quoted HTML attribute containing a URL,
-	# applying the URL filter if set. Also generates the textual
-	# representation for the URL (removing mailto: or tel:) storing it in $text.
-	# This function is *not* suitable for attributes enclosed in single quotes.
-	#
-		if ($this->url_filter_func)
 			$url = call_user_func($this->url_filter_func, $url);
+		}
 
-		if (preg_match('{^mailto:}i', $url))
+		if (preg_match('{^mailto:}i', $url)) {
 			$url = $this->encodeEntityObfuscatedAttribute($url, $text, 7);
-		else if (preg_match('{^tel:}i', $url))
+		} else if (preg_match('{^tel:}i', $url)) {
-		{
 			$url = $this->encodeAttribute($url);
 			$text = substr($url, 4);
-		}
+		} else {
-		else
-		{
 			$url = $this->encodeAttribute($url);
 			$text = $url;
 		}
 
 		return $url;
 	}
-	
+
-	
+	/**
+	 * Smart processing for ampersands and angle brackets that need to
+	 * be encoded. Valid character entities are left alone unless the
+	 * no-entities mode is set.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function encodeAmpsAndAngles($text) {
-	#
-	# Smart processing for ampersands and angle brackets that need to 
-	# be encoded. Valid character entities are left alone unless the
-	# no-entities mode is set.
-	#
 		if ($this->no_entities) {
 			$text = str_replace('&', '&amp;', $text);
 		} else {
-			# Ampersand-encoding based entirely on Nat Irons's Amputator
+			// Ampersand-encoding based entirely on Nat Irons's Amputator
-			# MT plugin: <http://bumppo.net/projects/amputator/>
+			// MT plugin: <http://bumppo.net/projects/amputator/>
-			$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/', 
+			$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/',
 								'&amp;', $text);
 		}
-		# Encode remaining <'s
+		// Encode remaining <'s
 		$text = str_replace('<', '&lt;', $text);
 
 		return $text;
 	}
 
-
+	/**
+	 * Parse Markdown automatic links to anchor HTML tags
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function doAutoLinks($text) {
 		$text = preg_replace_callback('{<((https?|ftp|dict|tel):[^\'">\s]+)>}i',
 			array($this, '_doAutoLinks_url_callback'), $text);
 
-		# Email addresses: <address@domain.foo>
+		// Email addresses: <address@domain.foo>
 		$text = preg_replace_callback('{
 			<
 			(?:mailto:)?
@@ -1340,11 +1637,23 @@ class Markdown implements MarkdownInterface {
 
 		return $text;
 	}
+
+	/**
+	 * Parse URL callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doAutoLinks_url_callback($matches) {
 		$url = $this->encodeURLAttribute($matches[1], $text);
 		$link = "<a href=\"$url\">$text</a>";
 		return $this->hashPart($link);
 	}
+
+	/**
+	 * Parse email address callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _doAutoLinks_email_callback($matches) {
 		$addr = $matches[1];
 		$url = $this->encodeURLAttribute("mailto:$addr", $text);
@@ -1352,42 +1661,52 @@ class Markdown implements MarkdownInterface {
 		return $this->hashPart($link);
 	}
 
-
+	/**
+	 * Input: some text to obfuscate, e.g. "mailto:foo@example.com"
+	 *
+	 * Output: the same text but with most characters encoded as either a
+	 *         decimal or hex entity, in the hopes of foiling most address
+	 *         harvesting spam bots. E.g.:
+	 *
+	 *        &#109;&#x61;&#105;&#x6c;&#116;&#x6f;&#58;&#x66;o&#111;
+	 *        &#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;&#101;&#46;&#x63;&#111;
+	 *        &#x6d;
+	 *
+	 * Note: the additional output $tail is assigned the same value as the
+	 * ouput, minus the number of characters specified by $head_length.
+	 *
+	 * Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
+	 * With some optimizations by Milian Wolff. Forced encoding of HTML
+	 * attribute special characters by Allan Odgaard.
+	 *
+	 * @param  string  $text
+	 * @param  string  &$tail
+	 * @param  integer $head_length
+	 * @return string
+	 */
 	protected function encodeEntityObfuscatedAttribute($text, &$tail = null, $head_length = 0) {
-	#
+		if ($text == "") {
-	#	Input: some text to obfuscate, e.g. "mailto:foo@example.com"
+			return $tail = "";
-	#
+		}
-	#	Output: the same text but with most characters encoded as either a
-	#		decimal or hex entity, in the hopes of foiling most address
-	#		harvesting spam bots. E.g.:
-	#
-	#        &#109;&#x61;&#105;&#x6c;&#116;&#x6f;&#58;&#x66;o&#111;
-	#        &#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;&#101;&#46;&#x63;&#111;
-	#        &#x6d;
-	#
-	#	Note: the additional output $tail is assigned the same value as the
-	#	ouput, minus the number of characters specified by $head_length.
-	#
-	#	Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
-	#   With some optimizations by Milian Wolff. Forced encoding of HTML
-	#	attribute special characters by Allan Odgaard.
-	#
-		if ($text == "") return $tail = "";
 
 		$chars = preg_split('/(?<!^)(?!$)/', $text);
-		$seed = (int)abs(crc32($text) / strlen($text)); # Deterministic seed.
+		$seed = (int)abs(crc32($text) / strlen($text)); // Deterministic seed.
 
 		foreach ($chars as $key => $char) {
 			$ord = ord($char);
-			# Ignore non-ascii chars.
+			// Ignore non-ascii chars.
 			if ($ord < 128) {
-				$r = ($seed * (1 + $key)) % 100; # Pseudo-random function.
+				$r = ($seed * (1 + $key)) % 100; // Pseudo-random function.
-				# roughly 10% raw, 45% hex, 45% dec
+				// roughly 10% raw, 45% hex, 45% dec
-				# '@' *must* be encoded. I insist.
+				// '@' *must* be encoded. I insist.
-				# '"' and '>' have to be encoded inside the attribute
+				// '"' and '>' have to be encoded inside the attribute
-				if ($r > 90 && strpos('@"&>', $char) === false) /* do nothing */;
+				if ($r > 90 && strpos('@"&>', $char) === false) {
-				else if ($r < 45) $chars[$key] = '&#x'.dechex($ord).';';
+					/* do nothing */
-				else              $chars[$key] = '&#'.$ord.';';
+				} else if ($r < 45) {
+					$chars[$key] = '&#x'.dechex($ord).';';
+				} else {
+					$chars[$key] = '&#'.$ord.';';
+				}
 			}
 		}
 
@@ -1397,14 +1716,15 @@ class Markdown implements MarkdownInterface {
 		return $text;
 	}
 
-
+	/**
+	 * Take the string $str and parse it into tokens, hashing embeded HTML,
+	 * escaped characters and handling code spans.
+	 * @param  string $str
+	 * @return string
+	 */
 	protected function parseSpan($str) {
-	#
-	# Take the string $str and parse it into tokens, hashing embeded HTML,
-	# escaped characters and handling code spans.
-	#
 		$output = '';
-		
+
 		$span_re = '{
 				(
 					\\\\'.$this->escape_chars_re.'
@@ -1432,1720 +1752,145 @@ class Markdown implements MarkdownInterface {
 				}xs';
 
 		while (1) {
-			#
+			// Each loop iteration seach for either the next tag, the next
-			# Each loop iteration seach for either the next tag, the next 
+			// openning code span marker, or the next escaped character.
-			# openning code span marker, or the next escaped character. 
+			// Each token is then passed to handleSpanToken.
-			# Each token is then passed to handleSpanToken.
-			#
 			$parts = preg_split($span_re, $str, 2, PREG_SPLIT_DELIM_CAPTURE);
-			
+
-			# Create token from text preceding tag.
+			// Create token from text preceding tag.
 			if ($parts[0] != "") {
 				$output .= $parts[0];
 			}
-			
+
-			# Check if we reach the end.
+			// Check if we reach the end.
 			if (isset($parts[1])) {
 				$output .= $this->handleSpanToken($parts[1], $parts[2]);
 				$str = $parts[2];
-			}
+			} else {
-			else {
 				break;
 			}
 		}
-		
+
 		return $output;
 	}
-	
+
-	
+	/**
+	 * Handle $token provided by parseSpan by determining its nature and
+	 * returning the corresponding value that should replace it.
+	 * @param  string $token
+	 * @param  string &$str
+	 * @return string
+	 */
 	protected function handleSpanToken($token, &$str) {
-	#
-	# Handle $token provided by parseSpan by determining its nature and 
-	# returning the corresponding value that should replace it.
-	#
 		switch ($token{0}) {
 			case "\\":
 				return $this->hashPart("&#". ord($token{1}). ";");
 			case "`":
-				# Search for end marker in remaining text.
+				// Search for end marker in remaining text.
-				if (preg_match('/^(.*?[^`])'.preg_quote($token).'(?!`)(.*)$/sm', 
+				if (preg_match('/^(.*?[^`])'.preg_quote($token).'(?!`)(.*)$/sm',
 					$str, $matches))
 				{
 					$str = $matches[2];
 					$codespan = $this->makeCodeSpan($matches[1]);
 					return $this->hashPart($codespan);
 				}
-				return $token; // return as text since no ending marker found.
+				return $token; // Return as text since no ending marker found.
 			default:
 				return $this->hashPart($token);
 		}
 	}
 
-
+	/**
+	 * Remove one level of line-leading tabs or spaces
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function outdent($text) {
-	#
+		return preg_replace('/^(\t|[ ]{1,' . $this->tab_width . '})/m', '', $text);
-	# Remove one level of line-leading tabs or spaces
-	#
-		return preg_replace('/^(\t|[ ]{1,'.$this->tab_width.'})/m', '', $text);
 	}
 
 
-	# String length function for detab. `_initDetab` will create a function to 
+	/**
-	# hanlde UTF-8 if the default function does not exist.
+	 * String length function for detab. `_initDetab` will create a function to
+	 * handle UTF-8 if the default function does not exist.
+	 * @var string
+	 */
 	protected $utf8_strlen = 'mb_strlen';
-	
+
+	/**
+	 * Replace tabs with the appropriate amount of spaces.
+	 *
+	 * For each line we separate the line in blocks delemited by tab characters.
+	 * Then we reconstruct every line by adding the  appropriate number of space
+	 * between each blocks.
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function detab($text) {
-	#
-	# Replace tabs with the appropriate amount of space.
-	#
-		# For each line we separate the line in blocks delemited by
-		# tab characters. Then we reconstruct every line by adding the 
-		# appropriate number of space between each blocks.
-		
 		$text = preg_replace_callback('/^.*\t.*$/m',
 			array($this, '_detab_callback'), $text);
 
 		return $text;
 	}
+
+	/**
+	 * Replace tabs callback
+	 * @param  string $matches
+	 * @return string
+	 */
 	protected function _detab_callback($matches) {
 		$line = $matches[0];
-		$strlen = $this->utf8_strlen; # strlen function for UTF-8.
+		$strlen = $this->utf8_strlen; // strlen function for UTF-8.
-		
+
-		# Split in blocks.
+		// Split in blocks.
 		$blocks = explode("\t", $line);
-		# Add each blocks to the line.
+		// Add each blocks to the line.
 		$line = $blocks[0];
-		unset($blocks[0]); # Do not add first block twice.
+		unset($blocks[0]); // Do not add first block twice.
 		foreach ($blocks as $block) {
-			# Calculate amount of space, insert spaces, insert block.
+			// Calculate amount of space, insert spaces, insert block.
-			$amount = $this->tab_width - 
+			$amount = $this->tab_width -
 				$strlen($line, 'UTF-8') % $this->tab_width;
 			$line .= str_repeat(" ", $amount) . $block;
 		}
 		return $line;
 	}
+
+	/**
+	 * Check for the availability of the function in the `utf8_strlen` property
+	 * (initially `mb_strlen`). If the function is not available, create a
+	 * function that will loosely count the number of UTF-8 characters with a
+	 * regular expression.
+	 * @return void
+	 */
 	protected function _initDetab() {
-	#
+
-	# Check for the availability of the function in the `utf8_strlen` property
+		if (function_exists($this->utf8_strlen)) {
-	# (initially `mb_strlen`). If the function is not available, create a 
+			return;
-	# function that will loosely count the number of UTF-8 characters with a
+		}
-	# regular expression.
+
-	#
-		if (function_exists($this->utf8_strlen)) return;
 		$this->utf8_strlen = create_function('$text', 'return preg_match_all(
-			"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/", 
+			"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/",
 			$text, $m);');
 	}
 
