|
楼主 |
发表于 2013-1-20 03:16:43
|
显示全部楼层
303718 发表于 2013-1-19 09:16
是删除掉这两行代码吗?为何我打开这个文件里面CTRL+F没有发现这2句话呢,我是3.4.2版本
我逐个手动查看也没有啊
整个文件代码如下:- <?php
- /**
- * kses 0.2.2 - HTML/XHTML filter that only allows some elements and attributes
- * Copyright (C) 2002, 2003, 2005 Ulf Harnhammar
- *
- * This program is free software and open source software; you can redistribute
- * it and/or modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the License,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- * http://www.gnu.org/licenses/gpl.html
- *
- * [kses strips evil scripts!]
- *
- * Added wp_ prefix to avoid conflicts with existing kses users
- *
- * @version 0.2.2
- * @copyright (C) 2002, 2003, 2005
- * @author Ulf Harnhammar <http://advogato.org/person/metaur/>
- *
- * @package External
- * @subpackage KSES
- *
- */
- /**
- * You can override this in a plugin.
- *
- * @since 1.2.0
- */
- if ( ! defined( 'CUSTOM_TAGS' ) )
- define( 'CUSTOM_TAGS', false );
- if ( ! CUSTOM_TAGS ) {
- /**
- * Kses global for default allowable HTML tags.
- *
- * Can be override by using CUSTOM_TAGS constant.
- *
- * @global array $allowedposttags
- * @since 2.0.0
- */
- $allowedposttags = array(
- 'address' => array(),
- 'a' => array(
- 'class' => true,
- 'href' => true,
- 'id' => true,
- 'title' => true,
- 'rel' => true,
- 'rev' => true,
- 'name' => true,
- 'target' => true,
- ),
- 'abbr' => array(
- 'class' => true,
- 'title' => true,
- ),
- 'acronym' => array(
- 'title' => true,
- ),
- 'article' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'aside' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'b' => array(),
- 'big' => array(),
- 'blockquote' => array(
- 'id' => true,
- 'cite' => true,
- 'class' => true,
- 'lang' => true,
- 'xml:lang' => true,
- ),
- 'br' => array (
- 'class' => true,
- ),
- 'button' => array(
- 'disabled' => true,
- 'name' => true,
- 'type' => true,
- 'value' => true,
- ),
- 'caption' => array(
- 'align' => true,
- 'class' => true,
- ),
- 'cite' => array (
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'title' => true,
- ),
- 'code' => array (
- 'style' => true,
- ),
- 'col' => array(
- 'align' => true,
- 'char' => true,
- 'charoff' => true,
- 'span' => true,
- 'dir' => true,
- 'style' => true,
- 'valign' => true,
- 'width' => true,
- ),
- 'del' => array(
- 'datetime' => true,
- ),
- 'dd' => array(),
- 'details' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'open' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'div' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'dl' => array(),
- 'dt' => array(),
- 'em' => array(),
- 'fieldset' => array(),
- 'figure' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'figcaption' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'font' => array(
- 'color' => true,
- 'face' => true,
- 'size' => true,
- ),
- 'footer' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'form' => array(
- 'action' => true,
- 'accept' => true,
- 'accept-charset' => true,
- 'enctype' => true,
- 'method' => true,
- 'name' => true,
- 'target' => true,
- ),
- 'h1' => array(
- 'align' => true,
- 'class' => true,
- 'id' => true,
- 'style' => true,
- ),
- 'h2' => array (
- 'align' => true,
- 'class' => true,
- 'id' => true,
- 'style' => true,
- ),
- 'h3' => array (
- 'align' => true,
- 'class' => true,
- 'id' => true,
- 'style' => true,
- ),
- 'h4' => array (
- 'align' => true,
- 'class' => true,
- 'id' => true,
- 'style' => true,
- ),
- 'h5' => array (
- 'align' => true,
- 'class' => true,
- 'id' => true,
