Initial commit

.gitignore

@@ -0,0 +1 @@
+ppubs

.htaccess

@@ -0,0 +1,2 @@
+RewriteEngine on
+RewriteRule ^([A-Za-z]+)/([A-Za-z]+)/(.*)?$  index.php?ppub=$1&asset=$2    [L,QSA]

404.php

@@ -0,0 +1 @@
+<h1>404 Not Found</h1>

Parsedown.php

@@ -0,0 +1,1994 @@
+<?php
+
+#
+#
+# Parsedown
+# http://parsedown.org
+#
+# (c) Emanuil Rusev
+# http://erusev.com
+#
+# For the full license information, view the LICENSE file that was distributed
+# with this source code.
+#
+#
+
+class Parsedown
+{
+    # ~
+
+    const version = '1.8.0-beta-7';
+
+    # ~
+
+    function text($text)
+    {
+        $Elements = $this->textElements($text);
+
+        # convert to markup
+        $markup = $this->elements($Elements);
+
+        # trim line breaks
+        $markup = trim($markup, "\n");
+
+        return $markup;
+    }
+
+    protected function textElements($text)
+    {
+        # make sure no definitions are set
+        $this->DefinitionData = array();
+
+        # standardize line breaks
+        $text = str_replace(array("\r\n", "\r"), "\n", $text);
+
+        # remove surrounding line breaks
+        $text = trim($text, "\n");
+
+        # split text into lines
+        $lines = explode("\n", $text);
+
+        # iterate through lines to identify blocks
+        return $this->linesElements($lines);
+    }
+
+    #
+    # Setters
+    #
+
+    function setBreaksEnabled($breaksEnabled)
+    {
+        $this->breaksEnabled = $breaksEnabled;
+
+        return $this;
+    }
+
+    protected $breaksEnabled;
+
+    function setMarkupEscaped($markupEscaped)
+    {
+        $this->markupEscaped = $markupEscaped;
+
+        return $this;
+    }
+
+    protected $markupEscaped;
+
+    function setUrlsLinked($urlsLinked)
+    {
+        $this->urlsLinked = $urlsLinked;
+
+        return $this;
+    }
+
+    protected $urlsLinked = true;
+
+    function setSafeMode($safeMode)
+    {
+        $this->safeMode = (bool) $safeMode;
+
+        return $this;
+    }
+
+    protected $safeMode;
+
+    function setStrictMode($strictMode)
+    {
+        $this->strictMode = (bool) $strictMode;
+
+        return $this;
+    }
+
+    protected $strictMode;
+
+    protected $safeLinksWhitelist = array(
+        'http://',
+        'https://',
+        'ftp://',
+        'ftps://',
+        'mailto:',
+        'tel:',
+        'data:image/png;base64,',
+        'data:image/gif;base64,',
+        'data:image/jpeg;base64,',
+        'irc:',
+        'ircs:',
+        'git:',
+        'ssh:',
+        'news:',
+        'steam:',
+    );
+
+    #
+    # Lines
+    #
+
+    protected $BlockTypes = array(
+        '#' => array('Header'),
+        '*' => array('Rule', 'List'),
+        '+' => array('List'),
+        '-' => array('SetextHeader', 'Table', 'Rule', 'List'),
+        '0' => array('List'),
+        '1' => array('List'),
+        '2' => array('List'),
+        '3' => array('List'),
+        '4' => array('List'),
+        '5' => array('List'),
+        '6' => array('List'),
+        '7' => array('List'),
+        '8' => array('List'),
+        '9' => array('List'),
+        ':' => array('Table'),
+        '<' => array('Comment', 'Markup'),
+        '=' => array('SetextHeader'),
+        '>' => array('Quote'),
+        '[' => array('Reference'),
+        '_' => array('Rule'),
+        '`' => array('FencedCode'),
+        '|' => array('Table'),
+        '~' => array('FencedCode'),
+    );
+
+    # ~
+
+    protected $unmarkedBlockTypes = array(
+        'Code',
+    );
+
+    #
+    # Blocks
+    #
+
+    protected function lines(array $lines)
+    {
+        return $this->elements($this->linesElements($lines));
+    }
+
+    protected function linesElements(array $lines)
+    {
+        $Elements = array();
+        $CurrentBlock = null;
+
+        foreach ($lines as $line)
+        {
+            if (chop($line) === '')
+            {
+                if (isset($CurrentBlock))
+                {
+                    $CurrentBlock['interrupted'] = (isset($CurrentBlock['interrupted'])
+                        ? $CurrentBlock['interrupted'] + 1 : 1
+                    );
+                }
+
+                continue;
+            }
+
+            while (($beforeTab = strstr($line, "\t", true)) !== false)
+            {
+                $shortage = 4 - mb_strlen($beforeTab, 'utf-8') % 4;
+
+                $line = $beforeTab
+                    . str_repeat(' ', $shortage)
+                    . substr($line, strlen($beforeTab) + 1)
+                ;
+            }
+
+            $indent = strspn($line, ' ');
+
+            $text = $indent > 0 ? substr($line, $indent) : $line;
+
+            # ~
+
+            $Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
+
+            # ~
+
+            if (isset($CurrentBlock['continuable']))
+            {
+                $methodName = 'block' . $CurrentBlock['type'] . 'Continue';
+                $Block = $this->$methodName($Line, $CurrentBlock);
+
+                if (isset($Block))
+                {
+                    $CurrentBlock = $Block;
+
+                    continue;
+                }
+                else
+                {
+                    if ($this->isBlockCompletable($CurrentBlock['type']))
+                    {
+                        $methodName = 'block' . $CurrentBlock['type'] . 'Complete';
+                        $CurrentBlock = $this->$methodName($CurrentBlock);
+                    }
+                }
+            }
+
+            # ~
+
+            $marker = $text[0];
+
+            # ~
+
+            $blockTypes = $this->unmarkedBlockTypes;
+
+            if (isset($this->BlockTypes[$marker]))
+            {
+                foreach ($this->BlockTypes[$marker] as $blockType)
+                {
+                    $blockTypes []= $blockType;
+                }
+            }
+
+            #
+            # ~
+
+            foreach ($blockTypes as $blockType)
+            {
+                $Block = $this->{"block$blockType"}($Line, $CurrentBlock);
+
+                if (isset($Block))
+                {
+                    $Block['type'] = $blockType;
+
+                    if ( ! isset($Block['identified']))
+                    {
+                        if (isset($CurrentBlock))
+                        {
+                            $Elements[] = $this->extractElement($CurrentBlock);
+                        }
+
+                        $Block['identified'] = true;
+                    }
+
+                    if ($this->isBlockContinuable($blockType))
+                    {
+                        $Block['continuable'] = true;
+                    }
+
+                    $CurrentBlock = $Block;
+
+                    continue 2;
+                }
+            }
+
+            # ~
+
+            if (isset($CurrentBlock) and $CurrentBlock['type'] === 'Paragraph')
+            {
+                $Block = $this->paragraphContinue($Line, $CurrentBlock);
+            }
+
+            if (isset($Block))
+            {
+                $CurrentBlock = $Block;
+            }
+            else
+            {
+                if (isset($CurrentBlock))
+                {
+                    $Elements[] = $this->extractElement($CurrentBlock);
+                }
+
+                $CurrentBlock = $this->paragraph($Line);
+
+                $CurrentBlock['identified'] = true;
+            }
+        }
+
+        # ~
+
+        if (isset($CurrentBlock['continuable']) and $this->isBlockCompletable($CurrentBlock['type']))
+        {
+            $methodName = 'block' . $CurrentBlock['type'] . 'Complete';
+            $CurrentBlock = $this->$methodName($CurrentBlock);
+        }
+
+        # ~
+
+        if (isset($CurrentBlock))
+        {
+            $Elements[] = $this->extractElement($CurrentBlock);
+        }
+
+        # ~
+
+        return $Elements;
+    }
+
+    protected function extractElement(array $Component)
+    {
+        if ( ! isset($Component['element']))
+        {
+            if (isset($Component['markup']))
+            {
+                $Component['element'] = array('rawHtml' => $Component['markup']);
+            }
+            elseif (isset($Component['hidden']))
+            {
+                $Component['element'] = array();
+            }
+        }
+
+        return $Component['element'];
+    }
+
+    protected function isBlockContinuable($Type)
+    {
+        return method_exists($this, 'block' . $Type . 'Continue');
+    }
+
+    protected function isBlockCompletable($Type)
+    {
+        return method_exists($this, 'block' . $Type . 'Complete');
+    }
+
+    #
+    # Code
+
+    protected function blockCode($Line, $Block = null)
+    {
+        if (isset($Block) and $Block['type'] === 'Paragraph' and ! isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if ($Line['indent'] >= 4)