-
+	/**
+	 * Swap back in all the tags hashed by _HashHTMLBlocks.
+	 * @param  string $text
+	 * @return string
+	 */
 	protected function unhash($text) {
-	#
+		return preg_replace_callback('/(.)\x1A[0-9]+\1/',
-	# Swap back in all the tags hashed by _HashHTMLBlocks.
-	#
-		return preg_replace_callback('/(.)\x1A[0-9]+\1/', 
 			array($this, '_unhash_callback'), $text);
 	}
+
+	/**
+	 * Unhashing callback
+	 * @param  array $matches
+	 * @return string
+	 */
 	protected function _unhash_callback($matches) {
 		return $this->html_hashes[$matches[0]];
 	}
-
-}
-
-
-#
-# Temporary Markdown Extra Parser Implementation Class
-#
-# NOTE: DON'T USE THIS CLASS
-# Currently the implementation of of Extra resides here in this temporary class.
-# This makes it easier to propagate the changes between the three different
-# packaging styles of PHP Markdown. When this issue is resolved, this
-# MarkdownExtra_TmpImpl class here will disappear and \Michelf\MarkdownExtra
-# will contain the code. So please use \Michelf\MarkdownExtra and ignore this
-# one.
-#
-
-abstract class _MarkdownExtra_TmpImpl extends \Michelf\Markdown {
-
-	### Configuration Variables ###
-
-	# Prefix for footnote ids.
-	public $fn_id_prefix = "";
-	
-	# Optional title attribute for footnote links and backlinks.
-	public $fn_link_title = "";
-	public $fn_backlink_title = "";
-	
-	# Optional class attribute for footnote links and backlinks.
-	public $fn_link_class = "footnote-ref";
-	public $fn_backlink_class = "footnote-backref";
-
-	# Class name for table cell alignment (%% replaced left/center/right)
-	# For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
-	# If empty, the align attribute is used instead of a class name.
-	public $table_align_class_tmpl = '';
-
-	# Optional class prefix for fenced code block.
-	public $code_class_prefix = "";
-	# Class attribute for code blocks goes on the `code` tag;
-	# setting this to true will put attributes on the `pre` tag instead.
-	public $code_attr_on_pre = false;
-	
-	# Predefined abbreviations.
-	public $predef_abbr = array();
-
-
-	### Parser Implementation ###
-
-	public function __construct() {
-	#
-	# Constructor function. Initialize the parser object.
-	#
-		# Add extra escapable characters before parent constructor 
-		# initialize the table.
-		$this->escape_chars .= ':|';
-		
-		# Insert extra document, block, and span transformations. 
-		# Parent constructor will do the sorting.
-		$this->document_gamut += array(
-			"doFencedCodeBlocks" => 5,
-			"stripFootnotes"     => 15,
-			"stripAbbreviations" => 25,
-			"appendFootnotes"    => 50,
-			);
-		$this->block_gamut += array(
-			"doFencedCodeBlocks" => 5,
-			"doTables"           => 15,
-			"doDefLists"         => 45,
-			);
-		$this->span_gamut += array(
-			"doFootnotes"        => 5,
-			"doAbbreviations"    => 70,
-			);
-		
-		parent::__construct();
-	}
-	
-	
-	# Extra variables used during extra transformations.
-	protected $footnotes = array();
-	protected $footnotes_ordered = array();
-	protected $footnotes_ref_count = array();
-	protected $footnotes_numbers = array();
-	protected $abbr_desciptions = array();
-	protected $abbr_word_re = '';
-	
-	# Give the current footnote number.
-	protected $footnote_counter = 1;
-	
-	
-	protected function setup() {
-	#
-	# Setting up Extra-specific variables.
-	#
-		parent::setup();
-		
-		$this->footnotes = array();
-		$this->footnotes_ordered = array();
-		$this->footnotes_ref_count = array();
-		$this->footnotes_numbers = array();
-		$this->abbr_desciptions = array();
-		$this->abbr_word_re = '';
-		$this->footnote_counter = 1;
-		
-		foreach ($this->predef_abbr as $abbr_word => $abbr_desc) {
-			if ($this->abbr_word_re)
-				$this->abbr_word_re .= '|';
-			$this->abbr_word_re .= preg_quote($abbr_word);
-			$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
-		}
-	}
-	
-	protected function teardown() {
-	#
-	# Clearing Extra-specific variables.
-	#
-		$this->footnotes = array();
-		$this->footnotes_ordered = array();
-		$this->footnotes_ref_count = array();
-		$this->footnotes_numbers = array();
-		$this->abbr_desciptions = array();
-		$this->abbr_word_re = '';
-		
-		parent::teardown();
-	}
-	
-	
-	### Extra Attribute Parser ###
-
-	# Expression to use to catch attributes (includes the braces)
-	protected $id_class_attr_catch_re = '\{((?:[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
-	# Expression to use when parsing in a context when no capture is desired
-	protected $id_class_attr_nocatch_re = '\{(?:[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
-
-	protected function doExtraAttributes($tag_name, $attr) {
-	#
-	# Parse attributes caught by the $this->id_class_attr_catch_re expression
-	# and return the HTML-formatted list of attributes.
-	#
-	# Currently supported attributes are .class and #id.
-	#
-		if (empty($attr)) return "";
-		
-		# Split on components
-		preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches);
-		$elements = $matches[0];
-
-		# handle classes and ids (only first id taken into account)
-		$classes = array();
-		$attributes = array();
-		$id = false;
-		foreach ($elements as $element) {
-			if ($element{0} == '.') {
-				$classes[] = substr($element, 1);
-			} else if ($element{0} == '#') {
-				if ($id === false) $id = substr($element, 1);
-			} else if (strpos($element, '=') > 0) {
-				$parts = explode('=', $element, 2);
-				$attributes[] = $parts[0] . '="' . $parts[1] . '"';
-			}
-		}
-
-		# compose attributes as string
-		$attr_str = "";
-		if (!empty($id)) {
-			$attr_str .= ' id="'.$id.'"';
-		}
-		if (!empty($classes)) {
-			$attr_str .= ' class="'.implode(" ", $classes).'"';
-		}
-		if (!$this->no_markup && !empty($attributes)) {
-			$attr_str .= ' '.implode(" ", $attributes);
-		}
-		return $attr_str;
-	}
-
-
-	protected function stripLinkDefinitions($text) {
-	#
-	# Strips link definitions from text, stores the URLs and titles in
-	# hash references.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Link defs are in the form: ^[id]: url "optional title"
-		$text = preg_replace_callback('{
-							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1
-							  [ ]*
-							  \n?				# maybe *one* newline
-							  [ ]*
-							(?:
-							  <(.+?)>			# url = $2
-							|
-							  (\S+?)			# url = $3
-							)
-							  [ ]*
-							  \n?				# maybe one newline
-							  [ ]*
-							(?:
-								(?<=\s)			# lookbehind for whitespace
-								["(]
-								(.*?)			# title = $4
-								[")]
-								[ ]*
-							)?	# title is optional
-					(?:[ ]* '.$this->id_class_attr_catch_re.' )?  # $5 = extra id & class attr
-							(?:\n+|\Z)
-			}xm',
-			array($this, '_stripLinkDefinitions_callback'),
-			$text);
-		return $text;
-	}
-	protected function _stripLinkDefinitions_callback($matches) {
-		$link_id = strtolower($matches[1]);
-		$url = $matches[2] == '' ? $matches[3] : $matches[2];
-		$this->urls[$link_id] = $url;
-		$this->titles[$link_id] =& $matches[4];
-		$this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]);
-		return ''; # String that will replace the block
-	}
-
-
-	### HTML Block Parser ###
-	
-	# Tags that are always treated as block tags:
-	protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure';
-						   
-	# Tags treated as block tags only if the opening tag is alone on its line:
-	protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
-	
-	# Tags where markdown="1" default to span mode:
-	protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
-	
-	# Tags which must not have their contents modified, no matter where 
-	# they appear:
-	protected $clean_tags_re = 'script|style|math|svg';
-	
-	# Tags that do not need to be closed.
-	protected $auto_close_tags_re = 'hr|img|param|source|track';
-	
-
-	protected function hashHTMLBlocks($text) {
-	#
-	# Hashify HTML Blocks and "clean tags".
-	#
-	# We only want to do this for block-level HTML tags, such as headers,
-	# lists, and tables. That's because we still want to wrap <p>s around
-	# "paragraphs" that are wrapped in non-block-level tags, such as anchors,
-	# phrase emphasis, and spans. The list of tags we're looking for is
-	# hard-coded.
-	#
-	# This works by calling _HashHTMLBlocks_InMarkdown, which then calls
-	# _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1" 
-	# attribute is found within a tag, _HashHTMLBlocks_InHTML calls back
-	#  _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
-	# These two functions are calling each other. It's recursive!
-	#
-		if ($this->no_markup)  return $text;
-
-		#
-		# Call the HTML-in-Markdown hasher.
-		#
-		list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
-		
-		return $text;
-	}
-	protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0,
-										$enclosing_tag_re = '', $span = false)
-	{
-	#
-	# Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags.
-	#
-	# *   $indent is the number of space to be ignored when checking for code 
-	#     blocks. This is important because if we don't take the indent into 
-	#     account, something like this (which looks right) won't work as expected:
-	#
-	#     <div>
-	#         <div markdown="1">
-	#         Hello World.  <-- Is this a Markdown code block or text?
-	#         </div>  <-- Is this a Markdown code block or a real tag?
-	#     <div>
-	#
-	#     If you don't like this, just don't indent the tag on which
-	#     you apply the markdown="1" attribute.
-	#
-	# *   If $enclosing_tag_re is not empty, stops at the first unmatched closing 
-	#     tag with that name. Nested tags supported.
-	#
-	# *   If $span is true, text inside must treated as span. So any double 
-	#     newline will be replaced by a single newline so that it does not create 
-	#     paragraphs.
-	#
-	# Returns an array of that form: ( processed text , remaining text )
-	#
-		if ($text === '') return array('', '');
-
-		# Regex to check for the presense of newlines around a block tag.
-		$newline_before_re = '/(?:^\n?|\n\n)*$/';
-		$newline_after_re = 
-			'{
-				^						# Start of text following the tag.
-				(?>[ ]*<!--.*?-->)?		# Optional comment.
-				[ ]*\n					# Must be followed by newline.
-			}xs';
-		
-		# Regex to match any tag.
-		$block_tag_re =
-			'{
-				(					# $2: Capture whole tag.
-					</?					# Any opening or closing tag.
-						(?>				# Tag name.
-							'.$this->block_tags_re.'			|
-							'.$this->context_block_tags_re.'	|
-							'.$this->clean_tags_re.'        	|
-							(?!\s)'.$enclosing_tag_re.'
-						)
-						(?:
-							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
-							(?>
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-					<!--    .*?     -->	# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-					<!\[CDATA\[.*?\]\]>	# CData Block
-				'. ( !$span ? ' # If not in span.
-				|
-					# Indented code block
-					(?: ^[ ]*\n | ^ | \n[ ]*\n )
-					[ ]{'.($indent+4).'}[^\n]* \n
-					(?>
-						(?: [ ]{'.($indent+4).'}[^\n]* | [ ]* ) \n
-					)*
-				|
-					# Fenced code block marker
-					(?<= ^ | \n )
-					[ ]{0,'.($indent+3).'}(?:~{3,}|`{3,})
-									[ ]*
-					(?:
-					\.?[-_:a-zA-Z0-9]+ # standalone class name
-					|
-						'.$this->id_class_attr_nocatch_re.' # extra attributes
-					)?
-					[ ]*
-					(?= \n )
-				' : '' ). ' # End (if not is span).
-				|
-					# Code span marker
-					# Note, this regex needs to go after backtick fenced
-					# code blocks but it should also be kept outside of the
-					# "if not in span" condition adding backticks to the parser
-					`+
-				)
-			}xs';
-
-		
-		$depth = 0;		# Current depth inside the tag tree.
-		$parsed = "";	# Parsed text that will be returned.
-
-		#
-		# Loop through every tag until we find the closing tag of the parent
-		# or loop until reaching the end of text if no parent tag specified.
-		#
-		do {
-			#
-			# Split the text using the first $tag_match pattern found.
-			# Text before  pattern will be first in the array, text after
-			# pattern will be at the end, and between will be any catches made 
-			# by the pattern.
-			#
-			$parts = preg_split($block_tag_re, $text, 2, 
-								PREG_SPLIT_DELIM_CAPTURE);
-			
-			# If in Markdown span mode, add a empty-string span-level hash 
-			# after each newline to prevent triggering any block element.
-			if ($span) {
-				$void = $this->hashPart("", ':');
-				$newline = "$void\n";
-				$parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void;
-			}
-			
-			$parsed .= $parts[0]; # Text before current tag.
-			
-			# If end of $text has been reached. Stop loop.
-			if (count($parts) < 3) {
-				$text = "";
-				break;
-			}
-			
-			$tag  = $parts[1]; # Tag to handle.
-			$text = $parts[2]; # Remaining text after current tag.
-			$tag_re = preg_quote($tag); # For use in a regular expression.
-			
-			#
-			# Check for: Fenced code block marker.
-			# Note: need to recheck the whole tag to disambiguate backtick
-			# fences from code spans
-			#
-			if (preg_match('{^\n?([ ]{0,'.($indent+3).'})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+|'.$this->id_class_attr_nocatch_re.')?[ ]*\n?$}', $tag, $capture)) {
-				# Fenced code block marker: find matching end marker.
-				$fence_indent = strlen($capture[1]); # use captured indent in re
-				$fence_re = $capture[2]; # use captured fence in re
-				if (preg_match('{^(?>.*\n)*?[ ]{'.($fence_indent).'}'.$fence_re.'[ ]*(?:\n|$)}', $text,
-					$matches)) 
-				{
-					# End marker found: pass text unchanged until marker.
-					$parsed .= $tag . $matches[0];
-					$text = substr($text, strlen($matches[0]));
-				}
-				else {
-					# No end marker: just skip it.
-					$parsed .= $tag;
-				}
-			}
-			#
-			# Check for: Indented code block.
-			#
-			else if ($tag{0} == "\n" || $tag{0} == " ") {
-				# Indented code block: pass it unchanged, will be handled 
-				# later.
-				$parsed .= $tag;
-			}
-			#
-			# Check for: Code span marker
-			# Note: need to check this after backtick fenced code blocks
-			#
-			else if ($tag{0} == "`") {
-				# Find corresponding end marker.
-				$tag_re = preg_quote($tag);
-				if (preg_match('{^(?>.+?|\n(?!\n))*?(?<!`)'.$tag_re.'(?!`)}',
-					$text, $matches))
-				{
-					# End marker found: pass text unchanged until marker.
-					$parsed .= $tag . $matches[0];
-					$text = substr($text, strlen($matches[0]));
-				}
-				else {
-					# Unmatched marker: just skip it.
-					$parsed .= $tag;
-				}
-			}
-			#
-			# Check for: Opening Block level tag or
-			#            Opening Context Block tag (like ins and del) 
-			#               used as a block tag (tag is alone on it's line).
-			#
-			else if (preg_match('{^<(?:'.$this->block_tags_re.')\b}', $tag) ||
-				(	preg_match('{^<(?:'.$this->context_block_tags_re.')\b}', $tag) &&
-					preg_match($newline_before_re, $parsed) &&
-					preg_match($newline_after_re, $text)	)
-				)
-			{
-				# Need to parse tag and following text using the HTML parser.
-				list($block_text, $text) = 
-					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true);
-				
-				# Make sure it stays outside of any paragraph by adding newlines.
-				$parsed .= "\n\n$block_text\n\n";
-			}
-			#
-			# Check for: Clean tag (like script, math)
-			#            HTML Comments, processing instructions.
-			#
-			else if (preg_match('{^<(?:'.$this->clean_tags_re.')\b}', $tag) ||
-				$tag{1} == '!' || $tag{1} == '?')
-			{
-				# Need to parse tag and following text using the HTML parser.
-				# (don't check for markdown attribute)
-				list($block_text, $text) = 
-					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false);
-				
-				$parsed .= $block_text;
-			}
-			#
-			# Check for: Tag with same name as enclosing tag.
-			#
-			else if ($enclosing_tag_re !== '' &&
-				# Same name as enclosing tag.
-				preg_match('{^</?(?:'.$enclosing_tag_re.')\b}', $tag))
-			{
-				#
-				# Increase/decrease nested tag count.
-				#
-				if ($tag{1} == '/')						$depth--;
-				else if ($tag{strlen($tag)-2} != '/')	$depth++;
-
-				if ($depth < 0) {
-					#
-					# Going out of parent element. Clean up and break so we
-					# return to the calling function.
-					#
-					$text = $tag . $text;
-					break;
-				}
-				
-				$parsed .= $tag;
-			}
-			else {
-				$parsed .= $tag;
-			}
-		} while ($depth >= 0);
-		
-		return array($parsed, $text);
-	}
-	protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) {
-	#
-	# Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags.
-	#
-	# *   Calls $hash_method to convert any blocks.
-	# *   Stops when the first opening tag closes.
-	# *   $md_attr indicate if the use of the `markdown="1"` attribute is allowed.
-	#     (it is not inside clean tags)
-	#
-	# Returns an array of that form: ( processed text , remaining text )
-	#
-		if ($text === '') return array('', '');
-		
-		# Regex to match `markdown` attribute inside of a tag.
-		$markdown_attr_re = '
-			{
-				\s*			# Eat whitespace before the `markdown` attribute
-				markdown
-				\s*=\s*
-				(?>
-					(["\'])		# $1: quote delimiter		
-					(.*?)		# $2: attribute value
-					\1			# matching delimiter	
-				|
-					([^\s>]*)	# $3: unquoted attribute value
-				)
-				()				# $4: make $3 always defined (avoid warnings)
-			}xs';
-		
-		# Regex to match any tag.
-		$tag_re = '{
-				(					# $2: Capture whole tag.
-					</?					# Any opening or closing tag.
-						[\w:$]+			# Tag name.
-						(?:
-							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
-							(?>
-								".*?"		|	# Double quotes (can contain `>`)
-								\'.*?\'   	|	# Single quotes (can contain `>`)
-								.+?				# Anything but quotes and `>`.
-							)*?
-						)?
-					>					# End of tag.
-				|
-					<!--    .*?     -->	# HTML Comment
-				|
-					<\?.*?\?> | <%.*?%>	# Processing instruction
-				|
-					<!\[CDATA\[.*?\]\]>	# CData Block
-				)
-			}xs';
-		
-		$original_text = $text;		# Save original text in case of faliure.
-		
-		$depth		= 0;	# Current depth inside the tag tree.
-		$block_text	= "";	# Temporary text holder for current text.
-		$parsed		= "";	# Parsed text that will be returned.
-
-		#
-		# Get the name of the starting tag.
-		# (This pattern makes $base_tag_name_re safe without quoting.)
-		#
-		if (preg_match('/^<([\w:$]*)\b/', $text, $matches))
-			$base_tag_name_re = $matches[1];
-
-		#
-		# Loop through every tag until we find the corresponding closing tag.
-		#
-		do {
-			#
-			# Split the text using the first $tag_match pattern found.
-			# Text before  pattern will be first in the array, text after
-			# pattern will be at the end, and between will be any catches made 
-			# by the pattern.
-			#
-			$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
-			
-			if (count($parts) < 3) {
-				#
-				# End of $text reached with unbalenced tag(s).
-				# In that case, we return original text unchanged and pass the
-				# first character as filtered to prevent an infinite loop in the 
-				# parent function.
-				#
-				return array($original_text{0}, substr($original_text, 1));
-			}
-			
-			$block_text .= $parts[0]; # Text before current tag.
-			$tag         = $parts[1]; # Tag to handle.
-			$text        = $parts[2]; # Remaining text after current tag.
-			
-			#
-			# Check for: Auto-close tag (like <hr/>)
-			#			 Comments and Processing Instructions.
-			#
-			if (preg_match('{^</?(?:'.$this->auto_close_tags_re.')\b}', $tag) ||
-				$tag{1} == '!' || $tag{1} == '?')
-			{
-				# Just add the tag to the block as if it was text.
-				$block_text .= $tag;
-			}
-			else {
-				#
-				# Increase/decrease nested tag count. Only do so if
-				# the tag's name match base tag's.
-				#
-				if (preg_match('{^</?'.$base_tag_name_re.'\b}', $tag)) {
-					if ($tag{1} == '/')						$depth--;
-					else if ($tag{strlen($tag)-2} != '/')	$depth++;
-				}
-				
-				#
-				# Check for `markdown="1"` attribute and handle it.
-				#
-				if ($md_attr && 
-					preg_match($markdown_attr_re, $tag, $attr_m) &&
-					preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
-				{
-					# Remove `markdown` attribute from opening tag.
-					$tag = preg_replace($markdown_attr_re, '', $tag);
-					
-					# Check if text inside this tag must be parsed in span mode.
-					$this->mode = $attr_m[2] . $attr_m[3];
-					$span_mode = $this->mode == 'span' || $this->mode != 'block' &&
-						preg_match('{^<(?:'.$this->contain_span_tags_re.')\b}', $tag);
-					
-					# Calculate indent before tag.
-					if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) {
-						$strlen = $this->utf8_strlen;
-						$indent = $strlen($matches[1], 'UTF-8');
-					} else {
-						$indent = 0;
-					}
-					
-					# End preceding block with this tag.
-					$block_text .= $tag;
-					$parsed .= $this->$hash_method($block_text);
-					
-					# Get enclosing tag name for the ParseMarkdown function.
-					# (This pattern makes $tag_name_re safe without quoting.)
-					preg_match('/^<([\w:$]*)\b/', $tag, $matches);
-					$tag_name_re = $matches[1];
-					
-					# Parse the content using the HTML-in-Markdown parser.
-					list ($block_text, $text)
-						= $this->_hashHTMLBlocks_inMarkdown($text, $indent, 
-							$tag_name_re, $span_mode);
-					
-					# Outdent markdown text.
-					if ($indent > 0) {
-						$block_text = preg_replace("/^[ ]{1,$indent}/m", "", 
-													$block_text);
-					}
-					
-					# Append tag content to parsed text.
-					if (!$span_mode)	$parsed .= "\n\n$block_text\n\n";
-					else				$parsed .= "$block_text";
-					
-					# Start over with a new block.
-					$block_text = "";
-				}
-				else $block_text .= $tag;
-			}
-			
-		} while ($depth > 0);
-		
-		#
-		# Hash last block text that wasn't processed inside the loop.
-		#
-		$parsed .= $this->$hash_method($block_text);
-		
-		return array($parsed, $text);
-	}
-
-
-	protected function hashClean($text) {
-	#
-	# Called whenever a tag must be hashed when a function inserts a "clean" tag
-	# in $text, it passes through this function and is automaticaly escaped, 
-	# blocking invalid nested overlap.
-	#
-		return $this->hashPart($text, 'C');
-	}
-
-
-	protected function doAnchors($text) {
-	#
-	# Turn Markdown link shortcuts into XHTML <a> tags.
-	#
-		if ($this->in_anchor) return $text;
-		$this->in_anchor = true;
-		
-		#
-		# First, handle reference-style links: [link text] [id]
-		#
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		#
-		# Next, inline-style links: [link text](url "optional title")
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  \[
-				('.$this->nested_brackets_re.')	# link text = $2
-			  \]
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(.+?)>	# href = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# href = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# Title = $7
-				  \6		# matching quote
-				  [ \n]*	# ignore any spaces/tabs between closing quote and )
-				)?			# title is optional
-			  \)
-			  (?:[ ]? '.$this->id_class_attr_catch_re.' )?	 # $8 = id/class attributes
-			)
-			}xs',
-			array($this, '_doAnchors_inline_callback'), $text);
-
-		#
-		# Last, handle reference-style shortcuts: [link text]
-		# These must come last in case you've also got [link text][1]
-		# or [link text](/foo)
-		#
-		$text = preg_replace_callback('{
-			(					# wrap whole match in $1
-			  \[
-				([^\[\]]+)		# link text = $2; can\'t contain [ or ]
-			  \]
-			)
-			}xs',
-			array($this, '_doAnchors_reference_callback'), $text);
-
-		$this->in_anchor = false;
-		return $text;
-	}
-	protected function _doAnchors_reference_callback($matches) {
-		$whole_match =  $matches[1];
-		$link_text   =  $matches[2];
-		$link_id     =& $matches[3];
-
-		if ($link_id == "") {
-			# for shortcut links like [this][] or [this].
-			$link_id = $link_text;
-		}
-		
-		# lower-case and turn embedded newlines into spaces
-		$link_id = strtolower($link_id);
-		$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
-
-		if (isset($this->urls[$link_id])) {