- 'style' => true,
- ),
- 'h6' => array (
- 'align' => true,
- 'class' => true,
- 'id' => true,
- 'style' => true,
- ),
- 'header' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'hgroup' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'hr' => array (
- 'align' => true,
- 'class' => true,
- 'noshade' => true,
- 'size' => true,
- 'width' => true,
- ),
- 'i' => array(),
- 'img' => array(
- 'alt' => true,
- 'align' => true,
- 'border' => true,
- 'class' => true,
- 'height' => true,
- 'hspace' => true,
- 'longdesc' => true,
- 'vspace' => true,
- 'src' => true,
- 'style' => true,
- 'width' => true,
- ),
- 'ins' => array(
- 'datetime' => true,
- 'cite' => true,
- ),
- 'kbd' => array(),
- 'label' => array(
- 'for' => true,
- ),
- 'legend' => array(
- 'align' => true,
- ),
- 'li' => array (
- 'align' => true,
- 'class' => true,
- ),
- 'menu' => array (
- 'class' => true,
- 'style' => true,
- 'type' => true,
- ),
- 'nav' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'p' => array(
- 'class' => true,
- 'align' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'pre' => array(
- 'style' => true,
- 'width' => true,
- ),
- 'q' => array(
- 'cite' => true,
- ),
- 's' => array(),
- 'span' => array (
- 'class' => true,
- 'dir' => true,
- 'align' => true,
- 'lang' => true,
- 'style' => true,
- 'title' => true,
- 'xml:lang' => true,
- ),
- 'section' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'strike' => array(),
- 'strong' => array(),
- 'sub' => array(),
- 'summary' => array(
- 'align' => true,
- 'class' => true,
- 'dir' => true,
- 'lang' => true,
- 'style' => true,
- 'xml:lang' => true,
- ),
- 'sup' => array(),
- 'table' => array(
- 'align' => true,
- 'bgcolor' => true,
- 'border' => true,
- 'cellpadding' => true,
- 'cellspacing' => true,
- 'class' => true,
- 'dir' => true,
- 'id' => true,
- 'rules' => true,
- 'style' => true,
- 'summary' => true,
- 'width' => true,
- ),
- 'tbody' => array(
- 'align' => true,
- 'char' => true,
- 'charoff' => true,
- 'valign' => true,
- ),
- 'td' => array(
- 'abbr' => true,
- 'align' => true,
- 'axis' => true,
- 'bgcolor' => true,
- 'char' => true,
- 'charoff' => true,
- 'class' => true,
- 'colspan' => true,
- 'dir' => true,
- 'headers' => true,
- 'height' => true,
- 'nowrap' => true,
- 'rowspan' => true,
- 'scope' => true,
- 'style' => true,
- 'valign' => true,
- 'width' => true,
- ),
- 'textarea' => array(
- 'cols' => true,
- 'rows' => true,
- 'disabled' => true,
- 'name' => true,
- 'readonly' => true,
- ),
- 'tfoot' => array(
- 'align' => true,
- 'char' => true,
- 'class' => true,
- 'charoff' => true,
- 'valign' => true,
- ),
- 'th' => array(
- 'abbr' => true,
- 'align' => true,
- 'axis' => true,
- 'bgcolor' => true,
- 'char' => true,
- 'charoff' => true,
- 'class' => true,
- 'colspan' => true,
- 'headers' => true,
- 'height' => true,
- 'nowrap' => true,
- 'rowspan' => true,
- 'scope' => true,
- 'valign' => true,
- 'width' => true,
- ),
- 'thead' => array(
- 'align' => true,
- 'char' => true,
- 'charoff' => true,
- 'class' => true,
- 'valign' => true,
- ),
- 'title' => array(),
- 'tr' => array(
- 'align' => true,
- 'bgcolor' => true,
- 'char' => true,
- 'charoff' => true,
- 'class' => true,
- 'style' => true,
- 'valign' => true,
- ),
- 'tt' => array(),
- 'u' => array(),
- 'ul' => array (
- 'class' => true,
- 'style' => true,
- 'type' => true,
- ),
- 'ol' => array (
- 'class' => true,
- 'start' => true,
- 'style' => true,
- 'type' => true,
- ),
- 'var' => array(),
- );
- /**
- * Kses allowed HTML elements.
