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							<?php

/**

 * Experimental HTML5-based parser using Jeroen van der Meer's PH5P library.

 * Occupies space in the HTML5 pseudo-namespace, which may cause conflicts.

 *

 * @note

 *    Recent changes to PHP's DOM extension have resulted in some fatal

 *    error conditions with the original version of PH5P. Pending changes,

 *    this lexer will punt to DirectLex if DOM throws an exception.

 */

class HTMLPurifier_Lexer_PH5P extends HTMLPurifier_Lexer_DOMLex

{
    /**

     * @param string $html

     * @param HTMLPurifier_Config $config

     * @param HTMLPurifier_Context $context

     * @return HTMLPurifier_Token[]

     */
    public function tokenizeHTML($html, $config, $context)

    {
        $new_html = $this->normalize($html, $config, $context);
        $new_html = $this->wrapHTML($new_html, $config, $context, false /* no div */);
        try {
            $parser = new HTML5($new_html);
            $doc = $parser->save();
        } catch (DOMException $e) {
            // Uh oh, it failed. Punt to DirectLex.
            $lexer = new HTMLPurifier_Lexer_DirectLex();
            $context->register('PH5PError', $e); // save the error, so we can detect it
            return $lexer->tokenizeHTML($html, $config, $context); // use original HTML
        }
        $tokens = array();
        $this->tokenizeDOM(
            $doc->getElementsByTagName('html')->item(0)-> // <html>
                  getElementsByTagName('body')->item(0) //   <body>
            ,
            $tokens, $config
        );
        return $tokens;
    }
}

/*


Copyright 2007 Jeroen van der Meer <http://jero.net/>


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.


*/

class HTML5

{
    private $data;
    private $char;
    private $EOF;
    private $state;
    private $tree;
    private $token;
    private $content_model;
    private $escape = false;
    private $entities = array(
        'AElig;',
        'AElig',
        'AMP;',
        'AMP',
        'Aacute;',
        'Aacute',
        'Acirc;',
        'Acirc',
        'Agrave;',
        'Agrave',
        'Alpha;',
        'Aring;',
        'Aring',
        'Atilde;',
        'Atilde',
        'Auml;',
        'Auml',
        'Beta;',
        'COPY;',
        'COPY',
        'Ccedil;',
        'Ccedil',
        'Chi;',
        'Dagger;',
        'Delta;',
        'ETH;',
        'ETH',
        'Eacute;',
        'Eacute',
        'Ecirc;',
        'Ecirc',
        'Egrave;',
        'Egrave',
        'Epsilon;',
        'Eta;',
        'Euml;',
        'Euml',
        'GT;',
        'GT',
        'Gamma;',
        'Iacute;',
        'Iacute',
        'Icirc;',
        'Icirc',
        'Igrave;',
        'Igrave',
        'Iota;',
        'Iuml;',
        'Iuml',
        'Kappa;',
        'LT;',
        'LT',
        'Lambda;',
        'Mu;',
        'Ntilde;',
        'Ntilde',
        'Nu;',
        'OElig;',
        'Oacute;',
        'Oacute',
        'Ocirc;',
        'Ocirc',
        'Ograve;',
        'Ograve',
        'Omega;',
        'Omicron;',
        'Oslash;',
        'Oslash',
        'Otilde;',
        'Otilde',
        'Ouml;',
        'Ouml',
        'Phi;',
        'Pi;',
        'Prime;',
        'Psi;',
        'QUOT;',
        'QUOT',
        'REG;',
        'REG',
        'Rho;',
        'Scaron;',
        'Sigma;',
        'THORN;',
        'THORN',
        'TRADE;',
        'Tau;',
        'Theta;',
        'Uacute;',
        'Uacute',
        'Ucirc;',
        'Ucirc',
        'Ugrave;',
        'Ugrave',
        'Upsilon;',
        'Uuml;',
        'Uuml',
        'Xi;',
        'Yacute;',
        'Yacute',
        'Yuml;',
        'Zeta;',
        'aacute;',
        'aacute',
        'acirc;',
        'acirc',
        'acute;',
        'acute',
        'aelig;',
        'aelig',
        'agrave;',
        'agrave',
        'alefsym;',
        'alpha;',
        'amp;',
        'amp',
        'and;',
        'ang;',
        'apos;',
        'aring;',
        'aring',
        'asymp;',
        'atilde;',
        'atilde',
        'auml;',
        'auml',
        'bdquo;',
        'beta;',
        'brvbar;',
        'brvbar',
        'bull;',
        'cap;',
        'ccedil;',
        'ccedil',
        'cedil;',
        'cedil',
        'cent;',
        'cent',
        'chi;',
        'circ;',
        'clubs;',
        'cong;',
        'copy;',
        'copy',
        'crarr;',
        'cup;',
        'curren;',
        'curren',
        'dArr;',
        'dagger;',
        'darr;',
        'deg;',
        'deg',
        'delta;',
        'diams;',
        'divide;',
        'divide',
        'eacute;',
        'eacute',
        'ecirc;',
        'ecirc',
        'egrave;',
        'egrave',
        'empty;',
        'emsp;',
        'ensp;',
        'epsilon;',
        'equiv;',
        'eta;',
        'eth;',
        'eth',
        'euml;',
        'euml',
        'euro;',
        'exist;',
        'fnof;',
        'forall;',
        'frac12;',
        'frac12',
        'frac14;',
        'frac14',
        'frac34;',
        'frac34',
        'frasl;',
        'gamma;',
        'ge;',
        'gt;',
        'gt',
        'hArr;',
        'harr;',
        'hearts;',
        'hellip;',
        'iacute;',
        'iacute',
        'icirc;',
        'icirc',
        'iexcl;',
        'iexcl',
        'igrave;',
        'igrave',
        'image;',
        'infin;',
        'int;',
        'iota;',
        'iquest;',
        'iquest',
        'isin;',
        'iuml;',
        'iuml',
        'kappa;',
        'lArr;',
        'lambda;',
        'lang;',
        'laquo;',
        'laquo',
        'larr;',
        'lceil;',
        'ldquo;',
        'le;',
        'lfloor;',
        'lowast;',
        'loz;',
        'lrm;',
        'lsaquo;',
        'lsquo;',
        'lt;',
        'lt',
        'macr;',
        'macr',
        'mdash;',
        'micro;',
        'micro',
        'middot;',
        'middot',
        'minus;',
        'mu;',
        'nabla;',
        'nbsp;',
        'nbsp',
        'ndash;',
        'ne;',
        'ni;',
        'not;',
        'not',
        'notin;',
        'nsub;',
        'ntilde;',
        'ntilde',
        'nu;',
        'oacute;',
        'oacute',
        'ocirc;',
        'ocirc',
        'oelig;',
        'ograve;',
        'ograve',
        'oline;',
        'omega;',
        'omicron;',
        'oplus;',
        'or;',
        'ordf;',
        'ordf',
        'ordm;',
        'ordm',
        'oslash;',
        'oslash',
        'otilde;',
        'otilde',
        'otimes;',
        'ouml;',
        'ouml',
        'para;',
        'para',
        'part;',
        'permil;',
        'perp;',
        'phi;',
        'pi;',
        'piv;',
        'plusmn;',
        'plusmn',
        'pound;',
        'pound',
        'prime;',
        'prod;',
        'prop;',
        'psi;',
        'quot;',
        'quot',
        'rArr;',
        'radic;',
        'rang;',
        'raquo;',
        'raquo',
        'rarr;',
        'rceil;',
        'rdquo;',
        'real;',
        'reg;',
        'reg',
        'rfloor;',
        'rho;',
        'rlm;',
        'rsaquo;',
        'rsquo;',
        'sbquo;',
        'scaron;',
        'sdot;',
        'sect;',
        'sect',
        'shy;',
        'shy',
        'sigma;',
        'sigmaf;',
        'sim;',
        'spades;',
        'sub;',
        'sube;',
        'sum;',
        'sup1;',
        'sup1',
        'sup2;',
        'sup2',
        'sup3;',
        'sup3',
        'sup;',
        'supe;',
        'szlig;',
        'szlig',
        'tau;',
        'there4;',
        'theta;',
        'thetasym;',
        'thinsp;',
        'thorn;',
        'thorn',
        'tilde;',
        'times;',
        'times',
        'trade;',
        'uArr;',
        'uacute;',
        'uacute',
        'uarr;',
        'ucirc;',
        'ucirc',
        'ugrave;',
        'ugrave',
        'uml;',
        'uml',
        'upsih;',
        'upsilon;',
        'uuml;',
        'uuml',
        'weierp;',
        'xi;',
        'yacute;',
        'yacute',
        'yen;',
        'yen',
        'yuml;',
        'yuml',
        'zeta;',
        'zwj;',
        'zwnj;'
    );

    const PCDATA = 0;
    const RCDATA = 1;
    const CDATA = 2;
    const PLAINTEXT = 3;

    const DOCTYPE = 0;
    const STARTTAG = 1;
    const ENDTAG = 2;
    const COMMENT = 3;
    const CHARACTR = 4;
    const EOF = 5;

    public function __construct($data)

    {
        $this->data = $data;
        $this->char = -1;
        $this->EOF = strlen($data);
        $this->tree = new HTML5TreeConstructer;
        $this->content_model = self::PCDATA;

        $this->state = 'data';

        while ($this->state !== null) {
            $this->{$this->state . 'State'}();
        }
    }

    public function save()

    {
        return $this->tree->save();
    }

    private function char()

    {
        return ($this->char < $this->EOF)
            ? $this->data[$this->char]
            : false;
    }

    private function character($s, $l = 0)

    {
        if ($s + $l < $this->EOF) {
            if ($l === 0) {
                return $this->data[$s];
            } else {
                return substr($this->data, $s, $l);
            }
        }
    }

    private function characters($char_class, $start)

    {
        return preg_replace('#^([' . $char_class . ']+).*#s', '\\1', substr($this->data, $start));
    }

    private function dataState()

    {
        // Consume the next input character
        $this->char++;
        $char = $this->char();

        if ($char === '&' && ($this->content_model === self::PCDATA || $this->content_model === self::RCDATA)) {
            /* U+0026 AMPERSAND (&)

            When the content model flag is set to one of the PCDATA or RCDATA

            states: switch to the entity data state. Otherwise: treat it as per

            the "anything else"    entry below. */
            $this->state = 'entityData';

        } elseif ($char === '-') {
            /* If the content model flag is set to either the RCDATA state or

            the CDATA state, and the escape flag is false, and there are at

            least three characters before this one in the input stream, and the

            last four characters in the input stream, including this one, are

            U+003C LESS-THAN SIGN, U+0021 EXCLAMATION MARK, U+002D HYPHEN-MINUS,

            and U+002D HYPHEN-MINUS ("<!--"), then set the escape flag to true. */
            if (($this->content_model === self::RCDATA || $this->content_model ===
                    self::CDATA) && $this->escape === false &&
                $this->char >= 3 && $this->character($this->char - 4, 4) === '<!--'
            ) {
                $this->escape = true;
            }

            /* In any case, emit the input character as a character token. Stay

            in the data state. */
            $this->emitToken(
                array(
                    'type' => self::CHARACTR,
                    'data' => $char
                )
            );

            /* U+003C LESS-THAN SIGN (<) */
        } elseif ($char === '<' && ($this->content_model === self::PCDATA ||
                (($this->content_model === self::RCDATA ||
                        $this->content_model === self::CDATA) && $this->escape === false))
        ) {
            /* When the content model flag is set to the PCDATA state: switch

            to the tag open state.


            When the content model flag is set to either the RCDATA state or

            the CDATA state and the escape flag is false: switch to the tag

            open state.


            Otherwise: treat it as per the "anything else" entry below. */
            $this->state = 'tagOpen';

            /* U+003E GREATER-THAN SIGN (>) */
        } elseif ($char === '>') {
            /* If the content model flag is set to either the RCDATA state or

            the CDATA state, and the escape flag is true, and the last three

            characters in the input stream including this one are U+002D

            HYPHEN-MINUS, U+002D HYPHEN-MINUS, U+003E GREATER-THAN SIGN ("-->"),

            set the escape flag to false. */
            if (($this->content_model === self::RCDATA ||
                    $this->content_model === self::CDATA) && $this->escape === true &&
                $this->character($this->char, 3) === '-->'
            ) {
                $this->escape = false;
            }

            /* In any case, emit the input character as a character token.

            Stay in the data state. */
            $this->emitToken(
                array(
                    'type' => self::CHARACTR,
                    'data' => $char
                )
            );

        } elseif ($this->char === $this->EOF) {
            /* EOF

            Emit an end-of-file token. */
            $this->EOF();

        } elseif ($this->content_model === self::PLAINTEXT) {
            /* When the content model flag is set to the PLAINTEXT state

            THIS DIFFERS GREATLY FROM THE SPEC: Get the remaining characters of

            the text and emit it as a character token. */
            $this->emitToken(
                array(
                    'type' => self::CHARACTR,
                    'data' => substr($this->data, $this->char)
                )
            );

            $this->EOF();

        } else {
            /* Anything else

            THIS DIFFERS GREATLY FROM THE SPEC: Get as many character that

            otherwise would also be treated as a character token and emit it

            as a single character token. Stay in the data state. */
            $len = strcspn($this->data, '<&', $this->char);
            $char = substr($this->data, $this->char, $len);
            $this->char += $len - 1;

            $this->emitToken(
                array(
                    'type' => self::CHARACTR,
                    'data' => $char
                )
            );

            $this->state = 'data';
        }
    }

    private function entityDataState()

    {
        // Attempt to consume an entity.
        $entity = $this->entity();

        // If nothing is returned, emit a U+0026 AMPERSAND character token.
        // Otherwise, emit the character token that was returned.
        $char = (!$entity) ? '&' : $entity;
        $this->emitToken(
            array(
                'type' => self::CHARACTR,
                'data' => $char
            )
        );

        // Finally, switch to the data state.
        $this->state = 'data';
    }

    private function tagOpenState()

    {
        switch ($this->content_model) {
            case self::RCDATA:
            case self::CDATA:
                /* If the next input character is a U+002F SOLIDUS (/) character,

                consume it and switch to the close tag open state. If the next

                input character is not a U+002F SOLIDUS (/) character, emit a

                U+003C LESS-THAN SIGN character token and switch to the data

                state to process the next input character. */
                if ($this->character($this->char + 1) === '/') {
                    $this->char++;
                    $this->state = 'closeTagOpen';

                } else {
                    $this->emitToken(
                        array(
                            'type' => self::CHARACTR,
                            'data' => '<'
                        )
                    );

                    $this->state = 'data';
                }
                break;

            case self::PCDATA:
                // If the content model flag is set to the PCDATA state
                // Consume the next input character:
                $this->char++;
                $char = $this->char();

                if ($char === '!') {
                    /* U+0021 EXCLAMATION MARK (!)

                    Switch to the markup declaration open state. */
                    $this->state = 'markupDeclarationOpen';

                } elseif ($char === '/') {
                    /* U+002F SOLIDUS (/)

                    Switch to the close tag open state. */
                    $this->state = 'closeTagOpen';

                } elseif (preg_match('/^[A-Za-z]$/', $char)) {
                    /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z

                    Create a new start tag token, set its tag name to the lowercase

                    version of the input character (add 0x0020 to the character's code

                    point), then switch to the tag name state. (Don't emit the token

                    yet; further details will be filled in before it is emitted.) */
                    $this->token = array(
                        'name' => strtolower($char),
                        'type' => self::STARTTAG,
                        'attr' => array()
                    );

                    $this->state = 'tagName';

                } elseif ($char === '>') {
                    /* U+003E GREATER-THAN SIGN (>)

                    Parse error. Emit a U+003C LESS-THAN SIGN character token and a

                    U+003E GREATER-THAN SIGN character token. Switch to the data state. */
                    $this->emitToken(
                        array(
                            'type' => self::CHARACTR,
                            'data' => '<>'
                        )
                    );

                    $this->state = 'data';

                } elseif ($char === '?') {
                    /* U+003F QUESTION MARK (?)

