Browse Source

New function to convert bbcode to markdown.

Michael Vogel 9 years ago
10 changed files with 2939 additions and 19 deletions
  1. +25
  2. +4
  3. +504
  4. +29
  5. +51
  6. +1184
  7. +33
  8. +489
  9. +618
  10. +2

+ 25
- 14
include/bb2diaspora.php View File

@ -1,10 +1,11 @@
// we don't want to support a bbcode specific markdown interpreter
// and the markdown library we have is pretty good, but provides HTML output.
@ -78,13 +79,23 @@ function bb2diaspora($Text,$preserve_nl = false) {
$Text = str_replace(">", "&gt;", $Text);
// If we find any event code, turn it into an event.
// After we're finished processing the bbcode we'll
// After we're finished processing the bbcode we'll
// replace all of the event code with a reformatted version.
$Text = str_replace(array("\n","\r"), array('',''),$Text);
// Convert it to HTML
$Text = bbcode($Text);
// Now convert HTML to Markdown
$md = new Markdownify(false, false, false);
$Text = $md->parseString($Text);
// Remove all unconverted tags
$Text = strip_tags($Text);
// Set up the parameters for a URL search string
$URLSearchString = "^\[\]";
// Set up the parameters for a MAIL search string
@ -98,7 +109,7 @@ function bb2diaspora($Text,$preserve_nl = false) {
// new javascript markdown processor to handle links with images as the link "text"
// It is not optimal and may be removed if this ability is restored in the future
$Text = preg_replace("/\[url\=([$URLSearchString]*)\]\[img\](.*?)\[\/img\]\[\/url\]/ism",
$Text = preg_replace("/\[url\=([$URLSearchString]*)\]\[img\](.*?)\[\/img\]\[\/url\]/ism",
'![' . t('image/photo') . '](' . '$2' . ')' . "\n" . '[' . t('link') . '](' . '$1' . ')', $Text);
$Text = preg_replace("/\[bookmark\]([$URLSearchString]*)\[\/bookmark\]/ism", '[$1]($1)', $Text);
@ -115,7 +126,7 @@ function bb2diaspora($Text,$preserve_nl = false) {
// Perform MAIL Search
$Text = preg_replace("(\[mail\]([$MAILSearchString]*)\[/mail\])", '[$1](mailto:$1)', $Text);
$Text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '[$2](mailto:$1)', $Text);
$Text = str_replace('*', '\\*', $Text);
$Text = str_replace('_', '\\_', $Text);
@ -158,7 +169,7 @@ function bb2diaspora($Text,$preserve_nl = false) {
// $Text = preg_replace("/\[table border=1\](.*?)\[\/table\]/s", '<table border="1" >$1</table>' ,$Text);
// $Text = preg_replace("/\[table border=0\](.*?)\[\/table\]/s", '<table border="0" >$1</table>' ,$Text);
// $Text = str_replace("[*]", "<li>", $Text);
// Check for font change text
@ -174,10 +185,10 @@ function bb2diaspora($Text,$preserve_nl = false) {
// Declare the format for [quote] layout
// $QuoteLayout = '<blockquote>$1</blockquote>';
// $QuoteLayout = '<blockquote>$1</blockquote>';
// Check for [quote] text
$Text = preg_replace("/\[quote\](.*?)\[\/quote\]/is",">$1\n\n", $Text);
// Images
// html5 video and audio
@ -187,7 +198,7 @@ function bb2diaspora($Text,$preserve_nl = false) {
$Text = preg_replace("/\[audio\](.*?)\[\/audio\]/", '$1', $Text);
// $Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/", '<iframe src="$1" width="425" height="350"><a href="$1">$1</a></iframe>', $Text);
// [img=widthxheight]image source[/img]
// $Text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/", '<img src="$3" style="height:{$2}px; width:{$1}px;" >', $Text);
@ -211,7 +222,7 @@ function bb2diaspora($Text,$preserve_nl = false) {
if(x($ev,'desc') && x($ev,'start')) {
$sub = format_event_diaspora($ev);
$Text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/is",$sub,$Text);
$Text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/is",'',$Text);
$Text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/is",'',$Text);
@ -222,7 +233,7 @@ function bb2diaspora($Text,$preserve_nl = false) {
$Text = preg_replace("/\<(.*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism",'<$1$2=$3&$4>',$Text);
$Text = preg_replace_callback('/\[(.*?)\]\((.*?)\)/ism','unescape_underscores_in_links',$Text);
return $Text;