- *
- * @global array $allowedtags
- * @since 1.0.0
- */
- $allowedtags = array(
- 'a' => array(
- 'href' => true,
- 'title' => true,
- ),
- 'abbr' => array(
- 'title' => true,
- ),
- 'acronym' => array(
- 'title' => true,
- ),
- 'b' => array(),
- 'blockquote' => array(
- 'cite' => true,
- ),
- // 'br' => array(),
- 'cite' => array(),
- 'code' => array(),
- 'del' => array(
- 'datetime' => true,
- ),
- // 'dd' => array(),
- // 'dl' => array(),
- // 'dt' => array(),
- 'em' => array (), 'i' => array (),
- // 'ins' => array('datetime' => array(), 'cite' => array()),
- // 'li' => array(),
- // 'ol' => array(),
- // 'p' => array(),
- 'q' => array(
- 'cite' => true,
- ),
- 'strike' => array(),
- 'strong' => array(),
- // 'sub' => array(),
- // 'sup' => array(),
- // 'u' => array(),
- // 'ul' => array(),
- );
- $allowedentitynames = array(
- 'nbsp', 'iexcl', 'cent', 'pound', 'curren', 'yen',
- 'brvbar', 'sect', 'uml', 'copy', 'ordf', 'laquo',
- 'not', 'shy', 'reg', 'macr', 'deg', 'plusmn',
- 'acute', 'micro', 'para', 'middot', 'cedil', 'ordm',
- 'raquo', 'iquest', 'Agrave', 'Aacute', 'Acirc', 'Atilde',
- 'Auml', 'Aring', 'AElig', 'Ccedil', 'Egrave', 'Eacute',
- 'Ecirc', 'Euml', 'Igrave', 'Iacute', 'Icirc', 'Iuml',
- 'ETH', 'Ntilde', 'Ograve', 'Oacute', 'Ocirc', 'Otilde',
- 'Ouml', 'times', 'Oslash', 'Ugrave', 'Uacute', 'Ucirc',
- 'Uuml', 'Yacute', 'THORN', 'szlig', 'agrave', 'aacute',
- 'acirc', 'atilde', 'auml', 'aring', 'aelig', 'ccedil',
- 'egrave', 'eacute', 'ecirc', 'euml', 'igrave', 'iacute',
- 'icirc', 'iuml', 'eth', 'ntilde', 'ograve', 'oacute',
- 'ocirc', 'otilde', 'ouml', 'divide', 'oslash', 'ugrave',
- 'uacute', 'ucirc', 'uuml', 'yacute', 'thorn', 'yuml',
- 'quot', 'amp', 'lt', 'gt', 'apos', 'OElig',
- 'oelig', 'Scaron', 'scaron', 'Yuml', 'circ', 'tilde',
- 'ensp', 'emsp', 'thinsp', 'zwnj', 'zwj', 'lrm',
- 'rlm', 'ndash', 'mdash', 'lsquo', 'rsquo', 'sbquo',
- 'ldquo', 'rdquo', 'bdquo', 'dagger', 'Dagger', 'permil',
- 'lsaquo', 'rsaquo', 'euro', 'fnof', 'Alpha', 'Beta',
- 'Gamma', 'Delta', 'Epsilon', 'Zeta', 'Eta', 'Theta',
- 'Iota', 'Kappa', 'Lambda', 'Mu', 'Nu', 'Xi',
- 'Omicron', 'Pi', 'Rho', 'Sigma', 'Tau', 'Upsilon',
- 'Phi', 'Chi', 'Psi', 'Omega', 'alpha', 'beta',
- 'gamma', 'delta', 'epsilon', 'zeta', 'eta', 'theta',
- 'iota', 'kappa', 'lambda', 'mu', 'nu', 'xi',
- 'omicron', 'pi', 'rho', 'sigmaf', 'sigma', 'tau',
- 'upsilon', 'phi', 'chi', 'psi', 'omega', 'thetasym',
- 'upsih', 'piv', 'bull', 'hellip', 'prime', 'Prime',
- 'oline', 'frasl', 'weierp', 'image', 'real', 'trade',
- 'alefsym', 'larr', 'uarr', 'rarr', 'darr', 'harr',
- 'crarr', 'lArr', 'uArr', 'rArr', 'dArr', 'hArr',
- 'forall', 'part', 'exist', 'empty', 'nabla', 'isin',
- 'notin', 'ni', 'prod', 'sum', 'minus', 'lowast',
- 'radic', 'prop', 'infin', 'ang', 'and', 'or',
- 'cap', 'cup', 'int', 'sim', 'cong', 'asymp',
- 'ne', 'equiv', 'le', 'ge', 'sub', 'sup',
- 'nsub', 'sube', 'supe', 'oplus', 'otimes', 'perp',
- 'sdot', 'lceil', 'rceil', 'lfloor', 'rfloor', 'lang',
- 'rang', 'loz', 'spades', 'clubs', 'hearts', 'diams',
- );
- }
- /**
- * Filters content and keeps only allowable HTML elements.
- *
- * This function makes sure that only the allowed HTML element names, attribute
- * names and attribute values plus only sane HTML entities will occur in
- * $string. You have to remove any slashes from PHP's magic quotes before you
- * call this function.