                    Parse error. Switch to the bogus comment state. */
                    $this->state = 'bogusComment';

                } else {
                    /* Anything else

                    Parse error. Emit a U+003C LESS-THAN SIGN character token and

                    reconsume the current input character in the data state. */
                    $this->emitToken(
                        array(
                            'type' => self::CHARACTR,
                            'data' => '<'
                        )
                    );

                    $this->char--;
                    $this->state = 'data';
                }
                break;
        }
    }

    private function closeTagOpenState()

    {
        $next_node = strtolower($this->characters('A-Za-z', $this->char + 1));
        $the_same = count($this->tree->stack) > 0 && $next_node === end($this->tree->stack)->nodeName;

        if (($this->content_model === self::RCDATA || $this->content_model === self::CDATA) &&
            (!$the_same || ($the_same && (!preg_match(
                            '/[\t\n\x0b\x0c >\/]/',
                            $this->character($this->char + 1 + strlen($next_node))
                        ) || $this->EOF === $this->char)))
        ) {
            /* If the content model flag is set to the RCDATA or CDATA states then

            examine the next few characters. If they do not match the tag name of

            the last start tag token emitted (case insensitively), or if they do but

            they are not immediately followed by one of the following characters:

                * U+0009 CHARACTER TABULATION

                * U+000A LINE FEED (LF)

                * U+000B LINE TABULATION

                * U+000C FORM FEED (FF)

                * U+0020 SPACE

                * U+003E GREATER-THAN SIGN (>)

                * U+002F SOLIDUS (/)

                * EOF

            ...then there is a parse error. Emit a U+003C LESS-THAN SIGN character

            token, a U+002F SOLIDUS character token, and switch to the data state

            to process the next input character. */
            $this->emitToken(
                array(
                    'type' => self::CHARACTR,
                    'data' => '</'
                )
            );

            $this->state = 'data';

        } else {
            /* Otherwise, if the content model flag is set to the PCDATA state,

            or if the next few characters do match that tag name, consume the

            next input character: */
            $this->char++;
            $char = $this->char();

            if (preg_match('/^[A-Za-z]$/', $char)) {
                /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z

                Create a new end tag token, set its tag name to the lowercase version

                of the input character (add 0x0020 to the character's code point), then

                switch to the tag name state. (Don't emit the token yet; further details

                will be filled in before it is emitted.) */
                $this->token = array(
                    'name' => strtolower($char),
                    'type' => self::ENDTAG
                );

                $this->state = 'tagName';

            } elseif ($char === '>') {
                /* U+003E GREATER-THAN SIGN (>)

                Parse error. Switch to the data state. */
                $this->state = 'data';

            } elseif ($this->char === $this->EOF) {
                /* EOF

                Parse error. Emit a U+003C LESS-THAN SIGN character token and a U+002F

                SOLIDUS character token. Reconsume the EOF character in the data state. */
                $this->emitToken(
                    array(
                        'type' => self::CHARACTR,
                        'data' => '</'
                    )
                );

                $this->char--;
                $this->state = 'data';

            } else {
                /* Parse error. Switch to the bogus comment state. */
                $this->state = 'bogusComment';
            }
        }
    }

    private function tagNameState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            /* U+0009 CHARACTER TABULATION

            U+000A LINE FEED (LF)

            U+000B LINE TABULATION

            U+000C FORM FEED (FF)

            U+0020 SPACE

            Switch to the before attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($char === '>') {
            /* U+003E GREATER-THAN SIGN (>)

            Emit the current tag token. Switch to the data state. */
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif ($this->char === $this->EOF) {
            /* EOF

            Parse error. Emit the current tag token. Reconsume the EOF

            character in the data state. */
            $this->emitToken($this->token);

            $this->char--;
            $this->state = 'data';

        } elseif ($char === '/') {
            /* U+002F SOLIDUS (/)

            Parse error unless this is a permitted slash. Switch to the before

            attribute name state. */
            $this->state = 'beforeAttributeName';

        } else {
            /* Anything else

            Append the current input character to the current tag token's tag name.

            Stay in the tag name state. */
            $this->token['name'] .= strtolower($char);
            $this->state = 'tagName';
        }
    }

    private function beforeAttributeNameState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            /* U+0009 CHARACTER TABULATION

            U+000A LINE FEED (LF)

            U+000B LINE TABULATION

            U+000C FORM FEED (FF)

            U+0020 SPACE

            Stay in the before attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($char === '>') {
            /* U+003E GREATER-THAN SIGN (>)

            Emit the current tag token. Switch to the data state. */
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif ($char === '/') {
            /* U+002F SOLIDUS (/)

            Parse error unless this is a permitted slash. Stay in the before

            attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($this->char === $this->EOF) {
            /* EOF

            Parse error. Emit the current tag token. Reconsume the EOF

            character in the data state. */
            $this->emitToken($this->token);

            $this->char--;
            $this->state = 'data';

        } else {
            /* Anything else

            Start a new attribute in the current tag token. Set that attribute's

            name to the current input character, and its value to the empty string.

            Switch to the attribute name state. */
            $this->token['attr'][] = array(
                'name' => strtolower($char),
                'value' => null
            );

            $this->state = 'attributeName';
        }
    }

    private function attributeNameState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            /* U+0009 CHARACTER TABULATION

            U+000A LINE FEED (LF)

            U+000B LINE TABULATION

            U+000C FORM FEED (FF)

            U+0020 SPACE

            Stay in the before attribute name state. */
            $this->state = 'afterAttributeName';

        } elseif ($char === '=') {
            /* U+003D EQUALS SIGN (=)

            Switch to the before attribute value state. */
            $this->state = 'beforeAttributeValue';

        } elseif ($char === '>') {
            /* U+003E GREATER-THAN SIGN (>)

            Emit the current tag token. Switch to the data state. */
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif ($char === '/' && $this->character($this->char + 1) !== '>') {
            /* U+002F SOLIDUS (/)

            Parse error unless this is a permitted slash. Switch to the before

            attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($this->char === $this->EOF) {
            /* EOF

            Parse error. Emit the current tag token. Reconsume the EOF

            character in the data state. */
            $this->emitToken($this->token);

            $this->char--;
            $this->state = 'data';

        } else {
            /* Anything else

            Append the current input character to the current attribute's name.

            Stay in the attribute name state. */
            $last = count($this->token['attr']) - 1;
            $this->token['attr'][$last]['name'] .= strtolower($char);

            $this->state = 'attributeName';
        }
    }

    private function afterAttributeNameState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            /* U+0009 CHARACTER TABULATION

            U+000A LINE FEED (LF)

            U+000B LINE TABULATION

            U+000C FORM FEED (FF)

            U+0020 SPACE

            Stay in the after attribute name state. */
            $this->state = 'afterAttributeName';

        } elseif ($char === '=') {
            /* U+003D EQUALS SIGN (=)

            Switch to the before attribute value state. */
            $this->state = 'beforeAttributeValue';

        } elseif ($char === '>') {
            /* U+003E GREATER-THAN SIGN (>)

            Emit the current tag token. Switch to the data state. */
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif ($char === '/' && $this->character($this->char + 1) !== '>') {
            /* U+002F SOLIDUS (/)

            Parse error unless this is a permitted slash. Switch to the

            before attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($this->char === $this->EOF) {
            /* EOF

            Parse error. Emit the current tag token. Reconsume the EOF

            character in the data state. */
            $this->emitToken($this->token);

            $this->char--;
            $this->state = 'data';

        } else {
            /* Anything else

            Start a new attribute in the current tag token. Set that attribute's

            name to the current input character, and its value to the empty string.

            Switch to the attribute name state. */
            $this->token['attr'][] = array(
                'name' => strtolower($char),
                'value' => null
            );

            $this->state = 'attributeName';
        }
    }

    private function beforeAttributeValueState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            /* U+0009 CHARACTER TABULATION

            U+000A LINE FEED (LF)

            U+000B LINE TABULATION

            U+000C FORM FEED (FF)

            U+0020 SPACE

            Stay in the before attribute value state. */
            $this->state = 'beforeAttributeValue';

        } elseif ($char === '"') {
            /* U+0022 QUOTATION MARK (")

            Switch to the attribute value (double-quoted) state. */
            $this->state = 'attributeValueDoubleQuoted';

        } elseif ($char === '&') {
            /* U+0026 AMPERSAND (&)

            Switch to the attribute value (unquoted) state and reconsume

            this input character. */
            $this->char--;
            $this->state = 'attributeValueUnquoted';

        } elseif ($char === '\'') {
            /* U+0027 APOSTROPHE (')

            Switch to the attribute value (single-quoted) state. */
            $this->state = 'attributeValueSingleQuoted';

        } elseif ($char === '>') {
            /* U+003E GREATER-THAN SIGN (>)

            Emit the current tag token. Switch to the data state. */
            $this->emitToken($this->token);
            $this->state = 'data';

        } else {
            /* Anything else

            Append the current input character to the current attribute's value.

            Switch to the attribute value (unquoted) state. */
            $last = count($this->token['attr']) - 1;
            $this->token['attr'][$last]['value'] .= $char;

            $this->state = 'attributeValueUnquoted';
        }
    }

    private function attributeValueDoubleQuotedState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if ($char === '"') {
            /* U+0022 QUOTATION MARK (")

            Switch to the before attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($char === '&') {
            /* U+0026 AMPERSAND (&)

            Switch to the entity in attribute value state. */
            $this->entityInAttributeValueState('double');

        } elseif ($this->char === $this->EOF) {
            /* EOF

            Parse error. Emit the current tag token. Reconsume the character

            in the data state. */
            $this->emitToken($this->token);

            $this->char--;
            $this->state = 'data';

        } else {
            /* Anything else

            Append the current input character to the current attribute's value.

            Stay in the attribute value (double-quoted) state. */
            $last = count($this->token['attr']) - 1;
            $this->token['attr'][$last]['value'] .= $char;

            $this->state = 'attributeValueDoubleQuoted';
        }
    }

    private function attributeValueSingleQuotedState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if ($char === '\'') {
            /* U+0022 QUOTATION MARK (')

            Switch to the before attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($char === '&') {
            /* U+0026 AMPERSAND (&)

            Switch to the entity in attribute value state. */
            $this->entityInAttributeValueState('single');

        } elseif ($this->char === $this->EOF) {
            /* EOF

            Parse error. Emit the current tag token. Reconsume the character

            in the data state. */
            $this->emitToken($this->token);

            $this->char--;
            $this->state = 'data';

        } else {
            /* Anything else

            Append the current input character to the current attribute's value.

            Stay in the attribute value (single-quoted) state. */
            $last = count($this->token['attr']) - 1;
            $this->token['attr'][$last]['value'] .= $char;

            $this->state = 'attributeValueSingleQuoted';
        }
    }

    private function attributeValueUnquotedState()

    {
        // Consume the next input character:
        $this->char++;
        $char = $this->character($this->char);

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            /* U+0009 CHARACTER TABULATION

            U+000A LINE FEED (LF)

            U+000B LINE TABULATION

            U+000C FORM FEED (FF)

            U+0020 SPACE

            Switch to the before attribute name state. */
            $this->state = 'beforeAttributeName';

        } elseif ($char === '&') {
            /* U+0026 AMPERSAND (&)

            Switch to the entity in attribute value state. */
            $this->entityInAttributeValueState();

        } elseif ($char === '>') {
            /* U+003E GREATER-THAN SIGN (>)

            Emit the current tag token. Switch to the data state. */
            $this->emitToken($this->token);
            $this->state = 'data';

        } else {
            /* Anything else

            Append the current input character to the current attribute's value.

            Stay in the attribute value (unquoted) state. */
            $last = count($this->token['attr']) - 1;
            $this->token['attr'][$last]['value'] .= $char;

            $this->state = 'attributeValueUnquoted';
        }
    }

    private function entityInAttributeValueState()

    {
        // Attempt to consume an entity.
        $entity = $this->entity();

        // If nothing is returned, append a U+0026 AMPERSAND character to the
        // current attribute's value. Otherwise, emit the character token that
        // was returned.
        $char = (!$entity)
            ? '&'
            : $entity;

        $last = count($this->token['attr']) - 1;
        $this->token['attr'][$last]['value'] .= $char;
    }

    private function bogusCommentState()

    {
        /* Consume every character up to the first U+003E GREATER-THAN SIGN

        character (>) or the end of the file (EOF), whichever comes first. Emit

        a comment token whose data is the concatenation of all the characters

        starting from and including the character that caused the state machine

        to switch into the bogus comment state, up to and including the last

        consumed character before the U+003E character, if any, or up to the

        end of the file otherwise. (If the comment was started by the end of

        the file (EOF), the token is empty.) */
        $data = $this->characters('^>', $this->char);
        $this->emitToken(
            array(
                'data' => $data,
                'type' => self::COMMENT
            )
        );

        $this->char += strlen($data);

        /* Switch to the data state. */
        $this->state = 'data';

        /* If the end of the file was reached, reconsume the EOF character. */
        if ($this->char === $this->EOF) {
            $this->char = $this->EOF - 1;
        }
    }

    private function markupDeclarationOpenState()

    {
        /* If the next two characters are both U+002D HYPHEN-MINUS (-)

        characters, consume those two characters, create a comment token whose

        data is the empty string, and switch to the comment state. */
        if ($this->character($this->char + 1, 2) === '--') {
            $this->char += 2;
            $this->state = 'comment';
            $this->token = array(
                'data' => null,
                'type' => self::COMMENT
            );

            /* Otherwise if the next seven chacacters are a case-insensitive match

            for the word "DOCTYPE", then consume those characters and switch to the

            DOCTYPE state. */
        } elseif (strtolower($this->character($this->char + 1, 7)) === 'doctype') {
            $this->char += 7;
            $this->state = 'doctype';

            /* Otherwise, is is a parse error. Switch to the bogus comment state.

            The next character that is consumed, if any, is the first character

            that will be in the comment. */
        } else {
            $this->char++;
            $this->state = 'bogusComment';
        }
    }

    private function commentState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        /* U+002D HYPHEN-MINUS (-) */
        if ($char === '-') {
            /* Switch to the comment dash state  */
            $this->state = 'commentDash';

            /* EOF */
        } elseif ($this->char === $this->EOF) {
            /* Parse error. Emit the comment token. Reconsume the EOF character

            in the data state. */
            $this->emitToken($this->token);
            $this->char--;
            $this->state = 'data';

            /* Anything else */
        } else {
            /* Append the input character to the comment token's data. Stay in

            the comment state. */
            $this->token['data'] .= $char;
        }
    }

    private function commentDashState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        /* U+002D HYPHEN-MINUS (-) */
        if ($char === '-') {
            /* Switch to the comment end state  */
            $this->state = 'commentEnd';

            /* EOF */
        } elseif ($this->char === $this->EOF) {
            /* Parse error. Emit the comment token. Reconsume the EOF character

            in the data state. */
            $this->emitToken($this->token);
            $this->char--;
            $this->state = 'data';

            /* Anything else */
        } else {
            /* Append a U+002D HYPHEN-MINUS (-) character and the input

            character to the comment token's data. Switch to the comment state. */
            $this->token['data'] .= '-' . $char;
            $this->state = 'comment';
        }
    }

    private function commentEndState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        if ($char === '>') {
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif ($char === '-') {
            $this->token['data'] .= '-';

        } elseif ($this->char === $this->EOF) {
            $this->emitToken($this->token);
            $this->char--;
            $this->state = 'data';

        } else {
            $this->token['data'] .= '--' . $char;
            $this->state = 'comment';
        }
    }

    private function doctypeState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            $this->state = 'beforeDoctypeName';

        } else {
            $this->char--;
            $this->state = 'beforeDoctypeName';
        }
    }

    private function beforeDoctypeNameState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            // Stay in the before DOCTYPE name state.