+        {
+            $text = substr($Line['body'], 4);
+
+            $Block = array(
+                'element' => array(
+                    'name' => 'pre',
+                    'element' => array(
+                        'name' => 'code',
+                        'text' => $text,
+                    ),
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockCodeContinue($Line, $Block)
+    {
+        if ($Line['indent'] >= 4)
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['element']['element']['text'] .= str_repeat("\n", $Block['interrupted']);
+
+                unset($Block['interrupted']);
+            }
+
+            $Block['element']['element']['text'] .= "\n";
+
+            $text = substr($Line['body'], 4);
+
+            $Block['element']['element']['text'] .= $text;
+
+            return $Block;
+        }
+    }
+
+    protected function blockCodeComplete($Block)
+    {
+        return $Block;
+    }
+
+    #
+    # Comment
+
+    protected function blockComment($Line)
+    {
+        if ($this->markupEscaped or $this->safeMode)
+        {
+            return;
+        }
+
+        if (strpos($Line['text'], '<!--') === 0)
+        {
+            $Block = array(
+                'element' => array(
+                    'rawHtml' => $Line['body'],
+                    'autobreak' => true,
+                ),
+            );
+
+            if (strpos($Line['text'], '-->') !== false)
+            {
+                $Block['closed'] = true;
+            }
+
+            return $Block;
+        }
+    }
+
+    protected function blockCommentContinue($Line, array $Block)
+    {
+        if (isset($Block['closed']))
+        {
+            return;
+        }
+
+        $Block['element']['rawHtml'] .= "\n" . $Line['body'];
+
+        if (strpos($Line['text'], '-->') !== false)
+        {
+            $Block['closed'] = true;
+        }
+
+        return $Block;
+    }
+
+    #
+    # Fenced Code
+
+    protected function blockFencedCode($Line)
+    {
+        $marker = $Line['text'][0];
+
+        $openerLength = strspn($Line['text'], $marker);
+
+        if ($openerLength < 3)
+        {
+            return;
+        }
+
+        $infostring = trim(substr($Line['text'], $openerLength), "\t ");
+
+        if (strpos($infostring, '`') !== false)
+        {
+            return;
+        }
+
+        $Element = array(
+            'name' => 'code',
+            'text' => '',
+        );
+
+        if ($infostring !== '')
+        {
+            /**
+             * https://www.w3.org/TR/2011/WD-html5-20110525/elements.html#classes
+             * Every HTML element may have a class attribute specified.
+             * The attribute, if specified, must have a value that is a set
+             * of space-separated tokens representing the various classes
+             * that the element belongs to.
+             * [...]
+             * The space characters, for the purposes of this specification,
+             * are U+0020 SPACE, U+0009 CHARACTER TABULATION (tab),
+             * U+000A LINE FEED (LF), U+000C FORM FEED (FF), and
+             * U+000D CARRIAGE RETURN (CR).
+             */
+            $language = substr($infostring, 0, strcspn($infostring, " \t\n\f\r"));
+
+            $Element['attributes'] = array('class' => "language-$language");
+        }
+
+        $Block = array(
+            'char' => $marker,
+            'openerLength' => $openerLength,
+            'element' => array(
+                'name' => 'pre',
+                'element' => $Element,
+            ),
+        );
+
+        return $Block;
+    }
+
+    protected function blockFencedCodeContinue($Line, $Block)
+    {
+        if (isset($Block['complete']))
+        {
+            return;
+        }
+
+        if (isset($Block['interrupted']))
+        {
+            $Block['element']['element']['text'] .= str_repeat("\n", $Block['interrupted']);
+
+            unset($Block['interrupted']);
+        }
+
+        if (($len = strspn($Line['text'], $Block['char'])) >= $Block['openerLength']
+            and chop(substr($Line['text'], $len), ' ') === ''
+        ) {
+            $Block['element']['element']['text'] = substr($Block['element']['element']['text'], 1);
+
+            $Block['complete'] = true;
+
+            return $Block;
+        }
+
+        $Block['element']['element']['text'] .= "\n" . $Line['body'];
+
+        return $Block;
+    }
+
+    protected function blockFencedCodeComplete($Block)
+    {
+        return $Block;
+    }
+
+    #
+    # Header
+
+    protected function blockHeader($Line)
+    {
+        $level = strspn($Line['text'], '#');
+
+        if ($level > 6)
+        {
+            return;
+        }
+
+        $text = trim($Line['text'], '#');
+
+        if ($this->strictMode and isset($text[0]) and $text[0] !== ' ')
+        {
+            return;
+        }
+
+        $text = trim($text, ' ');
+
+        $Block = array(
+            'element' => array(
+                'name' => 'h' . ($level),
+                'handler' => array(
+                    'function' => 'lineElements',
+                    'argument' => $text,
+                    'destination' => 'elements',
+                )
+            ),
+        );
+
+        return $Block;
+    }
+
+    #
+    # List
+
+    protected function blockList($Line, array $CurrentBlock = null)
+    {
+        list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]{1,9}+[.\)]');
+
+        if (preg_match('/^('.$pattern.'([ ]++|$))(.*+)/', $Line['text'], $matches))
+        {
+            $contentIndent = strlen($matches[2]);
+
+            if ($contentIndent >= 5)
+            {
+                $contentIndent -= 1;
+                $matches[1] = substr($matches[1], 0, -$contentIndent);
+                $matches[3] = str_repeat(' ', $contentIndent) . $matches[3];
+            }
+            elseif ($contentIndent === 0)
+            {
+                $matches[1] .= ' ';
+            }
+
+            $markerWithoutWhitespace = strstr($matches[1], ' ', true);
+
+            $Block = array(
+                'indent' => $Line['indent'],
+                'pattern' => $pattern,
+                'data' => array(
+                    'type' => $name,
+                    'marker' => $matches[1],
+                    'markerType' => ($name === 'ul' ? $markerWithoutWhitespace : substr($markerWithoutWhitespace, -1)),
+                ),
+                'element' => array(
+                    'name' => $name,
+                    'elements' => array(),
+                ),
+            );
+            $Block['data']['markerTypeRegex'] = preg_quote($Block['data']['markerType'], '/');
+
+            if ($name === 'ol')
+            {
+                $listStart = ltrim(strstr($matches[1], $Block['data']['markerType'], true), '0') ?: '0';
+
+                if ($listStart !== '1')
+                {
+                    if (
+                        isset($CurrentBlock)
+                        and $CurrentBlock['type'] === 'Paragraph'
+                        and ! isset($CurrentBlock['interrupted'])
+                    ) {
+                        return;
+                    }
+
+                    $Block['element']['attributes'] = array('start' => $listStart);
+                }
+            }
+
+            $Block['li'] = array(
+                'name' => 'li',
+                'handler' => array(
+                    'function' => 'li',
+                    'argument' => !empty($matches[3]) ? array($matches[3]) : array(),
+                    'destination' => 'elements'
+                )
+            );
+
+            $Block['element']['elements'] []= & $Block['li'];
+
+            return $Block;
+        }
+    }
+
+    protected function blockListContinue($Line, array $Block)
+    {
+        if (isset($Block['interrupted']) and empty($Block['li']['handler']['argument']))
+        {
+            return null;
+        }
+
+        $requiredIndent = ($Block['indent'] + strlen($Block['data']['marker']));
+
+        if ($Line['indent'] < $requiredIndent
+            and (
+                (
+                    $Block['data']['type'] === 'ol'
+                    and preg_match('/^[0-9]++'.$Block['data']['markerTypeRegex'].'(?:[ ]++(.*)|$)/', $Line['text'], $matches)
+                ) or (
+                    $Block['data']['type'] === 'ul'
+                    and preg_match('/^'.$Block['data']['markerTypeRegex'].'(?:[ ]++(.*)|$)/', $Line['text'], $matches)
+                )
+            )
+        ) {
+            if (isset($Block['interrupted']))
+            {
+                $Block['li']['handler']['argument'] []= '';
+
+                $Block['loose'] = true;
+
+                unset($Block['interrupted']);
+            }
+
+            unset($Block['li']);
