Parsedown 使用 composer 安装的

application/common.php

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<?php
/**
 * 下划线转驼峰
 * 思路:
 * step1.原字符串转小写,原字符串中的分隔符用空格替换,在字符串开头加上分隔符
 * step2.将字符串中每个单词的首字母转换为大写,再去空格,去字符串首部附加的分隔符.
 */
function camelize($uncamelized_words, $separator='_')
{
    $uncamelized_words = $separator. str_replace($separator, " ", strtolower($uncamelized_words));
    return ltrim(str_replace(" ", "", ucwords($uncamelized_words)), $separator );
}
/**
 * 驼峰命名转下划线命名
 * 思路:
 * 小写和大写紧挨一起的地方,加上分隔符,然后全部转小写
 */
function uncamelize($camelCaps, $separator='_')
{
    return strtolower(preg_replace('/([a-z])([A-Z])/', "$1" . $separator . "$2", $camelCaps));
}
/**
 * 防sql注入字符串转义
 * @param $content 要转义内容
 * @return array|string
 */
function escapeString($content)
{
    $pattern = "/(select[\s])|(insert[\s])|(update[\s])|(delete[\s])|(from[\s])|(where[\s])|(drop[\s])/i";
    if (is_array($content)) {
        foreach ($content as $key => $value) {
            $content[$key] = addslashes(trim($value));
            if (preg_match($pattern, $content[$key])) {
                echo $content[$key];
                $content[$key] = '';
            }
        }
    } else {
        $content = addslashes(trim($content));
        if (preg_match($pattern, $content)) {
            $content = '';
        }
    }
    return $content;
}

application/model/MySqlite.php

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<?php
namespace app;
class MySqlite
{
    private $mydb;
    protected $tablename;
    public function __construct()
    {
        $mydb = new \SQLite3(DB . DS . 'mysqlitedb.db');
        if (!$mydb) {
            throw new \Exception("$mydb->lastErrorMsg()", 1);
        } else {
            // echo "Opened database successfully\n";
            $this->mydb = $mydb;
        }
    }
    /**
     * 执行sql
     * @param string $sql
     * @return mixd $res
     */
    public function exec($sql)
    {
        @$res = $this->mydb->exec($sql);
        return $res;
    }
    public function query($sql)
    {
        $result = $this->mydb->query($sql);
        return $result;
    }
    
    public function lastInsertRowID ()
    {
        $result = $this->mydb->lastInsertRowID();
        return $result;
    }
    public function lastErrorMsg()
    {
        return $this->mydb->lastErrorMsg();
    }
    /**
     * 查询数组列表
     */
    public function select($sql)
    {
        $result = $this->mydb->query($sql);
        $data = array();
        // var_dump($result);exit;
        while ($arr = $result->fetchArray(SQLITE3_ASSOC)) {
            $data[] = $arr;
        }
        return $data;
    }
    /**
     * 查询一条
     */
    public function getOneById($id, $tablename='')
    {
        $tablename = $tablename ? $tablename : $this->tablename;
        $sql = "SELECT * FROM `$tablename` WHERE `id`=$id;";
        $result = $this->mydb->query($sql);
        // var_dump($result);
        $data = $result->fetchArray(SQLITE3_ASSOC);
        // var_dump($data);
        return $data;
    }
    public function getOne($sql = "")
    {
        $result = $this->mydb->query($sql);
        // var_dump($result);
        $data = $result->fetchArray(SQLITE3_ASSOC);
        // var_dump($data);
        return $data;
    }
    /**
     * 单列合计
     */
    public function sumColumn($column, $tablename)
    {
        $tablename = $tablename ? $tablename : $this->tablename;
        $sql = "SELECT sum(`$column`) as sumData FROM `$tablename`;";
        $result = $this->mydb->query($sql);
        // $data = $result->fetchArray();
        // var_dump($data['sumData']);exit;
        if ($data = $result->fetchArray(SQLITE3_ASSOC)) {
            return $data['sumData'];
        }
        return 0;
    }
    /**
     * 列表结果集
     */
    public function dataList($where='', $order= '', $desc = false, $limit = 0)
    {
        if ($order) {
            $where .= " order by $order";
            if ($desc) {
                $where .= " desc";
            } else {
                $where .= " asc";
            }
        }
        if ($limit) {
            $where .= " limit " . $limit;
        }
        $sql = "select * from $this->tablename $where;";
        