        } elseif (preg_match('/^[a-z]$/', $char)) {
            $this->token = array(
                'name' => strtoupper($char),
                'type' => self::DOCTYPE,
                'error' => true
            );

            $this->state = 'doctypeName';

        } elseif ($char === '>') {
            $this->emitToken(
                array(
                    'name' => null,
                    'type' => self::DOCTYPE,
                    'error' => true
                )
            );

            $this->state = 'data';

        } elseif ($this->char === $this->EOF) {
            $this->emitToken(
                array(
                    'name' => null,
                    'type' => self::DOCTYPE,
                    'error' => true
                )
            );

            $this->char--;
            $this->state = 'data';

        } else {
            $this->token = array(
                'name' => $char,
                'type' => self::DOCTYPE,
                'error' => true
            );

            $this->state = 'doctypeName';
        }
    }

    private function doctypeNameState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            $this->state = 'AfterDoctypeName';

        } elseif ($char === '>') {
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif (preg_match('/^[a-z]$/', $char)) {
            $this->token['name'] .= strtoupper($char);

        } elseif ($this->char === $this->EOF) {
            $this->emitToken($this->token);
            $this->char--;
            $this->state = 'data';

        } else {
            $this->token['name'] .= $char;
        }

        $this->token['error'] = ($this->token['name'] === 'HTML')
            ? false
            : true;
    }

    private function afterDoctypeNameState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        if (preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
            // Stay in the DOCTYPE name state.

        } elseif ($char === '>') {
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif ($this->char === $this->EOF) {
            $this->emitToken($this->token);
            $this->char--;
            $this->state = 'data';

        } else {
            $this->token['error'] = true;
            $this->state = 'bogusDoctype';
        }
    }

    private function bogusDoctypeState()

    {
        /* Consume the next input character: */
        $this->char++;
        $char = $this->char();

        if ($char === '>') {
            $this->emitToken($this->token);
            $this->state = 'data';

        } elseif ($this->char === $this->EOF) {
            $this->emitToken($this->token);
            $this->char--;
            $this->state = 'data';

        } else {
            // Stay in the bogus DOCTYPE state.
        }
    }

    private function entity()

    {
        $start = $this->char;

        // This section defines how to consume an entity. This definition is
        // used when parsing entities in text and in attributes.

        // The behaviour depends on the identity of the next character (the
        // one immediately after the U+0026 AMPERSAND character):

        switch ($this->character($this->char + 1)) {
            // U+0023 NUMBER SIGN (#)
            case '#':

                // The behaviour further depends on the character after the
                // U+0023 NUMBER SIGN:
                switch ($this->character($this->char + 1)) {
                    // U+0078 LATIN SMALL LETTER X
                    // U+0058 LATIN CAPITAL LETTER X
                    case 'x':
                    case 'X':
                        // Follow the steps below, but using the range of
                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
                        // NINE, U+0061 LATIN SMALL LETTER A through to U+0066
                        // LATIN SMALL LETTER F, and U+0041 LATIN CAPITAL LETTER
                        // A, through to U+0046 LATIN CAPITAL LETTER F (in other
                        // words, 0-9, A-F, a-f).
                        $char = 1;
                        $char_class = '0-9A-Fa-f';
                        break;

                    // Anything else
                    default:
                        // Follow the steps below, but using the range of
                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
                        // NINE (i.e. just 0-9).
                        $char = 0;
                        $char_class = '0-9';
                        break;
                }

                // Consume as many characters as match the range of characters
                // given above.
                $this->char++;
                $e_name = $this->characters($char_class, $this->char + $char + 1);
                $entity = $this->character($start, $this->char);
                $cond = strlen($e_name) > 0;

                // The rest of the parsing happens below.
                break;

            // Anything else
            default:
                // Consume the maximum number of characters possible, with the
                // consumed characters case-sensitively matching one of the
                // identifiers in the first column of the entities table.

                $e_name = $this->characters('0-9A-Za-z;', $this->char + 1);
                $len = strlen($e_name);

                for ($c = 1; $c <= $len; $c++) {
                    $id = substr($e_name, 0, $c);
                    $this->char++;

                    if (in_array($id, $this->entities)) {
                        if ($e_name[$c - 1] !== ';') {
                            if ($c < $len && $e_name[$c] == ';') {
                                $this->char++; // consume extra semicolon
                            }
                        }
                        $entity = $id;
                        break;
                    }
                }

                $cond = isset($entity);
                // The rest of the parsing happens below.
                break;
        }

        if (!$cond) {
            // If no match can be made, then this is a parse error. No
            // characters are consumed, and nothing is returned.
            $this->char = $start;
            return false;
        }

        // Return a character token for the character corresponding to the
        // entity name (as given by the second column of the entities table).
        return html_entity_decode('&' . rtrim($entity, ';') . ';', ENT_QUOTES, 'UTF-8');
    }

    private function emitToken($token)

    {
        $emit = $this->tree->emitToken($token);

        if (is_int($emit)) {
            $this->content_model = $emit;

        } elseif ($token['type'] === self::ENDTAG) {
            $this->content_model = self::PCDATA;
        }
    }

    private function EOF()

    {
        $this->state = null;
        $this->tree->emitToken(
            array(
                'type' => self::EOF
            )
        );
    }
}

class HTML5TreeConstructer

{
    public $stack = array();

    private $phase;
    private $mode;
    private $dom;
    private $foster_parent = null;
    private $a_formatting = array();

    private $head_pointer = null;
    private $form_pointer = null;

    private $scoping = array('button', 'caption', 'html', 'marquee', 'object', 'table', 'td', 'th');
    private $formatting = array(
        'a',
        'b',
        'big',
        'em',
        'font',
        'i',
        'nobr',
        's',
        'small',
        'strike',
        'strong',
        'tt',
        'u'
    );
    private $special = array(
        'address',
        'area',
        'base',
        'basefont',
        'bgsound',
        'blockquote',
        'body',
        'br',
        'center',
        'col',
        'colgroup',
        'dd',
        'dir',
        'div',
        'dl',
        'dt',
        'embed',
        'fieldset',
        'form',
        'frame',
        'frameset',
        'h1',
        'h2',
        'h3',
        'h4',
        'h5',
        'h6',
        'head',
        'hr',
        'iframe',
        'image',
        'img',
        'input',
        'isindex',
        'li',
        'link',
        'listing',
        'menu',
        'meta',
        'noembed',
        'noframes',
        'noscript',
        'ol',
        'optgroup',
        'option',
        'p',
        'param',
        'plaintext',
        'pre',
        'script',
        'select',
        'spacer',
        'style',
        'tbody',
        'textarea',
        'tfoot',
        'thead',
        'title',
        'tr',
        'ul',
        'wbr'
    );

    // The different phases.
    const INIT_PHASE = 0;
    const ROOT_PHASE = 1;
    const MAIN_PHASE = 2;
    const END_PHASE = 3;

    // The different insertion modes for the main phase.
    const BEFOR_HEAD = 0;
    const IN_HEAD = 1;
    const AFTER_HEAD = 2;
    const IN_BODY = 3;
    const IN_TABLE = 4;
    const IN_CAPTION = 5;
    const IN_CGROUP = 6;
    const IN_TBODY = 7;
    const IN_ROW = 8;
    const IN_CELL = 9;
    const IN_SELECT = 10;
    const AFTER_BODY = 11;
    const IN_FRAME = 12;
    const AFTR_FRAME = 13;

    // The different types of elements.
    const SPECIAL = 0;
    const SCOPING = 1;
    const FORMATTING = 2;
    const PHRASING = 3;

    const MARKER = 0;

    public function __construct()

    {
        $this->phase = self::INIT_PHASE;
        $this->mode = self::BEFOR_HEAD;
        $this->dom = new DOMDocument;

        $this->dom->encoding = 'UTF-8';
        $this->dom->preserveWhiteSpace = true;
        $this->dom->substituteEntities = true;
        $this->dom->strictErrorChecking = false;
    }

    // Process tag tokens
    public function emitToken($token)

    {
        switch ($this->phase) {
            case self::INIT_PHASE:
                return $this->initPhase($token);
                break;
            case self::ROOT_PHASE:
                return $this->rootElementPhase($token);
                break;
            case self::MAIN_PHASE:
                return $this->mainPhase($token);
                break;
            case self::END_PHASE :
                return $this->trailingEndPhase($token);
                break;
        }
    }

    private function initPhase($token)

    {
        /* Initially, the tree construction stage must handle each token

        emitted from the tokenisation stage as follows: */

        /* A DOCTYPE token that is marked as being in error

        A comment token

        A start tag token

        An end tag token

        A character token that is not one of one of U+0009 CHARACTER TABULATION,

            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

            or U+0020 SPACE

        An end-of-file token */
        if ((isset($token['error']) && $token['error']) ||
            $token['type'] === HTML5::COMMENT ||
            $token['type'] === HTML5::STARTTAG ||
            $token['type'] === HTML5::ENDTAG ||
            $token['type'] === HTML5::EOF ||
            ($token['type'] === HTML5::CHARACTR && isset($token['data']) &&
                !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data']))
        ) {
            /* This specification does not define how to handle this case. In

            particular, user agents may ignore the entirety of this specification

            altogether for such documents, and instead invoke special parse modes

            with a greater emphasis on backwards compatibility. */

            $this->phase = self::ROOT_PHASE;
            return $this->rootElementPhase($token);

            /* A DOCTYPE token marked as being correct */
        } elseif (isset($token['error']) && !$token['error']) {
            /* Append a DocumentType node to the Document  node, with the name

            attribute set to the name given in the DOCTYPE token (which will be

            "HTML"), and the other attributes specific to DocumentType objects

            set to null, empty lists, or the empty string as appropriate. */
            $doctype = new DOMDocumentType(null, null, 'HTML');

            /* Then, switch to the root element phase of the tree construction

            stage. */
            $this->phase = self::ROOT_PHASE;

            /* A character token that is one of one of U+0009 CHARACTER TABULATION,

            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

            or U+0020 SPACE */
        } elseif (isset($token['data']) && preg_match(
                '/^[\t\n\x0b\x0c ]+$/',
                $token['data']
            )
        ) {
            /* Append that character  to the Document node. */
            $text = $this->dom->createTextNode($token['data']);
            $this->dom->appendChild($text);
        }
    }

    private function rootElementPhase($token)

    {
        /* After the initial phase, as each token is emitted from the tokenisation

        stage, it must be processed as described in this section. */

        /* A DOCTYPE token */
        if ($token['type'] === HTML5::DOCTYPE) {
            // Parse error. Ignore the token.

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the Document object with the data

            attribute set to the data given in the comment token. */
            $comment = $this->dom->createComment($token['data']);
            $this->dom->appendChild($comment);

            /* A character token that is one of one of U+0009 CHARACTER TABULATION,

            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

            or U+0020 SPACE */
        } elseif ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Append that character  to the Document node. */
            $text = $this->dom->createTextNode($token['data']);
            $this->dom->appendChild($text);

            /* A character token that is not one of U+0009 CHARACTER TABULATION,

                U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED

                (FF), or U+0020 SPACE

            A start tag token

            An end tag token

            An end-of-file token */
        } elseif (($token['type'] === HTML5::CHARACTR &&
                !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
            $token['type'] === HTML5::STARTTAG ||
            $token['type'] === HTML5::ENDTAG ||
            $token['type'] === HTML5::EOF
        ) {
            /* Create an HTMLElement node with the tag name html, in the HTML

            namespace. Append it to the Document object. Switch to the main

            phase and reprocess the current token. */
            $html = $this->dom->createElement('html');
            $this->dom->appendChild($html);
            $this->stack[] = $html;

            $this->phase = self::MAIN_PHASE;
            return $this->mainPhase($token);
        }
    }

    private function mainPhase($token)

    {
        /* Tokens in the main phase must be handled as follows: */

        /* A DOCTYPE token */
        if ($token['type'] === HTML5::DOCTYPE) {
            // Parse error. Ignore the token.

            /* A start tag token with the tag name "html" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'html') {
            /* If this start tag token was not the first start tag token, then

            it is a parse error. */

            /* For each attribute on the token, check to see if the attribute

            is already present on the top element of the stack of open elements.

            If it is not, add the attribute and its corresponding value to that

            element. */
            foreach ($token['attr'] as $attr) {
                if (!$this->stack[0]->hasAttribute($attr['name'])) {
                    $this->stack[0]->setAttribute($attr['name'], $attr['value']);
                }
            }

            /* An end-of-file token */
        } elseif ($token['type'] === HTML5::EOF) {
            /* Generate implied end tags. */
            $this->generateImpliedEndTags();

            /* Anything else. */
        } else {
            /* Depends on the insertion mode: */
            switch ($this->mode) {
                case self::BEFOR_HEAD:
                    return $this->beforeHead($token);
                    break;
                case self::IN_HEAD:
                    return $this->inHead($token);
                    break;
                case self::AFTER_HEAD:
                    return $this->afterHead($token);
                    break;
                case self::IN_BODY:
                    return $this->inBody($token);
                    break;
                case self::IN_TABLE:
                    return $this->inTable($token);
                    break;
                case self::IN_CAPTION:
                    return $this->inCaption($token);
                    break;
                case self::IN_CGROUP:
                    return $this->inColumnGroup($token);
                    break;
                case self::IN_TBODY:
                    return $this->inTableBody($token);
                    break;
                case self::IN_ROW:
                    return $this->inRow($token);
                    break;
                case self::IN_CELL:
                    return $this->inCell($token);
                    break;
                case self::IN_SELECT:
                    return $this->inSelect($token);
                    break;
                case self::AFTER_BODY:
                    return $this->afterBody($token);
                    break;
                case self::IN_FRAME:
                    return $this->inFrameset($token);
                    break;
                case self::AFTR_FRAME:
                    return $this->afterFrameset($token);
                    break;
                case self::END_PHASE:
                    return $this->trailingEndPhase($token);
                    break;
            }
        }
    }

    private function beforeHead($token)

    {
        /* Handle the token as follows: */

        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        or U+0020 SPACE */
        if ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Append the character to the current node. */
            $this->insertText($token['data']);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data attribute

            set to the data given in the comment token. */
            $this->insertComment($token['data']);

            /* A start tag token with the tag name "head" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') {
            /* Create an element for the token, append the new element to the

            current node and push it onto the stack of open elements. */
            $element = $this->insertElement($token);

            /* Set the head element pointer to this new element node. */
            $this->head_pointer = $element;

            /* Change the insertion mode to "in head". */
            $this->mode = self::IN_HEAD;

            /* A start tag token whose tag name is one of: "base", "link", "meta",

            "script", "style", "title". Or an end tag with the tag name "html".