+ 4
- 4
include/diaspora.php View File

@ -2060,12 +2060,12 @@ function diaspora_send_status($item,$owner,$contact,$public_batch = false) {
$images[] = $detail;
$body = str_replace($detail['str'],$mtch[1],$body);
$body = xmlify(html_entity_decode(bb2diaspora($body)));
$body = xmlify('**' . html_entity_decode($title) . '**' . "\n") . $body;
$body = "[b]".html_entity_decode($title)."[/b]\n\n".$body;
$body = xmlify(html_entity_decode(bb2diaspora($body)));
if($item['attach']) {

+ 504
- 0
include/markdownify/LICENSE_LGPL.txt View File

@ -0,0 +1,504 @@
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+ 29
- 0
include/markdownify/TODO View File

@ -0,0 +1,29 @@
* handle non-markdownifiable lists (i.e. `<ul><li id="foobar">asdf</li></ul>`)
* organize methods better (i.e. flushlinebreaks & setlinebreaks close to each other)
* take a look at function names etc.
* is the new (in rev. 93) lastclosedtag property needed?
* word wrapping (some work is done but it's still very buggy)
Markdownify Extra
* handle table alignment with KEEP_HTML=false
* handle tables without headings when KEEP_HTML=false is set
* handle Markdown inside non-markdownable tags
Implementation Thoughts
* non-markdownifiable lists and markdown inside non-markdownable tags as well as the current
table implementation could be rewritten by using a rollback mechanism.
<ul><li>asdf</li><li id="foobar">asdf</li></ul>
we come to `<ul>`, know that this might fail and create a snapshot of our current parser
we keep on parsing and when we reach `<li id="foobar">` we gotta rollback and keep this
list in HTML format.

+ 51
- 0
include/markdownify/example.php View File

@ -0,0 +1,51 @@
if (!empty($_POST['input'])) {
include 'markdownify_extra.php';
if (!isset($_POST['leap'])) {
} else {
$leap = $_POST['leap'];
if (!isset($_POST['keepHTML'])) {
$keephtml = MDFY_KEEPHTML;
} else {
$keephtml = $_POST['keepHTML'];
if (!empty($_POST['extra'])) {
$md = new Markdownify_Extra($leap, MDFY_BODYWIDTH, $keephtml);
} else {
$md = new Markdownify($leap, MDFY_BODYWIDTH, $keephtml);
if (ini_get('magic_quotes_gpc')) {
$_POST['input'] = stripslashes($_POST['input']);
$output = $md->parseString($_POST['input']);
} else {
$_POST['input'] = '';
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "">
<html xmlns="" xml:lang="en-US" lang="en-US">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>HTML to Markdown Converter</title>
<?php if (empty($_POST['input'])): ?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<legend>HTML Input</legend>
<textarea style="width:100%;" cols="85" rows="40" name="input"><?php echo htmlspecialchars($_POST['input'], ENT_NOQUOTES, 'UTF-8'); ?></textarea>
<label for="extra">Markdownify Extra: <input name="extra" checked="checked" id="extra" type="checkbox" value="1" /></label>
<label for="leap">Links after each block elem: <input name="leap" id="leap" type="checkbox" value="1" /></label>
<label for="keepHTML">keep HTML: <input name="keepHTML" id="keepHTML" type="checkbox" value="1" checked="checked" /></label>
<input type="submit" name="submit" value="submit" />
<?php else: ?>
<h1 style="text-align:right;"><a href="<?php echo $_SERVER['PHP_SELF']; ?>">BACK</a></h1>
<pre><?php echo htmlspecialchars($output, ENT_NOQUOTES, 'UTF-8'); ?></pre>
<?php endif; ?>

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- 0
include/markdownify/markdownify_cli.php View File

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require dirname(__FILE__) .'/markdownify_extra.php';
function param($name, $default = false) {
if (!in_array('--'.$name, $_SERVER['argv']))
return $default;
while (each($_SERVER['argv'])) {
if (current($_SERVER['argv']) == '--'.$name)
$value = next($_SERVER['argv']);
if ($value === false || substr($value, 0, 2) == '--')
return true;
return $value;
$input = stream_get_contents(STDIN);
$linksAfterEachParagraph = param('links');
$bodyWidth = param('width');
$keepHTML = param('html', true);
if (param('no_extra')) {
$parser = new Markdownify($linksAfterEachParagraph, $bodyWidth, $keepHTML);
} else {
$parser = new Markdownify_Extra($linksAfterEachParagraph, $bodyWidth, $keepHTML);
echo $parser->parseString($input) ."\n";