        return $this->select($sql);
    }
    /**
     * 分页结果
     */
    public function pageList($where, $page = 1, $limit = 10)
    {
        $res = $this->query("select count(*) as total from $this->tablename $where;"); 
        $data = $res->fetchArray(SQLITE3_ASSOC);
        
        $offset = ($page - 1) * $limit;
        $sql = "select * from $this->tablename $where limit $offset, $limit;";
        $list = $this->select($sql);
        $data['list'] = $list;
        $data['page'] = $page;
        $data['limit'] = $limit;
        
        return $data;
    }
    
    //public function list($where='')
    //{
    //    $sql = "select * from $this->tablename $where;";
    //    return $this->select($sql);
    //}
    public function listByName($name='', $order = '', $desc = false)
    {
        $where = "";
        if ($name) {
            $where = " where name like '%$name%'";
        }
        if ($order) {
            $where .= " order by $order";
            if ($desc) {
                $where .= " desc";
            } else {
                $where .= " asc";
            }
        }
        $sql = "select * from $this->tablename $where;";
        $res = $this->select($sql);
        return $res;
    }
    /**
     * save
     */
    public function save($data)
    {
        $columns = "";
        $values = "";
        foreach ($data as $key => $value) {
            $columns .=  "`" . $key . "`,";
            $values .=  "'" . $value . "',";
        }
        $columns = rtrim($columns, ',');
        $values = rtrim($values, ',');
        $sql = "INSERT INTO `$this->tablename`(" . $columns . ") VALUES(". $values . ");";
        return $this->exec($sql);
    }
    
    /**
     * updateById
     */
    public function updateById($data)
    {
        $id = $data['id'];
        unset($data['id']);
        $columns = "";
        foreach ($data as $key => $value) {
            $columns .= "`" . $key . "`='" . $value ."',";
        }
        $columns = rtrim($columns, ',');
        $sql = "UPDATE `$this->tablename` SET $columns WHERE `id`=$id";
        return $this->exec($sql);
    }
    /**
     * deleteByIds
     */
    public function deleteById($id)
    {
        $sql = "DELETE FROM `$this->tablename` WHERE `id` IN(";
        if (is_array($id)) {
            for ($i=0; $i < count($id); $i++) { 
                $sql .= $id[$i] . ',';
            }
            $sql = rtrim($sql, ',');
            $sql .= ");";
        } else {
            $sql = "DELETE FROM `$this->tablename` WHERE `id`=$id;";
        }
        return $this->exec($sql);
    }
    public function __destruct()
    {
        $this->mydb->close();
    }
}

application/parsedown/LICENSE.txt

@@ -1,20 +0,0 @@
The MIT License (MIT)
Copyright (c) 2013-2018 Emanuil Rusev, erusev.com
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

application/parsedown/Parsedown.php

@@ -1,1994 +0,0 @@
<?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',
    );
}