-			$url = $this->urls[$link_id];
-			$url = $this->encodeURLAttribute($url);
-			
-			$result = "<a href=\"$url\"";
-			if ( isset( $this->titles[$link_id] ) ) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			if (isset($this->ref_attr[$link_id]))
-				$result .= $this->ref_attr[$link_id];
-		
-			$link_text = $this->runSpanGamut($link_text);
-			$result .= ">$link_text</a>";
-			$result = $this->hashPart($result);
-		}
-		else {
-			$result = $whole_match;
-		}
-		return $result;
-	}
-	protected function _doAnchors_inline_callback($matches) {
-		$whole_match	=  $matches[1];
-		$link_text		=  $this->runSpanGamut($matches[2]);
-		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-		$attr  = $this->doExtraAttributes("a", $dummy =& $matches[8]);
-
-		// if the URL was of the form <s p a c e s> it got caught by the HTML
-		// tag parser and hashed. Need to reverse the process before using the URL.
-		$unhashed = $this->unhash($url);
-		if ($unhashed != $url)
-			$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
-
-		$url = $this->encodeURLAttribute($url);
-
-		$result = "<a href=\"$url\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\"";
-		}
-		$result .= $attr;
-		
-		$link_text = $this->runSpanGamut($link_text);
-		$result .= ">$link_text</a>";
-
-		return $this->hashPart($result);
-	}
-
-
-	protected function doImages($text) {
-	#
-	# Turn Markdown image shortcuts into <img> tags.
-	#
-		#
-		# First, handle reference-style labeled images: ![alt text][id]
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-
-			  [ ]?				# one optional space
-			  (?:\n[ ]*)?		# one optional newline followed by spaces
-
-			  \[
-				(.*?)		# id = $3
-			  \]
-
-			)
-			}xs', 
-			array($this, '_doImages_reference_callback'), $text);
-
-		#
-		# Next, handle inline images:  ![alt text](url "optional title")
-		# Don't forget: encode * and _
-		#
-		$text = preg_replace_callback('{
-			(				# wrap whole match in $1
-			  !\[
-				('.$this->nested_brackets_re.')		# alt text = $2
-			  \]
-			  \s?			# One optional whitespace character
-			  \(			# literal paren
-				[ \n]*
-				(?:
-					<(\S*)>	# src url = $3
-				|
-					('.$this->nested_url_parenthesis_re.')	# src url = $4
-				)
-				[ \n]*
-				(			# $5
-				  ([\'"])	# quote char = $6
-				  (.*?)		# title = $7
-				  \6		# matching quote
-				  [ \n]*
-				)?			# title is optional
-			  \)
-			  (?:[ ]? '.$this->id_class_attr_catch_re.' )?	 # $8 = id/class attributes
-			)
-			}xs',
-			array($this, '_doImages_inline_callback'), $text);
-
-		return $text;
-	}
-	protected function _doImages_reference_callback($matches) {
-		$whole_match = $matches[1];
-		$alt_text    = $matches[2];
-		$link_id     = strtolower($matches[3]);
-
-		if ($link_id == "") {
-			$link_id = strtolower($alt_text); # for shortcut links like ![this][].
-		}
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		if (isset($this->urls[$link_id])) {
-			$url = $this->encodeURLAttribute($this->urls[$link_id]);
-			$result = "<img src=\"$url\" alt=\"$alt_text\"";
-			if (isset($this->titles[$link_id])) {
-				$title = $this->titles[$link_id];
-				$title = $this->encodeAttribute($title);
-				$result .=  " title=\"$title\"";
-			}
-			if (isset($this->ref_attr[$link_id]))
-				$result .= $this->ref_attr[$link_id];
-			$result .= $this->empty_element_suffix;
-			$result = $this->hashPart($result);
-		}
-		else {
-			# If there's no such link ID, leave intact:
-			$result = $whole_match;
-		}
-
-		return $result;
-	}
-	protected function _doImages_inline_callback($matches) {
-		$whole_match	= $matches[1];
-		$alt_text		= $matches[2];
-		$url			= $matches[3] == '' ? $matches[4] : $matches[3];
-		$title			=& $matches[7];
-		$attr  = $this->doExtraAttributes("img", $dummy =& $matches[8]);
-
-		$alt_text = $this->encodeAttribute($alt_text);
-		$url = $this->encodeURLAttribute($url);
-		$result = "<img src=\"$url\" alt=\"$alt_text\"";
-		if (isset($title)) {
-			$title = $this->encodeAttribute($title);
-			$result .=  " title=\"$title\""; # $title already quoted
-		}
-		$result .= $attr;
-		$result .= $this->empty_element_suffix;
-
-		return $this->hashPart($result);
-	}
-
-
-	protected function doHeaders($text) {
-	#
-	# Redefined to add id and class attribute support.
-	#
-		# Setext-style headers:
-		#	  Header 1  {#header1}
-		#	  ========
-		#  
-		#	  Header 2  {#header2 .class1 .class2}
-		#	  --------
-		#
-		$text = preg_replace_callback(
-			'{
-				(^.+?)								# $1: Header text
-				(?:[ ]+ '.$this->id_class_attr_catch_re.' )?	 # $3 = id/class attributes
-				[ ]*\n(=+|-+)[ ]*\n+				# $3: Header footer
-			}mx',
-			array($this, '_doHeaders_callback_setext'), $text);
-
-		# atx-style headers:
-		#	# Header 1        {#header1}
-		#	## Header 2       {#header2}
-		#	## Header 2 with closing hashes ##  {#header3.class1.class2}
-		#	...
-		#	###### Header 6   {.class2}
-		#
-		$text = preg_replace_callback('{
-				^(\#{1,6})	# $1 = string of #\'s
-				[ ]*
-				(.+?)		# $2 = Header text
-				[ ]*
-				\#*			# optional closing #\'s (not counted)
-				(?:[ ]+ '.$this->id_class_attr_catch_re.' )?	 # $3 = id/class attributes
-				[ ]*
-				\n+
-			}xm',
-			array($this, '_doHeaders_callback_atx'), $text);
-
-		return $text;
-	}
-	protected function _doHeaders_callback_setext($matches) {
-		if ($matches[3] == '-' && preg_match('{^- }', $matches[1]))
-			return $matches[0];
-		$level = $matches[3]{0} == '=' ? 1 : 2;
-		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[2]);
-		$block = "<h$level$attr>".$this->runSpanGamut($matches[1])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-	protected function _doHeaders_callback_atx($matches) {
-		$level = strlen($matches[1]);
-		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[3]);
-		$block = "<h$level$attr>".$this->runSpanGamut($matches[2])."</h$level>";
-		return "\n" . $this->hashBlock($block) . "\n\n";
-	}
-
-
-	protected function doTables($text) {
-	#
-	# Form HTML tables.
-	#
-		$less_than_tab = $this->tab_width - 1;
-		#
-		# Find tables with leading pipe.
-		#
-		#	| Header 1 | Header 2
-		#	| -------- | --------
-		#	| Cell 1   | Cell 2
-		#	| Cell 3   | Cell 4
-		#
-		$text = preg_replace_callback('
-			{
-				^							# Start of a line
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				[|]							# Optional leading pipe (present)
-				(.+) \n						# $1: Header row (at least one pipe)
-				
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				[|] ([ ]*[-:]+[-| :]*) \n	# $2: Header underline
-				
-				(							# $3: Cells
-					(?>
-						[ ]*				# Allowed whitespace.
-						[|] .* \n			# Row content.
-					)*
-				)
-				(?=\n|\Z)					# Stop at final double newline.
-			}xm',
-			array($this, '_doTable_leadingPipe_callback'), $text);
-		
-		#
-		# Find tables without leading pipe.
-		#
-		#	Header 1 | Header 2
-		#	-------- | --------
-		#	Cell 1   | Cell 2
-		#	Cell 3   | Cell 4
-		#
-		$text = preg_replace_callback('
-			{
-				^							# Start of a line
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				(\S.*[|].*) \n				# $1: Header row (at least one pipe)
-				
-				[ ]{0,'.$less_than_tab.'}	# Allowed whitespace.
-				([-:]+[ ]*[|][-| :]*) \n	# $2: Header underline
-				
-				(							# $3: Cells
-					(?>
-						.* [|] .* \n		# Row content
-					)*
-				)
-				(?=\n|\Z)					# Stop at final double newline.
-			}xm',
-			array($this, '_DoTable_callback'), $text);
-
-		return $text;
-	}
-	protected function _doTable_leadingPipe_callback($matches) {
-		$head		= $matches[1];
-		$underline	= $matches[2];
-		$content	= $matches[3];
-		
-		# Remove leading pipe for each row.
-		$content	= preg_replace('/^ *[|]/m', '', $content);
-		
-		return $this->_doTable_callback(array($matches[0], $head, $underline, $content));
-	}
-	protected function _doTable_makeAlignAttr($alignname)
-	{
-		if (empty($this->table_align_class_tmpl))
-			return " align=\"$alignname\"";
-
-		$classname = str_replace('%%', $alignname, $this->table_align_class_tmpl);
-		return " class=\"$classname\"";
-	}
-	protected function _doTable_callback($matches) {
-		$head		= $matches[1];
-		$underline	= $matches[2];
-		$content	= $matches[3];
-
-		# Remove any tailing pipes for each line.
-		$head		= preg_replace('/[|] *$/m', '', $head);
-		$underline	= preg_replace('/[|] *$/m', '', $underline);
-		$content	= preg_replace('/[|] *$/m', '', $content);
-		
-		# Reading alignement from header underline.
-		$separators	= preg_split('/ *[|] */', $underline);
-		foreach ($separators as $n => $s) {
-			if (preg_match('/^ *-+: *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('right');
-			else if (preg_match('/^ *:-+: *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('center');
-			else if (preg_match('/^ *:-+ *$/', $s))
-				$attr[$n] = $this->_doTable_makeAlignAttr('left');
-			else
-				$attr[$n] = '';
-		}
-		
-		# Parsing span elements, including code spans, character escapes, 
-		# and inline HTML tags, so that pipes inside those gets ignored.
-		$head		= $this->parseSpan($head);
-		$headers	= preg_split('/ *[|] */', $head);
-		$col_count	= count($headers);
-		$attr       = array_pad($attr, $col_count, '');
-		
-		# Write column headers.
-		$text = "<table>\n";
-		$text .= "<thead>\n";
-		$text .= "<tr>\n";
-		foreach ($headers as $n => $header)
-			$text .= "  <th$attr[$n]>".$this->runSpanGamut(trim($header))."</th>\n";
-		$text .= "</tr>\n";
-		$text .= "</thead>\n";
-		
-		# Split content by row.
-		$rows = explode("\n", trim($content, "\n"));
-		
-		$text .= "<tbody>\n";
-		foreach ($rows as $row) {
-			# Parsing span elements, including code spans, character escapes, 
-			# and inline HTML tags, so that pipes inside those gets ignored.
-			$row = $this->parseSpan($row);
-			
-			# Split row by cell.
-			$row_cells = preg_split('/ *[|] */', $row, $col_count);
-			$row_cells = array_pad($row_cells, $col_count, '');
-			
-			$text .= "<tr>\n";
-			foreach ($row_cells as $n => $cell)
-				$text .= "  <td$attr[$n]>".$this->runSpanGamut(trim($cell))."</td>\n";
-			$text .= "</tr>\n";
-		}
-		$text .= "</tbody>\n";
-		$text .= "</table>";
-		
-		return $this->hashBlock($text) . "\n";
-	}
-
-	
-	protected function doDefLists($text) {
-	#
-	# Form HTML definition lists.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Re-usable pattern to match any entire dl list:
-		$whole_list_re = '(?>
-			(								# $1 = whole list
-			  (								# $2
-				[ ]{0,'.$less_than_tab.'}
-				((?>.*\S.*\n)+)				# $3 = defined term
-				\n?
-				[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
-			  )
-			  (?s:.+?)
-			  (								# $4
-				  \z
-				|
-				  \n{2,}
-				  (?=\S)
-				  (?!						# Negative lookahead for another term
-					[ ]{0,'.$less_than_tab.'}
-					(?: \S.*\n )+?			# defined term
-					\n?
-					[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
-				  )
-				  (?!						# Negative lookahead for another definition
-					[ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition
-				  )
-			  )
-			)
-		)'; // mx
-
-		$text = preg_replace_callback('{
-				(?>\A\n?|(?<=\n\n))
-				'.$whole_list_re.'
-			}mx',
-			array($this, '_doDefLists_callback'), $text);
-
-		return $text;
-	}
-	protected function _doDefLists_callback($matches) {
-		# Re-usable patterns to match list item bullets and number markers:
-		$list = $matches[1];
-		
-		# Turn double returns into triple returns, so that we can make a
-		# paragraph for the last item in a list, if necessary:
-		$result = trim($this->processDefListItems($list));
-		$result = "<dl>\n" . $result . "\n</dl>";
-		return $this->hashBlock($result) . "\n\n";
-	}
-
-
-	protected function processDefListItems($list_str) {
-	#
-	#	Process the contents of a single definition list, splitting it
-	#	into individual term and definition list items.
-	#
-		$less_than_tab = $this->tab_width - 1;
-		
-		# trim trailing blank lines:
-		$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
-
-		# Process definition terms.
-		$list_str = preg_replace_callback('{
-			(?>\A\n?|\n\n+)					# leading line
-			(								# definition terms = $1
-				[ ]{0,'.$less_than_tab.'}	# leading whitespace
-				(?!\:[ ]|[ ])				# negative lookahead for a definition
-											#   mark (colon) or more whitespace.
-				(?> \S.* \n)+?				# actual term (not whitespace).	
-			)			
-			(?=\n?[ ]{0,3}:[ ])				# lookahead for following line feed 
-											#   with a definition mark.
-			}xm',
-			array($this, '_processDefListItems_callback_dt'), $list_str);
-
-		# Process actual definitions.
-		$list_str = preg_replace_callback('{
-			\n(\n+)?						# leading line = $1
-			(								# marker space = $2
-				[ ]{0,'.$less_than_tab.'}	# whitespace before colon
-				\:[ ]+						# definition mark (colon)
-			)
-			((?s:.+?))						# definition text = $3
-			(?= \n+ 						# stop at next definition mark,
-				(?:							# next term or end of text
-					[ ]{0,'.$less_than_tab.'} \:[ ]	|
-					<dt> | \z
-				)						
-			)					
-			}xm',
-			array($this, '_processDefListItems_callback_dd'), $list_str);
-
-		return $list_str;
-	}
-	protected function _processDefListItems_callback_dt($matches) {
-		$terms = explode("\n", trim($matches[1]));
-		$text = '';
-		foreach ($terms as $term) {
-			$term = $this->runSpanGamut(trim($term));
-			$text .= "\n<dt>" . $term . "</dt>";
-		}
-		return $text . "\n";
-	}
-	protected function _processDefListItems_callback_dd($matches) {
-		$leading_line	= $matches[1];
-		$marker_space	= $matches[2];
-		$def			= $matches[3];
-
-		if ($leading_line || preg_match('/\n{2,}/', $def)) {
-			# Replace marker with the appropriate whitespace indentation
-			$def = str_repeat(' ', strlen($marker_space)) . $def;
-			$def = $this->runBlockGamut($this->outdent($def . "\n\n"));
-			$def = "\n". $def ."\n";
-		}
-		else {
-			$def = rtrim($def);
-			$def = $this->runSpanGamut($this->outdent($def));
-		}
-
-		return "\n<dd>" . $def . "</dd>\n";
-	}
-
-
-	protected function doFencedCodeBlocks($text) {
-	#
-	# Adding the fenced code block syntax to regular Markdown:
-	#
-	# ~~~
-	# Code block
-	# ~~~
-	#
-		$less_than_tab = $this->tab_width;
-		
-		$text = preg_replace_callback('{
-				(?:\n|\A)
-				# 1: Opening marker
-				(
-					(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
-				)
-				[ ]*
-				(?:
-					\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
-				|
-					'.$this->id_class_attr_catch_re.' # 3: Extra attributes
-				)?
-				[ ]* \n # Whitespace and newline following marker.
-				
-				# 4: Content
-				(
-					(?>
-						(?!\1 [ ]* \n)	# Not a closing marker.
-						.*\n+
-					)+
-				)
-				
-				# Closing marker.
-				\1 [ ]* (?= \n )
-			}xm',
-			array($this, '_doFencedCodeBlocks_callback'), $text);
-
-		return $text;
-	}
-	protected function _doFencedCodeBlocks_callback($matches) {
-		$classname =& $matches[2];
-		$attrs     =& $matches[3];
-		$codeblock = $matches[4];
-		$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
-		$codeblock = preg_replace_callback('/^\n+/',
-			array($this, '_doFencedCodeBlocks_newlines'), $codeblock);
-
-		if ($classname != "") {
-			if ($classname{0} == '.')
-				$classname = substr($classname, 1);
-			$attr_str = ' class="'.$this->code_class_prefix.$classname.'"';
-		} else {
-			$attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs);
-		}
-		$pre_attr_str  = $this->code_attr_on_pre ? $attr_str : '';
-		$code_attr_str = $this->code_attr_on_pre ? '' : $attr_str;
-		$codeblock  = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>";
-		
-		return "\n\n".$this->hashBlock($codeblock)."\n\n";
-	}
-	protected function _doFencedCodeBlocks_newlines($matches) {
-		return str_repeat("<br$this->empty_element_suffix", 
-			strlen($matches[0]));
-	}
-
-
-	#
-	# Redefining emphasis markers so that emphasis by underscore does not
-	# work in the middle of a word.
-	#
-	protected $em_relist = array(
-		''  => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
-		'*' => '(?<![\s*])\*(?!\*)',
-		'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
-		);
-	protected $strong_relist = array(
-		''   => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
-		'**' => '(?<![\s*])\*\*(?!\*)',
-		'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
-		);
-	protected $em_strong_relist = array(
-		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
-		'***' => '(?<![\s*])\*\*\*(?!\*)',
-		'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
-		);
-
-
-	protected function formParagraphs($text) {
-	#
-	#	Params:
-	#		$text - string to process with html <p> tags
-	#
-		# Strip leading and trailing lines:
-		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
-		
-		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
-
-		#
-		# Wrap <p> tags and unhashify HTML blocks
-		#
-		foreach ($grafs as $key => $value) {
-			$value = trim($this->runSpanGamut($value));
-			
-			# Check if this should be enclosed in a paragraph.
-			# Clean tag hashes & block tag hashes are left alone.
-			$is_p = !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
-			
-			if ($is_p) {
-				$value = "<p>$value</p>";
-			}
-			$grafs[$key] = $value;
-		}
-		
-		# Join grafs in one text, then unhash HTML tags. 
-		$text = implode("\n\n", $grafs);
-		
-		# Finish by removing any tag hashes still present in $text.
-		$text = $this->unhash($text);
-		
-		return $text;
-	}
-	
-	
-	### Footnotes
-	
-	protected function stripFootnotes($text) {
-	#
-	# Strips link definitions from text, stores the URLs and titles in
-	# hash references.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Link defs are in the form: [^id]: url "optional title"
-		$text = preg_replace_callback('{
-			^[ ]{0,'.$less_than_tab.'}\[\^(.+?)\][ ]?:	# note_id = $1
-			  [ ]*
-			  \n?					# maybe *one* newline
-			(						# text = $2 (no blank lines allowed)
-				(?:					
-					.+				# actual text
-				|
-					\n				# newlines but 
-					(?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker.
-					(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed 
-									# by non-indented content
-				)*
-			)		
-			}xm',
-			array($this, '_stripFootnotes_callback'),
-			$text);
-		return $text;
-	}
-	protected function _stripFootnotes_callback($matches) {
-		$note_id = $this->fn_id_prefix . $matches[1];
-		$this->footnotes[$note_id] = $this->outdent($matches[2]);
-		return ''; # String that will replace the block
-	}
-
-
-	protected function doFootnotes($text) {
-	#
-	# Replace footnote references in $text [^id] with a special text-token 
-	# which will be replaced by the actual footnote marker in appendFootnotes.
-	#
-		if (!$this->in_anchor) {
-			$text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text);
-		}
-		return $text;
-	}
-
-	
-	protected function appendFootnotes($text) {
-	#
-	# Append footnote list to text.
-	#
-		$text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
-			array($this, '_appendFootnotes_callback'), $text);
-	
-		if (!empty($this->footnotes_ordered)) {
-			$text .= "\n\n";
-			$text .= "<div class=\"footnotes\">\n";
-			$text .= "<hr". $this->empty_element_suffix ."\n";
-			$text .= "<ol>\n\n";
-
-			$attr = "";
-			if ($this->fn_backlink_class != "") {
-				$class = $this->fn_backlink_class;
-				$class = $this->encodeAttribute($class);
-				$attr .= " class=\"$class\"";
-			}
-			if ($this->fn_backlink_title != "") {
-				$title = $this->fn_backlink_title;
-				$title = $this->encodeAttribute($title);
-				$attr .= " title=\"$title\"";
-			}
-			$num = 0;
-			
-			while (!empty($this->footnotes_ordered)) {
-				$footnote = reset($this->footnotes_ordered);
-				$note_id = key($this->footnotes_ordered);
-				unset($this->footnotes_ordered[$note_id]);
-				$ref_count = $this->footnotes_ref_count[$note_id];
-				unset($this->footnotes_ref_count[$note_id]);
-				unset($this->footnotes[$note_id]);
-				
-				$footnote .= "\n"; # Need to append newline before parsing.
-				$footnote = $this->runBlockGamut("$footnote\n");				
-				$footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
-					array($this, '_appendFootnotes_callback'), $footnote);
-				
-				$attr = str_replace("%%", ++$num, $attr);
-				$note_id = $this->encodeAttribute($note_id);
-
-				# Prepare backlink, multiple backlinks if multiple references
-				$backlink = "<a href=\"#fnref:$note_id\"$attr>&#8617;</a>";
-				for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) {
-					$backlink .= " <a href=\"#fnref$ref_num:$note_id\"$attr>&#8617;</a>";
-				}
-				# Add backlink to last paragraph; create new paragraph if needed.
-				if (preg_match('{</p>$}', $footnote)) {
-					$footnote = substr($footnote, 0, -4) . "&#160;$backlink</p>";
-				} else {
-					$footnote .= "\n\n<p>$backlink</p>";
-				}
-				
-				$text .= "<li id=\"fn:$note_id\">\n";
-				$text .= $footnote . "\n";
-				$text .= "</li>\n\n";
-			}
-			
-			$text .= "</ol>\n";
-			$text .= "</div>";
-		}
-		return $text;
-	}
-	protected function _appendFootnotes_callback($matches) {
-		$node_id = $this->fn_id_prefix . $matches[1];
-		
-		# Create footnote marker only if it has a corresponding footnote *and*
-		# the footnote hasn't been used by another marker.
-		if (isset($this->footnotes[$node_id])) {
-			$num =& $this->footnotes_numbers[$node_id];
-			if (!isset($num)) {
-				# Transfer footnote content to the ordered list and give it its
-				# number
-				$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
-				$this->footnotes_ref_count[$node_id] = 1;
-				$num = $this->footnote_counter++;
-				$ref_count_mark = '';
-			} else {
-				$ref_count_mark = $this->footnotes_ref_count[$node_id] += 1;
-			}
-
-			$attr = "";
-			if ($this->fn_link_class != "") {
-				$class = $this->fn_link_class;
-				$class = $this->encodeAttribute($class);
-				$attr .= " class=\"$class\"";
-			}
-			if ($this->fn_link_title != "") {
-				$title = $this->fn_link_title;
-				$title = $this->encodeAttribute($title);
-				$attr .= " title=\"$title\"";
-			}
-			
-			$attr = str_replace("%%", $num, $attr);
-			$node_id = $this->encodeAttribute($node_id);
-			
-			return
-				"<sup id=\"fnref$ref_count_mark:$node_id\">".
-				"<a href=\"#fn:$node_id\"$attr>$num</a>".
-				"</sup>";
-		}
-		
-		return "[^".$matches[1]."]";
-	}
-		
-	
-	### Abbreviations ###
-	
-	protected function stripAbbreviations($text) {
-	#
-	# Strips abbreviations from text, stores titles in hash references.
-	#
-		$less_than_tab = $this->tab_width - 1;
-
-		# Link defs are in the form: [id]*: url "optional title"
-		$text = preg_replace_callback('{
-			^[ ]{0,'.$less_than_tab.'}\*\[(.+?)\][ ]?:	# abbr_id = $1
-			(.*)					# text = $2 (no blank lines allowed)	
-			}xm',
-			array($this, '_stripAbbreviations_callback'),
-			$text);
-		return $text;
-	}
-	protected function _stripAbbreviations_callback($matches) {
-		$abbr_word = $matches[1];
-		$abbr_desc = $matches[2];
-		if ($this->abbr_word_re)
-			$this->abbr_word_re .= '|';
-		$this->abbr_word_re .= preg_quote($abbr_word);
-		$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
-		return ''; # String that will replace the block
-	}
-	
-	
-	protected function doAbbreviations($text) {
-	#
-	# Find defined abbreviations in text and wrap them in <abbr> elements.
-	#
-		if ($this->abbr_word_re) {
-			// cannot use the /x modifier because abbr_word_re may 
-			// contain significant spaces:
-			$text = preg_replace_callback('{'.
-				'(?<![\w\x1A])'.
-				'(?:'.$this->abbr_word_re.')'.
-				'(?![\w\x1A])'.
-				'}', 
-				array($this, '_doAbbreviations_callback'), $text);
-		}
-		return $text;
-	}
-	protected function _doAbbreviations_callback($matches) {
-		$abbr = $matches[0];
-		if (isset($this->abbr_desciptions[$abbr])) {
-			$desc = $this->abbr_desciptions[$abbr];
-			if (empty($desc)) {
-				return $this->hashPart("<abbr>$abbr</abbr>");
-			} else {
-				$desc = $this->encodeAttribute($desc);
-				return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
-			}
-		} else {
-			return $matches[0];
-		}
-	}
-
 }