            Or a character token that is not one of U+0009 CHARACTER TABULATION,

            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

            or U+0020 SPACE. Or any other start tag token */
        } elseif ($token['type'] === HTML5::STARTTAG ||
            ($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') ||
            ($token['type'] === HTML5::CHARACTR && !preg_match(
                    '/^[\t\n\x0b\x0c ]$/',
                    $token['data']
                ))
        ) {
            /* Act as if a start tag token with the tag name "head" and no

            attributes had been seen, then reprocess the current token. */
            $this->beforeHead(
                array(
                    'name' => 'head',
                    'type' => HTML5::STARTTAG,
                    'attr' => array()
                )
            );

            return $this->inHead($token);

            /* Any other end tag */
        } elseif ($token['type'] === HTML5::ENDTAG) {
            /* Parse error. Ignore the token. */
        }
    }

    private function inHead($token)

    {
        /* Handle the token as follows: */

        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        or U+0020 SPACE.


        THIS DIFFERS FROM THE SPEC: If the current node is either a title, style

        or script element, append the character to the current node regardless

        of its content. */
        if (($token['type'] === HTML5::CHARACTR &&
                preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) || (
                $token['type'] === HTML5::CHARACTR && in_array(
                    end($this->stack)->nodeName,
                    array('title', 'style', 'script')
                ))
        ) {
            /* Append the character to the current node. */
            $this->insertText($token['data']);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data attribute

            set to the data given in the comment token. */
            $this->insertComment($token['data']);

        } elseif ($token['type'] === HTML5::ENDTAG &&
            in_array($token['name'], array('title', 'style', 'script'))
        ) {
            array_pop($this->stack);
            return HTML5::PCDATA;

            /* A start tag with the tag name "title" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'title') {
            /* Create an element for the token and append the new element to the

            node pointed to by the head element pointer, or, if that is null

            (innerHTML case), to the current node. */
            if ($this->head_pointer !== null) {
                $element = $this->insertElement($token, false);
                $this->head_pointer->appendChild($element);

            } else {
                $element = $this->insertElement($token);
            }

            /* Switch the tokeniser's content model flag  to the RCDATA state. */
            return HTML5::RCDATA;

            /* A start tag with the tag name "style" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'style') {
            /* Create an element for the token and append the new element to the

            node pointed to by the head element pointer, or, if that is null

            (innerHTML case), to the current node. */
            if ($this->head_pointer !== null) {
                $element = $this->insertElement($token, false);
                $this->head_pointer->appendChild($element);

            } else {
                $this->insertElement($token);
            }

            /* Switch the tokeniser's content model flag  to the CDATA state. */
            return HTML5::CDATA;

            /* A start tag with the tag name "script" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'script') {
            /* Create an element for the token. */
            $element = $this->insertElement($token, false);
            $this->head_pointer->appendChild($element);

            /* Switch the tokeniser's content model flag  to the CDATA state. */
            return HTML5::CDATA;

            /* A start tag with the tag name "base", "link", or "meta" */
        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
                $token['name'],
                array('base', 'link', 'meta')
            )
        ) {
            /* Create an element for the token and append the new element to the

            node pointed to by the head element pointer, or, if that is null

            (innerHTML case), to the current node. */
            if ($this->head_pointer !== null) {
                $element = $this->insertElement($token, false);
                $this->head_pointer->appendChild($element);
                array_pop($this->stack);

            } else {
                $this->insertElement($token);
            }

            /* An end tag with the tag name "head" */
        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'head') {
            /* If the current node is a head element, pop the current node off

            the stack of open elements. */
            if ($this->head_pointer->isSameNode(end($this->stack))) {
                array_pop($this->stack);

                /* Otherwise, this is a parse error. */
            } else {
                // k
            }

            /* Change the insertion mode to "after head". */
            $this->mode = self::AFTER_HEAD;

            /* A start tag with the tag name "head" or an end tag except "html". */
        } elseif (($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') ||
            ($token['type'] === HTML5::ENDTAG && $token['name'] !== 'html')
        ) {
            // Parse error. Ignore the token.

            /* Anything else */
        } else {
            /* If the current node is a head element, act as if an end tag

            token with the tag name "head" had been seen. */
            if ($this->head_pointer->isSameNode(end($this->stack))) {
                $this->inHead(
                    array(
                        'name' => 'head',
                        'type' => HTML5::ENDTAG
                    )
                );

                /* Otherwise, change the insertion mode to "after head". */
            } else {
                $this->mode = self::AFTER_HEAD;
            }

            /* Then, reprocess the current token. */
            return $this->afterHead($token);
        }
    }

    private function afterHead($token)

    {
        /* Handle the token as follows: */

        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        or U+0020 SPACE */
        if ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Append the character to the current node. */
            $this->insertText($token['data']);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data attribute

            set to the data given in the comment token. */
            $this->insertComment($token['data']);

            /* A start tag token with the tag name "body" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'body') {
            /* Insert a body element for the token. */
            $this->insertElement($token);

            /* Change the insertion mode to "in body". */
            $this->mode = self::IN_BODY;

            /* A start tag token with the tag name "frameset" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'frameset') {
            /* Insert a frameset element for the token. */
            $this->insertElement($token);

            /* Change the insertion mode to "in frameset". */
            $this->mode = self::IN_FRAME;

            /* A start tag token whose tag name is one of: "base", "link", "meta",

            "script", "style", "title" */
        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
                $token['name'],
                array('base', 'link', 'meta', 'script', 'style', 'title')
            )
        ) {
            /* Parse error. Switch the insertion mode back to "in head" and

            reprocess the token. */
            $this->mode = self::IN_HEAD;
            return $this->inHead($token);

            /* Anything else */
        } else {
            /* Act as if a start tag token with the tag name "body" and no

            attributes had been seen, and then reprocess the current token. */
            $this->afterHead(
                array(
                    'name' => 'body',
                    'type' => HTML5::STARTTAG,
                    'attr' => array()
                )
            );

            return $this->inBody($token);
        }
    }

    private function inBody($token)

    {
        /* Handle the token as follows: */

        switch ($token['type']) {
            /* A character token */
            case HTML5::CHARACTR:
                /* Reconstruct the active formatting elements, if any. */
                $this->reconstructActiveFormattingElements();

                /* Append the token's character to the current node. */
                $this->insertText($token['data']);
                break;

            /* A comment token */
            case HTML5::COMMENT:
                /* Append a Comment node to the current node with the data

                attribute set to the data given in the comment token. */
                $this->insertComment($token['data']);
                break;

            case HTML5::STARTTAG:
                switch ($token['name']) {
                    /* A start tag token whose tag name is one of: "script",

                    "style" */
                    case 'script':
                    case 'style':
                        /* Process the token as if the insertion mode had been "in

                        head". */
                        return $this->inHead($token);
                        break;

                    /* A start tag token whose tag name is one of: "base", "link",

                    "meta", "title" */
                    case 'base':
                    case 'link':
                    case 'meta':
                    case 'title':
                        /* Parse error. Process the token as if the insertion mode

                        had    been "in head". */
                        return $this->inHead($token);
                        break;

                    /* A start tag token with the tag name "body" */
                    case 'body':
                        /* Parse error. If the second element on the stack of open

                        elements is not a body element, or, if the stack of open

                        elements has only one node on it, then ignore the token.

                        (innerHTML case) */
                        if (count($this->stack) === 1 || $this->stack[1]->nodeName !== 'body') {
                            // Ignore

                            /* Otherwise, for each attribute on the token, check to see

                            if the attribute is already present on the body element (the

                            second element)    on the stack of open elements. If it is not,

                            add the attribute and its corresponding value to that

                            element. */
                        } else {
                            foreach ($token['attr'] as $attr) {
                                if (!$this->stack[1]->hasAttribute($attr['name'])) {
                                    $this->stack[1]->setAttribute($attr['name'], $attr['value']);
                                }
                            }
                        }
                        break;

                    /* A start tag whose tag name is one of: "address",

                    "blockquote", "center", "dir", "div", "dl", "fieldset",

                    "listing", "menu", "ol", "p", "ul" */
                    case 'address':
                    case 'blockquote':
                    case 'center':
                    case 'dir':
                    case 'div':
                    case 'dl':
                    case 'fieldset':
                    case 'listing':
                    case 'menu':
                    case 'ol':
                    case 'p':
                    case 'ul':
                        /* If the stack of open elements has a p element in scope,

                        then act as if an end tag with the tag name p had been

                        seen. */
                        if ($this->elementInScope('p')) {
                            $this->emitToken(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);
                        break;

                    /* A start tag whose tag name is "form" */
                    case 'form':
                        /* If the form element pointer is not null, ignore the

                        token with a parse error. */
                        if ($this->form_pointer !== null) {
                            // Ignore.

                            /* Otherwise: */
                        } else {
                            /* If the stack of open elements has a p element in

                            scope, then act as if an end tag with the tag name p

                            had been seen. */
                            if ($this->elementInScope('p')) {
                                $this->emitToken(
                                    array(
                                        'name' => 'p',
                                        'type' => HTML5::ENDTAG
                                    )
                                );
                            }

                            /* Insert an HTML element for the token, and set the

                            form element pointer to point to the element created. */
                            $element = $this->insertElement($token);
                            $this->form_pointer = $element;
                        }
                        break;

                    /* A start tag whose tag name is "li", "dd" or "dt" */
                    case 'li':
                    case 'dd':
                    case 'dt':
                        /* If the stack of open elements has a p  element in scope,

                        then act as if an end tag with the tag name p had been

                        seen. */
                        if ($this->elementInScope('p')) {
                            $this->emitToken(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }

                        $stack_length = count($this->stack) - 1;

                        for ($n = $stack_length; 0 <= $n; $n--) {
                            /* 1. Initialise node to be the current node (the

                            bottommost node of the stack). */
                            $stop = false;
                            $node = $this->stack[$n];
                            $cat = $this->getElementCategory($node->tagName);

                            /* 2. If node is an li, dd or dt element, then pop all

                            the    nodes from the current node up to node, including

                            node, then stop this algorithm. */
                            if ($token['name'] === $node->tagName || ($token['name'] !== 'li'
                                    && ($node->tagName === 'dd' || $node->tagName === 'dt'))
                            ) {
                                for ($x = $stack_length; $x >= $n; $x--) {
                                    array_pop($this->stack);
                                }

                                break;
                            }

                            /* 3. If node is not in the formatting category, and is

                            not    in the phrasing category, and is not an address or

                            div element, then stop this algorithm. */
                            if ($cat !== self::FORMATTING && $cat !== self::PHRASING &&
                                $node->tagName !== 'address' && $node->tagName !== 'div'
                            ) {
                                break;
                            }
                        }

                        /* Finally, insert an HTML element with the same tag

                        name as the    token's. */
                        $this->insertElement($token);
                        break;

                    /* A start tag token whose tag name is "plaintext" */
                    case 'plaintext':
                        /* If the stack of open elements has a p  element in scope,

                        then act as if an end tag with the tag name p had been

                        seen. */
                        if ($this->elementInScope('p')) {
                            $this->emitToken(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        return HTML5::PLAINTEXT;
                        break;

                    /* A start tag whose tag name is one of: "h1", "h2", "h3", "h4",

                    "h5", "h6" */
                    case 'h1':
                    case 'h2':
                    case 'h3':
                    case 'h4':
                    case 'h5':
                    case 'h6':
                        /* If the stack of open elements has a p  element in scope,

                        then act as if an end tag with the tag name p had been seen. */
                        if ($this->elementInScope('p')) {
                            $this->emitToken(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }

                        /* If the stack of open elements has in scope an element whose

                        tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then

                        this is a parse error; pop elements from the stack until an

                        element with one of those tag names has been popped from the

                        stack. */
                        while ($this->elementInScope(array('h1', 'h2', 'h3', 'h4', 'h5', 'h6'))) {
                            array_pop($this->stack);
                        }

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);
                        break;

                    /* A start tag whose tag name is "a" */
                    case 'a':
                        /* If the list of active formatting elements contains

                        an element whose tag name is "a" between the end of the

                        list and the last marker on the list (or the start of

                        the list if there is no marker on the list), then this

                        is a parse error; act as if an end tag with the tag name

                        "a" had been seen, then remove that element from the list

                        of active formatting elements and the stack of open

                        elements if the end tag didn't already remove it (it

                        might not have if the element is not in table scope). */
                        $leng = count($this->a_formatting);

                        for ($n = $leng - 1; $n >= 0; $n--) {
                            if ($this->a_formatting[$n] === self::MARKER) {
                                break;

                            } elseif ($this->a_formatting[$n]->nodeName === 'a') {
                                $this->emitToken(
                                    array(
                                        'name' => 'a',
                                        'type' => HTML5::ENDTAG
                                    )
                                );
                                break;
                            }
                        }

                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an HTML element for the token. */
                        $el = $this->insertElement($token);

                        /* Add that element to the list of active formatting

                        elements. */
                        $this->a_formatting[] = $el;
                        break;

                    /* A start tag whose tag name is one of: "b", "big", "em", "font",

                    "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
                    case 'b':
                    case 'big':
                    case 'em':
                    case 'font':
                    case 'i':
                    case 'nobr':
                    case 's':
                    case 'small':
                    case 'strike':
                    case 'strong':
                    case 'tt':
                    case 'u':
                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an HTML element for the token. */
                        $el = $this->insertElement($token);

                        /* Add that element to the list of active formatting

                        elements. */
                        $this->a_formatting[] = $el;
                        break;

                    /* A start tag token whose tag name is "button" */
                    case 'button':
                        /* If the stack of open elements has a button element in scope,

                        then this is a parse error; act as if an end tag with the tag

                        name "button" had been seen, then reprocess the token. (We don't

                        do that. Unnecessary.) */
                        if ($this->elementInScope('button')) {
                            $this->inBody(
                                array(
                                    'name' => 'button',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }

                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        /* Insert a marker at the end of the list of active

                        formatting elements. */
                        $this->a_formatting[] = self::MARKER;
                        break;

                    /* A start tag token whose tag name is one of: "marquee", "object" */
                    case 'marquee':
                    case 'object':
                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        /* Insert a marker at the end of the list of active

                        formatting elements. */
                        $this->a_formatting[] = self::MARKER;
                        break;

                    /* A start tag token whose tag name is "xmp" */
                    case 'xmp':
                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        /* Switch the content model flag to the CDATA state. */
                        return HTML5::CDATA;
                        break;

                    /* A start tag whose tag name is "table" */
                    case 'table':
                        /* If the stack of open elements has a p element in scope,

                        then act as if an end tag with the tag name p had been seen. */
                        if ($this->elementInScope('p')) {
                            $this->emitToken(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        /* Change the insertion mode to "in table". */
                        $this->mode = self::IN_TABLE;
                        break;

                    /* A start tag whose tag name is one of: "area", "basefont",

                    "bgsound", "br", "embed", "img", "param", "spacer", "wbr" */
                    case 'area':
                    case 'basefont':
                    case 'bgsound':
                    case 'br':
                    case 'embed':
                    case 'img':
                    case 'param':
                    case 'spacer':
                    case 'wbr':
                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        /* Immediately pop the current node off the stack of open elements. */
                        array_pop($this->stack);
                        break;

                    /* A start tag whose tag name is "hr" */
                    case 'hr':
                        /* If the stack of open elements has a p element in scope,