application/parsedown/README.md

@@ -1,157 +0,0 @@
<!-- ![Parsedown](https://i.imgur.com/yE8afYV.png) -->
<p align="center"><img alt="Parsedown" src="https://i.imgur.com/fKVY6Kz.png" width="240" /></p>
<h1>Parsedown</h1>
[![Build Status](https://travis-ci.org/erusev/parsedown.svg)](https://travis-ci.org/erusev/parsedown)
[![Total Downloads](https://poser.pugx.org/erusev/parsedown/d/total.svg)](https://packagist.org/packages/erusev/parsedown)
[![Version](https://poser.pugx.org/erusev/parsedown/v/stable.svg)](https://packagist.org/packages/erusev/parsedown)
[![License](https://poser.pugx.org/erusev/parsedown/license.svg)](https://packagist.org/packages/erusev/parsedown)
Better Markdown Parser in PHP - <a href="http://parsedown.org/demo">Demo</a>.
## Features
* One File
* No Dependencies
* [Super Fast](http://parsedown.org/speed)
* Extensible
* [GitHub flavored](https://github.github.com/gfm)
* [Tested](http://parsedown.org/tests/) in 5.3 to 7.3
* [Markdown Extra extension](https://github.com/erusev/parsedown-extra)
## Installation
Install the [composer package]:
    composer require erusev/parsedown
Or download the [latest release] and include `Parsedown.php`
[composer package]: https://packagist.org/packages/erusev/parsedown "The Parsedown package on packagist.org"
[latest release]: https://github.com/erusev/parsedown/releases/latest "The latest release of Parsedown"
## Example
```php
$Parsedown = new Parsedown();
echo $Parsedown->text('Hello _Parsedown_!'); # prints: <p>Hello <em>Parsedown</em>!</p>
```
You can also parse inline markdown only:
```php
echo $Parsedown->line('Hello _Parsedown_!'); # prints: Hello <em>Parsedown</em>!
```
More examples in [the wiki](https://github.com/erusev/parsedown/wiki/) and in [this video tutorial](http://youtu.be/wYZBY8DEikI).
## Security
Parsedown is capable of escaping user-input within the HTML that it generates. Additionally Parsedown will apply sanitisation to additional scripting vectors (such as scripting link destinations) that are introduced by the markdown syntax itself.
To tell Parsedown that it is processing untrusted user-input, use the following:
```php
$Parsedown->setSafeMode(true);
```
If instead, you wish to allow HTML within untrusted user-input, but still want output to be free from XSS it is recommended that you make use of a HTML sanitiser that allows HTML tags to be whitelisted, like [HTML Purifier](http://htmlpurifier.org/).
In both cases you should strongly consider employing defence-in-depth measures, like [deploying a Content-Security-Policy](https://scotthelme.co.uk/content-security-policy-an-introduction/) (a browser security feature) so that your page is likely to be safe even if an attacker finds a vulnerability in one of the first lines of defence above.
#### Security of Parsedown Extensions
Safe mode does not necessarily yield safe results when using extensions to Parsedown. Extensions should be evaluated on their own to determine their specific safety against XSS.
## Escaping HTML
> **WARNING:** This method isn't safe from XSS!
If you wish to escape HTML **in trusted input**, you can use the following:
```php
$Parsedown->setMarkupEscaped(true);
```
Beware that this still allows users to insert unsafe scripting vectors, such as links like `[xss](javascript:alert%281%29)`.
## Questions
**How does Parsedown work?**
It tries to read Markdown like a human. First, it looks at the lines. It’s interested in how the lines start. This helps it recognise blocks. It knows, for example, that if a line starts with a `-` then perhaps it belongs to a list. Once it recognises the blocks, it continues to the content. As it reads, it watches out for special characters. This helps it recognise inline elements (or inlines).
We call this approach "line based". We believe that Parsedown is the first Markdown parser to use it. Since the release of Parsedown, other developers have used the same approach to develop other Markdown parsers in PHP and in other languages.
**Is it compliant with CommonMark?**
It passes most of the CommonMark tests. Most of the tests that don't pass deal with cases that are quite uncommon. Still, as CommonMark matures, compliance should improve.
**Who uses it?**
[Laravel Framework](https://laravel.com/), [Bolt CMS](http://bolt.cm/), [Grav CMS](http://getgrav.org/), [Herbie CMS](http://www.getherbie.org/), [Kirby CMS](http://getkirby.com/), [October CMS](http://octobercms.com/), [Pico CMS](http://picocms.org), [Statamic CMS](http://www.statamic.com/), [phpDocumentor](http://www.phpdoc.org/), [RaspberryPi.org](http://www.raspberrypi.org/), [Symfony Demo](https://github.com/symfony/demo) and [more](https://packagist.org/packages/erusev/parsedown/dependents).
**How can I help?**
Use it, star it, share it and if you feel generous, [donate](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=528P3NZQMP8N2).
**What else should I know?**
I also make [Nota](https://nota.md/) — a writing app designed for Markdown files :)
## Parsedown Extension
A markdown extension for [parsedown](https://github.com/erusev/parsedown) , supports `[TOC]` syntax to generate table of contents.
## Installation
Include both `Parsedown.php` and `ParsedownExtension.php` or install [the composer package](https://packagist.org/packages/mrgeneral/parsedown-extension).
## Example
``` php
        $text = <<<EOL
[TOC]
# This is head 1
## This is head 1-1
### This is head 1-3
# Sample text of head 2
## Sample text of head 2-1
EOL;
        $content = ParsedownExtension::instance()
            ->setTocEnabled(true)
            ->text($text);
```
```html
<ul>
	<li><a href="#This+is+head+1">This is head 1</a>
	<ul>
		<li><a href="#This+is+head+1-1">This is head 1-1</a>
		<ul>
			<li><a href="#This+is+head+1-3">This is head 1-3</a></li>
		</ul>
		</li>
	</ul>
	</li>
	<li><a href="#This+is+head+2">This is head 2</a>
	<ul>
		<li><a href="#This+is+head+2-1">This is head 2-1</a></li>
	</ul>
	</li>
</ul>
<h1 id="This+is+head+1">This is head 1</h1>
<h2 id="This+is+head+1-1">This is head 1-1</h2>
<h3 id="This+is+head+1-3">This is head 1-3</h3>
<h1 id="This+is+head+2">This is head 2</h1>
<h2 id="This+is+head+2-1">This is head 2-1</h2>
```
## Reporting issues
 You can [create an issue](https://github.com/mrgeneralgoo/parsedown-extension/issues/new)

