libvpx: Pull from upstream

source/libvpx/examples/includes/PHP-Markdown-Extra-1.2.3/markdown.php

-<?php
-#
-# Markdown Extra  -  A text-to-HTML conversion tool for web writers
-#
-# PHP Markdown & Extra
-# Copyright (c) 2004-2008 Michel Fortin
-# <http://www.michelf.com/projects/php-markdown/>
-#
-# Original Markdown
-# Copyright (c) 2004-2006 John Gruber
-# <http://daringfireball.net/projects/markdown/>
-#
-
-
-define( 'MARKDOWN_VERSION',  "1.0.1m" ); # Sat 21 Jun 2008
-define( 'MARKDOWNEXTRA_VERSION',  "1.2.3" ); # Wed 31 Dec 2008
-
-
-#
-# Global default settings:
-#
-
-# Change to ">" for HTML output
-@define( 'MARKDOWN_EMPTY_ELEMENT_SUFFIX',  " />");
-
-# Define the width of a tab for code blocks.
-@define( 'MARKDOWN_TAB_WIDTH',     4 );
-
-# Optional title attribute for footnote links and backlinks.
-@define( 'MARKDOWN_FN_LINK_TITLE',         "" );
-@define( 'MARKDOWN_FN_BACKLINK_TITLE',     "" );
-
-# Optional class attribute for footnote links and backlinks.
-@define( 'MARKDOWN_FN_LINK_CLASS',         "" );
-@define( 'MARKDOWN_FN_BACKLINK_CLASS',     "" );
-
-
-#
-# WordPress settings:
-#
-
-# Change to false to remove Markdown from posts and/or comments.
-@define( 'MARKDOWN_WP_POSTS',      true );
-@define( 'MARKDOWN_WP_COMMENTS',   true );
-
-
-
-### Standard Function Interface ###
-
-@define( 'MARKDOWN_PARSER_CLASS',  'MarkdownExtra_Parser' );
-
-function Markdown($text) {
-#
-# Initialize the parser and return the result of its transform method.
-#
-    # Setup static parser variable.
-    static $parser;
-    if (!isset($parser)) {
-        $parser_class = MARKDOWN_PARSER_CLASS;
-        $parser = new $parser_class;
-    }
-
-    # Transform text using parser.
-    return $parser->transform($text);
-}
-
-
-### WordPress Plugin Interface ###
-
-/*
-Plugin Name: Markdown Extra
-Plugin URI: http://www.michelf.com/projects/php-markdown/
-Description: <a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>
-Version: 1.2.2
-Author: Michel Fortin
-Author URI: http://www.michelf.com/
-*/
-
-if (isset($wp_version)) {
-    # More details about how it works here:
-    # <http://www.michelf.com/weblog/2005/wordpress-text-flow-vs-markdown/>
-
-    # Post content and excerpts
-    # - Remove WordPress paragraph generator.
-    # - Run Markdown on excerpt, then remove all tags.
-    # - Add paragraph tag around the excerpt, but remove it for the excerpt rss.
-    if (MARKDOWN_WP_POSTS) {
-        remove_filter('the_content',     'wpautop');
-        remove_filter('the_content_rss', 'wpautop');
-        remove_filter('the_excerpt',     'wpautop');
-        add_filter('the_content',     'mdwp_MarkdownPost', 6);
-        add_filter('the_content_rss', 'mdwp_MarkdownPost', 6);
-        add_filter('get_the_excerpt', 'mdwp_MarkdownPost', 6);
-        add_filter('get_the_excerpt', 'trim', 7);
-        add_filter('the_excerpt',     'mdwp_add_p');
-        add_filter('the_excerpt_rss', 'mdwp_strip_p');
-
-        remove_filter('content_save_pre',  'balanceTags', 50);
-        remove_filter('excerpt_save_pre',  'balanceTags', 50);
-        add_filter('the_content',     'balanceTags', 50);
-        add_filter('get_the_excerpt', 'balanceTags', 9);
-    }
-
-    # Add a footnote id prefix to posts when inside a loop.
-    function mdwp_MarkdownPost($text) {
-        static $parser;
-        if (!$parser) {
-            $parser_class = MARKDOWN_PARSER_CLASS;
-            $parser = new $parser_class;
-        }
-        if (is_single() || is_page() || is_feed()) {
-            $parser->fn_id_prefix = "";
-        } else {
-            $parser->fn_id_prefix = get_the_ID() . ".";
-        }
-        return $parser->transform($text);
-    }
-
-    # Comments
-    # - Remove WordPress paragraph generator.
-    # - Remove WordPress auto-link generator.
-    # - Scramble important tags before passing them to the kses filter.
-    # - Run Markdown on excerpt then remove paragraph tags.
-    if (MARKDOWN_WP_COMMENTS) {
-        remove_filter('comment_text', 'wpautop', 30);
-        remove_filter('comment_text', 'make_clickable');
-        add_filter('pre_comment_content', 'Markdown', 6);
-        add_filter('pre_comment_content', 'mdwp_hide_tags', 8);
-        add_filter('pre_comment_content', 'mdwp_show_tags', 12);
-        add_filter('get_comment_text',    'Markdown', 6);
-        add_filter('get_comment_excerpt', 'Markdown', 6);
-        add_filter('get_comment_excerpt', 'mdwp_strip_p', 7);
-
-        global $mdwp_hidden_tags, $mdwp_placeholders;
-        $mdwp_hidden_tags = explode(' ',
-            '<p> </p> <pre> </pre> <ol> </ol> <ul> </ul> <li> </li>');
-        $mdwp_placeholders = explode(' ', str_rot13(
-            'pEj07ZbbBZ U1kqgh4w4p pre2zmeN6K QTi31t9pre ol0MP1jzJR '.
-            'ML5IjmbRol ulANi1NsGY J7zRLJqPul liA8ctl16T K9nhooUHli'));
-    }
-
-    function mdwp_add_p($text) {
-        if (!preg_match('{^$|^<(p|ul|ol|dl|pre|blockquote)>}i', $text)) {
-            $text = '<p>'.$text.'</p>';
-            $text = preg_replace('{\n{2,}}', "</p>\n\n<p>", $text);
-        }
-        return $text;
-    }
-
-    function mdwp_strip_p($t) { return preg_replace('{</?p>}i', '', $t); }
-
-    function mdwp_hide_tags($text) {
-        global $mdwp_hidden_tags, $mdwp_placeholders;
-        return str_replace($mdwp_hidden_tags, $mdwp_placeholders, $text);
-    }
-    function mdwp_show_tags($text) {
-        global $mdwp_hidden_tags, $mdwp_placeholders;
-        return str_replace($mdwp_placeholders, $mdwp_hidden_tags, $text);
-    }
-}
-
-
-### bBlog Plugin Info ###
-
-function identify_modifier_markdown() {
-    return array(
-        'name' => 'markdown',
-        'type' => 'modifier',
-        'nicename' => 'PHP Markdown Extra',
-        'description' => 'A text-to-HTML conversion tool for web writers',
-        'authors' => 'Michel Fortin and John Gruber',
-        'licence' => 'GPL',
-        'version' => MARKDOWNEXTRA_VERSION,
-        'help' => '<a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>',
-        );
-}
-
-
-### Smarty Modifier Interface ###
-
-function smarty_modifier_markdown($text) {
-    return Markdown($text);
-}
-
-
-### Textile Compatibility Mode ###
-
-# Rename this file to "classTextile.php" and it can replace Textile everywhere.