library/php-markdown/Michelf/MarkdownExtra.inc.php

@@ -1,10 +1,10 @@
 <?php
 
-# Use this file if you cannot use class autoloading. It will include all the
+// Use this file if you cannot use class autoloading. It will include all the
-# files needed for the MarkdownExtra parser.
+// files needed for the MarkdownExtra parser.
-#
+//
-# Take a look at the PSR-0-compatible class autoloading implementation
+// Take a look at the PSR-0-compatible class autoloading implementation
-# in the Readme.php file if you want a simple autoloader setup.
+// in the Readme.php file if you want a simple autoloader setup.
 
 require_once dirname(__FILE__) . '/MarkdownInterface.php';
 require_once dirname(__FILE__) . '/Markdown.php';

library/php-markdown/Michelf/MarkdownExtra.php

@@ -1,38 +1,1785 @@
 <?php
-#
+/**
-# Markdown Extra  -  A text-to-HTML conversion tool for web writers
+ * Markdown Extra - A text-to-HTML conversion tool for web writers
-#
+ *
-# PHP Markdown Extra
+ * @package   php-markdown
-# Copyright (c) 2004-2014 Michel Fortin  
+ * @author    Michel Fortin <michel.fortin@michelf.com>
-# <http://michelf.com/projects/php-markdown/>
+ * @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
-#
+ * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
-# Original Markdown
+ */
-# Copyright (c) 2004-2006 John Gruber  
+
-# <http://daringfireball.net/projects/markdown/>
-#
 namespace Michelf;
 
+/**
+ * Markdown Extra Parser Class
+ */
+class MarkdownExtra extends \Michelf\Markdown {
+	/**
+	 * Configuration variables
+	 */
 
-# Just force Michelf/Markdown.php to load. This is needed to load
+	/**
-# the temporary implementation class. See below for details.
+	 * Prefix for footnote ids.
-\Michelf\Markdown::MARKDOWNLIB_VERSION;
+	 * @var string
+	 */
+	public $fn_id_prefix = "";
+	
+	/**
+	 * Optional title attribute for footnote links and backlinks.
+	 * @var string
+	 */
+	public $fn_link_title     = "";
+	public $fn_backlink_title = "";
+	
+	/**
+	 * Optional class attribute for footnote links and backlinks.
+	 * @var string
+	 */
+	public $fn_link_class     = "footnote-ref";
+	public $fn_backlink_class = "footnote-backref";
 