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include/markdownify/markdownify_extra.php View File

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* Class to convert HTML to Markdown with PHP Markdown Extra syntax support.
* @version 1.0.0 alpha
* @author Milian Wolff (<>, <>)
* @license LGPL, see LICENSE_LGPL.txt and the summary below
* @copyright (C) 2007 Milian Wolff
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* standard Markdownify class
require_once dirname(__FILE__).'/markdownify.php';
class Markdownify_Extra extends Markdownify {
* table data, including rows with content and the maximum width of each col
* @var array
var $table = array();
* current col
* @var int
var $col = -1;
* current row
* @var int
var $row = 0;
* constructor, see Markdownify::Markdownify() for more information
function Markdownify_Extra($linksAfterEachParagraph = MDFY_LINKS_EACH_PARAGRAPH, $bodyWidth = MDFY_BODYWIDTH, $keepHTML = MDFY_KEEPHTML) {
parent::Markdownify($linksAfterEachParagraph, $bodyWidth, $keepHTML);
### new markdownable tags & attributes
# header ids: # foo {bar}
$this->isMarkdownable['h1']['id'] = 'optional';
$this->isMarkdownable['h2']['id'] = 'optional';
$this->isMarkdownable['h3']['id'] = 'optional';
$this->isMarkdownable['h4']['id'] = 'optional';
$this->isMarkdownable['h5']['id'] = 'optional';
$this->isMarkdownable['h6']['id'] = 'optional';
# tables
$this->isMarkdownable['table'] = array();
$this->isMarkdownable['th'] = array(
'align' => 'optional',
$this->isMarkdownable['td'] = array(
'align' => 'optional',
$this->isMarkdownable['tr'] = array();
array_push($this->ignore, 'thead');
array_push($this->ignore, 'tbody');
array_push($this->ignore, 'tfoot');
# definition lists
$this->isMarkdownable['dl'] = array();
$this->isMarkdownable['dd'] = array();
$this->isMarkdownable['dt'] = array();
# footnotes
$this->isMarkdownable['fnref'] = array(
'target' => 'required',
$this->isMarkdownable['footnotes'] = array();
$this->isMarkdownable['fn'] = array(
'name' => 'required',
$this->parser->blockElements['fnref'] = false;
$this->parser->blockElements['fn'] = true;
$this->parser->blockElements['footnotes'] = true;
# abbr
$this->isMarkdownable['abbr'] = array(
'title' => 'required',
# build RegEx lookahead to decide wether table can pe parsed or not
$inlineTags = array_keys($this->parser->blockElements, false);
$colContents = '(?:[^<]|<(?:'.implode('|', $inlineTags).'|[^a-z]))+';
$this->tableLookaheadHeader = '{
^\s*(?:<thead\s*>)?\s* # open optional thead
<tr\s*>\s*(?: # start required row with headers
<th(?:\s+align=("|\')(?:left|center|right)\1)?\s*> # header with optional align
\s*'.$colContents.'\s* # contents
</th>\s* # close header
)+</tr> # close row with headers
\s*(?:</thead>)? # close optional thead
$this->tdSubstitute = '\s*'.$colContents.'\s* # contents
$this->tableLookaheadBody = '{
\s*(?:<tbody\s*>)?\s* # open optional tbody
(?:<tr\s*>\s* # start row
%s # cols to be substituted
</tr>)+ # close row
\s*(?:</tbody>)? # close optional tbody
\s*</table> # close table
* handle header tags (<h1> - <h6>)
* @param int $level 1-6
* @return void
function handleHeader($level) {
static $id = null;
if ($this->parser->isStartTag) {
if (isset($this->parser->tagAttributes['id'])) {
$id = $this->parser->tagAttributes['id'];
} else {
if (!is_null($id)) {
$this->out(' {#'.$id.'}');
$id = null;
* handle <abbr> tags
* @param void
* @return void
function handleTag_abbr() {
if ($this->parser->isStartTag) {
} else {
$tag = $this->unstack();
$tag['text'] = $this->unbuffer();
$add = true;
foreach ($this->stack['abbr'] as $stacked) {