-
-if (strcasecmp(substr(__FILE__, -16), "classTextile.php") == 0) {
-    # Try to include PHP SmartyPants. Should be in the same directory.
-    @include_once 'smartypants.php';
-    # Fake Textile class. It calls Markdown instead.
-    class Textile {
-        function TextileThis($text, $lite='', $encode='') {
-            if ($lite == '' && $encode == '')    $text = Markdown($text);
-            if (function_exists('SmartyPants'))  $text = SmartyPants($text);
-            return $text;
-        }
-        # Fake restricted version: restrictions are not supported for now.
-        function TextileRestricted($text, $lite='', $noimage='') {
-            return $this->TextileThis($text, $lite);
-        }
-        # Workaround to ensure compatibility with TextPattern 4.0.3.
-        function blockLite($text) { return $text; }
-    }
-}
-
-
-
-#
-# Markdown Parser Class
-#
-
-class Markdown_Parser {
-
-    # Regex to match balanced [brackets].
-    # Needed to insert a maximum bracked depth while converting to PHP.
-    var $nested_brackets_depth = 6;
-    var $nested_brackets_re;
-
-    var $nested_url_parenthesis_depth = 4;
-    var $nested_url_parenthesis_re;
-
-    # Table of hash values for escaped characters:
-    var $escape_chars = '\`*_{}[]()>#+-.!';
-    var $escape_chars_re;
-
-    # Change to ">" for HTML output.
-    var $empty_element_suffix = MARKDOWN_EMPTY_ELEMENT_SUFFIX;
-    var $tab_width = MARKDOWN_TAB_WIDTH;
-
-    # Change to `true` to disallow markup or entities.
-    var $no_markup = false;
-    var $no_entities = false;
-
-    # Predefined urls and titles for reference links and images.
-    var $predef_urls = array();
-    var $predef_titles = array();
-
-
-    function Markdown_Parser() {
-    #
-    # Constructor function. Initialize appropriate member variables.
-    #
-        $this->_initDetab();
-        $this->prepareItalicsAndBold();
-
-        $this->nested_brackets_re =
-            str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth).
-            str_repeat('\])*', $this->nested_brackets_depth);
-
-        $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.
-        asort($this->document_gamut);
-        asort($this->block_gamut);
-        asort($this->span_gamut);
-    }
-
-
-    # Internal hashes used during transformation.
-    var $urls = array();
-    var $titles = array();
-    var $html_hashes = array();
-
-    # Status flag to avoid invalid nesting.
-    var $in_anchor = false;
-
-
-    function setup() {
-    #
-    # Called before the transformation process starts to setup parser
-    # states.
-    #
-        # Clear global hashes.
-        $this->urls = $this->predef_urls;
-        $this->titles = $this->predef_titles;
-        $this->html_hashes = array();
-
-        $in_anchor = false;
-    }
-
-    function teardown() {
-    #
-    # Called after the transformation process to clear any variable
-    # which may be taking up memory unnecessarly.
-    #
-        $this->urls = array();
-        $this->titles = array();
-        $this->html_hashes = array();
-    }
-
-
-    function transform($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);
-
-        # Standardize line endings:
-        #   DOS to Unix and Mac to Unix
-        $text = preg_replace('{\r\n?}', "\n", $text);
-
-        # Make sure $text ends with a couple of newlines:
-        $text .= "\n\n";
-
-        # Convert all tabs to spaces.
-        $text = $this->detab($text);
-
-        # Turn block-level HTML blocks into hash entries
-        $text = $this->hashHTMLBlocks($text);
-
-        # Strip any lines consisting only of spaces and tabs.
-        # This makes subsequent regexen easier to write, because we can
-        # match consecutive blank lines with /\n+/ instead of something
-        # contorted like /[ ]*\n+/ .
-        $text = preg_replace('/^[ ]+$/m', '', $text);
-
-        # Run document gamut methods.
-        foreach ($this->document_gamut as $method => $priority) {
-            $text = $this->$method($text);
-        }
-
-        $this->teardown();
-
-        return $text . "\n";
-    }
-
-    var $document_gamut = array(
-        # Strip link definitions, store in hashes.
-        "stripLinkDefinitions" => 20,
-
-        "runBasicBlockGamut"   => 30,
-        );
-
-
-    function stripLinkDefinitions($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
-                              [ ]*
-                            <?(\S+?)>?          # url = $2
-                              [ ]*
-                              \n?               # maybe one newline
-                              [ ]*
-                            (?:
-                                (?<=\s)         # lookbehind for whitespace
-                                ["(]
-                                (.*?)           # title = $3
-                                [")]
-                                [ ]*
-                            )?  # title is optional
-                            (?:\n+|\Z)
-            }xm',
-            array(&$this, '_stripLinkDefinitions_callback'),
-            $text);
-        return $text;
-    }
-    function _stripLinkDefinitions_callback($matches) {
-        $link_id = strtolower($matches[1]);
-        $this->urls[$link_id] = $matches[2];
-        $this->titles[$link_id] =& $matches[3];
-        return ''; # String that will replace the block
-    }
-
-
-    function hashHTMLBlocks($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,
-        # 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:
-        #
-        # *  List "a" is made of tags which can be both inline or block-level.
-        #    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
-        #    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|form|fieldset|iframe|math';
-
-        # Regular expression for the content of a block tag.
-        $nested_tags_level = 4;
-        $attr = '
-            (?>             # optional tag attributes
-              \s            # starts with whitespace
-              (?>
-                [^>"/]+     # text outside quotes
-              |
-                /+(?!>)     # slash not followed by ">"
-              |
-                "[^"]*"     # text inside double quotes (tolerate ">")
-              |
-                \'[^\']*\'  # text inside single quotes (tolerate ">")
-              )*
-            )?
-            ';
-        $content =
-            str_repeat('
-                (?>
-                  [^<]+         # content without tag
-                |
-                  <\2           # nested opening tag
-                    '.$attr.'   # attributes
-                    (?>
-                      />
-                    |
-                      >', $nested_tags_level).  # end of opening tag
-                      '.*?'.                    # 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>
-        #       <div>
-        #       tags for inner block must be indented.
-        #       </div>
-        #   </div>
-        #
-        # The outermost tags must start at the left margin for this to match, and
-        # the inner nested divs must be indented.
-        # 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\n)       # Starting after a blank line
-                |               # or
-                \A\n?           # the beginning of the doc
-            )
-            (                       # save in $1
-
-              # Match from `\n<tag>` to `</tag>\n`, handling nested tags
-              # in between.