- *
- * The default allowed protocols are 'http', 'https', 'ftp', 'mailto', 'news',
- * 'irc', 'gopher', 'nntp', 'feed', 'telnet, 'mms', 'rtsp' and 'svn'. This
- * covers all common link protocols, except for 'javascript' which should not
- * be allowed for untrusted users.
- *
- * @since 1.0.0
- *
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Optional. Allowed protocol in links.
- * @return string Filtered content with only allowed HTML elements
- */
- function wp_kses($string, $allowed_html, $allowed_protocols = array ()) {
- if ( empty( $allowed_protocols ) )
- $allowed_protocols = wp_allowed_protocols();
- $string = wp_kses_no_null($string);
- $string = wp_kses_js_entities($string);
- $string = wp_kses_normalize_entities($string);
- $allowed_html_fixed = wp_kses_array_lc($allowed_html);
- $string = wp_kses_hook($string, $allowed_html_fixed, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
- return wp_kses_split($string, $allowed_html_fixed, $allowed_protocols);
- }
- /**
- * You add any kses hooks here.
- *
- * There is currently only one kses WordPress hook and it is called here. All
- * parameters are passed to the hooks and expected to receive a string.
- *
- * @since 1.0.0
- *
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Allowed protocol in links
- * @return string Filtered content through 'pre_kses' hook
- */
- function wp_kses_hook($string, $allowed_html, $allowed_protocols) {
- $string = apply_filters('pre_kses', $string, $allowed_html, $allowed_protocols);
- return $string;
- }
- /**
- * This function returns kses' version number.
- *
- * @since 1.0.0
- *
- * @return string KSES Version Number
- */
- function wp_kses_version() {
- return '0.2.2';
- }
- /**
- * Searches for HTML tags, no matter how malformed.
- *
- * It also matches stray ">" characters.
- *
- * @since 1.0.0
- *
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Content with fixed HTML tags
- */
- function wp_kses_split($string, $allowed_html, $allowed_protocols) {
- global $pass_allowed_html, $pass_allowed_protocols;
- $pass_allowed_html = $allowed_html;
- $pass_allowed_protocols = $allowed_protocols;
- return preg_replace_callback( '%(<!--.*?(-->|$))|(<[^>]*(>|$)|>)%', '_wp_kses_split_callback', $string );
- }
- /**
- * Callback for wp_kses_split.
- *
- * @since 3.1.0
- * @access private
- */
- function _wp_kses_split_callback( $match ) {
- global $pass_allowed_html, $pass_allowed_protocols;
- return wp_kses_split2( $match[0], $pass_allowed_html, $pass_allowed_protocols );
- }
- /**
- * Callback for wp_kses_split for fixing malformed HTML tags.
- *
- * This function does a lot of work. It rejects some very malformed things like
- * <:::>. It returns an empty string, if the element isn't allowed (look ma, no
- * strip_tags()!). Otherwise it splits the tag into an element and an attribute
- * list.
- *
- * After the tag is split into an element and an attribute list, it is run
- * through another filter which will remove illegal attributes and once that is
- * completed, will be returned.
- *
- * @access private
- * @since 1.0.0
- * @uses wp_kses_attr()
- *
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Fixed HTML element
- */
- function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
- $string = wp_kses_stripslashes($string);
- if (substr($string, 0, 1) != '<')
- return '>';
- # It matched a ">" character
- if ( '<!--' == substr( $string, 0, 4 ) ) {
- $string = str_replace( array('<!--', '-->'), '', $string );
- while ( $string != ($newstring = wp_kses($string, $allowed_html, $allowed_protocols)) )
- $string = $newstring;
- if ( $string == '' )
- return '';
- // prevent multiple dashes in comments
- $string = preg_replace('/--+/', '-', $string);
- // prevent three dashes closing a comment
- $string = preg_replace('/-$/', '', $string);
- return "<!--{$string}-->";
- }
- # Allow HTML comments
- if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
- return '';
- # It's seriously malformed
- $slash = trim($matches[1]);
- $elem = $matches[2];
- $attrlist = $matches[3];
- if ( ! isset($allowed_html[strtolower($elem)]) )
- return '';
- # They are using a not allowed HTML element
- if ($slash != '')
- return "</$elem>";
- # No attributes are allowed for closing elements
- return wp_kses_attr( $elem, $attrlist, $allowed_html, $allowed_protocols );
- }
- /**
- * Removes all attributes, if none are allowed for this element.
- *
- * If some are allowed it calls wp_kses_hair() to split them further, and then
- * it builds up new HTML code from the data that kses_hair() returns. It also
- * removes "<" and ">" characters, if there are any left. One more thing it does
- * is to check if the tag has a closing XHTML slash, and if it does, it puts one
- * in the returned code as well.