if ($stacked['text'] == $tag['text']) {
/** TODO: differing abbr definitions, i.e. different titles for same text **/
$add = false;
if ($add) {
array_push($this->stack['abbr'], $tag);
* flush stacked abbr tags
* @param void
* @return void
function flushStacked_abbr() {
$out = array();
foreach ($this->stack['abbr'] as $k => $tag) {
if (!isset($tag['unstacked'])) {
array_push($out, ' *['.$tag['text'].']: '.$tag['title']);
$tag['unstacked'] = true;
$this->stack['abbr'][$k] = $tag;
if (!empty($out)) {
$this->out("\n\n".implode("\n", $out));
* handle <table> tags
* @param void
* @return void
function handleTag_table() {
if ($this->parser->isStartTag) {
# check if upcoming table can be converted
if ($this->keepHTML) {
if (preg_match($this->tableLookaheadHeader, $this->parser->html, $matches)) {
# header seems good, now check body
# get align & number of cols
preg_match_all('#<th(?:\s+align=("|\')(left|right|center)\1)?\s*>#si', $matches[0], $cols);
$regEx = '';
$i = 1;
$aligns = array();
foreach ($cols[2] as $align) {
$align = strtolower($align);
array_push($aligns, $align);
if (empty($align)) {
$align = 'left'; # default value
$td = '\s+align=("|\')'.$align.'\\'.$i;
if ($align == 'left') {
# look for empty align or left
$td = '(?:'.$td.')?';
$td = '<td'.$td.'\s*>';
$regEx .= $td.$this->tdSubstitute;
$regEx = sprintf($this->tableLookaheadBody, $regEx);
if (preg_match($regEx, $this->parser->html, $matches, null, strlen($matches[0]))) {
# this is a markdownable table tag!
$this->table = array(
'rows' => array(),
'col_widths' => array(),
'aligns' => $aligns,
$this->row = 0;
} else {
# non markdownable table
} else {
# non markdownable table
} else {
$this->table = array(
'rows' => array(),
'col_widths' => array(),
'aligns' => array(),
$this->row = 0;
} else {
# finally build the table in Markdown Extra syntax
$separator = array();
# seperator with correct align identifikators
foreach($this->table['aligns'] as $col => $align) {
if (!$this->keepHTML && !isset($this->table['col_widths'][$col])) {
$left = ' ';
$right = ' ';
switch ($align) {
case 'left':
$left = ':';
case 'center':
$right = ':';
$left = ':';
case 'right':
$right = ':';
array_push($separator, $left.str_repeat('-', $this->table['col_widths'][$col]).$right);
$separator = '|'.implode('|', $separator).'|';
$rows = array();
# add padding
array_walk_recursive($this->table['rows'], array(&$this, 'alignTdContent'));
$header = array_shift($this->table['rows']);
array_push($rows, '| '.implode(' | ', $header).' |');
array_push($rows, $separator);
foreach ($this->table['rows'] as $row) {
array_push($rows, '| '.implode(' | ', $row).' |');
$this->out(implode("\n".$this->indent, $rows));
$this->table = array();
* properly pad content so it is aligned as whished
* should be used with array_walk_recursive on $this->table['rows']
* @param string &$content
* @param int $col
* @return void
function alignTdContent(&$content, $col) {
switch ($this->table['aligns'][$col]) {
case 'left':
$content .= str_repeat(' ', $this->table['col_widths'][$col] - $this->strlen($content));
case 'right':
$content = str_repeat(' ', $this->table['col_widths'][$col] - $this->strlen($content)).$content;
case 'center':
$paddingNeeded = $this->table['col_widths'][$col] - $this->strlen($content);
$left = floor($paddingNeeded / 2);
$right = $paddingNeeded - $left;
$content = str_repeat(' ', $left).$content.str_repeat(' ', $right);
* handle <tr> tags
* @param void
* @return void
function handleTag_tr() {
if ($this->parser->isStartTag) {
$this->col = -1;
} else {
* handle <td> tags
* @param void
* @return void