-
-                        [ ]{0,'.$less_than_tab.'}
-                        <('.$block_tags_b_re.')# start tag = $2
-                        '.$attr.'>          # attributes followed by > and \n
-                        '.$content.'        # content, support nesting
-                        </\2>               # the matching end tag
-                        [ ]*                # trailing spaces/tabs
-                        (?=\n+|\Z)  # followed by a newline or end of document
-
-            | # Special version for tags of group a.
-
-                        [ ]{0,'.$less_than_tab.'}
-                        <('.$block_tags_a_re.')# start tag = $3
-                        '.$attr.'>[ ]*\n    # attributes followed by >
-                        '.$content2.'       # content, support nesting
-                        </\3>               # the matching end tag
-                        [ ]*                # trailing spaces/tabs
-                        (?=\n+|\Z)  # followed by a newline or end of document
-
-            | # Special case just for <hr />. It was easier to make a special
-              # case than to make the other regex more complicated.
-
-                        [ ]{0,'.$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:
-                        <([?%])         # $2
-                        .*?
-                        \2>
-                    )
-                    [ ]*
-                    (?=\n{2,}|\Z)       # followed by a blank line or end of document
-
-            )
-            )}Sxmi',
-            array(&$this, '_hashHTMLBlocks_callback'),
-            $text);
-
-        return $text;
-    }
-    function _hashHTMLBlocks_callback($matches) {
-        $text = $matches[1];
-        $key  = $this->hashBlock($text);
-        return "\n\n$key\n\n";
-    }
-
-
-    function hashPart($text, $boundary = 'X') {
-    #
-    # 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.
-    #
-        # 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.
-        static $i = 0;
-        $key = "$boundary\x1A" . ++$i . $boundary;
-        $this->html_hashes[$key] = $text;
-        return $key; # String that will replace the tag.
-    }
-
-
-    function hashBlock($text) {
-    #
-    # Shortcut function for hashPart with block-level boundaries.
-    #
-        return $this->hashPart($text, 'B');
-    }
-
-
-    var $block_gamut = array(
-    #
-    # These are all the transformations that form block-level
-    # tags like paragraphs, headers, and list items.
-    #
-        "doHeaders"         => 10,
-        "doHorizontalRules" => 20,
-
-        "doLists"           => 40,
-        "doCodeBlocks"      => 50,
-        "doBlockQuotes"     => 60,
-        );
-
-    function runBlockGamut($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);
-    }
-
-    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.
-        $text = $this->formParagraphs($text);
-
-        return $text;
-    }
-
-
-    function doHorizontalRules($text) {
-        # Do Horizontal Rules:
-        return preg_replace(
-            '{
-                ^[ ]{0,3}   # Leading space
-                ([-*_])     # $1: First marker
-                (?>         # Repeated marker group
-                    [ ]{0,2}    # Zero, one, or two spaces.
-                    \1          # Marker character
-                ){2,}       # Group repeated at least twice
-                [ ]*        # Tailing spaces
-                $           # End of line.
-            }mx',
-            "\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n",
-            $text);
-    }
-
-
-    var $span_gamut = array(
-    #
-    # These are all the transformations that occur *within* block-level
-    # tags like paragraphs, headers, and list items.
-    #
-        # Process character escapes, code spans, and inline HTML
-        # in one shot.
-        "parseSpan"           => -30,
-
-        # Process anchor and image tags. Images must come first,
-        # because ![foo][f] looks like an anchor.
-        "doImages"            =>  10,
-        "doAnchors"           =>  20,
-
-        # Make links out of things like `<http://example.com/>`
-        # Must come after doAnchors, because you can use < and >
-        # delimiters in inline links like [this](<url>).
-        "doAutoLinks"         =>  30,
-        "encodeAmpsAndAngles" =>  40,
-
-        "doItalicsAndBold"    =>  50,
-        "doHardBreaks"        =>  60,
-        );
-
-    function runSpanGamut($text) {
-    #
-    # Run span gamut tranformations.
-    #
-        foreach ($this->span_gamut as $method => $priority) {
-            $text = $this->$method($text);
-        }
-
-        return $text;
-    }
-
-
-    function doHardBreaks($text) {
-        # Do hard breaks:
-        return preg_replace_callback('/ {2,}\n/',
-            array(&$this, '_doHardBreaks_callback'), $text);
-    }
-    function _doHardBreaks_callback($matches) {
-        return $this->hashPart("<br$this->empty_element_suffix\n");
-    }
-
-
-    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
-              \[
-                ('.$this->nested_brackets_re.') # link text = $2
-              \]
-              \(            # literal paren
-                [ ]*
-                (?:
-                    <(\S*)> # href = $3
-                |
-                    ('.$this->nested_url_parenthesis_re.')  # href = $4
-                )
-                [ ]*
-                (           # $5
-                  ([\'"])   # quote char = $6
-                  (.*?)     # Title = $7
-                  \6        # matching quote
-                  [ ]*  # ignore any spaces/tabs between closing quote and )
-                )?          # title is optional
-              \)
-            )
-            }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 test][1]
-        # or [link test](/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 $text;
-    }
-    function _doAnchors_reference_callback($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 = $this->encodeAttribute($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 {
-            $result = $whole_match;
-        }
-        return $result;
-    }
-    function _doAnchors_inline_callback($matches) {
-        $whole_match    =  $matches[1];
-        $link_text      =  $this->runSpanGamut($matches[2]);
-        $url            =  $matches[3] == '' ? $matches[4] : $matches[3];
-        $title          =& $matches[7];
-
-        $url = $this->encodeAttribute($url);
-
-        $result = "<a href=\"$url\"";
-        if (isset($title)) {
-            $title = $this->encodeAttribute($title);
-            $result .=  " title=\"$title\"";
-        }
-
-        $link_text = $this->runSpanGamut($link_text);
-        $result .= ">$link_text</a>";
-
-        return $this->hashPart($result);
-    }
-
-
-    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
-              \(            # literal paren
-                [ ]*
-                (?:
-                    <(\S*)> # src url = $3
-                |
-                    ('.$this->nested_url_parenthesis_re.')  # src url = $4
-                )
-                [ ]*
-                (           # $5
-                  ([\'"])   # quote char = $6
-                  (.*?)     # title = $7
-                  \6        # matching quote
-                  [ ]*
-                )?          # title is optional
-              \)
-            )
-            }xs',
-            array(&$this, '_doImages_inline_callback'), $text);
-
-        return $text;
-    }
-    function _doImages_reference_callback($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 = $this->encodeAttribute($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\"";
-            }
-            $result .= $this->empty_element_suffix;
-            $result = $this->hashPart($result);
-        }
-        else {
-            # If there's no such link ID, leave intact:
-            $result = $whole_match;
-        }
-
-        return $result;
-    }
-    function _doImages_inline_callback($matches) {
-        $whole_match    = $matches[1];
-        $alt_text       = $matches[2];
-        $url            = $matches[3] == '' ? $matches[4] : $matches[3];
-        $title          =& $matches[7];
-
-        $alt_text = $this->encodeAttribute($alt_text);
-        $url = $this->encodeAttribute($url);
-        $result = "<img src=\"$url\" alt=\"$alt_text\"";
-        if (isset($title)) {
-            $title = $this->encodeAttribute($title);
-            $result .=  " title=\"$title\""; # $title already quoted
-        }
-        $result .= $this->empty_element_suffix;
-
-        return $this->hashPart($result);
-    }
-
-
-    function doHeaders($text) {
-        # Setext-style headers:
-        #     Header 1
-        #     ========
-        #
-        #     Header 2
-        #     --------
-        #
-        $text = preg_replace_callback('{ ^(.+?)[ ]*\n(=+|-+)[ ]*\n+ }mx',
-            array(&$this, '_doHeaders_callback_setext'), $text);
-
-        # atx-style headers:
-        #   # Header 1
-        #   ## Header 2
-        #   ## Header 2 with closing hashes ##
-        #   ...