+
+            $text = isset($matches[1]) ? $matches[1] : '';
+
+            $Block['indent'] = $Line['indent'];
+
+            $Block['li'] = array(
+                'name' => 'li',
+                'handler' => array(
+                    'function' => 'li',
+                    'argument' => array($text),
+                    'destination' => 'elements'
+                )
+            );
+
+            $Block['element']['elements'] []= & $Block['li'];
+
+            return $Block;
+        }
+        elseif ($Line['indent'] < $requiredIndent and $this->blockList($Line))
+        {
+            return null;
+        }
+
+        if ($Line['text'][0] === '[' and $this->blockReference($Line))
+        {
+            return $Block;
+        }
+
+        if ($Line['indent'] >= $requiredIndent)
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['li']['handler']['argument'] []= '';
+
+                $Block['loose'] = true;
+
+                unset($Block['interrupted']);
+            }
+
+            $text = substr($Line['body'], $requiredIndent);
+
+            $Block['li']['handler']['argument'] []= $text;
+
+            return $Block;
+        }
+
+        if ( ! isset($Block['interrupted']))
+        {
+            $text = preg_replace('/^[ ]{0,'.$requiredIndent.'}+/', '', $Line['body']);
+
+            $Block['li']['handler']['argument'] []= $text;
+
+            return $Block;
+        }
+    }
+
+    protected function blockListComplete(array $Block)
+    {
+        if (isset($Block['loose']))
+        {
+            foreach ($Block['element']['elements'] as &$li)
+            {
+                if (end($li['handler']['argument']) !== '')
+                {
+                    $li['handler']['argument'] []= '';
+                }
+            }
+        }
+
+        return $Block;
+    }
+
+    #
+    # Quote
+
+    protected function blockQuote($Line)
+    {
+        if (preg_match('/^>[ ]?+(.*+)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'blockquote',
+                    'handler' => array(
+                        'function' => 'linesElements',
+                        'argument' => (array) $matches[1],
+                        'destination' => 'elements',
+                    )
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockQuoteContinue($Line, array $Block)
+    {
+        if (isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if ($Line['text'][0] === '>' and preg_match('/^>[ ]?+(.*+)/', $Line['text'], $matches))
+        {
+            $Block['element']['handler']['argument'] []= $matches[1];
+
+            return $Block;
+        }
+
+        if ( ! isset($Block['interrupted']))
+        {
+            $Block['element']['handler']['argument'] []= $Line['text'];
+
+            return $Block;
+        }
+    }
+
+    #
+    # Rule
+
+    protected function blockRule($Line)
+    {
+        $marker = $Line['text'][0];
+
+        if (substr_count($Line['text'], $marker) >= 3 and chop($Line['text'], " $marker") === '')
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'hr',
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # Setext
+
+    protected function blockSetextHeader($Line, array $Block = null)
+    {
+        if ( ! isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if ($Line['indent'] < 4 and chop(chop($Line['text'], ' '), $Line['text'][0]) === '')
+        {
+            $Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
+
+            return $Block;
+        }
+    }
+
+    #
+    # Markup
+
+    protected function blockMarkup($Line)
+    {
+        if ($this->markupEscaped or $this->safeMode)
+        {
+            return;
+        }
+
+        if (preg_match('/^<[\/]?+(\w*)(?:[ ]*+'.$this->regexHtmlAttribute.')*+[ ]*+(\/)?>/', $Line['text'], $matches))
+        {
+            $element = strtolower($matches[1]);
+
+            if (in_array($element, $this->textLevelElements))
+            {
+                return;
+            }
+
+            $Block = array(
+                'name' => $matches[1],
+                'element' => array(
+                    'rawHtml' => $Line['text'],
+                    'autobreak' => true,
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockMarkupContinue($Line, array $Block)
+    {
+        if (isset($Block['closed']) or isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        $Block['element']['rawHtml'] .= "\n" . $Line['body'];
+
+        return $Block;
+    }
+
+    #
+    # Reference
+
+    protected function blockReference($Line)
+    {
+        if (strpos($Line['text'], ']') !== false
+            and preg_match('/^\[(.+?)\]:[ ]*+<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*+$/', $Line['text'], $matches)
+        ) {
+            $id = strtolower($matches[1]);
+
+            $Data = array(
+                'url' => $matches[2],
+                'title' => isset($matches[3]) ? $matches[3] : null,
+            );
+
+            $this->DefinitionData['Reference'][$id] = $Data;
+
+            $Block = array(
+                'element' => array(),
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # Table
+
+    protected function blockTable($Line, array $Block = null)
+    {
+        if ( ! isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if (
+            strpos($Block['element']['handler']['argument'], '|') === false
+            and strpos($Line['text'], '|') === false
+            and strpos($Line['text'], ':') === false
+            or strpos($Block['element']['handler']['argument'], "\n") !== false
+        ) {
+            return;
+        }
+
+        if (chop($Line['text'], ' -:|') !== '')
+        {
+            return;
+        }
+
+        $alignments = array();
+
+        $divider = $Line['text'];
+
+        $divider = trim($divider);
+        $divider = trim($divider, '|');
+
+        $dividerCells = explode('|', $divider);
+
+        foreach ($dividerCells as $dividerCell)
+        {
+            $dividerCell = trim($dividerCell);
+
+            if ($dividerCell === '')
+            {
+                return;
+            }
+
+            $alignment = null;
+
+            if ($dividerCell[0] === ':')
+            {
+                $alignment = 'left';
+            }
+
+            if (substr($dividerCell, - 1) === ':')
+            {
+                $alignment = $alignment === 'left' ? 'center' : 'right';
+            }
+
+            $alignments []= $alignment;
+        }
+
+        # ~
+
+        $HeaderElements = array();
+
+        $header = $Block['element']['handler']['argument'];
+
+        $header = trim($header);
+        $header = trim($header, '|');
+
+        $headerCells = explode('|', $header);
+
+        if (count($headerCells) !== count($alignments))
+        {
+            return;
+        }
+
+        foreach ($headerCells as $index => $headerCell)
+        {
+            $headerCell = trim($headerCell);
+
+            $HeaderElement = array(
+                'name' => 'th',
+                'handler' => array(
+                    'function' => 'lineElements',
+                    'argument' => $headerCell,
+                    'destination' => 'elements',
+                )
+            );
+
+            if (isset($alignments[$index]))
+            {
+                $alignment = $alignments[$index];
+
+                $HeaderElement['attributes'] = array(
+                    'style' => "text-align: $alignment;",
+                );
+            }
+
+            $HeaderElements []= $HeaderElement;
+        }
+
+        # ~
+
+        $Block = array(
+            'alignments' => $alignments,
+            'identified' => true,
+            'element' => array(
+                'name' => 'table',
+                'elements' => array(),
+            ),
+        );
+
+        $Block['element']['elements'] []= array(
+            'name' => 'thead',
+        );
+
+        $Block['element']['elements'] []= array(
+            'name' => 'tbody',
+            'elements' => array(),
+        );
+
+        $Block['element']['elements'][0]['elements'] []= array(
+            'name' => 'tr',
+            'elements' => $HeaderElements,
+        );
+
+        return $Block;
+    }
+
+    protected function blockTableContinue($Line, array $Block)
+    {
+        if (isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if (count($Block['alignments']) === 1 or $Line['text'][0] === '|' or strpos($Line['text'], '|'))
+        {
+            $Elements = array();
+
+            $row = $Line['text'];
+
+            $row = trim($row);
+            $row = trim($row, '|');
+
+            preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]++`|`)++/', $row, $matches);
+
+            $cells = array_slice($matches[0], 0, count($Block['alignments']));
+
+            foreach ($cells as $index => $cell)