                        then act as if an end tag with the tag name p had been seen. */
                        if ($this->elementInScope('p')) {
                            $this->emitToken(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        /* Immediately pop the current node off the stack of open elements. */
                        array_pop($this->stack);
                        break;

                    /* A start tag whose tag name is "image" */
                    case 'image':
                        /* Parse error. Change the token's tag name to "img" and

                        reprocess it. (Don't ask.) */
                        $token['name'] = 'img';
                        return $this->inBody($token);
                        break;

                    /* A start tag whose tag name is "input" */
                    case 'input':
                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an input element for the token. */
                        $element = $this->insertElement($token, false);

                        /* If the form element pointer is not null, then associate the

                        input element with the form element pointed to by the form

                        element pointer. */
                        $this->form_pointer !== null
                            ? $this->form_pointer->appendChild($element)
                            : end($this->stack)->appendChild($element);

                        /* Pop that input element off the stack of open elements. */
                        array_pop($this->stack);
                        break;

                    /* A start tag whose tag name is "isindex" */
                    case 'isindex':
                        /* Parse error. */
                        // w/e

                        /* If the form element pointer is not null,

                        then ignore the token. */
                        if ($this->form_pointer === null) {
                            /* Act as if a start tag token with the tag name "form" had

                            been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'body',
                                    'type' => HTML5::STARTTAG,
                                    'attr' => array()
                                )
                            );

                            /* Act as if a start tag token with the tag name "hr" had

                            been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'hr',
                                    'type' => HTML5::STARTTAG,
                                    'attr' => array()
                                )
                            );

                            /* Act as if a start tag token with the tag name "p" had

                            been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::STARTTAG,
                                    'attr' => array()
                                )
                            );

                            /* Act as if a start tag token with the tag name "label"

                            had been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'label',
                                    'type' => HTML5::STARTTAG,
                                    'attr' => array()
                                )
                            );

                            /* Act as if a stream of character tokens had been seen. */
                            $this->insertText(
                                'This is a searchable index. ' .
                                'Insert your search keywords here: '
                            );

                            /* Act as if a start tag token with the tag name "input"

                            had been seen, with all the attributes from the "isindex"

                            token, except with the "name" attribute set to the value

                            "isindex" (ignoring any explicit "name" attribute). */
                            $attr = $token['attr'];
                            $attr[] = array('name' => 'name', 'value' => 'isindex');

                            $this->inBody(
                                array(
                                    'name' => 'input',
                                    'type' => HTML5::STARTTAG,
                                    'attr' => $attr
                                )
                            );

                            /* Act as if a stream of character tokens had been seen

                            (see below for what they should say). */
                            $this->insertText(
                                'This is a searchable index. ' .
                                'Insert your search keywords here: '
                            );

                            /* Act as if an end tag token with the tag name "label"

                            had been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'label',
                                    'type' => HTML5::ENDTAG
                                )
                            );

                            /* Act as if an end tag token with the tag name "p" had

                            been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'p',
                                    'type' => HTML5::ENDTAG
                                )
                            );

                            /* Act as if a start tag token with the tag name "hr" had

                            been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'hr',
                                    'type' => HTML5::ENDTAG
                                )
                            );

                            /* Act as if an end tag token with the tag name "form" had

                            been seen. */
                            $this->inBody(
                                array(
                                    'name' => 'form',
                                    'type' => HTML5::ENDTAG
                                )
                            );
                        }
                        break;

                    /* A start tag whose tag name is "textarea" */
                    case 'textarea':
                        $this->insertElement($token);

                        /* Switch the tokeniser's content model flag to the

                        RCDATA state. */
                        return HTML5::RCDATA;
                        break;

                    /* A start tag whose tag name is one of: "iframe", "noembed",

                    "noframes" */
                    case 'iframe':
                    case 'noembed':
                    case 'noframes':
                        $this->insertElement($token);

                        /* Switch the tokeniser's content model flag to the CDATA state. */
                        return HTML5::CDATA;
                        break;

                    /* A start tag whose tag name is "select" */
                    case 'select':
                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        /* Insert an HTML element for the token. */
                        $this->insertElement($token);

                        /* Change the insertion mode to "in select". */
                        $this->mode = self::IN_SELECT;
                        break;

                    /* A start or end tag whose tag name is one of: "caption", "col",

                    "colgroup", "frame", "frameset", "head", "option", "optgroup",

                    "tbody", "td", "tfoot", "th", "thead", "tr". */
                    case 'caption':
                    case 'col':
                    case 'colgroup':
                    case 'frame':
                    case 'frameset':
                    case 'head':
                    case 'option':
                    case 'optgroup':
                    case 'tbody':
                    case 'td':
                    case 'tfoot':
                    case 'th':
                    case 'thead':
                    case 'tr':
                        // Parse error. Ignore the token.
                        break;

                    /* A start or end tag whose tag name is one of: "event-source",

                    "section", "nav", "article", "aside", "header", "footer",

                    "datagrid", "command" */
                    case 'event-source':
                    case 'section':
                    case 'nav':
                    case 'article':
                    case 'aside':
                    case 'header':
                    case 'footer':
                    case 'datagrid':
                    case 'command':
                        // Work in progress!
                        break;

                    /* A start tag token not covered by the previous entries */
                    default:
                        /* Reconstruct the active formatting elements, if any. */
                        $this->reconstructActiveFormattingElements();

                        $this->insertElement($token, true, true);
                        break;
                }
                break;

            case HTML5::ENDTAG:
                switch ($token['name']) {
                    /* An end tag with the tag name "body" */
                    case 'body':
                        /* If the second element in the stack of open elements is

                        not a body element, this is a parse error. Ignore the token.

                        (innerHTML case) */
                        if (count($this->stack) < 2 || $this->stack[1]->nodeName !== 'body') {
                            // Ignore.

                            /* If the current node is not the body element, then this

                            is a parse error. */
                        } elseif (end($this->stack)->nodeName !== 'body') {
                            // Parse error.
                        }

                        /* Change the insertion mode to "after body". */
                        $this->mode = self::AFTER_BODY;
                        break;

                    /* An end tag with the tag name "html" */
                    case 'html':
                        /* Act as if an end tag with tag name "body" had been seen,

                        then, if that token wasn't ignored, reprocess the current

                        token. */
                        $this->inBody(
                            array(
                                'name' => 'body',
                                'type' => HTML5::ENDTAG
                            )
                        );

                        return $this->afterBody($token);
                        break;

                    /* An end tag whose tag name is one of: "address", "blockquote",

                    "center", "dir", "div", "dl", "fieldset", "listing", "menu",

                    "ol", "pre", "ul" */
                    case 'address':
                    case 'blockquote':
                    case 'center':
                    case 'dir':
                    case 'div':
                    case 'dl':
                    case 'fieldset':
                    case 'listing':
                    case 'menu':
                    case 'ol':
                    case 'pre':
                    case 'ul':
                        /* If the stack of open elements has an element in scope

                        with the same tag name as that of the token, then generate

                        implied end tags. */
                        if ($this->elementInScope($token['name'])) {
                            $this->generateImpliedEndTags();

                            /* Now, if the current node is not an element with

                            the same tag name as that of the token, then this

                            is a parse error. */
                            // w/e

                            /* If the stack of open elements has an element in

                            scope with the same tag name as that of the token,

                            then pop elements from this stack until an element

                            with that tag name has been popped from the stack. */
                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
                                if ($this->stack[$n]->nodeName === $token['name']) {
                                    $n = -1;
                                }

                                array_pop($this->stack);
                            }
                        }
                        break;

                    /* An end tag whose tag name is "form" */
                    case 'form':
                        /* If the stack of open elements has an element in scope

                        with the same tag name as that of the token, then generate

                        implied    end tags. */
                        if ($this->elementInScope($token['name'])) {
                            $this->generateImpliedEndTags();

                        }

                        if (end($this->stack)->nodeName !== $token['name']) {
                            /* Now, if the current node is not an element with the

                            same tag name as that of the token, then this is a parse

                            error. */
                            // w/e

                        } else {
                            /* Otherwise, if the current node is an element with

                            the same tag name as that of the token pop that element

                            from the stack. */
                            array_pop($this->stack);
                        }

                        /* In any case, set the form element pointer to null. */
                        $this->form_pointer = null;
                        break;

                    /* An end tag whose tag name is "p" */
                    case 'p':
                        /* If the stack of open elements has a p element in scope,

                        then generate implied end tags, except for p elements. */
                        if ($this->elementInScope('p')) {
                            $this->generateImpliedEndTags(array('p'));

                            /* If the current node is not a p element, then this is

                            a parse error. */
                            // k

                            /* If the stack of open elements has a p element in

                            scope, then pop elements from this stack until the stack

                            no longer has a p element in scope. */
                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
                                if ($this->elementInScope('p')) {
                                    array_pop($this->stack);

                                } else {
                                    break;
                                }
                            }
                        }
                        break;

                    /* An end tag whose tag name is "dd", "dt", or "li" */
                    case 'dd':
                    case 'dt':
                    case 'li':
                        /* If the stack of open elements has an element in scope

                        whose tag name matches the tag name of the token, then

                        generate implied end tags, except for elements with the

                        same tag name as the token. */
                        if ($this->elementInScope($token['name'])) {
                            $this->generateImpliedEndTags(array($token['name']));

                            /* If the current node is not an element with the same

                            tag name as the token, then this is a parse error. */
                            // w/e

                            /* If the stack of open elements has an element in scope

                            whose tag name matches the tag name of the token, then

                            pop elements from this stack until an element with that

                            tag name has been popped from the stack. */
                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
                                if ($this->stack[$n]->nodeName === $token['name']) {
                                    $n = -1;
                                }

                                array_pop($this->stack);
                            }
                        }
                        break;

                    /* An end tag whose tag name is one of: "h1", "h2", "h3", "h4",

                    "h5", "h6" */
                    case 'h1':
                    case 'h2':
                    case 'h3':
                    case 'h4':
                    case 'h5':
                    case 'h6':
                        $elements = array('h1', 'h2', 'h3', 'h4', 'h5', 'h6');

                        /* If the stack of open elements has in scope an element whose

                        tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then

                        generate implied end tags. */
                        if ($this->elementInScope($elements)) {
                            $this->generateImpliedEndTags();

                            /* Now, if the current node is not an element with the same

                            tag name as that of the token, then this is a parse error. */
                            // w/e

                            /* If the stack of open elements has in scope an element

                            whose tag name is one of "h1", "h2", "h3", "h4", "h5", or

                            "h6", then pop elements from the stack until an element

                            with one of those tag names has been popped from the stack. */
                            while ($this->elementInScope($elements)) {
                                array_pop($this->stack);
                            }
                        }
                        break;

                    /* An end tag whose tag name is one of: "a", "b", "big", "em",

                    "font", "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
                    case 'a':
                    case 'b':
                    case 'big':
                    case 'em':
                    case 'font':
                    case 'i':
                    case 'nobr':
                    case 's':
                    case 'small':
                    case 'strike':
                    case 'strong':
                    case 'tt':
                    case 'u':
                        /* 1. Let the formatting element be the last element in

                        the list of active formatting elements that:

                            * is between the end of the list and the last scope

                            marker in the list, if any, or the start of the list

                            otherwise, and

                            * has the same tag name as the token.

                        */
                        while (true) {
                            for ($a = count($this->a_formatting) - 1; $a >= 0; $a--) {
                                if ($this->a_formatting[$a] === self::MARKER) {
                                    break;

                                } elseif ($this->a_formatting[$a]->tagName === $token['name']) {
                                    $formatting_element = $this->a_formatting[$a];
                                    $in_stack = in_array($formatting_element, $this->stack, true);
                                    $fe_af_pos = $a;
                                    break;
                                }
                            }

                            /* If there is no such node, or, if that node is

                            also in the stack of open elements but the element

                            is not in scope, then this is a parse error. Abort

                            these steps. The token is ignored. */
                            if (!isset($formatting_element) || ($in_stack &&
                                    !$this->elementInScope($token['name']))
                            ) {
                                break;

                                /* Otherwise, if there is such a node, but that node

                                is not in the stack of open elements, then this is a

                                parse error; remove the element from the list, and

                                abort these steps. */
                            } elseif (isset($formatting_element) && !$in_stack) {
                                unset($this->a_formatting[$fe_af_pos]);
                                $this->a_formatting = array_merge($this->a_formatting);
                                break;
                            }

                            /* 2. Let the furthest block be the topmost node in the

                            stack of open elements that is lower in the stack

                            than the formatting element, and is not an element in

                            the phrasing or formatting categories. There might

                            not be one. */
                            $fe_s_pos = array_search($formatting_element, $this->stack, true);
                            $length = count($this->stack);

                            for ($s = $fe_s_pos + 1; $s < $length; $s++) {
                                $category = $this->getElementCategory($this->stack[$s]->nodeName);

                                if ($category !== self::PHRASING && $category !== self::FORMATTING) {
                                    $furthest_block = $this->stack[$s];
                                }
                            }

                            /* 3. If there is no furthest block, then the UA must

                            skip the subsequent steps and instead just pop all

                            the nodes from the bottom of the stack of open

                            elements, from the current node up to the formatting

                            element, and remove the formatting element from the

                            list of active formatting elements. */
                            if (!isset($furthest_block)) {
                                for ($n = $length - 1; $n >= $fe_s_pos; $n--) {
                                    array_pop($this->stack);
                                }

                                unset($this->a_formatting[$fe_af_pos]);
                                $this->a_formatting = array_merge($this->a_formatting);
                                break;
                            }

                            /* 4. Let the common ancestor be the element

                            immediately above the formatting element in the stack

                            of open elements. */
                            $common_ancestor = $this->stack[$fe_s_pos - 1];

                            /* 5. If the furthest block has a parent node, then

                            remove the furthest block from its parent node. */
                            if ($furthest_block->parentNode !== null) {
                                $furthest_block->parentNode->removeChild($furthest_block);
                            }

                            /* 6. Let a bookmark note the position of the

                            formatting element in the list of active formatting

                            elements relative to the elements on either side

                            of it in the list. */
                            $bookmark = $fe_af_pos;

                            /* 7. Let node and last node  be the furthest block.