-        #   ###### Header 6
-        #
-        $text = preg_replace_callback('{
-                ^(\#{1,6})  # $1 = string of #\'s
-                [ ]*
-                (.+?)       # $2 = Header text
-                [ ]*
-                \#*         # optional closing #\'s (not counted)
-                \n+
-            }xm',
-            array(&$this, '_doHeaders_callback_atx'), $text);
-
-        return $text;
-    }
-    function _doHeaders_callback_setext($matches) {
-        # Terrible hack to check we haven't found an empty list item.
-        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>";
-        return "\n" . $this->hashBlock($block) . "\n\n";
-    }
-    function _doHeaders_callback_atx($matches) {
-        $level = strlen($matches[1]);
-        $block = "<h$level>".$this->runSpanGamut($matches[2])."</h$level>";
-        return "\n" . $this->hashBlock($block) . "\n\n";
-    }
-
-
-    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:
-        $marker_ul_re  = '[*+-]';
-        $marker_ol_re  = '\d+[.]';
-        $marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
-
-        $markers_relist = array($marker_ul_re, $marker_ol_re);
-
-        foreach ($markers_relist as $marker_re) {
-            # Re-usable pattern to match any entirel ul or ol list:
-            $whole_list_re = '
-                (                               # $1 = whole list
-                  (                             # $2
-                    [ ]{0,'.$less_than_tab.'}
-                    ('.$marker_re.')            # $3 = first list item marker
-                    [ ]+
-                  )
-                  (?s:.+?)
-                  (                             # $4
-                      \z
-                    |
-                      \n{2,}
-                      (?=\S)
-                      (?!                       # Negative lookahead for another list item marker
-                        [ ]*
-                        '.$marker_re.'[ ]+
-                      )
-                  )
-                )
-            '; // mx
-
-            # We use a different prefix before nested lists than top-level lists.
-            # See extended comment in _ProcessListItems().
-
-            if ($this->list_level) {
-                $text = preg_replace_callback('{
-                        ^
-                        '.$whole_list_re.'
-                    }mx',
-                    array(&$this, '_doLists_callback'), $text);
-            }
-            else {
-                $text = preg_replace_callback('{
-                        (?:(?<=\n)\n|\A\n?) # Must eat the newline
-                        '.$whole_list_re.'
-                    }mx',
-                    array(&$this, '_doLists_callback'), $text);
-            }
-        }
-
-        return $text;
-    }
-    function _doLists_callback($matches) {
-        # 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)";
-
-        $list = $matches[1];
-        $list_type = preg_match("/$marker_ul_re/", $matches[3]) ? "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>");
-        return "\n". $result ."\n\n";
-    }
-
-    var $list_level = 0;
-
-    function processListItems($list_str, $marker_any_re) {
-    #
-    #   Process the contents of a single ordered or unordered list, splitting it
-    #   into individual list items.
-    #
-        # 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 decrement. If it's zero, we're not in a list anymore.
-        #
-        # We do this because when we're not inside a list, we want to treat
-        # something like this:
-        #
-        #       I recommend upgrading to version
-        #       8. Oops, now this line is treated
-        #       as a sub-list.
-        #
-        # As a single paragraph, despite the fact that the second line starts
-        # with a digit-period-space sequence.
-        #
-        # Whereas when we're inside a list (or sub-list), that line will be
-        # 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
-        # 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:
-        $list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
-
-        $list_str = preg_replace_callback('{
-            (\n)?                           # leading line = $1
-            (^[ ]*)                         # leading whitespace = $2
-            ('.$marker_any_re.'             # list marker and space = $3
-                (?:[ ]+|(?=\n)) # space only required if item is not empty
-            )
-            ((?s:.*?))                      # list item text   = $4
-            (?:(\n+(?=\n))|\n)              # tailing blank line = $5
-            (?= \n* (\z | \2 ('.$marker_any_re.') (?:[ ]+|(?=\n))))
-            }xm',
-            array(&$this, '_processListItems_callback'), $list_str);
-
-        $this->list_level--;
-        return $list_str;
-    }
-    function _processListItems_callback($matches) {
-        $item = $matches[4];
-        $leading_line =& $matches[1];
-        $leading_space =& $matches[2];
-        $marker_space = $matches[3];
-        $tailing_blank_line =& $matches[5];
-
-        if ($leading_line || $tailing_blank_line ||
-            preg_match('/\n{2,}/', $item))
-        {
-            # Replace marker with the appropriate whitespace indentation
-            $item = $leading_space . str_repeat(' ', strlen($marker_space)) . $item;
-            $item = $this->runBlockGamut($this->outdent($item)."\n");
-        }
-        else {
-            # Recursion for sub-lists:
-            $item = $this->doLists($this->outdent($item));
-            $item = preg_replace('/\n+$/', '', $item);
-            $item = $this->runSpanGamut($item);
-        }
-
-        return "<li>" . $item . "</li>\n";
-    }
-
-
-    function doCodeBlocks($text) {
-    #
-    #   Process Markdown `<pre><code>` blocks.
-    #
-        $text = preg_replace_callback('{
-                (?:\n\n|\A\n?)
-                (               # $1 = the code block -- one or more lines, starting with a space/tab
-                  (?>
-                    [ ]{'.$this->tab_width.'}  # Lines must start with a tab or a tab-width of spaces
-                    .*\n+
-                  )+
-                )
-                ((?=^[ ]{0,'.$this->tab_width.'}\S)|\Z) # Lookahead for non-space at line-start, or end of doc
-            }xm',
-            array(&$this, '_doCodeBlocks_callback'), $text);
-
-        return $text;
-    }
-    function _doCodeBlocks_callback($matches) {
-        $codeblock = $matches[1];
-
-        $codeblock = $this->outdent($codeblock);
-        $codeblock = htmlspecialchars($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";
-    }
-
-
-    function makeCodeSpan($code) {
-    #
-    # Create a code span markup for $code. Called from handleSpanToken.