+            {
+                $cell = trim($cell);
+
+                $Element = array(
+                    'name' => 'td',
+                    'handler' => array(
+                        'function' => 'lineElements',
+                        'argument' => $cell,
+                        'destination' => 'elements',
+                    )
+                );
+
+                if (isset($Block['alignments'][$index]))
+                {
+                    $Element['attributes'] = array(
+                        'style' => 'text-align: ' . $Block['alignments'][$index] . ';',
+                    );
+                }
+
+                $Elements []= $Element;
+            }
+
+            $Element = array(
+                'name' => 'tr',
+                'elements' => $Elements,
+            );
+
+            $Block['element']['elements'][1]['elements'] []= $Element;
+
+            return $Block;
+        }
+    }
+
+    #
+    # ~
+    #
+
+    protected function paragraph($Line)
+    {
+        return array(
+            'type' => 'Paragraph',
+            'element' => array(
+                'name' => 'p',
+                'handler' => array(
+                    'function' => 'lineElements',
+                    'argument' => $Line['text'],
+                    'destination' => 'elements',
+                ),
+            ),
+        );
+    }
+
+    protected function paragraphContinue($Line, array $Block)
+    {
+        if (isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        $Block['element']['handler']['argument'] .= "\n".$Line['text'];
+
+        return $Block;
+    }
+
+    #
+    # Inline Elements
+    #
+
+    protected $InlineTypes = array(
+        '!' => array('Image'),
+        '&' => array('SpecialCharacter'),
+        '*' => array('Emphasis'),
+        ':' => array('Url'),
+        '<' => array('UrlTag', 'EmailTag', 'Markup'),
+        '[' => array('Link'),
+        '_' => array('Emphasis'),
+        '`' => array('Code'),
+        '~' => array('Strikethrough'),
+        '\\' => array('EscapeSequence'),
+    );
+
+    # ~
+
+    protected $inlineMarkerList = '!*_&[:<`~\\';
+
+    #
+    # ~
+    #
+
+    public function line($text, $nonNestables = array())
+    {
+        return $this->elements($this->lineElements($text, $nonNestables));
+    }
+
+    protected function lineElements($text, $nonNestables = array())
+    {
+        # standardize line breaks
+        $text = str_replace(array("\r\n", "\r"), "\n", $text);
+
+        $Elements = array();
+
+        $nonNestables = (empty($nonNestables)
+            ? array()
+            : array_combine($nonNestables, $nonNestables)
+        );
+
+        # $excerpt is based on the first occurrence of a marker
+
+        while ($excerpt = strpbrk($text, $this->inlineMarkerList))
+        {
+            $marker = $excerpt[0];
+
+            $markerPosition = strlen($text) - strlen($excerpt);
+
+            $Excerpt = array('text' => $excerpt, 'context' => $text);
+
+            foreach ($this->InlineTypes[$marker] as $inlineType)
+            {
+                # check to see if the current inline type is nestable in the current context
+
+                if (isset($nonNestables[$inlineType]))
+                {
+                    continue;
+                }
+
+                $Inline = $this->{"inline$inlineType"}($Excerpt);
+
+                if ( ! isset($Inline))
+                {
+                    continue;
+                }
+
+                # makes sure that the inline belongs to "our" marker
+
+                if (isset($Inline['position']) and $Inline['position'] > $markerPosition)
+                {
+                    continue;
+                }
+
+                # sets a default inline position
+
+                if ( ! isset($Inline['position']))
+                {
+                    $Inline['position'] = $markerPosition;
+                }
+
+                # cause the new element to 'inherit' our non nestables
+
+
+                $Inline['element']['nonNestables'] = isset($Inline['element']['nonNestables'])
+                    ? array_merge($Inline['element']['nonNestables'], $nonNestables)
+                    : $nonNestables
+                ;
+
+                # the text that comes before the inline
+                $unmarkedText = substr($text, 0, $Inline['position']);
+
+                # compile the unmarked text
+                $InlineText = $this->inlineText($unmarkedText);
+                $Elements[] = $InlineText['element'];
+
+                # compile the inline
+                $Elements[] = $this->extractElement($Inline);
+
+                # remove the examined text
+                $text = substr($text, $Inline['position'] + $Inline['extent']);
+
+                continue 2;
+            }
+
+            # the marker does not belong to an inline
+
+            $unmarkedText = substr($text, 0, $markerPosition + 1);
+
+            $InlineText = $this->inlineText($unmarkedText);
+            $Elements[] = $InlineText['element'];
+
+            $text = substr($text, $markerPosition + 1);
+        }
+
+        $InlineText = $this->inlineText($text);
+        $Elements[] = $InlineText['element'];
+
+        foreach ($Elements as &$Element)
+        {
+            if ( ! isset($Element['autobreak']))
+            {
+                $Element['autobreak'] = false;
+            }
+        }
+
+        return $Elements;
+    }
+
+    #
+    # ~
+    #
+
+    protected function inlineText($text)
+    {
+        $Inline = array(
+            'extent' => strlen($text),
+            'element' => array(),
+        );
+
+        $Inline['element']['elements'] = self::pregReplaceElements(
+            $this->breaksEnabled ? '/[ ]*+\n/' : '/(?:[ ]*+\\\\|[ ]{2,}+)\n/',
+            array(
+                array('name' => 'br'),
+                array('text' => "\n"),
+            ),
+            $text
+        );
+
+        return $Inline;
+    }
+
+    protected function inlineCode($Excerpt)
+    {
+        $marker = $Excerpt['text'][0];
+
+        if (preg_match('/^(['.$marker.']++)[ ]*+(.+?)[ ]*+(?<!['.$marker.'])\1(?!'.$marker.')/s', $Excerpt['text'], $matches))
+        {
+            $text = $matches[2];
+            $text = preg_replace('/[ ]*+\n/', ' ', $text);
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'code',
+                    'text' => $text,
+                ),
+            );
+        }
+    }
+
+    protected function inlineEmailTag($Excerpt)
+    {
+        $hostnameLabel = '[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?';
+
+        $commonMarkEmail = '[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]++@'
+            . $hostnameLabel . '(?:\.' . $hostnameLabel . ')*';
+
+        if (strpos($Excerpt['text'], '>') !== false
+            and preg_match("/^<((mailto:)?$commonMarkEmail)>/i", $Excerpt['text'], $matches)
+        ){
+            $url = $matches[1];
+
+            if ( ! isset($matches[2]))
+            {
+                $url = "mailto:$url";
+            }
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $matches[1],
+                    'attributes' => array(
+                        'href' => $url,
+                    ),
+                ),
+            );
+        }
+    }
+
+    protected function inlineEmphasis($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]))
+        {
+            return;
+        }
+
+        $marker = $Excerpt['text'][0];
+
+        if ($Excerpt['text'][1] === $marker and preg_match($this->StrongRegex[$marker], $Excerpt['text'], $matches))
+        {
+            $emphasis = 'strong';
+        }
+        elseif (preg_match($this->EmRegex[$marker], $Excerpt['text'], $matches))
+        {
+            $emphasis = 'em';
+        }
+        else
+        {
+            return;
+        }
+
+        return array(
+            'extent' => strlen($matches[0]),
+            'element' => array(
+                'name' => $emphasis,
+                'handler' => array(
+                    'function' => 'lineElements',
+                    'argument' => $matches[1],
+                    'destination' => 'elements',
+                )
+            ),
+        );
+    }
+
+    protected function inlineEscapeSequence($Excerpt)
+    {
+        if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters))
+        {
+            return array(
+                'element' => array('rawHtml' => $Excerpt['text'][1]),
+                'extent' => 2,
+            );
+        }
+    }
+
+    protected function inlineImage($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '[')
+        {
+            return;
+        }
+
+        $Excerpt['text']= substr($Excerpt['text'], 1);
+
+        $Link = $this->inlineLink($Excerpt);
+
+        if ($Link === null)
+        {