function handleTag_td() {
if ($this->parser->isStartTag) {
if (!isset($this->table['col_widths'][$this->col])) {
$this->table['col_widths'][$this->col] = 0;
} else {
$buffer = trim($this->unbuffer());
$this->table['col_widths'][$this->col] = max($this->table['col_widths'][$this->col], $this->strlen($buffer));
$this->table['rows'][$this->row][$this->col] = $buffer;
* handle <th> tags
* @param void
* @return void
function handleTag_th() {
if (!$this->keepHTML && !isset($this->table['rows'][1]) && !isset($this->table['aligns'][$this->col+1])) {
if (isset($this->parser->tagAttributes['align'])) {
$this->table['aligns'][$this->col+1] = $this->parser->tagAttributes['align'];
} else {
$this->table['aligns'][$this->col+1] = '';
* handle <dl> tags
* @param void
* @return void
function handleTag_dl() {
if (!$this->parser->isStartTag) {
* handle <dt> tags
* @param void
* @return void
function handleTag_dt() {
if (!$this->parser->isStartTag) {
* handle <dd> tags
* @param void
* @return void
function handleTag_dd() {
if ($this->parser->isStartTag) {
if (substr(ltrim($this->parser->html), 0, 3) == '<p>') {
# next comes a paragraph, so we'll need an extra line
} elseif (substr($this->output, -2) == "\n\n") {
$this->output = substr($this->output, 0, -1);
$this->out(': ');
$this->indent(' ', false);
} else {
# lookahead for next dt
if (substr(ltrim($this->parser->html), 0, 4) == '<dt>') {
} else {
$this->indent(' ');
* handle <fnref /> tags (custom footnote references, see markdownify_extra::parseString())
* @param void
* @return void
function handleTag_fnref() {
* handle <fn> tags (custom footnotes, see markdownify_extra::parseString()
* and markdownify_extra::_makeFootnotes())
* @param void
* @return void
function handleTag_fn() {
if ($this->parser->isStartTag) {
} else {
$this->indent(' ');
* handle <footnotes> tag (custom footnotes, see markdownify_extra::parseString()
* and markdownify_extra::_makeFootnotes())
* @param void
* @return void
function handleTag_footnotes() {
if (!$this->parser->isStartTag) {
* parse a HTML string, clean up footnotes prior
* @param string $HTML input
* @return string Markdown formatted output
function parseString($html) {
/** TODO: custom markdown-extra options, e.g. titles & classes **/
# <sup id="fnref:..."><a href"#fn..." rel="footnote">...</a></sup>
# => <fnref target="..." />
$html = preg_replace('@<sup id="fnref:([^"]+)">\s*<a href="#fn:\1" rel="footnote">\s*\d+\s*</a>\s*</sup>@Us', '<fnref target="$1" />', $html);
# <div class="footnotes">
# <hr />
# <ol>
# <li id="fn:...">...</li>
# ...
# </ol>
# </div>
# =>
# <footnotes>
# <fn name="...">...</fn>
# ...
# </footnotes>
$html = preg_replace_callback('#<div class="footnotes">\s*<hr />\s*<ol>\s*(.+)\s*</ol>\s*</div>#Us', array(&$this, '_makeFootnotes'), $html);
return parent::parseString($html);
* replace HTML representation of footnotes with something more easily parsable
* @note this is a callback to be used in parseString()
* @param array $matches
* @return string
function _makeFootnotes($matches) {
# <li id="fn:1">
# ...
# <a href="#fnref:block" rev="footnote">&#8617;</a></p>
# </li>
# => <fn name="1">...</fn>
# remove footnote link
$fns = preg_replace('@\s*(&#160;\s*)?<a href="#fnref:[^"]+" rev="footnote"[^>]*>&#8617;</a>\s*@s', '', $matches[1]);
# remove empty paragraph
$fns = preg_replace('@<p>\s*</p>@s', '', $fns);
# <li id="fn:1">...</li> -> <footnote nr="1">...</footnote>
$fns = str_replace('<li id="fn:', '<fn name="', $fns);
$fns = '<footnotes>'.$fns.'</footnotes>';
return preg_replace('#</li>\s*(?=(?:<fn|</footnotes>))#s', '</fn>$1', $fns);