-    #
-        $code = htmlspecialchars(trim($code), ENT_NOQUOTES);
-        return $this->hashPart("<code>$code</code>");
-    }
-
-
-    var $em_relist = array(
-        ''  => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?=\S)(?![.,:;]\s)',
-        '*' => '(?<=\S)(?<!\*)\*(?!\*)',
-        '_' => '(?<=\S)(?<!_)_(?!_)',
-        );
-    var $strong_relist = array(
-        ''   => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?=\S)(?![.,:;]\s)',
-        '**' => '(?<=\S)(?<!\*)\*\*(?!\*)',
-        '__' => '(?<=\S)(?<!_)__(?!_)',
-        );
-    var $em_strong_relist = array(
-        ''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?=\S)(?![.,:;]\s)',
-        '***' => '(?<=\S)(?<!\*)\*\*\*(?!\*)',
-        '___' => '(?<=\S)(?<!_)___(?!_)',
-        );
-    var $em_strong_prepared_relist;
-
-    function prepareItalicsAndBold() {
-    #
-    # Prepare regular expressions for seraching emphasis tokens in any
-    # context.
-    #
-        foreach ($this->em_relist as $em => $em_re) {
-            foreach ($this->strong_relist as $strong => $strong_re) {
-                # Construct list of allowed token expressions.
-                $token_relist = array();
-                if (isset($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.
-                $token_re = '{('. implode('|', $token_relist) .')}';
-                $this->em_strong_prepared_relist["$em$strong"] = $token_re;
-            }
-        }
-    }
-
-    function doItalicsAndBold($text) {
-        $token_stack = array('');
-        $text_stack = array('');
-        $em = '';
-        $strong = '';
-        $tree_char_em = false;
-
-        while (1) {
-            #
-            # Get prepared regular expression for seraching emphasis tokens
-            # in current context.
-            #
-            $token_re = $this->em_strong_prepared_relist["$em$strong"];
-
-            #
-            # Each loop iteration seach for the next emphasis token.
-            # 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.
-                # 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 ($tree_char_em) {
-                # Reached closing marker while inside a three-char emphasis.
-                if ($token_len == 3) {
-                    # Three-char closing marker, close em and strong.
-                    array_shift($token_stack);
-                    $span = array_shift($text_stack);
-                    $span = $this->runSpanGamut($span);
-                    $span = "<strong><em>$span</em></strong>";
-                    $text_stack[0] .= $this->hashPart($span);
-                    $em = '';
-                    $strong = '';
-                } else {
-                    # Other closing marker: close one em or strong and
-                    # 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
-                }
-                $tree_char_em = false;
-            } else if ($token_len == 3) {
-                if ($em) {
-                    # Reached closing marker for both em and strong.
-                    # Closing strong marker:
-                    for ($i = 0; $i < 2; ++$i) {
-                        $shifted_token = array_shift($token_stack);
-                        $tag = strlen($shifted_token) == 2 ? "strong" : "em";
-                        $span = array_shift($text_stack);
-                        $span = $this->runSpanGamut($span);
-                        $span = "<$tag>$span</$tag>";
-                        $text_stack[0] .= $this->hashPart($span);
-                        $$tag = ''; # $$tag stands for $em or $strong
-                    }
-                } else {
-                    # Reached opening three-char emphasis marker. Push on token
-                    # stack; will be handled by the special condition above.
-                    $em = $token{0};
-                    $strong = "$em$em";
-                    array_unshift($token_stack, $token);
-                    array_unshift($text_stack, '');
-                    $tree_char_em = true;
-                }
-            } else if ($token_len == 2) {
-                if ($strong) {
-                    # Unwind any dangling emphasis marker:
-                    if (strlen($token_stack[0]) == 1) {
-                        $text_stack[1] .= array_shift($token_stack);
-                        $text_stack[0] .= array_shift($text_stack);
-                    }
-                    # Closing strong marker:
-                    array_shift($token_stack);
-                    $span = array_shift($text_stack);
-                    $span = $this->runSpanGamut($span);
-                    $span = "<strong>$span</strong>";
-                    $text_stack[0] .= $this->hashPart($span);
-                    $strong = '';
-                } else {
-                    array_unshift($token_stack, $token);
-                    array_unshift($text_stack, '');
-                    $strong = $token;
-                }
-            } else {
-                # Here $token_len == 1
-                if ($em) {
-                    if (strlen($token_stack[0]) == 1) {
-                        # Closing emphasis marker:
-                        array_shift($token_stack);
-                        $span = array_shift($text_stack);
-                        $span = $this->runSpanGamut($span);
-                        $span = "<em>$span</em>";
-                        $text_stack[0] .= $this->hashPart($span);
-                        $em = '';
-                    } else {
-                        $text_stack[0] .= $token;
-                    }
-                } else {
-                    array_unshift($token_stack, $token);
-                    array_unshift($text_stack, '');
-                    $em = $token;
-                }
-            }
-        }
-        return $text_stack[0];
-    }
-
-
-    function doBlockQuotes($text) {
-        $text = preg_replace_callback('/
-              (                             # Wrap whole match in $1
-                (?>
-                  ^[ ]*>[ ]?            # ">" at the start of a line
-                    .+\n                    # rest of the first line
-                  (.+\n)*                   # subsequent consecutive lines
-                  \n*                       # blanks
-                )+
-              )
-            /xm',
-            array(&$this, '_doBlockQuotes_callback'), $text);
-
-        return $text;
-    }
-    function _doBlockQuotes_callback($matches) {
-        $bq = $matches[1];
-        # trim one level of quoting - trim whitespace-only lines
-        $bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq);
-        $bq = $this->runBlockGamut($bq);        # recurse
-
-        $bq = preg_replace('/^/m', "  ", $bq);
-        # These leading spaces cause problem with <pre> content,
-        # so we need to fix that:
-        $bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx',
-            array(&$this, '_DoBlockQuotes_callback2'), $bq);
-
-        return "\n". $this->hashBlock("<blockquote>\n$bq\n</blockquote>")."\n\n";
-    }
-    function _doBlockQuotes_callback2($matches) {
-        $pre = $matches[1];
-        $pre = preg_replace('/^  /m', '', $pre);
-        return $pre;
-    }
-
-
-    function formParagraphs($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 => $value) {
-            if (!preg_match('/^B\x1A[0-9]+B$/', $value)) {
-                # Is a paragraph.
-                $value = $this->runSpanGamut($value);
-                $value = preg_replace('/^([ ]*)/', "<p>", $value);
-                $value .= "</p>";
-                $grafs[$key] = $this->unhash($value);
-            }
-            else {
-                # Is a block.
-                # Modify elements of @grafs in-place...
-                $graf = $value;
-                $block = $this->html_hashes[$graf];
-                $graf = $block;
-//              if (preg_match('{
-//                  \A
-//                  (                           # $1 = <div> tag
-//                    <div  \s+
-//                    [^>]*
-//                    \b
-//                    markdown\s*=\s*  ([\'"])  #   $2 = attr quote char
-//                    1
-//                    \2
-//                    [^>]*
-//                    >
-//                  )
-//                  (                           # $3 = contents
-//                  .*
-//                  )
-//                  (</div>)                    # $4 = closing tag
-//                  \z
-//                  }xs', $block, $matches))
-//              {
-//                  list(, $div_open, , $div_content, $div_close) = $matches;
-//
-//                  # We can't call Markdown(), because that resets the hash;
-//                  # that initialization code should be pulled into its own sub, though.