+            return;
+        }
+
+        $Inline = array(
+            'extent' => $Link['extent'] + 1,
+            'element' => array(
+                'name' => 'img',
+                'attributes' => array(
+                    'src' => $Link['element']['attributes']['href'],
+                    'alt' => $Link['element']['handler']['argument'],
+                ),
+                'autobreak' => true,
+            ),
+        );
+
+        $Inline['element']['attributes'] += $Link['element']['attributes'];
+
+        unset($Inline['element']['attributes']['href']);
+
+        return $Inline;
+    }
+
+    protected function inlineLink($Excerpt)
+    {
+        $Element = array(
+            'name' => 'a',
+            'handler' => array(
+                'function' => 'lineElements',
+                'argument' => null,
+                'destination' => 'elements',
+            ),
+            'nonNestables' => array('Url', 'Link'),
+            'attributes' => array(
+                'href' => null,
+                'title' => null,
+            ),
+        );
+
+        $extent = 0;
+
+        $remainder = $Excerpt['text'];
+
+        if (preg_match('/\[((?:[^][]++|(?R))*+)\]/', $remainder, $matches))
+        {
+            $Element['handler']['argument'] = $matches[1];
+
+            $extent += strlen($matches[0]);
+
+            $remainder = substr($remainder, $extent);
+        }
+        else
+        {
+            return;
+        }
+
+        if (preg_match('/^[(]\s*+((?:[^ ()]++|[(][^ )]+[)])++)(?:[ ]+("[^"]*+"|\'[^\']*+\'))?\s*+[)]/', $remainder, $matches))
+        {
+            $Element['attributes']['href'] = $matches[1];
+
+            if (isset($matches[2]))
+            {
+                $Element['attributes']['title'] = substr($matches[2], 1, - 1);
+            }
+
+            $extent += strlen($matches[0]);
+        }
+        else
+        {
+            if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches))
+            {
+                $definition = strlen($matches[1]) ? $matches[1] : $Element['handler']['argument'];
+                $definition = strtolower($definition);
+
+                $extent += strlen($matches[0]);
+            }
+            else
+            {
+                $definition = strtolower($Element['handler']['argument']);
+            }
+
+            if ( ! isset($this->DefinitionData['Reference'][$definition]))
+            {
+                return;
+            }
+
+            $Definition = $this->DefinitionData['Reference'][$definition];
+
+            $Element['attributes']['href'] = $Definition['url'];
+            $Element['attributes']['title'] = $Definition['title'];
+        }
+
+        return array(
+            'extent' => $extent,
+            'element' => $Element,
+        );
+    }
+
+    protected function inlineMarkup($Excerpt)
+    {
+        if ($this->markupEscaped or $this->safeMode or strpos($Excerpt['text'], '>') === false)
+        {
+            return;
+        }
+
+        if ($Excerpt['text'][1] === '/' and preg_match('/^<\/\w[\w-]*+[ ]*+>/s', $Excerpt['text'], $matches))
+        {
+            return array(
+                'element' => array('rawHtml' => $matches[0]),
+                'extent' => strlen($matches[0]),
+            );
+        }
+
+        if ($Excerpt['text'][1] === '!' and preg_match('/^<!---?[^>-](?:-?+[^-])*-->/s', $Excerpt['text'], $matches))
+        {
+            return array(
+                'element' => array('rawHtml' => $matches[0]),
+                'extent' => strlen($matches[0]),
+            );
+        }
+
+        if ($Excerpt['text'][1] !== ' ' and preg_match('/^<\w[\w-]*+(?:[ ]*+'.$this->regexHtmlAttribute.')*+[ ]*+\/?>/s', $Excerpt['text'], $matches))
+        {
+            return array(
+                'element' => array('rawHtml' => $matches[0]),
+                'extent' => strlen($matches[0]),
+            );
+        }
+    }
+
+    protected function inlineSpecialCharacter($Excerpt)
+    {
+        if (substr($Excerpt['text'], 1, 1) !== ' ' and strpos($Excerpt['text'], ';') !== false
+            and preg_match('/^&(#?+[0-9a-zA-Z]++);/', $Excerpt['text'], $matches)
+        ) {
+            return array(
+                'element' => array('rawHtml' => '&' . $matches[1] . ';'),
+                'extent' => strlen($matches[0]),
+            );
+        }
+
+        return;
+    }
+
+    protected function inlineStrikethrough($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]))
+        {
+            return;
+        }
+
+        if ($Excerpt['text'][1] === '~' and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches))
+        {
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'del',
+                    'handler' => array(
+                        'function' => 'lineElements',
+                        'argument' => $matches[1],
+                        'destination' => 'elements',
+                    )
+                ),
+            );
+        }
+    }
+
+    protected function inlineUrl($Excerpt)
+    {
+        if ($this->urlsLinked !== true or ! isset($Excerpt['text'][2]) or $Excerpt['text'][2] !== '/')
+        {
+            return;
+        }
+
+        if (strpos($Excerpt['context'], 'http') !== false
+            and preg_match('/\bhttps?+:[\/]{2}[^\s<]+\b\/*+/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE)
+        ) {
+            $url = $matches[0][0];
+
+            $Inline = array(
+                'extent' => strlen($matches[0][0]),
+                'position' => $matches[0][1],
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $url,
+                    'attributes' => array(
+                        'href' => $url,
+                    ),
+                ),
+            );
+
+            return $Inline;
+        }
+    }
+
+    protected function inlineUrlTag($Excerpt)
+    {
+        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\w++:\/{2}[^ >]++)>/i', $Excerpt['text'], $matches))
+        {
+            $url = $matches[1];
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $url,
+                    'attributes' => array(
+                        'href' => $url,
+                    ),
+                ),
+            );
+        }
+    }
+
+    # ~
+
+    protected function unmarkedText($text)
+    {
+        $Inline = $this->inlineText($text);
+        return $this->element($Inline['element']);
+    }
+
+    #
+    # Handlers
+    #
+
+    protected function handle(array $Element)
+    {
+        if (isset($Element['handler']))
+        {
+            if (!isset($Element['nonNestables']))
+            {
+                $Element['nonNestables'] = array();
+            }
+
+            if (is_string($Element['handler']))
+            {
+                $function = $Element['handler'];
+                $argument = $Element['text'];
+                unset($Element['text']);
+                $destination = 'rawHtml';
+            }
+            else
+            {
+                $function = $Element['handler']['function'];
+                $argument = $Element['handler']['argument'];
+                $destination = $Element['handler']['destination'];
+            }
+
+            $Element[$destination] = $this->{$function}($argument, $Element['nonNestables']);
+
+            if ($destination === 'handler')
+            {
+                $Element = $this->handle($Element);
+            }
+
+            unset($Element['handler']);
+        }
+
+        return $Element;
+    }
+
+    protected function handleElementRecursive(array $Element)
+    {
+        return $this->elementApplyRecursive(array($this, 'handle'), $Element);
+    }
+
+    protected function handleElementsRecursive(array $Elements)
+    {
+        return $this->elementsApplyRecursive(array($this, 'handle'), $Elements);
+    }
+
+    protected function elementApplyRecursive($closure, array $Element)
+    {
+        $Element = call_user_func($closure, $Element);
+
+        if (isset($Element['elements']))
+        {
+            $Element['elements'] = $this->elementsApplyRecursive($closure, $Element['elements']);
+        }
+        elseif (isset($Element['element']))
+        {
+            $Element['element'] = $this->elementApplyRecursive($closure, $Element['element']);
+        }
+
+        return $Element;
+    }
+
+    protected function elementApplyRecursiveDepthFirst($closure, array $Element)
+    {
+        if (isset($Element['elements']))
+        {
+            $Element['elements'] = $this->elementsApplyRecursiveDepthFirst($closure, $Element['elements']);
+        }
+        elseif (isset($Element['element']))
+        {
+            $Element['element'] = $this->elementsApplyRecursiveDepthFirst($closure, $Element['element']);
+        }
+
+        $Element = call_user_func($closure, $Element);