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include/markdownify/parsehtml/parsehtml.php View File

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* parseHTML is a HTML parser which works with PHP 4 and above.
* It tries to handle invalid HTML to some degree.
* @version 1.0 beta
* @author Milian Wolff (,
* @license LGPL, see LICENSE_LGPL.txt and the summary below
* @copyright (C) 2007 Milian Wolff
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
class parseHTML {
* tags which are always empty (<br /> etc.)
* @var array<string>
var $emptyTags = array(
* tags with preformatted text
* whitespaces wont be touched in them
* @var array<string>
var $preformattedTags = array(
* supress HTML tags inside preformatted tags (see above)
* @var bool
var $noTagsInCode = false;
* html to be parsed
* @var string
var $html = '';
* node type:
* - tag (see isStartTag)
* - text (includes cdata)
* - comment
* - doctype
* - pi (processing instruction)
* @var string
var $nodeType = '';
* current node content, i.e. either a
* simple string (text node), or something like
* <tag attrib="value"...>
* @var string
var $node = '';
* wether current node is an opening tag (<a>) or not (</a>)
* set to NULL if current node is not a tag
* NOTE: empty tags (<br />) set this to true as well!
* @var bool | null
var $isStartTag = null;
* wether current node is an empty tag (<br />) or not (<a></a>)
* @var bool | null
var $isEmptyTag = null;
* tag name
* @var string | null
var $tagName = '';
* attributes of current tag
* @var array (attribName=>value) | null
var $tagAttributes = null;
* wether the current tag is a block element
* @var bool | null
var $isBlockElement = null;
* keep whitespace
* @var int
var $keepWhitespace = 0;
* list of open tags
* count this to get current depth
* @var array
var $openTags = array();
* list of block elements
* @var array
* TODO: what shall we do with <del> and <ins> ?!
var $blockElements = array (
# tag name => <bool> is block
# block elements
'address' => true,
'blockquote' => true,
'center' => true,
'del' => true,
'dir' => true,
'div' => true,
'dl' => true,
'fieldset' => true,
'form' => true,
'h1' => true,
'h2' => true,
'h3' => true,
'h4' => true,
'h5' => true,
'h6' => true,
'hr' => true,
'ins' => true,
'isindex' => true,
'menu' => true,
'noframes' => true,
'noscript' => true,
'ol' => true,
'p' => true,
'pre' => true,
'table' => true,
'ul' => true,
# set table elements and list items to block as well
'thead' => true,
'tbody' => true,
'tfoot' => true,
'td' => true,
'tr' => true,
'th' => true,
'li' => true,
'dd' => true,
'dt' => true,
# header items and html / body as well
'html' => true,
'body' => true,
'head' => true,
'meta' => true,
'link' => true,
'style' => true,
'title' => true,
# unfancy media tags, when indented should be rendered as block
'map' => true,
'object' => true,
'param' => true,
'embed' => true,
'area' => true,
# inline elements
'a' => false,
'abbr' => false,
'acronym' => false,
'applet' => false,
'b' => false,
'basefont' => false,
'bdo' => false,
'big' => false,
'br' => false,
'button' => false,
'cite' => false,
'code' => false,
'del' => false,
'dfn' => false,
'em' => false,
'font' => false,
'i' => false,
'img' => false,
'ins' => false,
'input' => false,
'iframe' => false,
'kbd' => false,
'label' => false,
'q' => false,
'samp' => false,
'script' => false,
'select' => false,
'small' => false,
'span' => false,
'strong' => false,
'sub' => false,
'sup' => false,
'textarea' => false,
'tt' => false,
'var' => false,
* get next node, set $this->html prior!
* @param void
* @return bool
function nextNode() {
if (empty($this->html)) {
# we are done with parsing the html string
return false;
static $skipWhitespace = true;
if ($this->isStartTag && !$this->isEmptyTag) {
array_push($this->openTags, $this->tagName);
if (in_array($this->tagName, $this->preformattedTags)) {
# dont truncate whitespaces for <code> or <pre> contents
if ($this->html[0] == '<') {
$token = substr($this->html, 0, 9);
if (substr($token, 0, 2) == '<?') {
# xml prolog or other pi's
/** TODO **/
#trigger_error('this might need some work', E_USER_NOTICE);
$pos = strpos($this->html, '>');
$this->setNode('pi', $pos + 1);
return true;
if (substr($token, 0, 4) == '<!--') {
# comment
$pos = strpos($this->html, '-->');
if ($pos === false) {