                            Follow these steps: */
                            $node = $furthest_block;
                            $last_node = $furthest_block;

                            while (true) {
                                for ($n = array_search($node, $this->stack, true) - 1; $n >= 0; $n--) {
                                    /* 7.1 Let node be the element immediately

                                    prior to node in the stack of open elements. */
                                    $node = $this->stack[$n];

                                    /* 7.2 If node is not in the list of active

                                    formatting elements, then remove node from

                                    the stack of open elements and then go back

                                    to step 1. */
                                    if (!in_array($node, $this->a_formatting, true)) {
                                        unset($this->stack[$n]);
                                        $this->stack = array_merge($this->stack);

                                    } else {
                                        break;
                                    }
                                }

                                /* 7.3 Otherwise, if node is the formatting

                                element, then go to the next step in the overall

                                algorithm. */
                                if ($node === $formatting_element) {
                                    break;

                                    /* 7.4 Otherwise, if last node is the furthest

                                    block, then move the aforementioned bookmark to

                                    be immediately after the node in the list of

                                    active formatting elements. */
                                } elseif ($last_node === $furthest_block) {
                                    $bookmark = array_search($node, $this->a_formatting, true) + 1;
                                }

                                /* 7.5 If node has any children, perform a

                                shallow clone of node, replace the entry for

                                node in the list of active formatting elements

                                with an entry for the clone, replace the entry

                                for node in the stack of open elements with an

                                entry for the clone, and let node be the clone. */
                                if ($node->hasChildNodes()) {
                                    $clone = $node->cloneNode();
                                    $s_pos = array_search($node, $this->stack, true);
                                    $a_pos = array_search($node, $this->a_formatting, true);

                                    $this->stack[$s_pos] = $clone;
                                    $this->a_formatting[$a_pos] = $clone;
                                    $node = $clone;
                                }

                                /* 7.6 Insert last node into node, first removing

                                it from its previous parent node if any. */
                                if ($last_node->parentNode !== null) {
                                    $last_node->parentNode->removeChild($last_node);
                                }

                                $node->appendChild($last_node);

                                /* 7.7 Let last node be node. */
                                $last_node = $node;
                            }

                            /* 8. Insert whatever last node ended up being in

                            the previous step into the common ancestor node,

                            first removing it from its previous parent node if

                            any. */
                            if ($last_node->parentNode !== null) {
                                $last_node->parentNode->removeChild($last_node);
                            }

                            $common_ancestor->appendChild($last_node);

                            /* 9. Perform a shallow clone of the formatting

                            element. */
                            $clone = $formatting_element->cloneNode();

                            /* 10. Take all of the child nodes of the furthest

                            block and append them to the clone created in the

                            last step. */
                            while ($furthest_block->hasChildNodes()) {
                                $child = $furthest_block->firstChild;
                                $furthest_block->removeChild($child);
                                $clone->appendChild($child);
                            }

                            /* 11. Append that clone to the furthest block. */
                            $furthest_block->appendChild($clone);

                            /* 12. Remove the formatting element from the list

                            of active formatting elements, and insert the clone

                            into the list of active formatting elements at the

                            position of the aforementioned bookmark. */
                            $fe_af_pos = array_search($formatting_element, $this->a_formatting, true);
                            unset($this->a_formatting[$fe_af_pos]);
                            $this->a_formatting = array_merge($this->a_formatting);

                            $af_part1 = array_slice($this->a_formatting, 0, $bookmark - 1);
                            $af_part2 = array_slice($this->a_formatting, $bookmark, count($this->a_formatting));
                            $this->a_formatting = array_merge($af_part1, array($clone), $af_part2);

                            /* 13. Remove the formatting element from the stack

                            of open elements, and insert the clone into the stack

                            of open elements immediately after (i.e. in a more

                            deeply nested position than) the position of the

                            furthest block in that stack. */
                            $fe_s_pos = array_search($formatting_element, $this->stack, true);
                            $fb_s_pos = array_search($furthest_block, $this->stack, true);
                            unset($this->stack[$fe_s_pos]);

                            $s_part1 = array_slice($this->stack, 0, $fb_s_pos);
                            $s_part2 = array_slice($this->stack, $fb_s_pos + 1, count($this->stack));
                            $this->stack = array_merge($s_part1, array($clone), $s_part2);

                            /* 14. Jump back to step 1 in this series of steps. */
                            unset($formatting_element, $fe_af_pos, $fe_s_pos, $furthest_block);
                        }
                        break;

                    /* An end tag token whose tag name is one of: "button",

                    "marquee", "object" */
                    case 'button':
                    case 'marquee':
                    case 'object':
                        /* If the stack of open elements has an element in scope whose

                        tag name matches the tag name of the token, then generate implied

                        tags. */
                        if ($this->elementInScope($token['name'])) {
                            $this->generateImpliedEndTags();

                            /* Now, if the current node is not an element with the same

                            tag name as the token, then this is a parse error. */
                            // k

                            /* Now, if the stack of open elements has an element in scope

                            whose tag name matches the tag name of the token, then pop

                            elements from the stack until that element has been popped from

                            the stack, and clear the list of active formatting elements up

                            to the last marker. */
                            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
                                if ($this->stack[$n]->nodeName === $token['name']) {
                                    $n = -1;
                                }

                                array_pop($this->stack);
                            }

                            $marker = end(array_keys($this->a_formatting, self::MARKER, true));

                            for ($n = count($this->a_formatting) - 1; $n > $marker; $n--) {
                                array_pop($this->a_formatting);
                            }
                        }
                        break;

                    /* Or an end tag whose tag name is one of: "area", "basefont",

                    "bgsound", "br", "embed", "hr", "iframe", "image", "img",

                    "input", "isindex", "noembed", "noframes", "param", "select",

                    "spacer", "table", "textarea", "wbr" */
                    case 'area':
                    case 'basefont':
                    case 'bgsound':
                    case 'br':
                    case 'embed':
                    case 'hr':
                    case 'iframe':
                    case 'image':
                    case 'img':
                    case 'input':
                    case 'isindex':
                    case 'noembed':
                    case 'noframes':
                    case 'param':
                    case 'select':
                    case 'spacer':
                    case 'table':
                    case 'textarea':
                    case 'wbr':
                        // Parse error. Ignore the token.
                        break;

                    /* An end tag token not covered by the previous entries */
                    default:
                        for ($n = count($this->stack) - 1; $n >= 0; $n--) {
                            /* Initialise node to be the current node (the bottommost

                            node of the stack). */
                            $node = end($this->stack);

                            /* If node has the same tag name as the end tag token,

                            then: */
                            if ($token['name'] === $node->nodeName) {
                                /* Generate implied end tags. */
                                $this->generateImpliedEndTags();

                                /* If the tag name of the end tag token does not

                                match the tag name of the current node, this is a

                                parse error. */
                                // k

                                /* Pop all the nodes from the current node up to

                                node, including node, then stop this algorithm. */
                                for ($x = count($this->stack) - $n; $x >= $n; $x--) {
                                    array_pop($this->stack);
                                }

                            } else {
                                $category = $this->getElementCategory($node);

                                if ($category !== self::SPECIAL && $category !== self::SCOPING) {
                                    /* Otherwise, if node is in neither the formatting

                                    category nor the phrasing category, then this is a

                                    parse error. Stop this algorithm. The end tag token

                                    is ignored. */
                                    return false;
                                }
                            }
                        }
                        break;
                }
                break;
        }
    }

    private function inTable($token)

    {
        $clear = array('html', 'table');

        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        or U+0020 SPACE */
        if ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Append the character to the current node. */
            $text = $this->dom->createTextNode($token['data']);
            end($this->stack)->appendChild($text);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data

            attribute set to the data given in the comment token. */
            $comment = $this->dom->createComment($token['data']);
            end($this->stack)->appendChild($comment);

            /* A start tag whose tag name is "caption" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            $token['name'] === 'caption'
        ) {
            /* Clear the stack back to a table context. */
            $this->clearStackToTableContext($clear);

            /* Insert a marker at the end of the list of active

            formatting elements. */
            $this->a_formatting[] = self::MARKER;

            /* Insert an HTML element for the token, then switch the

            insertion mode to "in caption". */
            $this->insertElement($token);
            $this->mode = self::IN_CAPTION;

            /* A start tag whose tag name is "colgroup" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            $token['name'] === 'colgroup'
        ) {
            /* Clear the stack back to a table context. */
            $this->clearStackToTableContext($clear);

            /* Insert an HTML element for the token, then switch the

            insertion mode to "in column group". */
            $this->insertElement($token);
            $this->mode = self::IN_CGROUP;

            /* A start tag whose tag name is "col" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            $token['name'] === 'col'
        ) {
            $this->inTable(
                array(
                    'name' => 'colgroup',
                    'type' => HTML5::STARTTAG,
                    'attr' => array()
                )
            );

            $this->inColumnGroup($token);

            /* A start tag whose tag name is one of: "tbody", "tfoot", "thead" */
        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
                $token['name'],
                array('tbody', 'tfoot', 'thead')
            )
        ) {
            /* Clear the stack back to a table context. */
            $this->clearStackToTableContext($clear);

            /* Insert an HTML element for the token, then switch the insertion

            mode to "in table body". */
            $this->insertElement($token);
            $this->mode = self::IN_TBODY;

            /* A start tag whose tag name is one of: "td", "th", "tr" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            in_array($token['name'], array('td', 'th', 'tr'))
        ) {
            /* Act as if a start tag token with the tag name "tbody" had been

            seen, then reprocess the current token. */
            $this->inTable(
                array(
                    'name' => 'tbody',
                    'type' => HTML5::STARTTAG,
                    'attr' => array()
                )
            );

            return $this->inTableBody($token);

            /* A start tag whose tag name is "table" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            $token['name'] === 'table'
        ) {
            /* Parse error. Act as if an end tag token with the tag name "table"

            had been seen, then, if that token wasn't ignored, reprocess the

            current token. */
            $this->inTable(
                array(
                    'name' => 'table',
                    'type' => HTML5::ENDTAG
                )
            );

            return $this->mainPhase($token);

            /* An end tag whose tag name is "table" */
        } elseif ($token['type'] === HTML5::ENDTAG &&
            $token['name'] === 'table'
        ) {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as the token, this is a parse error.

            Ignore the token. (innerHTML case) */
            if (!$this->elementInScope($token['name'], true)) {
                return false;

                /* Otherwise: */
            } else {
                /* Generate implied end tags. */
                $this->generateImpliedEndTags();

                /* Now, if the current node is not a table element, then this

                is a parse error. */
                // w/e

                /* Pop elements from this stack until a table element has been

                popped from the stack. */
                while (true) {
                    $current = end($this->stack)->nodeName;
                    array_pop($this->stack);

                    if ($current === 'table') {
                        break;
                    }
                }

                /* Reset the insertion mode appropriately. */
                $this->resetInsertionMode();
            }

            /* An end tag whose tag name is one of: "body", "caption", "col",

            "colgroup", "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
                $token['name'],
                array(
                    'body',
                    'caption',
                    'col',
                    'colgroup',
                    'html',
                    'tbody',
                    'td',
                    'tfoot',
                    'th',
                    'thead',
                    'tr'
                )
            )
        ) {
            // Parse error. Ignore the token.

            /* Anything else */
        } else {
            /* Parse error. Process the token as if the insertion mode was "in

            body", with the following exception: */

            /* If the current node is a table, tbody, tfoot, thead, or tr

            element, then, whenever a node would be inserted into the current

            node, it must instead be inserted into the foster parent element. */
            if (in_array(
                end($this->stack)->nodeName,
                array('table', 'tbody', 'tfoot', 'thead', 'tr')
            )
            ) {
                /* The foster parent element is the parent element of the last

                table element in the stack of open elements, if there is a

                table element and it has such a parent element. If there is no

                table element in the stack of open elements (innerHTML case),

                then the foster parent element is the first element in the

                stack of open elements (the html  element). Otherwise, if there

                is a table element in the stack of open elements, but the last

                table element in the stack of open elements has no parent, or

                its parent node is not an element, then the foster parent

                element is the element before the last table element in the

                stack of open elements. */
                for ($n = count($this->stack) - 1; $n >= 0; $n--) {
                    if ($this->stack[$n]->nodeName === 'table') {
                        $table = $this->stack[$n];
                        break;
                    }
                }

                if (isset($table) && $table->parentNode !== null) {
                    $this->foster_parent = $table->parentNode;

                } elseif (!isset($table)) {
                    $this->foster_parent = $this->stack[0];

                } elseif (isset($table) && ($table->parentNode === null ||
                        $table->parentNode->nodeType !== XML_ELEMENT_NODE)
                ) {
                    $this->foster_parent = $this->stack[$n - 1];
                }
            }

            $this->inBody($token);
        }
    }

    private function inCaption($token)

    {
        /* An end tag whose tag name is "caption" */
        if ($token['type'] === HTML5::ENDTAG && $token['name'] === 'caption') {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as the token, this is a parse error.

            Ignore the token. (innerHTML case) */
            if (!$this->elementInScope($token['name'], true)) {
                // Ignore

                /* Otherwise: */
            } else {
                /* Generate implied end tags. */
                $this->generateImpliedEndTags();

                /* Now, if the current node is not a caption element, then this

                is a parse error. */
                // w/e

                /* Pop elements from this stack until a caption element has

                been popped from the stack. */
                while (true) {
                    $node = end($this->stack)->nodeName;
                    array_pop($this->stack);

                    if ($node === 'caption') {
                        break;
                    }
                }

                /* Clear the list of active formatting elements up to the last

                marker. */
                $this->clearTheActiveFormattingElementsUpToTheLastMarker();

                /* Switch the insertion mode to "in table". */
                $this->mode = self::IN_TABLE;
            }

            /* A start tag whose tag name is one of: "caption", "col", "colgroup",

            "tbody", "td", "tfoot", "th", "thead", "tr", or an end tag whose tag

            name is "table" */
        } elseif (($token['type'] === HTML5::STARTTAG && in_array(
                    $token['name'],
                    array(
                        'caption',
                        'col',
                        'colgroup',
                        'tbody',
                        'td',
                        'tfoot',
                        'th',
                        'thead',
                        'tr'
                    )
                )) || ($token['type'] === HTML5::ENDTAG &&
                $token['name'] === 'table')
        ) {
            /* Parse error. Act as if an end tag with the tag name "caption"

            had been seen, then, if that token wasn't ignored, reprocess the

            current token. */
            $this->inCaption(
                array(
                    'name' => 'caption',
                    'type' => HTML5::ENDTAG
                )
            );

            return $this->inTable($token);

            /* An end tag whose tag name is one of: "body", "col", "colgroup",

            "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
                $token['name'],
                array(
                    'body',
                    'col',
                    'colgroup',
                    'html',
                    'tbody',
                    'tfoot',
                    'th',
                    'thead',
                    'tr'
                )
            )
        ) {
            // Parse error. Ignore the token.

            /* Anything else */
        } else {
            /* Process the token as if the insertion mode was "in body". */
            $this->inBody($token);
        }
    }

    private function inColumnGroup($token)

    {
        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        or U+0020 SPACE */
        if ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Append the character to the current node. */
            $text = $this->dom->createTextNode($token['data']);
            end($this->stack)->appendChild($text);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data

            attribute set to the data given in the comment token. */
            $comment = $this->dom->createComment($token['data']);
            end($this->stack)->appendChild($comment);

            /* A start tag whose tag name is "col" */
        } elseif ($token['type'] === HTML5::STARTTAG && $token['name'] === 'col') {
            /* Insert a col element for the token. Immediately pop the current

            node off the stack of open elements. */
            $this->insertElement($token);
            array_pop($this->stack);

            /* An end tag whose tag name is "colgroup" */
        } elseif ($token['type'] === HTML5::ENDTAG &&
            $token['name'] === 'colgroup'
        ) {
            /* If the current node is the root html element, then this is a

            parse error, ignore the token. (innerHTML case) */
            if (end($this->stack)->nodeName === 'html') {
                // Ignore

                /* Otherwise, pop the current node (which will be a colgroup

                element) from the stack of open elements. Switch the insertion

                mode to "in table". */
            } else {
                array_pop($this->stack);
                $this->mode = self::IN_TABLE;
            }

            /* An end tag whose tag name is "col" */
        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'col') {
            /* Parse error. Ignore the token. */

            /* Anything else */
        } else {
            /* Act as if an end tag with the tag name "colgroup" had been seen,

            and then, if that token wasn't ignored, reprocess the current token. */
            $this->inColumnGroup(
                array(
                    'name' => 'colgroup',
                    'type' => HTML5::ENDTAG
                )
            );

            return $this->inTable($token);
        }
    }

    private function inTableBody($token)

    {
        $clear = array('tbody', 'tfoot', 'thead', 'html');

        /* A start tag whose tag name is "tr" */
        if ($token['type'] === HTML5::STARTTAG && $token['name'] === 'tr') {
            /* Clear the stack back to a table body context. */
            $this->clearStackToTableContext($clear);

            /* Insert a tr element for the token, then switch the insertion

            mode to "in row". */
            $this->insertElement($token);
            $this->mode = self::IN_ROW;

            /* A start tag whose tag name is one of: "th", "td" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            ($token['name'] === 'th' || $token['name'] === 'td')
        ) {
            /* Parse error. Act as if a start tag with the tag name "tr" had

            been seen, then reprocess the current token. */
            $this->inTableBody(
                array(
                    'name' => 'tr',
                    'type' => HTML5::STARTTAG,
                    'attr' => array()
                )
            );

            return $this->inRow($token);

            /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
        } elseif ($token['type'] === HTML5::ENDTAG &&
            in_array($token['name'], array('tbody', 'tfoot', 'thead'))
        ) {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as the token, this is a parse error.