+
+        return $Element;
+    }
+
+    protected function elementsApplyRecursive($closure, array $Elements)
+    {
+        foreach ($Elements as &$Element)
+        {
+            $Element = $this->elementApplyRecursive($closure, $Element);
+        }
+
+        return $Elements;
+    }
+
+    protected function elementsApplyRecursiveDepthFirst($closure, array $Elements)
+    {
+        foreach ($Elements as &$Element)
+        {
+            $Element = $this->elementApplyRecursiveDepthFirst($closure, $Element);
+        }
+
+        return $Elements;
+    }
+
+    protected function element(array $Element)
+    {
+        if ($this->safeMode)
+        {
+            $Element = $this->sanitiseElement($Element);
+        }
+
+        # identity map if element has no handler
+        $Element = $this->handle($Element);
+
+        $hasName = isset($Element['name']);
+
+        $markup = '';
+
+        if ($hasName)
+        {
+            $markup .= '<' . $Element['name'];
+
+            if (isset($Element['attributes']))
+            {
+                foreach ($Element['attributes'] as $name => $value)
+                {
+                    if ($value === null)
+                    {
+                        continue;
+                    }
+
+                    $markup .= " $name=\"".self::escape($value).'"';
+                }
+            }
+        }
+
+        $permitRawHtml = false;
+
+        if (isset($Element['text']))
+        {
+            $text = $Element['text'];
+        }
+        // very strongly consider an alternative if you're writing an
+        // extension
+        elseif (isset($Element['rawHtml']))
+        {
+            $text = $Element['rawHtml'];
+
+            $allowRawHtmlInSafeMode = isset($Element['allowRawHtmlInSafeMode']) && $Element['allowRawHtmlInSafeMode'];
+            $permitRawHtml = !$this->safeMode || $allowRawHtmlInSafeMode;
+        }
+
+        $hasContent = isset($text) || isset($Element['element']) || isset($Element['elements']);
+
+        if ($hasContent)
+        {
+            $markup .= $hasName ? '>' : '';
+
+            if (isset($Element['elements']))
+            {
+                $markup .= $this->elements($Element['elements']);
+            }
+            elseif (isset($Element['element']))
+            {
+                $markup .= $this->element($Element['element']);
+            }
+            else
+            {
+                if (!$permitRawHtml)
+                {
+                    $markup .= self::escape($text, true);
+                }
+                else
+                {
+                    $markup .= $text;
+                }
+            }
+
+            $markup .= $hasName ? '</' . $Element['name'] . '>' : '';
+        }
+        elseif ($hasName)
+        {
+            $markup .= ' />';
+        }
+
+        return $markup;
+    }
+
+    protected function elements(array $Elements)
+    {
+        $markup = '';
+
+        $autoBreak = true;
+
+        foreach ($Elements as $Element)
+        {
+            if (empty($Element))
+            {
+                continue;
+            }
+
+            $autoBreakNext = (isset($Element['autobreak'])
+                ? $Element['autobreak'] : isset($Element['name'])
+            );
+            // (autobreak === false) covers both sides of an element
+            $autoBreak = !$autoBreak ? $autoBreak : $autoBreakNext;
+
+            $markup .= ($autoBreak ? "\n" : '') . $this->element($Element);
+            $autoBreak = $autoBreakNext;
+        }
+
+        $markup .= $autoBreak ? "\n" : '';
+
+        return $markup;
+    }
+
+    # ~
+
+    protected function li($lines)
+    {
+        $Elements = $this->linesElements($lines);
+
+        if ( ! in_array('', $lines)
+            and isset($Elements[0]) and isset($Elements[0]['name'])
+            and $Elements[0]['name'] === 'p'
+        ) {
+            unset($Elements[0]['name']);
+        }
+
+        return $Elements;
+    }
+
+    #
+    # AST Convenience
+    #
+
+    /**
+     * Replace occurrences $regexp with $Elements in $text. Return an array of
+     * elements representing the replacement.
+     */
+    protected static function pregReplaceElements($regexp, $Elements, $text)
+    {
+        $newElements = array();
+
+        while (preg_match($regexp, $text, $matches, PREG_OFFSET_CAPTURE))
+        {
+            $offset = $matches[0][1];
+            $before = substr($text, 0, $offset);
+            $after = substr($text, $offset + strlen($matches[0][0]));
+
+            $newElements[] = array('text' => $before);
+
+            foreach ($Elements as $Element)
+            {
+                $newElements[] = $Element;
+            }
+
+            $text = $after;
+        }
+
+        $newElements[] = array('text' => $text);
+
+        return $newElements;
+    }
+
+    #
+    # Deprecated Methods
+    #
+
+    function parse($text)
+    {
+        $markup = $this->text($text);
+
+        return $markup;
+    }
+
+    protected function sanitiseElement(array $Element)
+    {
+        static $goodAttribute = '/^[a-zA-Z0-9][a-zA-Z0-9-_]*+$/';
+        static $safeUrlNameToAtt  = array(
+            'a'   => 'href',
+            'img' => 'src',
+        );
+
+        if ( ! isset($Element['name']))
+        {
+            unset($Element['attributes']);
+            return $Element;
+        }
+
+        if (isset($safeUrlNameToAtt[$Element['name']]))
+        {
+            $Element = $this->filterUnsafeUrlInAttribute($Element, $safeUrlNameToAtt[$Element['name']]);
+        }
+
+        if ( ! empty($Element['attributes']))
+        {
+            foreach ($Element['attributes'] as $att => $val)
+            {
+                # filter out badly parsed attribute
+                if ( ! preg_match($goodAttribute, $att))
+                {
+                    unset($Element['attributes'][$att]);
+                }
+                # dump onevent attribute
+                elseif (self::striAtStart($att, 'on'))
+                {
+                    unset($Element['attributes'][$att]);
+                }
+            }
+        }
+
+        return $Element;
+    }
+
+    protected function filterUnsafeUrlInAttribute(array $Element, $attribute)
+    {
+        foreach ($this->safeLinksWhitelist as $scheme)
+        {
+            if (self::striAtStart($Element['attributes'][$attribute], $scheme))
+            {
+                return $Element;
+            }
+        }
+
+        $Element['attributes'][$attribute] = str_replace(':', '%3A', $Element['attributes'][$attribute]);
+
+        return $Element;
+    }
+
+    #
+    # Static Methods
+    #
+
+    protected static function escape($text, $allowQuotes = false)
+    {
+        return htmlspecialchars($text, $allowQuotes ? ENT_NOQUOTES : ENT_QUOTES, 'UTF-8');
+    }
+
+    protected static function striAtStart($string, $needle)
+    {
+        $len = strlen($needle);
+
+        if ($len > strlen($string))
+        {
+            return false;
+        }
+        else
+        {
+            return strtolower(substr($string, 0, $len)) === strtolower($needle);
+        }
+    }
+
+    static function instance($name = 'default')
+    {
+        if (isset(self::$instances[$name]))
+        {
+            return self::$instances[$name];
+        }
+
+        $instance = new static();
+
+        self::$instances[$name] = $instance;
+
+        return $instance;
+    }
+
+    private static $instances = array();
+
+    #
+    # Fields
+    #
+
+    protected $DefinitionData;
+
+    #
+    # Read-Only
+
+    protected $specialCharacters = array(
+        '\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|', '~'
+    );
+
+    protected $StrongRegex = array(
+        '*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*+[*])+?)[*]{2}(?![*])/s',
+        '_' => '/^__((?:\\\\_|[^_]|_[^_]*+_)+?)__(?!_)/us',
+    );
+
+    protected $EmRegex = array(
+        '*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
+        '_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us',
+    );
+
+    protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*+(?:\s*+=\s*+(?:[^"\'=<>`\s]+|"[^"]*+"|\'[^\']*+\'))?+';
+
+    protected $voidElements = array(
+        'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source',
+    );
+
+    protected $textLevelElements = array(
+        'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
+        'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
+        'i', 'rp', 'del', 'code',          'strike', 'marquee',
+        'q', 'rt', 'ins', 'font',          'strong',
+        's', 'tt', 'kbd', 'mark',
+        'u', 'xm', 'sub', 'nobr',
+                   'sup', 'ruby',
+                   'var', 'span',
+                   'wbr', 'time',
+    );
+}