-#
+	/**
-# Markdown Extra Parser Class
+	 * Content to be displayed within footnote backlinks. The default is '↩';
-#
+	 * the U+FE0E on the end is a Unicode variant selector used to prevent iOS
-# Note: Currently the implementation resides in the temporary class
+	 * from displaying the arrow character as an emoji.
-# \Michelf\MarkdownExtra_TmpImpl (in the same file as \Michelf\Markdown).
+	 * @var string
-# This makes it easier to propagate the changes between the three different
+	 */
-# packaging styles of PHP Markdown. Once this issue is resolved, the
+	public $fn_backlink_html = '&#8617;&#xFE0E;';
-# _MarkdownExtra_TmpImpl will disappear and this one will contain the code.
-#
 
-class MarkdownExtra extends \Michelf\_MarkdownExtra_TmpImpl {
+	/**
+	 * Class name for table cell alignment (%% replaced left/center/right)
+	 * For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
+	 * If empty, the align attribute is used instead of a class name.
+	 * @var string
+	 */
+	public $table_align_class_tmpl = '';
 
-	### Parser Implementation ###
+	/**
+	 * Optional class prefix for fenced code block.
+	 * @var string
+	 */
+	public $code_class_prefix = "";
 
-	# Temporarily, the implemenation is in the _MarkdownExtra_TmpImpl class.
+	/**
-	# See note above.
+	 * Class attribute for code blocks goes on the `code` tag;
+	 * setting this to true will put attributes on the `pre` tag instead.
+	 * @var boolean
+	 */
+	public $code_attr_on_pre = false;
 