            Ignore the token. */
            if (!$this->elementInScope($token['name'], true)) {
                // Ignore

                /* Otherwise: */
            } else {
                /* Clear the stack back to a table body context. */
                $this->clearStackToTableContext($clear);

                /* Pop the current node from the stack of open elements. Switch

                the insertion mode to "in table". */
                array_pop($this->stack);
                $this->mode = self::IN_TABLE;
            }

            /* A start tag whose tag name is one of: "caption", "col", "colgroup",

            "tbody", "tfoot", "thead", or an end tag whose tag name is "table" */
        } elseif (($token['type'] === HTML5::STARTTAG && in_array(
                    $token['name'],
                    array('caption', 'col', 'colgroup', 'tbody', 'tfoor', 'thead')
                )) ||
            ($token['type'] === HTML5::STARTTAG && $token['name'] === 'table')
        ) {
            /* If the stack of open elements does not have a tbody, thead, or

            tfoot element in table scope, this is a parse error. Ignore the

            token. (innerHTML case) */
            if (!$this->elementInScope(array('tbody', 'thead', 'tfoot'), true)) {
                // Ignore.

                /* Otherwise: */
            } else {
                /* Clear the stack back to a table body context. */
                $this->clearStackToTableContext($clear);

                /* Act as if an end tag with the same tag name as the current

                node ("tbody", "tfoot", or "thead") had been seen, then

                reprocess the current token. */
                $this->inTableBody(
                    array(
                        'name' => end($this->stack)->nodeName,
                        'type' => HTML5::ENDTAG
                    )
                );

                return $this->mainPhase($token);
            }

            /* An end tag whose tag name is one of: "body", "caption", "col",

            "colgroup", "html", "td", "th", "tr" */
        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
                $token['name'],
                array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr')
            )
        ) {
            /* Parse error. Ignore the token. */

            /* Anything else */
        } else {
            /* Process the token as if the insertion mode was "in table". */
            $this->inTable($token);
        }
    }

    private function inRow($token)

    {
        $clear = array('tr', 'html');

        /* A start tag whose tag name is one of: "th", "td" */
        if ($token['type'] === HTML5::STARTTAG &&
            ($token['name'] === 'th' || $token['name'] === 'td')
        ) {
            /* Clear the stack back to a table row context. */
            $this->clearStackToTableContext($clear);

            /* Insert an HTML element for the token, then switch the insertion

            mode to "in cell". */
            $this->insertElement($token);
            $this->mode = self::IN_CELL;

            /* Insert a marker at the end of the list of active formatting

            elements. */
            $this->a_formatting[] = self::MARKER;

            /* An end tag whose tag name is "tr" */
        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'tr') {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as the token, this is a parse error.

            Ignore the token. (innerHTML case) */
            if (!$this->elementInScope($token['name'], true)) {
                // Ignore.

                /* Otherwise: */
            } else {
                /* Clear the stack back to a table row context. */
                $this->clearStackToTableContext($clear);

                /* Pop the current node (which will be a tr element) from the

                stack of open elements. Switch the insertion mode to "in table

                body". */
                array_pop($this->stack);
                $this->mode = self::IN_TBODY;
            }

            /* A start tag whose tag name is one of: "caption", "col", "colgroup",

            "tbody", "tfoot", "thead", "tr" or an end tag whose tag name is "table" */
        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
                $token['name'],
                array('caption', 'col', 'colgroup', 'tbody', 'tfoot', 'thead', 'tr')
            )
        ) {
            /* Act as if an end tag with the tag name "tr" had been seen, then,

            if that token wasn't ignored, reprocess the current token. */
            $this->inRow(
                array(
                    'name' => 'tr',
                    'type' => HTML5::ENDTAG
                )
            );

            return $this->inCell($token);

            /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
        } elseif ($token['type'] === HTML5::ENDTAG &&
            in_array($token['name'], array('tbody', 'tfoot', 'thead'))
        ) {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as the token, this is a parse error.

            Ignore the token. */
            if (!$this->elementInScope($token['name'], true)) {
                // Ignore.

                /* Otherwise: */
            } else {
                /* Otherwise, act as if an end tag with the tag name "tr" had

                been seen, then reprocess the current token. */
                $this->inRow(
                    array(
                        'name' => 'tr',
                        'type' => HTML5::ENDTAG
                    )
                );

                return $this->inCell($token);
            }

            /* An end tag whose tag name is one of: "body", "caption", "col",

            "colgroup", "html", "td", "th" */
        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
                $token['name'],
                array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr')
            )
        ) {
            /* Parse error. Ignore the token. */

            /* Anything else */
        } else {
            /* Process the token as if the insertion mode was "in table". */
            $this->inTable($token);
        }
    }

    private function inCell($token)

    {
        /* An end tag whose tag name is one of: "td", "th" */
        if ($token['type'] === HTML5::ENDTAG &&
            ($token['name'] === 'td' || $token['name'] === 'th')
        ) {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as that of the token, then this is a

            parse error and the token must be ignored. */
            if (!$this->elementInScope($token['name'], true)) {
                // Ignore.

                /* Otherwise: */
            } else {
                /* Generate implied end tags, except for elements with the same

                tag name as the token. */
                $this->generateImpliedEndTags(array($token['name']));

                /* Now, if the current node is not an element with the same tag

                name as the token, then this is a parse error. */
                // k

                /* Pop elements from this stack until an element with the same

                tag name as the token has been popped from the stack. */
                while (true) {
                    $node = end($this->stack)->nodeName;
                    array_pop($this->stack);

                    if ($node === $token['name']) {
                        break;
                    }
                }

                /* Clear the list of active formatting elements up to the last

                marker. */
                $this->clearTheActiveFormattingElementsUpToTheLastMarker();

                /* Switch the insertion mode to "in row". (The current node

                will be a tr element at this point.) */
                $this->mode = self::IN_ROW;
            }

            /* A start tag whose tag name is one of: "caption", "col", "colgroup",

            "tbody", "td", "tfoot", "th", "thead", "tr" */
        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
                $token['name'],
                array(
                    'caption',
                    'col',
                    'colgroup',
                    'tbody',
                    'td',
                    'tfoot',
                    'th',
                    'thead',
                    'tr'
                )
            )
        ) {
            /* If the stack of open elements does not have a td or th element

            in table scope, then this is a parse error; ignore the token.

            (innerHTML case) */
            if (!$this->elementInScope(array('td', 'th'), true)) {
                // Ignore.

                /* Otherwise, close the cell (see below) and reprocess the current

                token. */
            } else {
                $this->closeCell();
                return $this->inRow($token);
            }

            /* A start tag whose tag name is one of: "caption", "col", "colgroup",

            "tbody", "td", "tfoot", "th", "thead", "tr" */
        } elseif ($token['type'] === HTML5::STARTTAG && in_array(
                $token['name'],
                array(
                    'caption',
                    'col',
                    'colgroup',
                    'tbody',
                    'td',
                    'tfoot',
                    'th',
                    'thead',
                    'tr'
                )
            )
        ) {
            /* If the stack of open elements does not have a td or th element

            in table scope, then this is a parse error; ignore the token.

            (innerHTML case) */
            if (!$this->elementInScope(array('td', 'th'), true)) {
                // Ignore.

                /* Otherwise, close the cell (see below) and reprocess the current

                token. */
            } else {
                $this->closeCell();
                return $this->inRow($token);
            }

            /* An end tag whose tag name is one of: "body", "caption", "col",

            "colgroup", "html" */
        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
                $token['name'],
                array('body', 'caption', 'col', 'colgroup', 'html')
            )
        ) {
            /* Parse error. Ignore the token. */

            /* An end tag whose tag name is one of: "table", "tbody", "tfoot",

            "thead", "tr" */
        } elseif ($token['type'] === HTML5::ENDTAG && in_array(
                $token['name'],
                array('table', 'tbody', 'tfoot', 'thead', 'tr')
            )
        ) {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as that of the token (which can only

            happen for "tbody", "tfoot" and "thead", or, in the innerHTML case),

            then this is a parse error and the token must be ignored. */
            if (!$this->elementInScope($token['name'], true)) {
                // Ignore.

                /* Otherwise, close the cell (see below) and reprocess the current

                token. */
            } else {
                $this->closeCell();
                return $this->inRow($token);
            }

            /* Anything else */
        } else {
            /* Process the token as if the insertion mode was "in body". */
            $this->inBody($token);
        }
    }

    private function inSelect($token)

    {
        /* Handle the token as follows: */

        /* A character token */
        if ($token['type'] === HTML5::CHARACTR) {
            /* Append the token's character to the current node. */
            $this->insertText($token['data']);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data

            attribute set to the data given in the comment token. */
            $this->insertComment($token['data']);

            /* A start tag token whose tag name is "option" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            $token['name'] === 'option'
        ) {
            /* If the current node is an option element, act as if an end tag

            with the tag name "option" had been seen. */
            if (end($this->stack)->nodeName === 'option') {
                $this->inSelect(
                    array(
                        'name' => 'option',
                        'type' => HTML5::ENDTAG
                    )
                );
            }

            /* Insert an HTML element for the token. */
            $this->insertElement($token);

            /* A start tag token whose tag name is "optgroup" */
        } elseif ($token['type'] === HTML5::STARTTAG &&
            $token['name'] === 'optgroup'
        ) {
            /* If the current node is an option element, act as if an end tag

            with the tag name "option" had been seen. */
            if (end($this->stack)->nodeName === 'option') {
                $this->inSelect(
                    array(
                        'name' => 'option',
                        'type' => HTML5::ENDTAG
                    )
                );
            }

            /* If the current node is an optgroup element, act as if an end tag

            with the tag name "optgroup" had been seen. */
            if (end($this->stack)->nodeName === 'optgroup') {
                $this->inSelect(
                    array(
                        'name' => 'optgroup',
                        'type' => HTML5::ENDTAG
                    )
                );
            }

            /* Insert an HTML element for the token. */
            $this->insertElement($token);

            /* An end tag token whose tag name is "optgroup" */
        } elseif ($token['type'] === HTML5::ENDTAG &&
            $token['name'] === 'optgroup'
        ) {
            /* First, if the current node is an option element, and the node

            immediately before it in the stack of open elements is an optgroup

            element, then act as if an end tag with the tag name "option" had

            been seen. */
            $elements_in_stack = count($this->stack);

            if ($this->stack[$elements_in_stack - 1]->nodeName === 'option' &&
                $this->stack[$elements_in_stack - 2]->nodeName === 'optgroup'
            ) {
                $this->inSelect(
                    array(
                        'name' => 'option',
                        'type' => HTML5::ENDTAG
                    )
                );
            }

            /* If the current node is an optgroup element, then pop that node

            from the stack of open elements. Otherwise, this is a parse error,

            ignore the token. */
            if ($this->stack[$elements_in_stack - 1] === 'optgroup') {
                array_pop($this->stack);
            }

            /* An end tag token whose tag name is "option" */
        } elseif ($token['type'] === HTML5::ENDTAG &&
            $token['name'] === 'option'
        ) {
            /* If the current node is an option element, then pop that node

            from the stack of open elements. Otherwise, this is a parse error,

            ignore the token. */
            if (end($this->stack)->nodeName === 'option') {
                array_pop($this->stack);
            }

            /* An end tag whose tag name is "select" */
        } elseif ($token['type'] === HTML5::ENDTAG &&
            $token['name'] === 'select'
        ) {
            /* If the stack of open elements does not have an element in table

            scope with the same tag name as the token, this is a parse error.

            Ignore the token. (innerHTML case) */
            if (!$this->elementInScope($token['name'], true)) {
                // w/e

                /* Otherwise: */
            } else {
                /* Pop elements from the stack of open elements until a select

                element has been popped from the stack. */
                while (true) {
                    $current = end($this->stack)->nodeName;
                    array_pop($this->stack);

                    if ($current === 'select') {
                        break;
                    }
                }

                /* Reset the insertion mode appropriately. */
                $this->resetInsertionMode();
            }

            /* A start tag whose tag name is "select" */
        } elseif ($token['name'] === 'select' &&
            $token['type'] === HTML5::STARTTAG
        ) {
            /* Parse error. Act as if the token had been an end tag with the

            tag name "select" instead. */
            $this->inSelect(
                array(
                    'name' => 'select',
                    'type' => HTML5::ENDTAG
                )
            );

            /* An end tag whose tag name is one of: "caption", "table", "tbody",

            "tfoot", "thead", "tr", "td", "th" */
        } elseif (in_array(
                $token['name'],
                array(
                    'caption',
                    'table',
                    'tbody',
                    'tfoot',
                    'thead',
                    'tr',
                    'td',
                    'th'
                )
            ) && $token['type'] === HTML5::ENDTAG
        ) {
            /* Parse error. */
            // w/e

            /* If the stack of open elements has an element in table scope with

            the same tag name as that of the token, then act as if an end tag

            with the tag name "select" had been seen, and reprocess the token.