-//                  $div_content = $this->hashHTMLBlocks($div_content);
-//
-//                  # Run document gamut methods on the content.
-//                  foreach ($this->document_gamut as $method => $priority) {
-//                      $div_content = $this->$method($div_content);
-//                  }
-//
-//                  $div_open = preg_replace(
-//                      '{\smarkdown\s*=\s*([\'"]).+?\1}', '', $div_open);
-//
-//                  $graf = $div_open . "\n" . $div_content . "\n" . $div_close;
-//              }
-                $grafs[$key] = $graf;
-            }
-        }
-
-        return implode("\n\n", $grafs);
-    }
-
-
-    function encodeAttribute($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 $text;
-    }
-
-
-    function encodeAmpsAndAngles($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
-            # MT plugin: <http://bumppo.net/projects/amputator/>
-            $text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/',
-                                '&amp;', $text);;
-        }
-        # Encode remaining <'s
-        $text = str_replace('<', '&lt;', $text);
-
-        return $text;
-    }
-
-
-    function doAutoLinks($text) {
-        $text = preg_replace_callback('{<((https?|ftp|dict):[^\'">\s]+)>}i',
-            array(&$this, '_doAutoLinks_url_callback'), $text);
-
-        # Email addresses: <address@domain.foo>
-        $text = preg_replace_callback('{
-            <
-            (?:mailto:)?
-            (
-                [-.\w\x80-\xFF]+
-                \@
-                [-a-z0-9\x80-\xFF]+(\.[-a-z0-9\x80-\xFF]+)*\.[a-z]+
-            )
-            >
-            }xi',
-            array(&$this, '_doAutoLinks_email_callback'), $text);
-
-        return $text;
-    }
-    function _doAutoLinks_url_callback($matches) {
-        $url = $this->encodeAttribute($matches[1]);
-        $link = "<a href=\"$url\">$url</a>";
-        return $this->hashPart($link);
-    }
-    function _doAutoLinks_email_callback($matches) {
-        $address = $matches[1];
-        $link = $this->encodeEmailAddress($address);
-        return $this->hashPart($link);
-    }
-
-
-    function encodeEmailAddress($addr) {
-    #
-    #   Input: an email address, e.g. "foo@example.com"
-    #
-    #   Output: the email address as a mailto link, with each character
-    #       of the address encoded as either a decimal or hex entity, in
-    #       the hopes of foiling most address harvesting spam bots. E.g.:
-    #
-    #     <p><a href="&#109;&#x61;&#105;&#x6c;&#116;&#x6f;&#58;&#x66;o&#111;
-    #        &#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;&#101;&#46;&#x63;&#111;
-    #        &#x6d;">&#x66;o&#111;&#x40;&#101;&#x78;&#97;&#x6d;&#112;&#x6c;
-    #        &#101;&#46;&#x63;&#111;&#x6d;</a></p>
-    #
-    #   Based by a filter by Matthew Wickline, posted to BBEdit-Talk.
-    #   With some optimizations by Milian Wolff.
-    #
-        $addr = "mailto:" . $addr;
-        $chars = preg_split('/(?<!^)(?!$)/', $addr);
-        $seed = (int)abs(crc32($addr) / strlen($addr)); # Deterministic seed.
-
-        foreach ($chars as $key => $char) {
-            $ord = ord($char);
-            # Ignore non-ascii chars.
-            if ($ord < 128) {
-                $r = ($seed * (1 + $key)) % 100; # Pseudo-random function.
-                # roughly 10% raw, 45% hex, 45% dec
-                # '@' *must* be encoded. I insist.
-                if ($r > 90 && $char != '@') /* do nothing */;
-                else if ($r < 45) $chars[$key] = '&#x'.dechex($ord).';';
-                else              $chars[$key] = '&#'.$ord.';';
-            }
-        }
-
-        $addr = implode('', $chars);
-        $text = implode('', array_slice($chars, 7)); # text without `mailto:`
-        $addr = "<a href=\"$addr\">$text</a>";
-
-        return $addr;
-    }
-
-
-    function parseSpan($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.'
-                |
-                    (?<![`\\\\])
-                    `+                      # code span marker
-            '.( $this->no_markup ? '' : '
-                |
-                    <!--    .*?     -->     # comment
-                |
-                    <\?.*?\?> | <%.*?%>     # processing instruction
-                |
-                    <[/!$]?[-a-zA-Z0-9:]+   # regular tags
-                    (?>
-                        \s
-                        (?>[^"\'>]+|"[^"]*"|\'[^\']*\')*
-                    )?
-                    >
-            ').'
-                )
-                }xs';
-
-        while (1) {
-            #
-            # Each loop iteration seach for either the next tag, the next
-            # openning code span marker, or the next escaped character.
-            # Each token is then passed to handleSpanToken.
-            #
-            $parts = preg_split($span_re, $str, 2, PREG_SPLIT_DELIM_CAPTURE);
-
-            # Create token from text preceding tag.
-            if ($parts[0] != "") {
-                $output .= $parts[0];
-            }
-
-            # Check if we reach the end.
-            if (isset($parts[1])) {
-                $output .= $this->handleSpanToken($parts[1], $parts[2]);
-                $str = $parts[2];
-            }
-            else {
-                break;
-            }
-        }
-
-        return $output;
-    }
-
-
-    function handleSpanToken($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.
-                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.
-            default:
-                return $this->hashPart($token);
-        }
-    }
-
-
-    function outdent($text) {
-    #
-    # Remove one level of line-leading tabs or spaces
-    #
-        return preg_replace('/^(\t|[ ]{1,'.$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.
-    var $utf8_strlen = 'mb_strlen';
-
-    function detab($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 $text;
-    }
-    function _detab_callback($matches) {
-        $line = $matches[0];
-        $strlen = $this->utf8_strlen; # strlen function for UTF-8.
-
-        # Split in blocks.
-        $blocks = explode("\t", $line);
-        # Add each blocks to the line.
-        $line = $blocks[0];
-        unset($blocks[0]); # Do not add first block twice.
-        foreach ($blocks as $block) {
-            # Calculate amount of space, insert spaces, insert block.
-            $amount = $this->tab_width -
-                $strlen($line, 'UTF-8') % $this->tab_width;
-            $line .= str_repeat(" ", $amount) . $block;
-        }
-        return $line;
-    }
-    function _initDetab() {
-    #
-    # Check for the availability of the function in the `utf8_strlen` property
-    # (initially `mb_strlen`). If the function is not available, create a
-    # function that will loosely count the number of UTF-8 characters with a
-    # regular expression.
-    #
-        if (function_exists($this->utf8_strlen)) return;
-        $this->utf8_strlen = create_function('$text', 'return preg_match_all(
-            "/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/",
-            $text, $m);');
-    }
-
-
-    function unhash($text) {
-    #
-    # Swap back in all the tags hashed by _HashHTMLBlocks.