+	/**
+	 * Predefined abbreviations.
+	 * @var array
+	 */
+	public $predef_abbr = array();
+
+	/**
+	 * Parser implementation
+	 */
+	
+	/**
+	 * Constructor function. Initialize the parser object.
+	 * @return void
+	 */
+	public function __construct() {
+		// Add extra escapable characters before parent constructor 
+		// initialize the table.
+		$this->escape_chars .= ':|';
+		
+		// Insert extra document, block, and span transformations. 
+		// Parent constructor will do the sorting.
+		$this->document_gamut += array(
+			"doFencedCodeBlocks" => 5,
+			"stripFootnotes"     => 15,
+			"stripAbbreviations" => 25,
+			"appendFootnotes"    => 50,
+		);
+		$this->block_gamut += array(
+			"doFencedCodeBlocks" => 5,
+			"doTables"           => 15,
+			"doDefLists"         => 45,
+		);
+		$this->span_gamut += array(
+			"doFootnotes"        => 5,
+			"doAbbreviations"    => 70,
+		);
+		
+		$this->enhanced_ordered_list = true;
+		parent::__construct();
+	}
+	
+	
+	/**
+	 * Extra variables used during extra transformations.
+	 * @var array
+	 */
+	protected $footnotes = array();
+	protected $footnotes_ordered = array();
+	protected $footnotes_ref_count = array();
+	protected $footnotes_numbers = array();
+	protected $abbr_desciptions = array();
+	/** @var string */
+	protected $abbr_word_re = '';
+	
+	/**
+	 * Give the current footnote number.
+	 * @var integer
+	 */
+	protected $footnote_counter = 1;
+	
+	/**
+	 * Setting up Extra-specific variables.
+	 */
+	protected function setup() {
+		parent::setup();
+		
+		$this->footnotes = array();
+		$this->footnotes_ordered = array();
+		$this->footnotes_ref_count = array();
+		$this->footnotes_numbers = array();
+		$this->abbr_desciptions = array();
+		$this->abbr_word_re = '';
+		$this->footnote_counter = 1;
+		
+		foreach ($this->predef_abbr as $abbr_word => $abbr_desc) {
+			if ($this->abbr_word_re)
+				$this->abbr_word_re .= '|';
+			$this->abbr_word_re .= preg_quote($abbr_word);
+			$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
+		}
+	}
+
+	/**
+	 * Clearing Extra-specific variables.
+	 */
+	protected function teardown() {
+		$this->footnotes = array();
+		$this->footnotes_ordered = array();
+		$this->footnotes_ref_count = array();
+		$this->footnotes_numbers = array();
+		$this->abbr_desciptions = array();
+		$this->abbr_word_re = '';
+		
+		parent::teardown();
+	}
+	
+	
+	/**
+	 * Extra attribute parser
+	 */
+
+	/**
+	 * Expression to use to catch attributes (includes the braces)
+	 * @var string
+	 */
+	protected $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
+
+	/**
+	 * Expression to use when parsing in a context when no capture is desired
+	 * @var string
+	 */
+	protected $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
+
+	/**
+	 * Parse attributes caught by the $this->id_class_attr_catch_re expression
+	 * and return the HTML-formatted list of attributes.
+	 *
+	 * Currently supported attributes are .class and #id.
+	 *
+	 * In addition, this method also supports supplying a default Id value,
+	 * which will be used to populate the id attribute in case it was not
+	 * overridden.
+	 * @param  string $tag_name
+	 * @param  string $attr
+	 * @param  mixed  $defaultIdValue
+	 * @param  array  $classes
+	 * @return string
+	 */
+	protected function doExtraAttributes($tag_name, $attr, $defaultIdValue = null, $classes = array()) {
+		if (empty($attr) && !$defaultIdValue && empty($classes)) return "";
+		
+		// Split on components
+		preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches);
+		$elements = $matches[0];
+
+		// Handle classes and IDs (only first ID taken into account)
+		$attributes = array();
+		$id = false;
+		foreach ($elements as $element) {
+			if ($element{0} == '.') {
+				$classes[] = substr($element, 1);
+			} else if ($element{0} == '#') {
+				if ($id === false) $id = substr($element, 1);
+			} else if (strpos($element, '=') > 0) {
+				$parts = explode('=', $element, 2);
+				$attributes[] = $parts[0] . '="' . $parts[1] . '"';
+			}
+		}
+
+		if (!$id) $id = $defaultIdValue;
+
+		// Compose attributes as string
+		$attr_str = "";
+		if (!empty($id)) {
+			$attr_str .= ' id="'.$this->encodeAttribute($id) .'"';
+		}
+		if (!empty($classes)) {
+			$attr_str .= ' class="'. implode(" ", $classes) . '"';
+		}
+		if (!$this->no_markup && !empty($attributes)) {
+			$attr_str .= ' '.implode(" ", $attributes);
+		}
+		return $attr_str;
+	}
+
+	/**
+	 * Strips link definitions from text, stores the URLs and titles in
+	 * hash references.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function stripLinkDefinitions($text) {
+		$less_than_tab = $this->tab_width - 1;
+
+		// Link defs are in the form: ^[id]: url "optional title"
+		$text = preg_replace_callback('{
+							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1
+							  [ ]*
+							  \n?				# maybe *one* newline
+							  [ ]*
+							(?:
+							  <(.+?)>			# url = $2
+							|
+							  (\S+?)			# url = $3
+							)
+							  [ ]*
+							  \n?				# maybe one newline
+							  [ ]*
+							(?:
+								(?<=\s)			# lookbehind for whitespace
+								["(]
+								(.*?)			# title = $4
+								[")]
+								[ ]*
+							)?	# title is optional
+					(?:[ ]* '.$this->id_class_attr_catch_re.' )?  # $5 = extra id & class attr
+							(?:\n+|\Z)
+			}xm',
+			array($this, '_stripLinkDefinitions_callback'),
+			$text);
+		return $text;
+	}
+
+	/**
+	 * Strip link definition callback
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _stripLinkDefinitions_callback($matches) {
+		$link_id = strtolower($matches[1]);
+		$url = $matches[2] == '' ? $matches[3] : $matches[2];
+		$this->urls[$link_id] = $url;
+		$this->titles[$link_id] =& $matches[4];
+		$this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]);
+		return ''; // String that will replace the block
+	}
+
+
+	/**
+	 * HTML block parser
+	 */
+	
+	/**
+	 * Tags that are always treated as block tags
+	 * @var string
+	 */
+	protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure';
+						   
+	/**
+	 * Tags treated as block tags only if the opening tag is alone on its line
+	 * @var string
+	 */
+	protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
+	
+	/**
+	 * Tags where markdown="1" default to span mode:
+	 * @var string
+	 */
+	protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
+	
+	/**
+	 * Tags which must not have their contents modified, no matter where
+	 * they appear
+	 * @var string
+	 */
+	protected $clean_tags_re = 'script|style|math|svg';
+	
+	/**
+	 * Tags that do not need to be closed.
+	 * @var string
+	 */
+	protected $auto_close_tags_re = 'hr|img|param|source|track';
+	
+	/**
+	 * Hashify HTML Blocks and "clean tags".
+	 *
+	 * We only want to do this for block-level HTML tags, such as headers,
+	 * lists, and tables. That's because we still want to wrap <p>s around
+	 * "paragraphs" that are wrapped in non-block-level tags, such as anchors,
+	 * phrase emphasis, and spans. The list of tags we're looking for is
+	 * hard-coded.
+	 *
+	 * This works by calling _HashHTMLBlocks_InMarkdown, which then calls
+	 * _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1" 
+	 * attribute is found within a tag, _HashHTMLBlocks_InHTML calls back
+	 *  _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
+	 * These two functions are calling each other. It's recursive!
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function hashHTMLBlocks($text) {
+		if ($this->no_markup) {
+			return $text;
+		}
+
+		// Call the HTML-in-Markdown hasher.
+		list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
+		
+		return $text;
+	}
+
+	/**
+	 * Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags.
+	 *
+	 * *   $indent is the number of space to be ignored when checking for code 
+	 *     blocks. This is important because if we don't take the indent into 
+	 *     account, something like this (which looks right) won't work as expected:
+	 *
+	 *     <div>
+	 *         <div markdown="1">
+	 *         Hello World.  <-- Is this a Markdown code block or text?
+	 *         </div>  <-- Is this a Markdown code block or a real tag?
+	 *     <div>
+	 *
+	 *     If you don't like this, just don't indent the tag on which
+	 *     you apply the markdown="1" attribute.
+	 *
+	 * *   If $enclosing_tag_re is not empty, stops at the first unmatched closing 
+	 *     tag with that name. Nested tags supported.
+	 *
+	 * *   If $span is true, text inside must treated as span. So any double 
+	 *     newline will be replaced by a single newline so that it does not create 
+	 *     paragraphs.
+	 *
+	 * Returns an array of that form: ( processed text , remaining text )
+	 *
+	 * @param  string  $text
+	 * @param  integer $indent
+	 * @param  string  $enclosing_tag_re
+	 * @param  boolean $span
+	 * @return array
+	 */
+	protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0,
+										$enclosing_tag_re = '', $span = false)
+	{
+	
+		if ($text === '') return array('', '');
+
+		// Regex to check for the presense of newlines around a block tag.
+		$newline_before_re = '/(?:^\n?|\n\n)*$/';
+		$newline_after_re = 
+			'{
+				^						# Start of text following the tag.
+				(?>[ ]*<!--.*?-->)?		# Optional comment.
+				[ ]*\n					# Must be followed by newline.
+			}xs';
+		
+		// Regex to match any tag.
+		$block_tag_re =
+			'{
+				(					# $2: Capture whole tag.
+					</?					# Any opening or closing tag.
+						(?>				# Tag name.
+							' . $this->block_tags_re . '			|
+							' . $this->context_block_tags_re . '	|
+							' . $this->clean_tags_re . '        	|
+							(?!\s)'.$enclosing_tag_re . '
+						)
+						(?:
+							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
+							(?>
+								".*?"		|	# Double quotes (can contain `>`)
+								\'.*?\'   	|	# Single quotes (can contain `>`)
+								.+?				# Anything but quotes and `>`.
+							)*?
+						)?
+					>					# End of tag.
+				|
+					<!--    .*?     -->	# HTML Comment
+				|
+					<\?.*?\?> | <%.*?%>	# Processing instruction
+				|
+					<!\[CDATA\[.*?\]\]>	# CData Block
+				' . ( !$span ? ' # If not in span.
+				|
+					# Indented code block
+					(?: ^[ ]*\n | ^ | \n[ ]*\n )
+					[ ]{' . ($indent + 4) . '}[^\n]* \n
+					(?>
+						(?: [ ]{' . ($indent + 4) . '}[^\n]* | [ ]* ) \n
+					)*
+				|
+					# Fenced code block marker
+					(?<= ^ | \n )
+					[ ]{0,' . ($indent + 3) . '}(?:~{3,}|`{3,})
+					[ ]*
+					(?: \.?[-_:a-zA-Z0-9]+ )? # standalone class name
+					[ ]*
+					(?: ' . $this->id_class_attr_nocatch_re . ' )? # extra attributes
+					[ ]*
+					(?= \n )
+				' : '' ) . ' # End (if not is span).
+				|
+					# Code span marker
+					# Note, this regex needs to go after backtick fenced
+					# code blocks but it should also be kept outside of the
+					# "if not in span" condition adding backticks to the parser
+					`+
+				)
+			}xs';
+
+		
+		$depth = 0;		// Current depth inside the tag tree.
+		$parsed = "";	// Parsed text that will be returned.
+
+		// Loop through every tag until we find the closing tag of the parent
+		// or loop until reaching the end of text if no parent tag specified.
+		do {
+			// Split the text using the first $tag_match pattern found.
+			// Text before  pattern will be first in the array, text after
+			// pattern will be at the end, and between will be any catches made 
+			// by the pattern.
+			$parts = preg_split($block_tag_re, $text, 2, 
+								PREG_SPLIT_DELIM_CAPTURE);
+			
+			// If in Markdown span mode, add a empty-string span-level hash 
+			// after each newline to prevent triggering any block element.
+			if ($span) {
+				$void = $this->hashPart("", ':');
+				$newline = "\n$void";
+				$parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void;
+			}
+			
+			$parsed .= $parts[0]; // Text before current tag.
+			
+			// If end of $text has been reached. Stop loop.
+			if (count($parts) < 3) {
+				$text = "";
+				break;
+			}
+			
+			$tag  = $parts[1]; // Tag to handle.
+			$text = $parts[2]; // Remaining text after current tag.
+			$tag_re = preg_quote($tag); // For use in a regular expression.
+			
+			// Check for: Fenced code block marker.
+			// Note: need to recheck the whole tag to disambiguate backtick
+			// fences from code spans
+			if (preg_match('{^\n?([ ]{0,' . ($indent + 3) . '})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+)?[ ]*(?:' . $this->id_class_attr_nocatch_re . ')?[ ]*\n?$}', $tag, $capture)) {
+				// Fenced code block marker: find matching end marker.
+				$fence_indent = strlen($capture[1]); // use captured indent in re
+				$fence_re = $capture[2]; // use captured fence in re
+				if (preg_match('{^(?>.*\n)*?[ ]{' . ($fence_indent) . '}' . $fence_re . '[ ]*(?:\n|$)}', $text,
+					$matches)) 
+				{
+					// End marker found: pass text unchanged until marker.
+					$parsed .= $tag . $matches[0];
+					$text = substr($text, strlen($matches[0]));
+				}
+				else {
+					// No end marker: just skip it.
+					$parsed .= $tag;
+				}
+			}
+			// Check for: Indented code block.
+			else if ($tag{0} == "\n" || $tag{0} == " ") {
+				// Indented code block: pass it unchanged, will be handled 
+				// later.
+				$parsed .= $tag;
+			}
+			// Check for: Code span marker
+			// Note: need to check this after backtick fenced code blocks
+			else if ($tag{0} == "`") {
+				// Find corresponding end marker.
+				$tag_re = preg_quote($tag);
+				if (preg_match('{^(?>.+?|\n(?!\n))*?(?<!`)' . $tag_re . '(?!`)}',
+					$text, $matches))
+				{
+					// End marker found: pass text unchanged until marker.
+					$parsed .= $tag . $matches[0];
+					$text = substr($text, strlen($matches[0]));
+				}
+				else {
+					// Unmatched marker: just skip it.
+					$parsed .= $tag;
+				}
+			}
+			// Check for: Opening Block level tag or
+			//            Opening Context Block tag (like ins and del) 
+			//               used as a block tag (tag is alone on it's line).
+			else if (preg_match('{^<(?:' . $this->block_tags_re . ')\b}', $tag) ||
+				(	preg_match('{^<(?:' . $this->context_block_tags_re . ')\b}', $tag) &&
+					preg_match($newline_before_re, $parsed) &&
+					preg_match($newline_after_re, $text)	)
+				)
+			{
+				// Need to parse tag and following text using the HTML parser.
+				list($block_text, $text) = 
+					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true);
+				
+				// Make sure it stays outside of any paragraph by adding newlines.
+				$parsed .= "\n\n$block_text\n\n";
+			}
+			// Check for: Clean tag (like script, math)
+			//            HTML Comments, processing instructions.
+			else if (preg_match('{^<(?:' . $this->clean_tags_re . ')\b}', $tag) ||
+				$tag{1} == '!' || $tag{1} == '?')
+			{
+				// Need to parse tag and following text using the HTML parser.
+				// (don't check for markdown attribute)
+				list($block_text, $text) = 
+					$this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false);
+				
+				$parsed .= $block_text;
+			}
+			// Check for: Tag with same name as enclosing tag.
+			else if ($enclosing_tag_re !== '' &&
+				// Same name as enclosing tag.
+				preg_match('{^</?(?:' . $enclosing_tag_re . ')\b}', $tag))
+			{
+				// Increase/decrease nested tag count.
+				if ($tag{1} == '/')						$depth--;
+				else if ($tag{strlen($tag)-2} != '/')	$depth++;
+
+				if ($depth < 0) {
+					// Going out of parent element. Clean up and break so we
+					// return to the calling function.
+					$text = $tag . $text;
+					break;
+				}
+				
+				$parsed .= $tag;
+			}
+			else {
+				$parsed .= $tag;
+			}
+		} while ($depth >= 0);
+		
+		return array($parsed, $text);
+	}
+
+	/**
+	 * Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags.
+	 *
+	 * *   Calls $hash_method to convert any blocks.
+	 * *   Stops when the first opening tag closes.
+	 * *   $md_attr indicate if the use of the `markdown="1"` attribute is allowed.
+	 *     (it is not inside clean tags)
+	 *
+	 * Returns an array of that form: ( processed text , remaining text )
+	 * @param  string $text
+	 * @param  string $hash_method
+	 * @param  string $md_attr
+	 * @return array
+	 */
+	protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) {
+		if ($text === '') return array('', '');
+		
+		// Regex to match `markdown` attribute inside of a tag.
+		$markdown_attr_re = '
+			{
+				\s*			# Eat whitespace before the `markdown` attribute
+				markdown
+				\s*=\s*
+				(?>
+					(["\'])		# $1: quote delimiter		
+					(.*?)		# $2: attribute value
+					\1			# matching delimiter	
+				|
+					([^\s>]*)	# $3: unquoted attribute value
+				)
+				()				# $4: make $3 always defined (avoid warnings)
+			}xs';
+		
+		// Regex to match any tag.
+		$tag_re = '{
+				(					# $2: Capture whole tag.
+					</?					# Any opening or closing tag.
+						[\w:$]+			# Tag name.
+						(?:
+							(?=[\s"\'/a-zA-Z0-9])	# Allowed characters after tag name.
+							(?>
+								".*?"		|	# Double quotes (can contain `>`)
+								\'.*?\'   	|	# Single quotes (can contain `>`)
+								.+?				# Anything but quotes and `>`.
+							)*?
+						)?
+					>					# End of tag.
+				|
+					<!--    .*?     -->	# HTML Comment
+				|
+					<\?.*?\?> | <%.*?%>	# Processing instruction
+				|
+					<!\[CDATA\[.*?\]\]>	# CData Block
+				)
+			}xs';
+		
+		$original_text = $text;		// Save original text in case of faliure.
+		
+		$depth		= 0;	// Current depth inside the tag tree.
+		$block_text	= "";	// Temporary text holder for current text.
+		$parsed		= "";	// Parsed text that will be returned.
+
+		// Get the name of the starting tag.
+		// (This pattern makes $base_tag_name_re safe without quoting.)
+		if (preg_match('/^<([\w:$]*)\b/', $text, $matches))
+			$base_tag_name_re = $matches[1];
+
+		// Loop through every tag until we find the corresponding closing tag.
+		do {
+			// Split the text using the first $tag_match pattern found.
+			// Text before  pattern will be first in the array, text after
+			// pattern will be at the end, and between will be any catches made 
+			// by the pattern.
+			$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
+			
+			if (count($parts) < 3) {
+				// End of $text reached with unbalenced tag(s).
+				// In that case, we return original text unchanged and pass the
+				// first character as filtered to prevent an infinite loop in the 
+				// parent function.
+				return array($original_text{0}, substr($original_text, 1));
+			}
+			
+			$block_text .= $parts[0]; // Text before current tag.
+			$tag         = $parts[1]; // Tag to handle.
+			$text        = $parts[2]; // Remaining text after current tag.
+			
+			// Check for: Auto-close tag (like <hr/>)
+			//			 Comments and Processing Instructions.
+			if (preg_match('{^</?(?:' . $this->auto_close_tags_re . ')\b}', $tag) ||
+				$tag{1} == '!' || $tag{1} == '?')
+			{
+				// Just add the tag to the block as if it was text.
+				$block_text .= $tag;
+			}
+			else {
+				// Increase/decrease nested tag count. Only do so if
+				// the tag's name match base tag's.
+				if (preg_match('{^</?' . $base_tag_name_re . '\b}', $tag)) {
+					if ($tag{1} == '/')						$depth--;
+					else if ($tag{strlen($tag)-2} != '/')	$depth++;
+				}
+				
+				// Check for `markdown="1"` attribute and handle it.
+				if ($md_attr && 
+					preg_match($markdown_attr_re, $tag, $attr_m) &&
+					preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
+				{
+					// Remove `markdown` attribute from opening tag.
+					$tag = preg_replace($markdown_attr_re, '', $tag);
+					
+					// Check if text inside this tag must be parsed in span mode.
+					$this->mode = $attr_m[2] . $attr_m[3];
+					$span_mode = $this->mode == 'span' || $this->mode != 'block' &&
+						preg_match('{^<(?:' . $this->contain_span_tags_re . ')\b}', $tag);
+					
+					// Calculate indent before tag.
+					if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) {
+						$strlen = $this->utf8_strlen;
+						$indent = $strlen($matches[1], 'UTF-8');
+					} else {
+						$indent = 0;
+					}
+					
+					// End preceding block with this tag.
+					$block_text .= $tag;
+					$parsed .= $this->$hash_method($block_text);
+					
+					// Get enclosing tag name for the ParseMarkdown function.
+					// (This pattern makes $tag_name_re safe without quoting.)
+					preg_match('/^<([\w:$]*)\b/', $tag, $matches);
+					$tag_name_re = $matches[1];
+					
+					// Parse the content using the HTML-in-Markdown parser.
+					list ($block_text, $text)
+						= $this->_hashHTMLBlocks_inMarkdown($text, $indent, 
+							$tag_name_re, $span_mode);
+					
+					// Outdent markdown text.
+					if ($indent > 0) {
+						$block_text = preg_replace("/^[ ]{1,$indent}/m", "", 
+													$block_text);
+					}
+					
+					// Append tag content to parsed text.
+					if (!$span_mode)	$parsed .= "\n\n$block_text\n\n";
+					else				$parsed .= "$block_text";
+					
+					// Start over with a new block.
+					$block_text = "";
+				}
+				else $block_text .= $tag;
+			}
+			
+		} while ($depth > 0);
+		
+		// Hash last block text that wasn't processed inside the loop.
+		$parsed .= $this->$hash_method($block_text);
+		
+		return array($parsed, $text);
+	}
+
+	/**
+	 * Called whenever a tag must be hashed when a function inserts a "clean" tag
+	 * in $text, it passes through this function and is automaticaly escaped, 
+	 * blocking invalid nested overlap.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function hashClean($text) {
+		return $this->hashPart($text, 'C');
+	}
+
+	/**
+	 * Turn Markdown link shortcuts into XHTML <a> tags.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doAnchors($text) {
+		if ($this->in_anchor) {
+			return $text;
+		}
+		$this->in_anchor = true;
+
+		// First, handle reference-style links: [link text] [id]
+		$text = preg_replace_callback('{
+			(					# wrap whole match in $1
+			  \[
+				(' . $this->nested_brackets_re . ')	# link text = $2
+			  \]
+
+			  [ ]?				# one optional space
+			  (?:\n[ ]*)?		# one optional newline followed by spaces
+
+			  \[
+				(.*?)		# id = $3
+			  \]
+			)
+			}xs',
+			array($this, '_doAnchors_reference_callback'), $text);
+
+		// Next, inline-style links: [link text](url "optional title")
+		$text = preg_replace_callback('{
+			(				# wrap whole match in $1
+			  \[
+				(' . $this->nested_brackets_re . ')	# link text = $2
+			  \]
+			  \(			# literal paren
+				[ \n]*
+				(?:
+					<(.+?)>	# href = $3
+				|
+					(' . $this->nested_url_parenthesis_re . ')	# href = $4
+				)
+				[ \n]*
+				(			# $5
+				  ([\'"])	# quote char = $6
+				  (.*?)		# Title = $7
+				  \6		# matching quote
+				  [ \n]*	# ignore any spaces/tabs between closing quote and )
+				)?			# title is optional
+			  \)
+			  (?:[ ]? ' . $this->id_class_attr_catch_re . ' )?	 # $8 = id/class attributes
+			)
+			}xs',
+			array($this, '_doAnchors_inline_callback'), $text);
+
+		// Last, handle reference-style shortcuts: [link text]
+		// These must come last in case you've also got [link text][1]
+		// or [link text](/foo)
+		$text = preg_replace_callback('{
+			(					# wrap whole match in $1
+			  \[
+				([^\[\]]+)		# link text = $2; can\'t contain [ or ]
+			  \]
+			)
+			}xs',
+			array($this, '_doAnchors_reference_callback'), $text);
+
+		$this->in_anchor = false;
+		return $text;
+	}
+
+	/**
+	 * Callback for reference anchors
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doAnchors_reference_callback($matches) {
+		$whole_match =  $matches[1];
+		$link_text   =  $matches[2];
+		$link_id     =& $matches[3];
+
+		if ($link_id == "") {
+			// for shortcut links like [this][] or [this].
+			$link_id = $link_text;
+		}
+		
+		// lower-case and turn embedded newlines into spaces
+		$link_id = strtolower($link_id);
+		$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
+
+		if (isset($this->urls[$link_id])) {
+			$url = $this->urls[$link_id];
+			$url = $this->encodeURLAttribute($url);
+			
+			$result = "<a href=\"$url\"";
+			if ( isset( $this->titles[$link_id] ) ) {
+				$title = $this->titles[$link_id];
+				$title = $this->encodeAttribute($title);
+				$result .=  " title=\"$title\"";
+			}
+			if (isset($this->ref_attr[$link_id]))
+				$result .= $this->ref_attr[$link_id];
+		
+			$link_text = $this->runSpanGamut($link_text);
+			$result .= ">$link_text</a>";
+			$result = $this->hashPart($result);
+		}
+		else {
+			$result = $whole_match;
+		}
+		return $result;
+	}
+
+	/**
+	 * Callback for inline anchors
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doAnchors_inline_callback($matches) {
+		$whole_match	=  $matches[1];
+		$link_text		=  $this->runSpanGamut($matches[2]);
+		$url			=  $matches[3] == '' ? $matches[4] : $matches[3];
+		$title			=& $matches[7];
+		$attr  = $this->doExtraAttributes("a", $dummy =& $matches[8]);
+
+		// if the URL was of the form <s p a c e s> it got caught by the HTML
+		// tag parser and hashed. Need to reverse the process before using the URL.
+		$unhashed = $this->unhash($url);
+		if ($unhashed != $url)
+			$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
+
+		$url = $this->encodeURLAttribute($url);
+
+		$result = "<a href=\"$url\"";
+		if (isset($title)) {
+			$title = $this->encodeAttribute($title);
+			$result .=  " title=\"$title\"";
+		}
+		$result .= $attr;
+		
+		$link_text = $this->runSpanGamut($link_text);