            Otherwise, ignore the token. */
            if ($this->elementInScope($token['name'], true)) {
                $this->inSelect(
                    array(
                        'name' => 'select',
                        'type' => HTML5::ENDTAG
                    )
                );

                $this->mainPhase($token);
            }

            /* Anything else */
        } else {
            /* Parse error. Ignore the token. */
        }
    }

    private function afterBody($token)

    {
        /* Handle the token as follows: */

        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        or U+0020 SPACE */
        if ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Process the token as it would be processed if the insertion mode

            was "in body". */
            $this->inBody($token);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the first element in the stack of open

            elements (the html element), with the data attribute set to the

            data given in the comment token. */
            $comment = $this->dom->createComment($token['data']);
            $this->stack[0]->appendChild($comment);

            /* An end tag with the tag name "html" */
        } elseif ($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') {
            /* If the parser was originally created in order to handle the

            setting of an element's innerHTML attribute, this is a parse error;

            ignore the token. (The element will be an html element in this

            case.) (innerHTML case) */

            /* Otherwise, switch to the trailing end phase. */
            $this->phase = self::END_PHASE;

            /* Anything else */
        } else {
            /* Parse error. Set the insertion mode to "in body" and reprocess

            the token. */
            $this->mode = self::IN_BODY;
            return $this->inBody($token);
        }
    }

    private function inFrameset($token)

    {
        /* Handle the token as follows: */

        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
        if ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Append the character to the current node. */
            $this->insertText($token['data']);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data

            attribute set to the data given in the comment token. */
            $this->insertComment($token['data']);

            /* A start tag with the tag name "frameset" */
        } elseif ($token['name'] === 'frameset' &&
            $token['type'] === HTML5::STARTTAG
        ) {
            $this->insertElement($token);

            /* An end tag with the tag name "frameset" */
        } elseif ($token['name'] === 'frameset' &&
            $token['type'] === HTML5::ENDTAG
        ) {
            /* If the current node is the root html element, then this is a

            parse error; ignore the token. (innerHTML case) */
            if (end($this->stack)->nodeName === 'html') {
                // Ignore

            } else {
                /* Otherwise, pop the current node from the stack of open

                elements. */
                array_pop($this->stack);

                /* If the parser was not originally created in order to handle

                the setting of an element's innerHTML attribute (innerHTML case),

                and the current node is no longer a frameset element, then change

                the insertion mode to "after frameset". */
                $this->mode = self::AFTR_FRAME;
            }

            /* A start tag with the tag name "frame" */
        } elseif ($token['name'] === 'frame' &&
            $token['type'] === HTML5::STARTTAG
        ) {
            /* Insert an HTML element for the token. */
            $this->insertElement($token);

            /* Immediately pop the current node off the stack of open elements. */
            array_pop($this->stack);

            /* A start tag with the tag name "noframes" */
        } elseif ($token['name'] === 'noframes' &&
            $token['type'] === HTML5::STARTTAG
        ) {
            /* Process the token as if the insertion mode had been "in body". */
            $this->inBody($token);

            /* Anything else */
        } else {
            /* Parse error. Ignore the token. */
        }
    }

    private function afterFrameset($token)

    {
        /* Handle the token as follows: */

        /* A character token that is one of one of U+0009 CHARACTER TABULATION,

        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
        if ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Append the character to the current node. */
            $this->insertText($token['data']);

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the current node with the data

            attribute set to the data given in the comment token. */
            $this->insertComment($token['data']);

            /* An end tag with the tag name "html" */
        } elseif ($token['name'] === 'html' &&
            $token['type'] === HTML5::ENDTAG
        ) {
            /* Switch to the trailing end phase. */
            $this->phase = self::END_PHASE;

            /* A start tag with the tag name "noframes" */
        } elseif ($token['name'] === 'noframes' &&
            $token['type'] === HTML5::STARTTAG
        ) {
            /* Process the token as if the insertion mode had been "in body". */
            $this->inBody($token);

            /* Anything else */
        } else {
            /* Parse error. Ignore the token. */
        }
    }

    private function trailingEndPhase($token)

    {
        /* After the main phase, as each token is emitted from the tokenisation

        stage, it must be processed as described in this section. */

        /* A DOCTYPE token */
        if ($token['type'] === HTML5::DOCTYPE) {
            // Parse error. Ignore the token.

            /* A comment token */
        } elseif ($token['type'] === HTML5::COMMENT) {
            /* Append a Comment node to the Document object with the data

            attribute set to the data given in the comment token. */
            $comment = $this->dom->createComment($token['data']);
            $this->dom->appendChild($comment);

            /* A character token that is one of one of U+0009 CHARACTER TABULATION,

            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

            or U+0020 SPACE */
        } elseif ($token['type'] === HTML5::CHARACTR &&
            preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])
        ) {
            /* Process the token as it would be processed in the main phase. */
            $this->mainPhase($token);

            /* A character token that is not one of U+0009 CHARACTER TABULATION,

            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),

            or U+0020 SPACE. Or a start tag token. Or an end tag token. */
        } elseif (($token['type'] === HTML5::CHARACTR &&
                preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
            $token['type'] === HTML5::STARTTAG || $token['type'] === HTML5::ENDTAG
        ) {
            /* Parse error. Switch back to the main phase and reprocess the

            token. */
            $this->phase = self::MAIN_PHASE;
            return $this->mainPhase($token);

            /* An end-of-file token */
        } elseif ($token['type'] === HTML5::EOF) {
            /* OMG DONE!! */
        }
    }

    private function insertElement($token, $append = true, $check = false)

    {
        // Proprietary workaround for libxml2's limitations with tag names
        if ($check) {
            // Slightly modified HTML5 tag-name modification,
            // removing anything that's not an ASCII letter, digit, or hyphen
            $token['name'] = preg_replace('/[^a-z0-9-]/i', '', $token['name']);
            // Remove leading hyphens and numbers
            $token['name'] = ltrim($token['name'], '-0..9');
            // In theory, this should ever be needed, but just in case
            if ($token['name'] === '') {
                $token['name'] = 'span';
            } // arbitrary generic choice
        }

        $el = $this->dom->createElement($token['name']);

        foreach ($token['attr'] as $attr) {
            if (!$el->hasAttribute($attr['name'])) {
                $el->setAttribute($attr['name'], $attr['value']);
            }
        }

        $this->appendToRealParent($el);
        $this->stack[] = $el;

        return $el;
    }

    private function insertText($data)

    {
        $text = $this->dom->createTextNode($data);
        $this->appendToRealParent($text);
    }

    private function insertComment($data)

    {
        $comment = $this->dom->createComment($data);
        $this->appendToRealParent($comment);
    }

    private function appendToRealParent($node)

    {
        if ($this->foster_parent === null) {
            end($this->stack)->appendChild($node);

        } elseif ($this->foster_parent !== null) {
            /* If the foster parent element is the parent element of the

            last table element in the stack of open elements, then the new

            node must be inserted immediately before the last table element

            in the stack of open elements in the foster parent element;

            otherwise, the new node must be appended to the foster parent

            element. */
            for ($n = count($this->stack) - 1; $n >= 0; $n--) {
                if ($this->stack[$n]->nodeName === 'table' &&
                    $this->stack[$n]->parentNode !== null
                ) {
                    $table = $this->stack[$n];
                    break;
                }
            }

            if (isset($table) && $this->foster_parent->isSameNode($table->parentNode)) {
                $this->foster_parent->insertBefore($node, $table);
            } else {
                $this->foster_parent->appendChild($node);
            }

            $this->foster_parent = null;
        }
    }

    private function elementInScope($el, $table = false)

    {
        if (is_array($el)) {
            foreach ($el as $element) {
                if ($this->elementInScope($element, $table)) {
                    return true;
                }
            }

            return false;
        }

        $leng = count($this->stack);

        for ($n = 0; $n < $leng; $n++) {
            /* 1. Initialise node to be the current node (the bottommost node of

            the stack). */
            $node = $this->stack[$leng - 1 - $n];

            if ($node->tagName === $el) {
                /* 2. If node is the target node, terminate in a match state. */
                return true;

            } elseif ($node->tagName === 'table') {
                /* 3. Otherwise, if node is a table element, terminate in a failure

                state. */
                return false;

            } elseif ($table === true && in_array(
                    $node->tagName,
                    array(
                        'caption',
                        'td',
                        'th',
                        'button',
                        'marquee',
                        'object'
                    )
                )
            ) {
                /* 4. Otherwise, if the algorithm is the "has an element in scope"

                variant (rather than the "has an element in table scope" variant),

                and node is one of the following, terminate in a failure state. */
                return false;

            } elseif ($node === $node->ownerDocument->documentElement) {
                /* 5. Otherwise, if node is an html element (root element), terminate

                in a failure state. (This can only happen if the node is the topmost

                node of the    stack of open elements, and prevents the next step from

                being invoked if there are no more elements in the stack.) */
                return false;
            }

            /* Otherwise, set node to the previous entry in the stack of open

            elements and return to step 2. (This will never fail, since the loop

            will always terminate in the previous step if the top of the stack

            is reached.) */
        }
    }

    private function reconstructActiveFormattingElements()

    {
        /* 1. If there are no entries in the list of active formatting elements,

        then there is nothing to reconstruct; stop this algorithm. */
        $formatting_elements = count($this->a_formatting);

        if ($formatting_elements === 0) {
            return false;
        }

        /* 3. Let entry be the last (most recently added) element in the list

        of active formatting elements. */
        $entry = end($this->a_formatting);

        /* 2. If the last (most recently added) entry in the list of active

        formatting elements is a marker, or if it is an element that is in the

        stack of open elements, then there is nothing to reconstruct; stop this

        algorithm. */
        if ($entry === self::MARKER || in_array($entry, $this->stack, true)) {
            return false;
        }

        for ($a = $formatting_elements - 1; $a >= 0; true) {
            /* 4. If there are no entries before entry in the list of active

            formatting elements, then jump to step 8. */
            if ($a === 0) {
                $step_seven = false;
                break;
            }

            /* 5. Let entry be the entry one earlier than entry in the list of

            active formatting elements. */
            $a--;
            $entry = $this->a_formatting[$a];

            /* 6. If entry is neither a marker nor an element that is also in

            thetack of open elements, go to step 4. */
            if ($entry === self::MARKER || in_array($entry, $this->stack, true)) {
                break;
            }
        }

        while (true) {
            /* 7. Let entry be the element one later than entry in the list of

            active formatting elements. */
            if (isset($step_seven) && $step_seven === true) {
                $a++;
                $entry = $this->a_formatting[$a];
            }

            /* 8. Perform a shallow clone of the element entry to obtain clone. */
            $clone = $entry->cloneNode();

            /* 9. Append clone to the current node and push it onto the stack

            of open elements  so that it is the new current node. */
            end($this->stack)->appendChild($clone);
            $this->stack[] = $clone;

            /* 10. Replace the entry for entry in the list with an entry for

            clone. */
            $this->a_formatting[$a] = $clone;

            /* 11. If the entry for clone in the list of active formatting

            elements is not the last entry in the list, return to step 7. */
            if (end($this->a_formatting) !== $clone) {
                $step_seven = true;
            } else {
                break;
            }
        }
    }

    private function clearTheActiveFormattingElementsUpToTheLastMarker()

    {
        /* When the steps below require the UA to clear the list of active

        formatting elements up to the last marker, the UA must perform the

        following steps: */

        while (true) {
            /* 1. Let entry be the last (most recently added) entry in the list

            of active formatting elements. */
            $entry = end($this->a_formatting);

            /* 2. Remove entry from the list of active formatting elements. */
            array_pop($this->a_formatting);

            /* 3. If entry was a marker, then stop the algorithm at this point.

            The list has been cleared up to the last marker. */
            if ($entry === self::MARKER) {
                break;
            }
        }
    }

    private function generateImpliedEndTags($exclude = array())

    {
        /* When the steps below require the UA to generate implied end tags,

        then, if the current node is a dd element, a dt element, an li element,

        a p element, a td element, a th  element, or a tr element, the UA must

        act as if an end tag with the respective tag name had been seen and

        then generate implied end tags again. */
        $node = end($this->stack);
        $elements = array_diff(array('dd', 'dt', 'li', 'p', 'td', 'th', 'tr'), $exclude);

        while (in_array(end($this->stack)->nodeName, $elements)) {
            array_pop($this->stack);
        }
    }

    private function getElementCategory($node)

    {
        $name = $node->tagName;
        if (in_array($name, $this->special)) {
            return self::SPECIAL;
        } elseif (in_array($name, $this->scoping)) {
            return self::SCOPING;
        } elseif (in_array($name, $this->formatting)) {
            return self::FORMATTING;
        } else {
            return self::PHRASING;
        }
    }

    private function clearStackToTableContext($elements)

    {
        /* When the steps above require the UA to clear the stack back to a

        table context, it means that the UA must, while the current node is not

        a table element or an html element, pop elements from the stack of open

        elements. If this causes any elements to be popped from the stack, then

        this is a parse error. */
        while (true) {
            $node = end($this->stack)->nodeName;

            if (in_array($node, $elements)) {
                break;
            } else {
                array_pop($this->stack);
            }
        }
    }

    private function resetInsertionMode()

    {
        /* 1. Let last be false. */
        $last = false;
        $leng = count($this->stack);

        for ($n = $leng - 1; $n >= 0; $n--) {
            /* 2. Let node be the last node in the stack of open elements. */
            $node = $this->stack[$n];

            /* 3. If node is the first node in the stack of open elements, then

            set last to true. If the element whose innerHTML  attribute is being

            set is neither a td  element nor a th element, then set node to the

            element whose innerHTML  attribute is being set. (innerHTML  case) */
            if ($this->stack[0]->isSameNode($node)) {
                $last = true;
            }

            /* 4. If node is a select element, then switch the insertion mode to

            "in select" and abort these steps. (innerHTML case) */
            if ($node->nodeName === 'select') {
                $this->mode = self::IN_SELECT;
                break;

                /* 5. If node is a td or th element, then switch the insertion mode

                to "in cell" and abort these steps. */
            } elseif ($node->nodeName === 'td' || $node->nodeName === 'th') {
                $this->mode = self::IN_CELL;
                break;

                /* 6. If node is a tr element, then switch the insertion mode to

                "in    row" and abort these steps. */
            } elseif ($node->nodeName === 'tr') {
                $this->mode = self::IN_ROW;
                break;

                /* 7. If node is a tbody, thead, or tfoot element, then switch the

                insertion mode to "in table body" and abort these steps. */
            } elseif (in_array($node->nodeName, array('tbody', 'thead', 'tfoot'))) {
                $this->mode = self::IN_TBODY;
                break;

                /* 8. If node is a caption element, then switch the insertion mode

                to "in caption" and abort these steps. */
            } elseif ($node->nodeName === 'caption') {
                $this->mode = self::IN_CAPTION;
                break;

                /* 9. If node is a colgroup element, then switch the insertion mode

                to "in column group" and abort these steps. (innerHTML case) */
            } elseif ($node->nodeName === 'colgroup') {
                $this->mode = self::IN_CGROUP;
                break;

                /* 10. If node is a table element, then switch the insertion mode

                to "in table" and abort these steps. */
            } elseif ($node->nodeName === 'table') {
                $this->mode = self::IN_TABLE;
                break;

                /* 11. If node is a head element, then switch the insertion mode

                to "in body" ("in body"! not "in head"!) and abort these steps.

                (innerHTML case) */
            } elseif ($node->nodeName === 'head') {
                $this->mode = self::IN_BODY;
                break;

                /* 12. If node is a body element, then switch the insertion mode to

                "in body" and abort these steps. */
            } elseif ($node->nodeName === 'body') {
                $this->mode = self::IN_BODY;
                break;

                /* 13. If node is a frameset element, then switch the insertion

                mode to "in frameset" and abort these steps. (innerHTML case) */
            } elseif ($node->nodeName === 'frameset') {
                $this->mode = self::IN_FRAME;
                break;

                /* 14. If node is an html element, then: if the head element

                pointer is null, switch the insertion mode to "before head",

                otherwise, switch the insertion mode to "after head". In either

                case, abort these steps. (innerHTML case) */
            } elseif ($node->nodeName === 'html') {
                $this->mode = ($this->head_pointer === null)
                    ? self::BEFOR_HEAD
                    : self::AFTER_HEAD;

                break;

                /* 15. If last is true, then set the insertion mode to "in body"

                and    abort these steps. (innerHTML case) */
            } elseif ($last) {
                $this->mode = self::IN_BODY;
                break;
            }
        }
    }

    private function closeCell()

    {
        /* If the stack of open elements has a td or th element in table scope,

        then act as if an end tag token with that tag name had been seen. */
        foreach (array('td', 'th') as $cell) {
            if ($this->elementInScope($cell, true)) {
                $this->inCell(
                    array(
                        'name' => $cell,
                        'type' => HTML5::ENDTAG
                    )
                );

                break;
            }
        }
    }

    public function save()

    {
        return $this->dom;
    }
}