config.php

@@ -0,0 +1,10 @@
+<?php
+
+define("SITE_URL", "http://localhost:8080");
+define("SITE_NAME", "Weblog");
+define("SITE_TAGLINE", "A log of the web");
+define("SITE_LANGUAGE", "en-nz");
+define("PUBLICATION_DIR", "ppubs");
+define("PUBLICATION_NAME", "Post");
+
+?>

content_template.php

@@ -0,0 +1,37 @@
+<?php
+
+function content_start($ppub) {
+    $metadata = $ppub->metadata;
+    ?>
+
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title><?php echo(htmlentities($metadata["title"]));?> - <?php echo(SITE_NAME);?></title>
+        <meta name="description" content="<?php echo(htmlentities($metadata["description"]));?>">
+        <meta name="author" content="<?php echo(htmlentities($metadata["author"]));?>">
+        <link rel="stylesheet" href="/vanilla.css">
+        <link rel="alternate" type="application/x-ppub" title="<?php echo(htmlentities($metadata["title"]));?> (as PPUB)" href="?download=true" />
+    </head>
+    <body>
+    <?php
+}
+
+function content_html($content) {
+    echo $content;
+}
+
+function content_end($ppub) {
+    ?>
+    <footer role="contentinfo">
+        <hr>
+        <p><strong><?php echo(htmlentities($ppub->metadata["title"]));?></strong><br/>Post authored by <?php echo(htmlentities($ppub->metadata["author"]));?>.<br/><a href="/">Return to <?php echo(PUBLICATION_NAME);?> Index</a> | <a href="/feed.rss">Subscribe to <?php echo(SITE_NAME);?> RSS</a> | <a href="?download=true">Download <?php echo(PUBLICATION_NAME);?> PPUB</a></p>
+        <p><br/><small>Powered by php-ppub, styled with <a href="https://vanillacss.com/">Vanilla CSS</a>.</small></p>
+    </footer>
+    </body>
+</html>
+    <?php
+}
+
+?>

index.php

@@ -0,0 +1,89 @@
+<?php
+include("config.php");
+include("ppub.php");
+
+$file = $_GET["ppub"];
+$asset = urldecode($_GET["asset"]);
+
+error_log($_SERVER['REQUEST_URI']);
+if($asset == '' and $_SERVER['REQUEST_URI'][-1] != '/') {
+    header("location: " . $_SERVER['REQUEST_URI'] . "/");
+}
+
+
+if($file == "" or $file == "/" or $file == "feed.rss") {
+    if($file == "feed.rss") {
+        header("content-type: application/rss+xml");
+        include("rss_template.php");
+    }
+    else {
+        header("content-type: text/html");
+        include("index_template.php");
+    }
+    index_start();
+    
+    $dir = opendir(PUBLICATION_DIR . "/");
+    $list = array();
+    while($file = readdir($dir)){
+        if ($file != '.' and $file != '..'){
+            $ctime = filectime(PUBLICATION_DIR . "/" . $file) . ',' . $file;
+            $list[$ctime] = $file;
+        }
+    }
+    closedir($dir);
+    krsort($list);
+    
+    foreach ($list as $file) {
+        $ppub = new Ppub();
+        $ppub->read_file(PUBLICATION_DIR . "/".$file);
+        index_listing($ppub, $file);
+    }
+
+    index_end();
+    exit();
+}
+
+$file = str_replace("/", "", $file);
+$file_name = $file;
+$file = PUBLICATION_DIR . "/" . $file;
+if(!file_exists($file)){
+    header('HTTP/1.1 404 Not Found');
+    include("404.php");
+    exit();
+}
+
+$accepts = $_SERVER["HTTP_ACCEPT"];
+if(($asset == "" or $asset == "/") and strpos($accepts, "application/x-ppub") !== false or isset($_GET["download"])) {
+    header("content-type: application/x-ppub");
+    if(isset($_GET["download"])) {
+        header("Content-Disposition: attachment; filename=\"".$file_name."\"");
+    }
+    echo(readfile($file));
+    exit();
+}
+
+$ppub = new Ppub();
+$ppub->read_file($file);
+
+if($asset == "" or $asset == "/") {
+    $asset = $ppub->asset_list[1];
+}
+else {
+    $asset = $ppub->asset_index[$asset];
+}
+
+if(strpos($accepts, "text/html") !== false && $asset->mimetype == "text/markdown") {
+    header("content-type: text/html");
+    include("content_template.php");
+    include("Parsedown.php");
+    $pd = new Parsedown();
+    content_start($ppub);
+    content_html($pd->text($ppub->read_asset($asset)));
+    content_end($ppub);
+}
+else {
+    header("content-type: " . $asset->mimetype);
+    echo($ppub->read_asset($asset));
+}
+
+?>

index_template.php

@@ -0,0 +1,36 @@
+<?php
+
+function index_start() {
+
+    ?>
+
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title><?php echo(PUBLICATION_NAME)?> Index - <?php echo(SITE_NAME);?></title>
+        <link rel="stylesheet" href="/vanilla.css">
+        <link rel="alternate" type="application/rss+xml" title="<?php echo(SITE_NAME);?> RSS Feed" href="/feed.rss" />
+    </head>
+    <body>
+        <h1><?php echo(SITE_NAME);?> <?php echo(PUBLICATION_NAME)?> Index</h1>
+        <dl>
+    <?php
+}
+
+function index_listing($ppub, $url) {
+    ?>
+            <dt><a href="<?php echo($url);?>"><?php echo(htmlentities($ppub->metadata["title"]));?></a></dt>
+            <dd><?php echo(htmlentities($ppub->metadata["description"]));?></dd>
+    <?php
+}
+
+function index_end() {
+    ?>
+    </dl>
+    </body>
+</html>
+    <?php
+}
+
+?>

ppub.php

@@ -0,0 +1,94 @@
+<?php
+class Asset {
+    public $path = "";
+    public $mimetype = "";
+    public $start_location = 0;
+    public $end_location = 0;
+    public $flags = array();
+
+    public function __construct($path, $mimetype, $slocation, $elocation, $flags) {
+        $this->path = $path;
+        $this->mimetype = $mimetype;
+        $this->start_location = $slocation;
+        $this->end_location = $elocation;
+        $this->flags = $flags;
+    }
+}
+
+
+class Ppub {
+    public $metadata = array();
+    public $asset_index = array();
+    public $asset_list = array();
+    public $default_asset = null;
+
+    private $handle = null;
+    private $blob_start = 0;
+
+    public function read_file($file_path) {
+        $handle = fopen($file_path, "rb");
+        if(fread($handle, 5) != "ppub\n"){
+            throw new Exception("File did not start with magic number", 1);
+        }
+
+        $head_size_string = "";
+        $next_char = '';
+        while($next_char != "\n"){
+            $head_size_string .= $next_char;
+            $next_char = fread($handle, 1);
+        }
+        
+        $index_length = intval($head_size_string);
+        $index_data = fread($handle, $index_length);
+
+        $this->handle = $handle;
+        $this->blob_start = strlen($head_size_string) + $index_length + 6; 
+        $this->build_asset_list($index_data);
+        $this->build_metadata($this->read_asset($this->asset_list[0]));
+    }
+
+    public function read_asset($asset) {
+        $start_location = $asset->start_location + $this->blob_start;
+        $length = $asset->end_location - $asset->start_location;
+        fseek($this->handle, $start_location);
+        $data = fread($this->handle, $length);
+        if(in_array("gzip", $asset->flags)) {
+            $data = gzdecode($data);
+        }
+        return $data;
+    }
+
+    private function build_asset_list($data) {
+        $asset_list = array();
+        $lines = explode("\n", $data);
+        for ($i=0; $i < sizeof($lines); $i++) { 
+            if(trim($lines[$i]) == ''){
+                continue;
+            }
+            $keyval = explode(": ", $lines[$i], 2);
+            $vals = explode(" ", $keyval[1]);
+            
+            $asset = new Asset($keyval[0], $vals[0], intval($vals[1]), intval($vals[2]), array_slice($vals, 3));
+            array_push($asset_list, $asset);
+            $this->asset_index[$asset->path] = $asset;
+        }
+
+        $this->asset_list = $asset_list;
+    }
+
+    private function build_metadata($data) {
+        $data_list = array();
+        $lines = explode("\n", $data);
+        for ($i=0; $i < sizeof($lines); $i++) { 
+            if(trim($lines[$i]) == ''){
+                continue;
+            }
+            $keyval = explode(": ", $lines[$i], 2);            
+            $data_list[$keyval[0]] = $keyval[1];
+        }
+        $this->metadata = $data_list;
+    }
+}
+
+
+?>