+		$result .= ">$link_text</a>";
+
+		return $this->hashPart($result);
+	}
+
+	/**
+	 * Turn Markdown image shortcuts into <img> tags.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doImages($text) {
+		// First, handle reference-style labeled images: ![alt text][id]
+		$text = preg_replace_callback('{
+			(				# wrap whole match in $1
+			  !\[
+				(' . $this->nested_brackets_re . ')		# alt text = $2
+			  \]
+
+			  [ ]?				# one optional space
+			  (?:\n[ ]*)?		# one optional newline followed by spaces
+
+			  \[
+				(.*?)		# id = $3
+			  \]
+
+			)
+			}xs', 
+			array($this, '_doImages_reference_callback'), $text);
+
+		// Next, handle inline images:  ![alt text](url "optional title")
+		// Don't forget: encode * and _
+		$text = preg_replace_callback('{
+			(				# wrap whole match in $1
+			  !\[
+				(' . $this->nested_brackets_re . ')		# alt text = $2
+			  \]
+			  \s?			# One optional whitespace character
+			  \(			# literal paren
+				[ \n]*
+				(?:
+					<(\S*)>	# src url = $3
+				|
+					(' . $this->nested_url_parenthesis_re . ')	# src url = $4
+				)
+				[ \n]*
+				(			# $5
+				  ([\'"])	# quote char = $6
+				  (.*?)		# title = $7
+				  \6		# matching quote
+				  [ \n]*
+				)?			# title is optional
+			  \)
+			  (?:[ ]? ' . $this->id_class_attr_catch_re . ' )?	 # $8 = id/class attributes
+			)
+			}xs',
+			array($this, '_doImages_inline_callback'), $text);
+
+		return $text;
+	}
+
+	/**
+	 * Callback for referenced images
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doImages_reference_callback($matches) {
+		$whole_match = $matches[1];
+		$alt_text    = $matches[2];
+		$link_id     = strtolower($matches[3]);
+
+		if ($link_id == "") {
+			$link_id = strtolower($alt_text); // for shortcut links like ![this][].
+		}
+
+		$alt_text = $this->encodeAttribute($alt_text);
+		if (isset($this->urls[$link_id])) {
+			$url = $this->encodeURLAttribute($this->urls[$link_id]);
+			$result = "<img src=\"$url\" alt=\"$alt_text\"";
+			if (isset($this->titles[$link_id])) {
+				$title = $this->titles[$link_id];
+				$title = $this->encodeAttribute($title);
+				$result .=  " title=\"$title\"";
+			}
+			if (isset($this->ref_attr[$link_id]))
+				$result .= $this->ref_attr[$link_id];
+			$result .= $this->empty_element_suffix;
+			$result = $this->hashPart($result);
+		}
+		else {
+			// If there's no such link ID, leave intact:
+			$result = $whole_match;
+		}
+
+		return $result;
+	}
+
+	/**
+	 * Callback for inline images
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doImages_inline_callback($matches) {
+		$whole_match	= $matches[1];
+		$alt_text		= $matches[2];
+		$url			= $matches[3] == '' ? $matches[4] : $matches[3];
+		$title			=& $matches[7];
+		$attr  = $this->doExtraAttributes("img", $dummy =& $matches[8]);
+
+		$alt_text = $this->encodeAttribute($alt_text);
+		$url = $this->encodeURLAttribute($url);
+		$result = "<img src=\"$url\" alt=\"$alt_text\"";
+		if (isset($title)) {
+			$title = $this->encodeAttribute($title);
+			$result .=  " title=\"$title\""; // $title already quoted
+		}
+		$result .= $attr;
+		$result .= $this->empty_element_suffix;
+
+		return $this->hashPart($result);
+	}
+
+	/**
+	 * Process markdown headers. Redefined to add ID and class attribute support.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doHeaders($text) {
+		// Setext-style headers:
+		//  Header 1  {#header1}
+		//	  ========
+		//  
+		//	  Header 2  {#header2 .class1 .class2}
+		//	  --------
+		//
+		$text = preg_replace_callback(
+			'{
+				(^.+?)								# $1: Header text
+				(?:[ ]+ ' . $this->id_class_attr_catch_re . ' )?	 # $3 = id/class attributes
+				[ ]*\n(=+|-+)[ ]*\n+				# $3: Header footer
+			}mx',
+			array($this, '_doHeaders_callback_setext'), $text);
+
+		// atx-style headers:
+		//	# Header 1        {#header1}
+		//	## Header 2       {#header2}
+		//	## Header 2 with closing hashes ##  {#header3.class1.class2}
+		//	...
+		//	###### Header 6   {.class2}
+		//
+		$text = preg_replace_callback('{
+				^(\#{1,6})	# $1 = string of #\'s
+				[ ]*
+				(.+?)		# $2 = Header text
+				[ ]*
+				\#*			# optional closing #\'s (not counted)
+				(?:[ ]+ ' . $this->id_class_attr_catch_re . ' )?	 # $3 = id/class attributes
+				[ ]*
+				\n+
+			}xm',
+			array($this, '_doHeaders_callback_atx'), $text);
+
+		return $text;
+	}
+
+	/**
+	 * Callback for setext headers
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doHeaders_callback_setext($matches) {
+		if ($matches[3] == '-' && preg_match('{^- }', $matches[1])) {
+			return $matches[0];
+		}
+
+		$level = $matches[3]{0} == '=' ? 1 : 2;
+
+		$defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[1]) : null;
+
+		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[2], $defaultId);
+		$block = "<h$level$attr>" . $this->runSpanGamut($matches[1]) . "</h$level>";
+		return "\n" . $this->hashBlock($block) . "\n\n";
+	}
+
+	/**
+	 * Callback for atx headers
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doHeaders_callback_atx($matches) {
+		$level = strlen($matches[1]);
+
+		$defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[2]) : null;
+		$attr  = $this->doExtraAttributes("h$level", $dummy =& $matches[3], $defaultId);
+		$block = "<h$level$attr>" . $this->runSpanGamut($matches[2]) . "</h$level>";
+		return "\n" . $this->hashBlock($block) . "\n\n";
+	}
+
+	/**
+	 * Form HTML tables.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doTables($text) {
+		$less_than_tab = $this->tab_width - 1;
+		// Find tables with leading pipe.
+		//
+		//	| Header 1 | Header 2
+		//	| -------- | --------
+		//	| Cell 1   | Cell 2
+		//	| Cell 3   | Cell 4
+		$text = preg_replace_callback('
+			{
+				^							# Start of a line
+				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
+				[|]							# Optional leading pipe (present)
+				(.+) \n						# $1: Header row (at least one pipe)
+				
+				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
+				[|] ([ ]*[-:]+[-| :]*) \n	# $2: Header underline
+				
+				(							# $3: Cells
+					(?>
+						[ ]*				# Allowed whitespace.
+						[|] .* \n			# Row content.
+					)*
+				)
+				(?=\n|\Z)					# Stop at final double newline.
+			}xm',
+			array($this, '_doTable_leadingPipe_callback'), $text);
+
+		// Find tables without leading pipe.
+		//
+		//	Header 1 | Header 2
+		//	-------- | --------
+		//	Cell 1   | Cell 2
+		//	Cell 3   | Cell 4
+		$text = preg_replace_callback('
+			{
+				^							# Start of a line
+				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
+				(\S.*[|].*) \n				# $1: Header row (at least one pipe)
+				
+				[ ]{0,' . $less_than_tab . '}	# Allowed whitespace.
+				([-:]+[ ]*[|][-| :]*) \n	# $2: Header underline
+				
+				(							# $3: Cells
+					(?>
+						.* [|] .* \n		# Row content
+					)*
+				)
+				(?=\n|\Z)					# Stop at final double newline.
+			}xm',
+			array($this, '_DoTable_callback'), $text);
+
+		return $text;
+	}
+
+	/**
+	 * Callback for removing the leading pipe for each row
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doTable_leadingPipe_callback($matches) {
+		$head		= $matches[1];
+		$underline	= $matches[2];
+		$content	= $matches[3];
+
+		$content	= preg_replace('/^ *[|]/m', '', $content);
+		
+		return $this->_doTable_callback(array($matches[0], $head, $underline, $content));
+	}
+
+	/**
+	 * Make the align attribute in a table
+	 * @param  string $alignname
+	 * @return string
+	 */
+	protected function _doTable_makeAlignAttr($alignname)
+	{
+		if (empty($this->table_align_class_tmpl)) {
+			return " align=\"$alignname\"";
+		}
+
+		$classname = str_replace('%%', $alignname, $this->table_align_class_tmpl);
+		return " class=\"$classname\"";
+	}
+
+	/**
+	 * Calback for processing tables
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doTable_callback($matches) {
+		$head		= $matches[1];
+		$underline	= $matches[2];
+		$content	= $matches[3];
+
+		// Remove any tailing pipes for each line.
+		$head		= preg_replace('/[|] *$/m', '', $head);
+		$underline	= preg_replace('/[|] *$/m', '', $underline);
+		$content	= preg_replace('/[|] *$/m', '', $content);
+		
+		// Reading alignement from header underline.
+		$separators	= preg_split('/ *[|] */', $underline);
+		foreach ($separators as $n => $s) {
+			if (preg_match('/^ *-+: *$/', $s))
+				$attr[$n] = $this->_doTable_makeAlignAttr('right');
+			else if (preg_match('/^ *:-+: *$/', $s))
+				$attr[$n] = $this->_doTable_makeAlignAttr('center');
+			else if (preg_match('/^ *:-+ *$/', $s))
+				$attr[$n] = $this->_doTable_makeAlignAttr('left');
+			else
+				$attr[$n] = '';
+		}
+		
+		// Parsing span elements, including code spans, character escapes, 
+		// and inline HTML tags, so that pipes inside those gets ignored.
+		$head		= $this->parseSpan($head);
+		$headers	= preg_split('/ *[|] */', $head);
+		$col_count	= count($headers);
+		$attr       = array_pad($attr, $col_count, '');
+		
+		// Write column headers.
+		$text = "<table>\n";
+		$text .= "<thead>\n";
+		$text .= "<tr>\n";
+		foreach ($headers as $n => $header)
+			$text .= "  <th$attr[$n]>" . $this->runSpanGamut(trim($header)) . "</th>\n";
+		$text .= "</tr>\n";
+		$text .= "</thead>\n";
+		
+		// Split content by row.
+		$rows = explode("\n", trim($content, "\n"));
+		
+		$text .= "<tbody>\n";
+		foreach ($rows as $row) {
+			// Parsing span elements, including code spans, character escapes, 
+			// and inline HTML tags, so that pipes inside those gets ignored.
+			$row = $this->parseSpan($row);
+			
+			// Split row by cell.
+			$row_cells = preg_split('/ *[|] */', $row, $col_count);
+			$row_cells = array_pad($row_cells, $col_count, '');
+			
+			$text .= "<tr>\n";
+			foreach ($row_cells as $n => $cell)
+				$text .= "  <td$attr[$n]>" . $this->runSpanGamut(trim($cell)) . "</td>\n";
+			$text .= "</tr>\n";
+		}
+		$text .= "</tbody>\n";
+		$text .= "</table>";
+		
+		return $this->hashBlock($text) . "\n";
+	}
+
+	/**
+	 * Form HTML definition lists.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doDefLists($text) {
+		$less_than_tab = $this->tab_width - 1;
+
+		// Re-usable pattern to match any entire dl list:
+		$whole_list_re = '(?>
+			(								# $1 = whole list
+			  (								# $2
+				[ ]{0,' . $less_than_tab . '}
+				((?>.*\S.*\n)+)				# $3 = defined term
+				\n?
+				[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
+			  )
+			  (?s:.+?)
+			  (								# $4
+				  \z
+				|
+				  \n{2,}
+				  (?=\S)
+				  (?!						# Negative lookahead for another term
+					[ ]{0,' . $less_than_tab . '}
+					(?: \S.*\n )+?			# defined term
+					\n?
+					[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
+				  )
+				  (?!						# Negative lookahead for another definition
+					[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
+				  )
+			  )
+			)
+		)'; // mx
+
+		$text = preg_replace_callback('{
+				(?>\A\n?|(?<=\n\n))
+				' . $whole_list_re . '
+			}mx',
+			array($this, '_doDefLists_callback'), $text);
+
+		return $text;
+	}
+
+	/**
+	 * Callback for processing definition lists
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doDefLists_callback($matches) {
+		// Re-usable patterns to match list item bullets and number markers:
+		$list = $matches[1];
+		
+		// Turn double returns into triple returns, so that we can make a
+		// paragraph for the last item in a list, if necessary:
+		$result = trim($this->processDefListItems($list));
+		$result = "<dl>\n" . $result . "\n</dl>";
+		return $this->hashBlock($result) . "\n\n";
+	}
+
+	/**
+	 * Process the contents of a single definition list, splitting it
+	 * into individual term and definition list items.
+	 * @param  string $list_str
+	 * @return string
+	 */
+	protected function processDefListItems($list_str) {
+	
+		$less_than_tab = $this->tab_width - 1;
+		
+		// Trim trailing blank lines:
+		$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
+
+		// Process definition terms.
+		$list_str = preg_replace_callback('{
+			(?>\A\n?|\n\n+)						# leading line
+			(									# definition terms = $1
+				[ ]{0,' . $less_than_tab . '}	# leading whitespace
+				(?!\:[ ]|[ ])					# negative lookahead for a definition
+												#   mark (colon) or more whitespace.
+				(?> \S.* \n)+?					# actual term (not whitespace).	
+			)			
+			(?=\n?[ ]{0,3}:[ ])					# lookahead for following line feed 
+												#   with a definition mark.
+			}xm',
+			array($this, '_processDefListItems_callback_dt'), $list_str);
+
+		// Process actual definitions.
+		$list_str = preg_replace_callback('{
+			\n(\n+)?							# leading line = $1
+			(									# marker space = $2
+				[ ]{0,' . $less_than_tab . '}	# whitespace before colon
+				\:[ ]+							# definition mark (colon)
+			)
+			((?s:.+?))							# definition text = $3
+			(?= \n+ 							# stop at next definition mark,
+				(?:								# next term or end of text
+					[ ]{0,' . $less_than_tab . '} \:[ ]	|
+					<dt> | \z
+				)						
+			)					
+			}xm',
+			array($this, '_processDefListItems_callback_dd'), $list_str);
+
+		return $list_str;
+	}
+
+	/**
+	 * Callback for <dt> elements in definition lists
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _processDefListItems_callback_dt($matches) {
+		$terms = explode("\n", trim($matches[1]));
+		$text = '';
+		foreach ($terms as $term) {
+			$term = $this->runSpanGamut(trim($term));
+			$text .= "\n<dt>" . $term . "</dt>";
+		}
+		return $text . "\n";
+	}
+
+	/**
+	 * Callback for <dd> elements in definition lists
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _processDefListItems_callback_dd($matches) {
+		$leading_line	= $matches[1];
+		$marker_space	= $matches[2];
+		$def			= $matches[3];
+
+		if ($leading_line || preg_match('/\n{2,}/', $def)) {
+			// Replace marker with the appropriate whitespace indentation
+			$def = str_repeat(' ', strlen($marker_space)) . $def;
+			$def = $this->runBlockGamut($this->outdent($def . "\n\n"));
+			$def = "\n". $def ."\n";
+		}
+		else {
+			$def = rtrim($def);
+			$def = $this->runSpanGamut($this->outdent($def));
+		}
+
+		return "\n<dd>" . $def . "</dd>\n";
+	}
+
+	/**
+	 * Adding the fenced code block syntax to regular Markdown:
+	 *
+	 * ~~~
+	 * Code block
+	 * ~~~
+	 * 
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doFencedCodeBlocks($text) {
+	
+		$less_than_tab = $this->tab_width;
+		
+		$text = preg_replace_callback('{
+				(?:\n|\A)
+				# 1: Opening marker
+				(
+					(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
+				)
+				[ ]*
+				(?:
+					\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
+				)?
+				[ ]*
+				(?:
+					' . $this->id_class_attr_catch_re . ' # 3: Extra attributes
+				)?
+				[ ]* \n # Whitespace and newline following marker.
+				
+				# 4: Content
+				(
+					(?>
+						(?!\1 [ ]* \n)	# Not a closing marker.
+						.*\n+
+					)+
+				)
+				
+				# Closing marker.
+				\1 [ ]* (?= \n )
+			}xm',
+			array($this, '_doFencedCodeBlocks_callback'), $text);
+
+		return $text;
+	}
+
+	/**
+	 * Callback to process fenced code blocks
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doFencedCodeBlocks_callback($matches) {
+		$classname =& $matches[2];
+		$attrs     =& $matches[3];
+		$codeblock = $matches[4];
+
+		if ($this->code_block_content_func) {
+			$codeblock = call_user_func($this->code_block_content_func, $codeblock, $classname);
+		} else {
+			$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
+		}
+
+		$codeblock = preg_replace_callback('/^\n+/',
+			array($this, '_doFencedCodeBlocks_newlines'), $codeblock);
+
+		$classes = array();
+		if ($classname != "") {
+			if ($classname{0} == '.')
+				$classname = substr($classname, 1);
+			$classes[] = $this->code_class_prefix . $classname;
+		}
+		$attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs, null, $classes);
+		$pre_attr_str  = $this->code_attr_on_pre ? $attr_str : '';
+		$code_attr_str = $this->code_attr_on_pre ? '' : $attr_str;
+		$codeblock  = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>";
+		
+		return "\n\n".$this->hashBlock($codeblock)."\n\n";
+	}
+
+	/**
+	 * Replace new lines in fenced code blocks
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doFencedCodeBlocks_newlines($matches) {
+		return str_repeat("<br$this->empty_element_suffix", 
+			strlen($matches[0]));
+	}
+
+	/**
+	 * Redefining emphasis markers so that emphasis by underscore does not
+	 * work in the middle of a word.
+	 * @var array
+	 */
+	protected $em_relist = array(
+		''  => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
+		'*' => '(?<![\s*])\*(?!\*)',
+		'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
+	);
+	protected $strong_relist = array(
+		''   => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
+		'**' => '(?<![\s*])\*\*(?!\*)',
+		'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
+	);
+	protected $em_strong_relist = array(
+		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
+		'***' => '(?<![\s*])\*\*\*(?!\*)',
+		'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
+	);
+
+	/**
+	 * Parse text into paragraphs
+	 * @param  string $text String to process in paragraphs
+	 * @param  boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags
+	 * @return string       HTML output
+	 */
+	protected function formParagraphs($text, $wrap_in_p = true) {
+		// Strip leading and trailing lines:
+		$text = preg_replace('/\A\n+|\n+\z/', '', $text);
+
+		$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
+
+		// Wrap <p> tags and unhashify HTML blocks
+		foreach ($grafs as $key => $value) {
+			$value = trim($this->runSpanGamut($value));
+			
+			// Check if this should be enclosed in a paragraph.
+			// Clean tag hashes & block tag hashes are left alone.
+			$is_p = $wrap_in_p && !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
+			
+			if ($is_p) {
+				$value = "<p>$value</p>";
+			}
+			$grafs[$key] = $value;
+		}
+		
+		// Join grafs in one text, then unhash HTML tags. 
+		$text = implode("\n\n", $grafs);
+		
+		// Finish by removing any tag hashes still present in $text.
+		$text = $this->unhash($text);
+		
+		return $text;
+	}
+	
+	
+	/**
+	 * Footnotes - Strips link definitions from text, stores the URLs and
+	 * titles in hash references.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function stripFootnotes($text) {
+		$less_than_tab = $this->tab_width - 1;
+
+		// Link defs are in the form: [^id]: url "optional title"
+		$text = preg_replace_callback('{
+			^[ ]{0,' . $less_than_tab . '}\[\^(.+?)\][ ]?:	# note_id = $1
+			  [ ]*
+			  \n?					# maybe *one* newline
+			(						# text = $2 (no blank lines allowed)
+				(?:					
+					.+				# actual text
+				|
+					\n				# newlines but 
+					(?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker.
+					(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed 
+									# by non-indented content
+				)*
+			)		
+			}xm',
+			array($this, '_stripFootnotes_callback'),
+			$text);
+		return $text;
+	}
+
+	/**
+	 * Callback for stripping footnotes
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _stripFootnotes_callback($matches) {
+		$note_id = $this->fn_id_prefix . $matches[1];
+		$this->footnotes[$note_id] = $this->outdent($matches[2]);
+		return ''; // String that will replace the block
+	}
+
+	/**
+	 * Replace footnote references in $text [^id] with a special text-token 
+	 * which will be replaced by the actual footnote marker in appendFootnotes.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doFootnotes($text) {
+		if (!$this->in_anchor) {
+			$text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text);
+		}
+		return $text;
+	}
+
+	/**
+	 * Append footnote list to text
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function appendFootnotes($text) {
+		$text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
+			array($this, '_appendFootnotes_callback'), $text);
+	
+		if (!empty($this->footnotes_ordered)) {
+			$text .= "\n\n";
+			$text .= "<div class=\"footnotes\">\n";
+			$text .= "<hr" . $this->empty_element_suffix . "\n";
+			$text .= "<ol>\n\n";
+
+			$attr = "";
+			if ($this->fn_backlink_class != "") {
+				$class = $this->fn_backlink_class;
+				$class = $this->encodeAttribute($class);
+				$attr .= " class=\"$class\"";
+			}
+			if ($this->fn_backlink_title != "") {
+				$title = $this->fn_backlink_title;
+				$title = $this->encodeAttribute($title);
+				$attr .= " title=\"$title\"";
+			}
+			$backlink_text = $this->fn_backlink_html;
+			$num = 0;
+			
+			while (!empty($this->footnotes_ordered)) {
+				$footnote = reset($this->footnotes_ordered);
+				$note_id = key($this->footnotes_ordered);
+				unset($this->footnotes_ordered[$note_id]);
+				$ref_count = $this->footnotes_ref_count[$note_id];
+				unset($this->footnotes_ref_count[$note_id]);
+				unset($this->footnotes[$note_id]);
+				
+				$footnote .= "\n"; // Need to append newline before parsing.
+				$footnote = $this->runBlockGamut("$footnote\n");				
+				$footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', 
+					array($this, '_appendFootnotes_callback'), $footnote);
+				
+				$attr = str_replace("%%", ++$num, $attr);
+				$note_id = $this->encodeAttribute($note_id);
+
+				// Prepare backlink, multiple backlinks if multiple references
+				$backlink = "<a href=\"#fnref:$note_id\"$attr>$backlink_text</a>";
+				for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) {
+					$backlink .= " <a href=\"#fnref$ref_num:$note_id\"$attr>$backlink_text</a>";
+				}
+				// Add backlink to last paragraph; create new paragraph if needed.
+				if (preg_match('{</p>$}', $footnote)) {
+					$footnote = substr($footnote, 0, -4) . "&#160;$backlink</p>";
+				} else {
+					$footnote .= "\n\n<p>$backlink</p>";
+				}
+				
+				$text .= "<li id=\"fn:$note_id\">\n";
+				$text .= $footnote . "\n";
+				$text .= "</li>\n\n";
+			}
+			
+			$text .= "</ol>\n";
+			$text .= "</div>";
+		}
+		return $text;
+	}
+
+	/**
+	 * Callback for appending footnotes
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _appendFootnotes_callback($matches) {
+		$node_id = $this->fn_id_prefix . $matches[1];
+		
+		// Create footnote marker only if it has a corresponding footnote *and*
+		// the footnote hasn't been used by another marker.
+		if (isset($this->footnotes[$node_id])) {
+			$num =& $this->footnotes_numbers[$node_id];
+			if (!isset($num)) {
+				// Transfer footnote content to the ordered list and give it its
+				// number
+				$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
+				$this->footnotes_ref_count[$node_id] = 1;
+				$num = $this->footnote_counter++;
+				$ref_count_mark = '';
+			} else {
+				$ref_count_mark = $this->footnotes_ref_count[$node_id] += 1;
+			}
+
+			$attr = "";
+			if ($this->fn_link_class != "") {
+				$class = $this->fn_link_class;
+				$class = $this->encodeAttribute($class);
+				$attr .= " class=\"$class\"";
+			}
+			if ($this->fn_link_title != "") {
+				$title = $this->fn_link_title;
+				$title = $this->encodeAttribute($title);
+				$attr .= " title=\"$title\"";
+			}
+			
+			$attr = str_replace("%%", $num, $attr);
+			$node_id = $this->encodeAttribute($node_id);
+			
+			return
+				"<sup id=\"fnref$ref_count_mark:$node_id\">".
+				"<a href=\"#fn:$node_id\"$attr>$num</a>".
+				"</sup>";
+		}
+		
+		return "[^" . $matches[1] . "]";
+	}
+		
+	
+	/**
+	 * Abbreviations - strips abbreviations from text, stores titles in hash
+	 * references.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function stripAbbreviations($text) {
+		$less_than_tab = $this->tab_width - 1;
+
+		// Link defs are in the form: [id]*: url "optional title"
+		$text = preg_replace_callback('{
+			^[ ]{0,' . $less_than_tab . '}\*\[(.+?)\][ ]?:	# abbr_id = $1
+			(.*)					# text = $2 (no blank lines allowed)	
+			}xm',
+			array($this, '_stripAbbreviations_callback'),
+			$text);
+		return $text;
+	}
+
+	/**
+	 * Callback for stripping abbreviations
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _stripAbbreviations_callback($matches) {
+		$abbr_word = $matches[1];
+		$abbr_desc = $matches[2];
+		if ($this->abbr_word_re) {
+			$this->abbr_word_re .= '|';
+		}
+		$this->abbr_word_re .= preg_quote($abbr_word);
+		$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
+		return ''; // String that will replace the block
+	}
+
+	/**
+	 * Find defined abbreviations in text and wrap them in <abbr> elements.
+	 * @param  string $text
+	 * @return string
+	 */
+	protected function doAbbreviations($text) {
+		if ($this->abbr_word_re) {
+			// cannot use the /x modifier because abbr_word_re may 
+			// contain significant spaces:
+			$text = preg_replace_callback('{' .
+				'(?<![\w\x1A])' .
+				'(?:' . $this->abbr_word_re . ')' .
+				'(?![\w\x1A])' .
+				'}',
+				array($this, '_doAbbreviations_callback'), $text);
+		}
+		return $text;
+	}
+
+	/**
+	 * Callback for processing abbreviations
+	 * @param  array $matches
+	 * @return string
+	 */
+	protected function _doAbbreviations_callback($matches) {
+		$abbr = $matches[0];
+		if (isset($this->abbr_desciptions[$abbr])) {
+			$desc = $this->abbr_desciptions[$abbr];
+			if (empty($desc)) {
+				return $this->hashPart("<abbr>$abbr</abbr>");
+			} else {
+				$desc = $this->encodeAttribute($desc);
+				return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
+			}
+		} else {
+			return $matches[0];
+		}
+	}
 }
-