application/utils/ParsedownExtension.php

@@ -0,0 +1,83 @@
<?php
declare(strict_types=1);
namespace app\utils;
class ParsedownExtension extends \Parsedown
{
    protected $isTocEnabled = false;
    protected $rawTocList = [];
    protected $findTocSyntaxRule = '#^<p> *\[TOC\]\s*</p>$#m';
    public function setTocEnabled($isTocEnable)
    {
        $this->isTocEnabled = $isTocEnable;
        return $this;
    }
    public function setTocSyntaxRule($findTocSyntaxRule)
    {
        $this->findTocSyntaxRule = $findTocSyntaxRule;
        return $this;
    }
    public function text($text)
    {
        $content = parent::text($text);
        
        if (!$this->isTocEnabled || empty($this->rawTocList) || !preg_match($this->findTocSyntaxRule, $content)) {
            return ["toc"=>"","content"=>$content];
        }
        $content = preg_replace($this->findTocSyntaxRule, "", $content);
        return ["toc"=>$this->buildToc(), "content"=>$content];
    }
    protected function buildToc()
    {
        $tocMarkdownContent = '';
        $topHeadLevel       = min(array_column($this->rawTocList, 'level'));
        foreach ($this->rawTocList as $id => $tocItem) {
            $tocMarkdownContent .= sprintf('%s- [%s](#%s)' . PHP_EOL, str_repeat('  ', $tocItem['level'] - $topHeadLevel), $this->line($tocItem['text']), $tocItem['id']);
        }
        return parent::text($tocMarkdownContent);
    }
    protected function blockHeader($line)
    {
        $block = parent::blockHeader($line);
        $text  = $block['element']['handler']['argument'];
        $no = 0;
        foreach ($this->rawTocList as $key => $value) {
            if ($text == $value['text']) {
                $no = $value['no'] + 1;
            }
        }
        
        $id = urlencode($this->line($text));
        
        if ($no != 0) {
            $id .= '-' . $no;
        }
        
        $block['element']['attributes'] = [
            'id' => $id,
        ];
        $this->rawTocList[] = [
            'id' => $id,
            'text'  => $text,
            'level' => str_replace('h', '', $block['element']['name']),
            'no'=> $no,
        ];
        return $block;
    }
}