-    #
-        return preg_replace_callback('/(.)\x1A[0-9]+\1/',
-            array(&$this, '_unhash_callback'), $text);
-    }
-    function _unhash_callback($matches) {
-        return $this->html_hashes[$matches[0]];
-    }
-
-}
-
-
-#
-# Markdown Extra Parser Class
-#
-
-class MarkdownExtra_Parser extends Markdown_Parser {
-
-    # Prefix for footnote ids.
-    var $fn_id_prefix = "";
-
-    # Optional title attribute for footnote links and backlinks.
-    var $fn_link_title = MARKDOWN_FN_LINK_TITLE;
-    var $fn_backlink_title = MARKDOWN_FN_BACKLINK_TITLE;
-
-    # Optional class attribute for footnote links and backlinks.
-    var $fn_link_class = MARKDOWN_FN_LINK_CLASS;
-    var $fn_backlink_class = MARKDOWN_FN_BACKLINK_CLASS;
-
-    # Predefined abbreviations.
-    var $predef_abbr = array();
-
-
-    function MarkdownExtra_Parser() {
-    #
-    # 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::Markdown_Parser();
-    }
-
-
-    # Extra variables used during extra transformations.
-    var $footnotes = array();
-    var $footnotes_ordered = array();
-    var $abbr_desciptions = array();
-    var $abbr_word_re = '';
-
-    # Give the current footnote number.
-    var $footnote_counter = 1;
-
-
-    function setup() {
-    #
-    # Setting up Extra-specific variables.
-    #
-        parent::setup();
-
-        $this->footnotes = array();
-        $this->footnotes_ordered = 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);
-        }
-    }
-
-    function teardown() {
-    #
-    # Clearing Extra-specific variables.
-    #
-        $this->footnotes = array();
-        $this->footnotes_ordered = array();
-        $this->abbr_desciptions = array();
-        $this->abbr_word_re = '';
-
-        parent::teardown();
-    }
-
-
-    ### HTML Block Parser ###
-
-    # Tags that are always treated as block tags:
-    var $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend';
-
-    # Tags treated as block tags only if the opening tag is alone on it's line:
-    var $context_block_tags_re = 'script|noscript|math|ins|del';
-
-    # Tags where markdown="1" default to span mode:
-    var $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 $clean_tags_re = 'script|math';
-
-    # Tags that do not need to be closed.
-    var $auto_close_tags_re = 'hr|img';
-
-
-    function hashHTMLBlocks($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 whitin 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!
-    #
-        #
-        # Call the HTML-in-Markdown hasher.
-        #
-        list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
-
-        return $text;
-    }
-    function _hashHTMLBlocks_inMarkdown($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 =
-            '{
-                (                   # $2: Capture hole tag.
-                    </?                 # Any opening or closing tag.
-                        (?>             # Tag name.
-                            '.$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
-                |
-                    # Code span marker
-                    `+
-                '. ( !$span ? ' # If not in span.
-                |
-                    # Indented code block
-                    (?> ^[ ]*\n? | \n[ ]*\n )
-                    [ ]{'.($indent+4).'}[^\n]* \n
-                    (?>
-                        (?: [ ]{'.($indent+4).'}[^\n]* | [ ]* ) \n
-                    )*
-                |
-                    # Fenced code block marker
-                    (?> ^ | \n )
-                    [ ]{'.($indent).'}~~~+[ ]*\n
-                ' : '' ). ' # End (if not is span).
-                )
-            }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: Code span marker
-            #
-            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 .= $tag;
-                }
-            }
-            #
-            # Check for: Indented code block or fenced code block marker.
-            #
-            else if ($tag{0} == "\n" || $tag{0} == "~") {
-                if ($tag{1} == "\n" || $tag{1} == " ") {
-                    # Indented code block: pass it unchanged, will be handled
-                    # later.
-                    $parsed .= $tag;
-                }
-                else {
-                    # Fenced code block marker: find matching end marker.
-                    $tag_re = preg_quote(trim($tag));
-                    if (preg_match('{^(?>.*\n)+?'.$tag_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 .= $tag;
-                    }
-                }
-            }
-            #
-            # Check for: Opening Block level tag or
-            #            Opening Context Block tag (like ins and del)
-            #               used as a block tag (tag is alone on it's line).
-            #
-            else if (preg_match('{^<(?:'.$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, $text);
-    }
-    function _hashHTMLBlocks_inHTML($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 = '{
-                (                   # $2: Capture hole tag.
-                    </?                 # Any opening or closing tag.
-                        [\w:$]+         # 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 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, $text);
-    }
-
-
-    function hashClean($text) {
-    #
-    # Called whenever a tag must be hashed when a function insert a "clean" tag
-    # in $text, it pass through this function and is automaticaly escaped,
-    # blocking invalid nested overlap.
-    #
-        return $this->hashPart($text, 'C');
-    }
-
-
-    function doHeaders($text) {
-    #
-    # Redefined to add id attribute support.
-    #
-        # Setext-style headers:
-        #     Header 1  {#header1}
-        #     ========
-        #
-        #     Header 2  {#header2}
-        #     --------
-        #
-        $text = preg_replace_callback(
-            '{
-                (^.+?)                              # $1: Header text
-                (?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})?    # $2: Id attribute
-                [ ]*\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}
-        #   ...
-        #   ###### Header 6   {#header2}
-        #
-        $text = preg_replace_callback('{
-                ^(\#{1,6})  # $1 = string of #\'s
-                [ ]*
-                (.+?)       # $2 = Header text
-                [ ]*
-                \#*         # optional closing #\'s (not counted)
-                (?:[ ]+\{\#([-_:a-zA-Z0-9]+)\})? # id attribute
-                [ ]*
-                \n+
-            }xm',
-            array(&$this, '_doHeaders_callback_atx'), $text);
-
-        return $text;
-    }
-    function _doHeaders_attr($attr) {
-        if (empty($attr))  return "";
-        return " id=\"$attr\"";
-    }
-    function _doHeaders_callback_setext($matches) {
-        if ($matches[3] == '-' && preg_match('{^- }', $matches[1]))
-            return $matches[0];
-        $level = $matches[3]{0} == '=' ? 1 : 2;
-        $attr  = $this->_doHeaders_attr($id =& $matches[2]);
-        $block = "<h$level$attr>".$this->runSpanGamut($matches[1])."</h$level>";
-        return "\n" . $this->hashBlock($block) . "\n\n";
-    }
-    function _doHeaders_callback_atx($matches) {
-        $level = strlen($matches[1]);
-        $attr  = $this->_doHeaders_attr($id =& $matches[3]);
-        $block = "<h$level$attr>".$this->runSpanGamut($matches[2])."</h$level>";
-        return "\n" . $this->hashBlock($block) . "\n\n";
-    }
-
-
-    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 $text;
-    }
-    function _doTable_leadingPipe_callback($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, $content));
-    }
-    function _doTable_callback($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] = ' align="right"';
-            else if (preg_match('/^ *:-+: *$/', $s))$attr[$n] = ' align="center"';
-            else if (preg_match('/^ *:-+ *$/', $s)) $attr[$n] = ' align="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);
-
-        # 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";
-    }
-
-
-    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 $text;
-    }
-    function _doDefLists_callback($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";
-    }
-
-
-    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 $list_str;
-    }
-    function _processDefListItems_callback_dt($matches) {
-        $terms = explode("\n", trim($matches[1]));
-        $text = '';
-        foreach ($terms as $term) {
-            $term = $this->runSpanGamut(trim($term));
-            $text .= "\n<dt>" . $term . "</dt>";
-        }
-        return $text . "\n";
-    }
-    function _processDefListItems_callback_dd($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>" . $def . "</dd>\n";
-    }
-
-
-    function doFencedCodeBlocks($text) {
-    #
-    # Adding the fenced code block syntax to regular Markdown:
-    #
-    # ~~~
-    # Code block
-    # ~~~
-    #
-        $less_than_tab = $this->tab_width;
-
-        $text = preg_replace_callback('{
-                (?:\n|\A)
-                # 1: Opening marker
-                (
-                    ~{3,} # Marker: three tilde or more.