library/php-markdown/Michelf/MarkdownInterface.inc.php

@@ -1,9 +1,9 @@
 <?php
 
-# Use this file if you cannot use class autoloading. It will include all the
+// Use this file if you cannot use class autoloading. It will include all the
-# files needed for the MarkdownInterface interface.
+// files needed for the MarkdownInterface interface.
-#
+//
-# Take a look at the PSR-0-compatible class autoloading implementation
+// Take a look at the PSR-0-compatible class autoloading implementation
-# in the Readme.php file if you want a simple autoloader setup.
+// in the Readme.php file if you want a simple autoloader setup.
 
 require_once dirname(__FILE__) . '/MarkdownInterface.php';

library/php-markdown/Michelf/MarkdownInterface.php

@@ -1,34 +1,38 @@
 <?php
-#
+/**
-# Markdown  -  A text-to-HTML conversion tool for web writers
+ * Markdown  -  A text-to-HTML conversion tool for web writers
-#
+ *
-# PHP Markdown
+ * @package   php-markdown
-# Copyright (c) 2004-2014 Michel Fortin
+ * @author    Michel Fortin <michel.fortin@michelf.com>
-# <http://michelf.com/projects/php-markdown/>
+ * @copyright 2004-2016 Michel Fortin <https://michelf.com/projects/php-markdown/>
-#
+ * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
-# Original Markdown
+ */
-# Copyright (c) 2004-2006 John Gruber
+
-# <http://daringfireball.net/projects/markdown/>
-#
 namespace Michelf;
 
-
+/**
-#
+ * Markdown Parser Interface 
-# Markdown Parser Interface
+ */
-#
-
 interface MarkdownInterface {
+	/**
+	 * Initialize the parser and return the result of its transform method.
+	 * This will work fine for derived classes too.
+	 *
+	 * @api
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
+	public static function defaultTransform($text);
 
-  #
+	/**
-  # Initialize the parser and return the result of its transform method.
+	 * Main function. Performs some preprocessing on the input text
-  # This will work fine for derived classes too.
+	 * and pass it through the document gamut.
-  #
+	 *
-  public static function defaultTransform($text);
+	 * @api
-
+	 *
-  #
+	 * @param  string $text
-  # Main function. Performs some preprocessing on the input text
+	 * @return string
-  # and pass it through the document gamut.
+	 */
-  #
+	public function transform($text);
-  public function transform($text);
-
 }

library/php-markdown/Readme.md

@@ -1,13 +1,13 @@
 PHP Markdown
 ============
 
-PHP Markdown Lib 1.4.1 - 4 May 2013
+PHP Markdown Lib 1.7.0 - 29 Oct 2016
 
 by Michel Fortin  
-<http://michelf.ca/>
+<https://michelf.ca/>
 
 based on Markdown by John Gruber  
-<http://daringfireball.net/>
+<https://daringfireball.net/>
 
 
 Introduction
@@ -25,10 +25,10 @@ software tool, originally written in Perl, that converts the plain text
 markup to HTML. PHP Markdown is a port to PHP of the original Markdown 
 program by John Gruber.
 
-*	[Full documentation of the Markdown syntax](<http://daringfireball.net/projects/markdown/>)
+*	[Full documentation of the Markdown syntax](<https://daringfireball.net/projects/markdown/>)  
-	- Daring Fireball (John Gruber)
+	— Daring Fireball (John Gruber)
-*	[Markdown Extra syntax additions](<http://michelf.ca/projects/php-markdown/extra/>)
+*	[Markdown Extra syntax additions](<https://michelf.ca/projects/php-markdown/extra/>)  
-	- Michel Fortin
+	— Michel Fortin
 
 
 Requirement
@@ -83,7 +83,7 @@ configuration variables:
 
 To learn more, see the full list of [configuration variables].
 
- [configuration variables]: http://michelf.ca/projects/php-markdown/configuration/
+ [configuration variables]: https://michelf.ca/projects/php-markdown/configuration/
 
 
 ### Usage without an autoloader
@@ -149,7 +149,7 @@ Development and Testing
 -----------------------
 
 Pull requests for fixing bugs are welcome. Proposed new features are
-going meticulously reviewed -- taking into account backward compatibility, 
+going to be meticulously reviewed -- taking into account backward compatibility, 
 potential side effects, and future extensibility -- before deciding on
 acceptance or rejection.
 
@@ -174,11 +174,80 @@ PHP Markdown, please visit [michelf.ca/donate] or send Bitcoin to
 Version History
 ---------------
 
-Unreleased
+PHP Markdown Lib 1.7.0 (29 Oct 2016)
 
-*	Added the ability to insert custom HTML attributes everywhere an extra
+*	Added a `hard_wrap` configuration variable to make all newline characters 
-	attribute block is allowed (links, images, headers). Credits to
+	in the text become `<br>` tags in the HTML output. By default, according 
-	Peter Droogmans for providing the implementation.
+	to the standard Markdown syntax these newlines are ignored unless they a 
+	preceded by two spaces. Thanks to Jonathan Cohlmeyer for the implementation.
+
+*	Improved the parsing of list items to fix problematic cases that came to 
+	light with the addition of `hard_wrap`. This should have no effect on the 
+	output except span-level list items that ended with two spaces (and thus 
+	ended with a line break).
+
+*	Added a `code_span_content_func` configuration variable which takes a 
+	function that will convert the content of the code span to HTML. This can
+	be useful to implement syntax highlighting. Although contrary to its 
+	code block equivalent, there is no syntax for specifying a language. 
+	Credits to styxit for the implementation.
+
+*	Fixed a Markdown Extra issue where two-space-at-end-of-line hard breaks 
+	wouldn't work inside of HTML block elements such as `<p markdown="1">` 
+	where the element expects only span-level content.
+
+*	In the parser code, switched to PHPDoc comment format. Thanks to 
+	Robbie Averill for the help.
+
+
+PHP Markdown Lib 1.6.0 (23 Dec 2015)  
+
+Note: this version was incorrectly released as 1.5.1 on Dec 22, a number 
+that contradicted the versioning policy.
+
+*	For fenced code blocks in Markdown Extra, can now set a class name for the 
+	code block's language before the special attribute block. Previously, this 
+	class name was only allowed in the absence of the special attribute block.
+
+*	Added a `code_block_content_func` configuration variable which takes a 
+	function that will convert the content of the code block to HTML. This is 
+	most useful for syntax highlighting. For fenced code blocks in Markdown 
+	Extra, the function has access to the language class name (the one outside 
+	of the special attribute block). Credits to Mario Konrad for providing the 
+	implementation.
+
+*	The curled arrow character for the backlink in footnotes is now followed
+	by a Unicode variant selector to prevent it from being displayed in emoji
+	form on iOS.
+
+	Note that in older browsers the variant selector is often interpreted as a 
+	separate character, making it visible after the arrow. So there is now a 
+	also a `fn_backlink_html` configuration variable that can be used to set 
+	the link text to something else. Credits to Dana for providing the 
+	implementation.
+
+*	Fixed an issue in MarkdownExtra where long header lines followed by a
+	special attribute block would hit the backtrack limit an cause an empty
+	string to be returned.
+
+
+PHP Markdown Lib 1.5.0 (1 Mar 2015)
+
+*	Added the ability start ordered lists with a number different from 1 and
+	and have that reflected in the HTML output. This can be enabled with
+	the `enhanced_ordered_lists` configuration variable for the Markdown 
+	parser; it is enabled by default for Markdown Extra.
+	Credits to Matt Gorle for providing the implementation.
+
+*	Added the ability to insert custom HTML attributes with simple values 
+	everywhere an extra attribute block is allowed (links, images, headers).
+	The value must be unquoted, cannot contains spaces and is limited to 
+	alphanumeric ASCII characters.
+	Credits to Peter Droogmans for providing the implementation.
+
+*	Added a `header_id_func` configuration variable which takes a function
+	that can generate an `id` attribute value from the header text.
+	Credits to Evert Pot for providing the implementation.
 
 *	Added a `url_filter_func` configuration variable which takes a function
 	that can rewrite any link or image URL to something different.
@@ -239,7 +308,7 @@ PHP Markdown Extra 1.2.6:
 
 *	Plugin interface for WordPress and other systems is no longer present in
 	the Lib package. The classic package is still available if you need it:
-	<http://michelf.ca/projects/php-markdown/classic/>
+	<https://michelf.ca/projects/php-markdown/classic/>
 
 *	Added `public` and `protected` protection attributes, plus a section about
 	what is "public API" and what isn't in the Readme file.
@@ -277,13 +346,13 @@ Copyright and License
 ---------------------
 
 PHP Markdown Lib
-Copyright (c) 2004-2014 Michel Fortin
+Copyright (c) 2004-2016 Michel Fortin
-<http://michelf.ca/>  
+<https://michelf.ca/>  
 All rights reserved.
 
 Based on Markdown  
 Copyright (c) 2003-2005 John Gruber   
-<http://daringfireball.net/>   
+<https://daringfireball.net/>   
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

library/php-markdown/Readme.php

@@ -1,18 +1,18 @@
 <?php
 
-# This file passes the content of the Readme.md file in the same directory
+// This file passes the content of the Readme.md file in the same directory
-# through the Markdown filter. You can adapt this sample code in any way
+// through the Markdown filter. You can adapt this sample code in any way
-# you like.
+// you like.
 
-# Install PSR-0-compatible class autoloader
+// Install PSR-0-compatible class autoloader
 spl_autoload_register(function($class){
 	require preg_replace('{\\\\|_(?!.*\\\\)}', DIRECTORY_SEPARATOR, ltrim($class, '\\')).'.php';
 });
 
-# Get Markdown class
+// Get Markdown class
 use \Michelf\Markdown;
 
-# Read file and pass content through the Markdown parser
+// Read file and pass content through the Markdown parser
 $text = file_get_contents('Readme.md');
 $html = Markdown::defaultTransform($text);
 
@@ -24,7 +24,7 @@ $html = Markdown::defaultTransform($text);
     </head>
     <body>
 		<?php
-			# Put HTML content in the document
+			// Put HTML content in the document
 			echo $html;
 		?>
     </body>

library/php-markdown/composer.json

@@ -2,19 +2,19 @@
 	"name": "michelf/php-markdown",
 	"type": "library",
 	"description": "PHP Markdown",
-	"homepage": "http://michelf.ca/projects/php-markdown/",
+	"homepage": "https://michelf.ca/projects/php-markdown/",
 	"keywords": ["markdown"],
 	"license": "BSD-3-Clause",
 	"authors": [
 		{
 			"name": "Michel Fortin",
 			"email": "michel.fortin@michelf.ca",
-			"homepage": "http://michelf.ca/",
+			"homepage": "https://michelf.ca/",
 			"role": "Developer"
 		},
 		{
 			"name": "John Gruber",
-			"homepage": "http://daringfireball.net/"
+			"homepage": "https://daringfireball.net/"
 		}
 	],
 	"require": {
@@ -22,10 +22,5 @@
 	},
 	"autoload": {
  		"psr-0": { "Michelf": "" }
-	},
-	"extra": {
-		"branch-alias": {
-			"dev-lib": "1.4.x-dev"
-		}
 	}
 }