router.php

@@ -0,0 +1,19 @@
+<?php
+
+$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
+
+// Exclude some paths from being rewritten
+if (dirname($path) == '/' && pathinfo($path, PATHINFO_EXTENSION) == 'css') {
+  return false;
+}
+else {
+  $file = 'index.php';
+
+  // Split into two parts, the ppub and the path within the ppub
+  $parts = explode("/", $path, 3);
+  $_GET['ppub'] = $parts[1];
+  $_GET['asset'] = $parts[2];
+}
+
+$_SERVER['SCRIPT_NAME'] = '/' . $file;
+require $file;

rss_template.php

@@ -0,0 +1,33 @@
+<?php
+
+function index_start() {
+?>
+<?xml version='1.0' encoding='UTF-8'?>
+<rss version='2.0'>
+    <channel> 
+
+        <title><?php echo(SITE_NAME);?></title>
+        <link><?php echo(SITE_URL);?></link>
+        <description><?php echo(SITE_TAGLINE);?></description>
+        <language><?php echo(SITE_LANGUAGE);?></language>
+<?php
+}
+
+function index_listing($ppub, $url) {
+?>
+        <item>
+            <title><?php echo(htmlentities($ppub->metadata["title"]));?></title>
+            <link><?php echo(SITE_URL . "/" . $url)?></link>
+            <description><?php echo(htmlentities($ppub->metadata["description"]));?></description>
+        </item>
+<?php
+}
+
+function index_end() {
+?>
+    </channel>
+</rss>
+<?php
+}
+
+?>

vanilla.css

@@ -0,0 +1,172 @@
+/* Reset */
+html, body, div, span, applet, object, iframe,
+h1, h2, h3, h4, h5, h6, p, blockquote, pre,
+a, abbr, acronym, address, big, cite, code,
+del, dfn, em, img, ins, kbd, q, s, samp,
+small, strike, strong, sub, sup, tt, var,
+b, u, i, center,
+dl, dt, dd, ol, ul, li,
+fieldset, form, label, legend,
+table, caption, tbody, tfoot, thead, tr, th, td,
+article, aside, canvas, details, embed,
+figure, figcaption, footer, header, hgroup,
+menu, nav, output, ruby, section, summary,
+time, mark, audio, video {
+    margin: 0;
+    padding: 0;
+    border: 0;
+    font-size: 100%;
+    font: inherit;
+    vertical-align: baseline;
+}
+
+* {
+    box-sizing: border-box;
+}
+
+/* Variables */
+:root {
+    --desktop-font-size: 1.2rem/1.5;
+    --mobile-font-size: 1rem/1.4;
+    --text-color: #2d2d2d;
+    --link-color: blue;
+    --link-color-alt: darkblue;
+    --primary-color: lightsteelblue;
+    --secondary-color: aliceblue;
+    --tertiary-color: whitesmoke;
+}
+
+/* Typography */
+body {
+    color: var(--text-color);
+    margin: 0 auto;
+    max-width: 75ch;
+    padding: 0 0.5rem;
+}
+body, input {
+    font: var(--desktop-font-size) -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto, Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji", "Segoe UI Symbol";
+}
+
+h1,h2,h3,h4,h5,h6,p,blockquote,dl,img,figure {
+    margin: 2rem 0;
+}
+
+h1,h2,h3,h4,h5,h6 { font-weight: bold; line-height: 1.2; }
+h1 { font-size: 200%; }
+h2 { font-size: 150%; }
+h3 { font-size: 120%; }
+h4,h5,h6 { font-size: 100%; }
+h5, h6 { text-transform: uppercase; }
+
+header h1 { border-bottom: 1px solid; }
+
+p { margin: 2rem 0; }
+
+a,a:visited { color: var(--link-color); }
+a:hover,a:focus { color: var(--link-color-alt); }
+
+strong, time, b { font-weight: bold; }
+em, dfn, i { font-style: italic; }
+sub { font-size: 60%; vertical-align: bottom; }
+small { font-size: 80%; }
+
+blockquote, q {
+    background: var(--secondary-color);
+    border-left: 10px solid var(--primary-color);
+    display: block;
+    font-family: "Georgia", serif;
+    padding: 1rem;
+}
+blockquote p:first-child { margin-top: 0; }
+blockquote p:last-child { margin-bottom: 0; }
+cite {
+    font-family: "Georgia", serif;
+    font-style: italic;
+    font-weight: bold;
+    margin-top: 1rem;
+}
+
+kbd,code,samp,pre,var { font-family: monospace; }
+code, pre {
+    background: var(--tertiary-color);
+    overflow: auto;
+    padding: 0.5rem 1rem;
+}
+code pre , pre code { padding: 0; }
+
+/* Elements */
+hr {
+    background: var(--text-color);
+    border: 0;
+    height: 1px;
+    margin: 4rem 0;
+}
+
+img {
+    display: block;
+    height: auto; 
+    max-width: 100%; 
+}
+
+figure {
+    border: 1px solid var(--primary-color);
+    display: inline-block;
+    padding: 1rem;
+    width: 100%;
+}
+figure img { margin: 0 auto; }
+figure figcaption { font-size: 80%; margin-top: 0.5rem; text-align: center; }
+
+ul, ol { margin: 2rem 0; padding: 0 0 0 4rem; }
+
+dl dd { padding-left: 2rem; }
+
+table {
+    border: 1px solid var(--primary-color);
+    border-collapse: collapse;
+    table-layout: fixed;
+    text-align: left;
+    width: 100%;
+}
+table caption { margin: 2rem 0; }
+table tr { border-bottom: 1px solid var(--primary-color); }
+table tbody tr:nth-child(even) { background: var(--tertiary-color); }
+table th { background: var(--secondary-color); font-weight: bold; }
+table th, table td { padding: 1rem; }
+table th:not(last-of-type), table td:not(last-of-type) { border-right: 1px solid var(--primary-color); }
+
+input { 
+    appearance: none; 
+    border: 1px solid var(--text-color);
+    display: block;
+    margin: 0.5rem 0;
+    padding: 0.8rem; 
+}
+input:focus, input:active { background-color: var(--secondary-color); border-color: var(--link-color); }
+
+/* Mobile Styling */
+@media screen and (max-width: 75ch) {
+    body, input {
+        font: var(--mobile-font-size) -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto, Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji", "Segoe UI Symbol";
+    }
+    table { table-layout: auto; }
+}
+
+/* Dark mode support */
+@media (prefers-color-scheme: dark) {
+    body {
+        background: #191919;
+    }
+    input:focus, input:active {
+        background-color: var(--text-color);
+        color: var(--secondary-color);
+    }
+    :root {
+        --text-color: #fff;
+        --link-color: orange;
+        --link-color-alt: yellow;
+        --primary-color: orange;
+        --secondary-color: black;
+        --tertiary-color: #2d2d2d;
+    }
+}