# could not find a closing -->, use next gt instead
# this is firefox' behaviour
$pos = strpos($this->html, '>') + 1;
} else {
$pos += 3;
$this->setNode('comment', $pos);
$skipWhitespace = true;
return true;
if ($token == '<!DOCTYPE') {
# doctype
$this->setNode('doctype', strpos($this->html, '>')+1);
$skipWhitespace = true;
return true;
if ($token == '<![CDATA[') {
# cdata, use text node
# remove leading <![CDATA[
$this->html = substr($this->html, 9);
$this->setNode('text', strpos($this->html, ']]>')+3);
# remove trailing ]]> and trim
$this->node = substr($this->node, 0, -3);
$skipWhitespace = true;
return true;
if ($this->parseTag()) {
# seems to be a tag
# handle whitespaces
if ($this->isBlockElement) {
$skipWhitespace = true;
} else {
$skipWhitespace = false;
return true;
if ($this->keepWhitespace) {
$skipWhitespace = false;
# when we get here it seems to be a text node
$pos = strpos($this->html, '<');
if ($pos === false) {
$pos = strlen($this->html);
$this->setNode('text', $pos);
if ($skipWhitespace && $this->node == ' ') {
return $this->nextNode();
$skipWhitespace = false;
return true;
* parse tag, set tag name and attributes, see if it's a closing tag and so forth...
* @param void
* @return bool
function parseTag() {
static $a_ord, $z_ord, $special_ords;
if (!isset($a_ord)) {
$a_ord = ord('a');
$z_ord = ord('z');
$special_ords = array(
ord(':'), // for xml:lang
ord('-'), // for http-equiv
$tagName = '';
$pos = 1;
$isStartTag = $this->html[$pos] != '/';
if (!$isStartTag) {
# get tagName
while (isset($this->html[$pos])) {
$pos_ord = ord(strtolower($this->html[$pos]));
if (($pos_ord >= $a_ord && $pos_ord <= $z_ord) || (!empty($tagName) && is_numeric($this->html[$pos]))) {
$tagName .= $this->html[$pos];
} else {
$tagName = strtolower($tagName);
if (empty($tagName) || !isset($this->blockElements[$tagName])) {
# something went wrong => invalid tag
return false;
if ($this->noTagsInCode && end($this->openTags) == 'code' && !($tagName == 'code' && !$isStartTag)) {
# we supress all HTML tags inside code tags
return false;
# get tag attributes
/** TODO: in html 4 attributes do not need to be quoted **/
$isEmptyTag = false;
$attributes = array();
$currAttrib = '';
while (isset($this->html[$pos+1])) {
# close tag
if ($this->html[$pos] == '>' || $this->html[$pos].$this->html[$pos+1] == '/>') {
if ($this->html[$pos] == '/') {
$isEmptyTag = true;
$pos_ord = ord(strtolower($this->html[$pos]));
if ( ($pos_ord >= $a_ord && $pos_ord <= $z_ord) || in_array($pos_ord, $special_ords)) {
# attribute name
$currAttrib .= $this->html[$pos];
} elseif (in_array($this->html[$pos], array(' ', "\t", "\n"))) {
# drop whitespace
} elseif (in_array($this->html[$pos].$this->html[$pos+1], array('="', "='"))) {
# get attribute value
$await = $this->html[$pos]; # single or double quote
$value = '';
while (isset($this->html[$pos]) && $this->html[$pos] != $await) {
$value .= $this->html[$pos];
$attributes[$currAttrib] = $value;
$currAttrib = '';
} else {
return false;
if ($this->html[$pos] != '>') {
return false;
if (!empty($currAttrib)) {
# html 4 allows something like <option selected> instead of <option selected="selected">
$attributes[$currAttrib] = $currAttrib;
if (!$isStartTag) {
if (!empty($attributes) || $tagName != end($this->openTags)) {
# end tags must not contain any attributes
# or maybe we did not expect a different tag to be closed
return false;
if (in_array($tagName, $this->preformattedTags)) {
$this->node = substr($this->html, 0, $pos);
$this->html = substr($this->html, $pos);
$this->tagName = $tagName;
$this->tagAttributes = $attributes;
$this->isStartTag = $isStartTag;
$this->isEmptyTag = $isEmptyTag || in_array($tagName, $this->emptyTags);
if ($this->isEmptyTag) {
# might be not well formed
$this->node = preg_replace('# */? *>$#', ' />', $this->node);
$this->nodeType = 'tag';
$this->isBlockElement = $this->blockElements[$tagName];
return true;
* handle invalid tags
* @param void
* @return void
function invalidTag() {
$this->html = substr_replace($this->html, '&lt;', 0, 1);
* update all vars and make $this->html shorter
* @param string $type see description for $this->nodeType
* @param int $pos to which position shall we cut?
* @return void
function setNode($type, $pos) {
if ($this->nodeType == 'tag') {
# set tag specific vars to null
# $type == tag should not be called here
# see this::parseTag() for more
$this->tagName = null;