-                )
-                [ ]* \n # Whitespace and newline following marker.
-
-                # 2: Content
-                (
-                    (?>
-                        (?!\1 [ ]* \n)  # Not a closing marker.
-                        .*\n+
-                    )+
-                )
-
-                # Closing marker.
-                \1 [ ]* \n
-            }xm',
-            array(&$this, '_doFencedCodeBlocks_callback'), $text);
-
-        return $text;
-    }
-    function _doFencedCodeBlocks_callback($matches) {
-        $codeblock = $matches[2];
-        $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
-        $codeblock = preg_replace_callback('/^\n+/',
-            array(&$this, '_doFencedCodeBlocks_newlines'), $codeblock);
-        $codeblock = "<pre><code>$codeblock</code></pre>";
-        return "\n\n".$this->hashBlock($codeblock)."\n\n";
-    }
-    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 $em_relist = array(
-        ''  => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?=\S)(?![.,:;]\s)',
-        '*' => '(?<=\S)(?<!\*)\*(?!\*)',
-        '_' => '(?<=\S)(?<!_)_(?![a-zA-Z0-9_])',
-        );
-    var $strong_relist = array(
-        ''   => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?=\S)(?![.,:;]\s)',
-        '**' => '(?<=\S)(?<!\*)\*\*(?!\*)',
-        '__' => '(?<=\S)(?<!_)__(?![a-zA-Z0-9_])',
-        );
-    var $em_strong_relist = array(
-        ''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?=\S)(?![.,:;]\s)',
-        '***' => '(?<=\S)(?<!\*)\*\*\*(?!\*)',
-        '___' => '(?<=\S)(?<!_)___(?![a-zA-Z0-9_])',
-        );
-
-
-    function formParagraphs($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 $text;
-    }
-
-
-    ### Footnotes
-
-    function stripFootnotes($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 marker.
-                    (?!\n+[ ]{0,3}\S)# ensure line is not blank and followed
-                                    # by non-indented content
-                )*
-            )
-            }xm',
-            array(&$this, '_stripFootnotes_callback'),
-            $text);
-        return $text;
-    }
-    function _stripFootnotes_callback($matches) {
-        $note_id = $this->fn_id_prefix . $matches[1];
-        $this->footnotes[$note_id] = $this->outdent($matches[2]);
-        return ''; # String that will replace the block
-    }
-
-
-    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 $text;
-    }
-
-
-    function appendFootnotes($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". MARKDOWN_EMPTY_ELEMENT_SUFFIX ."\n";
-            $text .= "<ol>\n\n";
-
-            $attr = " rev=\"footnote\"";
-            if ($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]);
-
-                $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);
-
-                # Add backlink to last paragraph; create new paragraph if needed.
-                $backlink = "<a href=\"#fnref:$note_id\"$attr>&#8617;</a>";
-                if (preg_match('{</p>$}', $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 $text;
-    }
-    function _appendFootnotes_callback($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])) {
-            # Transfert footnote content to the ordered list.
-            $this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
-            unset($this->footnotes[$node_id]);
-
-            $num = $this->footnote_counter++;
-            $attr = " rel=\"footnote\"";
-            if ($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:$node_id\">".
-                "<a href=\"#fn:$node_id\"$attr>$num</a>".
-                "</sup>";
-        }
-
-        return "[^".$matches[1]."]";
-    }
-
-
-    ### Abbreviations ###
-
-    function stripAbbreviations($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 $text;
-    }
-    function _stripAbbreviations_callback($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($abbr_desc);
-        return ''; # String that will replace the block
-    }
-
-
-    function doAbbreviations($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 $text;
-    }
-    function _doAbbreviations_callback($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];
-        }
-    }
-
-}
-
-
-/*
-
-PHP Markdown Extra
-==================
-
-Description
------------
-
-This is a PHP port of the original Markdown formatter written in Perl
-by John Gruber. This special "Extra" version of PHP Markdown features
-further enhancements to the syntax for making additional constructs
-such as tables and definition list.
-
-Markdown is a text-to-HTML filter; it translates an easy-to-read /
-easy-to-write structured text format into HTML. Markdown's text format
-is most similar to that of plain text email, and supports features such
-as headers, *emphasis*, code blocks, blockquotes, and links.
-
-Markdown's syntax is designed not as a generic markup language, but
-specifically to serve as a front-end to (X)HTML. You can use span-level
-HTML tags anywhere in a Markdown document, and you can use block level
-HTML tags (like <div> and <table> as well).
-
-For more information about Markdown's syntax, see:
-
-<http://daringfireball.net/projects/markdown/>
-
-
-Bugs
-----
-
-To file bug reports please send email to:
-
-<michel.fortin@michelf.com>
-
-Please include with your report: (1) the example input; (2) the output you
-expected; (3) the output Markdown actually produced.
-
-
-Version History
----------------
-
-See the readme file for detailed release notes for this version.
-
-
-Copyright and License
----------------------
-
-PHP Markdown & Extra
-Copyright (c) 2004-2008 Michel Fortin
-<http://www.michelf.com/>
-All rights reserved.
-
-Based on Markdown
-Copyright (c) 2003-2006 John Gruber
-<http://daringfireball.net/>
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-*   Redistributions of source code must retain the above copyright notice,
-    this list of conditions and the following disclaimer.
-
-*   Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the distribution.
-
-*   Neither the name "Markdown" nor the names of its contributors may
-    be used to endorse or promote products derived from this software
-    without specific prior written permission.
-
-This software is provided by the copyright holders and contributors "as
-is" and any express or implied warranties, including, but not limited
-to, the implied warranties of merchantability and fitness for a
-particular purpose are disclaimed. In no event shall the copyright owner
-or contributors be liable for any direct, indirect, incidental, special,
-exemplary, or consequential damages (including, but not limited to,
-procurement of substitute goods or services; loss of use, data, or
-profits; or business interruption) however caused and on any theory of
-liability, whether in contract, strict liability, or tort (including
-negligence or otherwise) arising in any way out of the use of this
-software, even if advised of the possibility of such damage.
-
-*/
-?>