- *
- * @since 1.0.0
- *
- * @param string $element HTML element/tag
- * @param string $attr HTML attributes from HTML element to closing HTML element tag
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Sanitized HTML element
- */
- function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
- # Is there a closing XHTML slash at the end of the attributes?
- $xhtml_slash = '';
- if (preg_match('%\s*/\s*$%', $attr))
- $xhtml_slash = ' /';
- # Are any attributes allowed at all for this element?
- if ( ! isset($allowed_html[strtolower($element)]) || count($allowed_html[strtolower($element)]) == 0 )
- return "<$element$xhtml_slash>";
- # Split it
- $attrarr = wp_kses_hair($attr, $allowed_protocols);
- # Go through $attrarr, and save the allowed attributes for this element
- # in $attr2
- $attr2 = '';
- $allowed_attr = $allowed_html[strtolower($element)];
- foreach ($attrarr as $arreach) {
- if ( ! isset( $allowed_attr[strtolower($arreach['name'])] ) )
- continue; # the attribute is not allowed
- $current = $allowed_attr[strtolower($arreach['name'])];
- if ( $current == '' )
- continue; # the attribute is not allowed
- if ( strtolower( $arreach['name'] ) == 'style' ) {
- $orig_value = $arreach['value'];
- $value = safecss_filter_attr( $orig_value );
- if ( empty( $value ) )
- continue;
- $arreach['value'] = $value;
- $arreach['whole'] = str_replace( $orig_value, $value, $arreach['whole'] );
- }
- if ( ! is_array($current) ) {
- $attr2 .= ' '.$arreach['whole'];
- # there are no checks
- } else {
- # there are some checks
- $ok = true;
- foreach ($current as $currkey => $currval) {
- if ( ! wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval) ) {
- $ok = false;
- break;
- }
- }
- if ( $ok )
- $attr2 .= ' '.$arreach['whole']; # it passed them
- } # if !is_array($current)
- } # foreach
- # Remove any "<" or ">" characters
- $attr2 = preg_replace('/[<>]/', '', $attr2);
- return "<$element$attr2$xhtml_slash>";
- }
- /**
- * Builds an attribute list from string containing attributes.
- *
- * This function does a lot of work. It parses an attribute list into an array
- * with attribute data, and tries to do the right thing even if it gets weird
- * input. It will add quotes around attribute values that don't have any quotes
- * or apostrophes around them, to make it easier to produce HTML code that will
- * conform to W3C's HTML specification. It will also remove bad URL protocols
- * from attribute values. It also reduces duplicate attributes by using the
- * attribute defined first (foo='bar' foo='baz' will result in foo='bar').
- *
- * @since 1.0.0
- *
- * @param string $attr Attribute list from HTML element to closing HTML element tag
- * @param array $allowed_protocols Allowed protocols to keep
- * @return array List of attributes after parsing
- */
- function wp_kses_hair($attr, $allowed_protocols) {
- $attrarr = array ();
- $mode = 0;
- $attrname = '';
- $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
- # Loop through the whole attribute list
- while (strlen($attr) != 0) {
- $working = 0; # Was the last operation successful?
- switch ($mode) {
- case 0 : # attribute name, href for instance
- if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
- $attrname = $match[1];
- $working = $mode = 1;
- $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
- }
- break;
- case 1 : # equals sign or valueless ("selected")
- if (preg_match('/^\s*=\s*/', $attr)) # equals sign
- {
- $working = 1;
- $mode = 2;
- $attr = preg_replace('/^\s*=\s*/', '', $attr);
- break;
- }
- if (preg_match('/^\s+/', $attr)) # valueless
- {
- $working = 1;
- $mode = 0;
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
- }
- $attr = preg_replace('/^\s+/', '', $attr);
- }
- break;
- case 2 : # attribute value, a URL after href= for instance
- if (preg_match('%^"([^"]*)"(\s+|/?$)%', $attr, $match))
- # "value"
- {
- $thisval = $match[1];
- if ( in_array(strtolower($attrname), $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname="$thisval"", 'vless' => 'n');
- }
- $working = 1;
- $mode = 0;
- $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
- break;
- }
- if (preg_match("%^'([^']*)'(\s+|/?$)%", $attr, $match))
- # 'value'
- {
- $thisval = $match[1];
- if ( in_array(strtolower($attrname), $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname='$thisval'", 'vless' => 'n');
- }
- $working = 1;
- $mode = 0;
- $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
- break;
- }
- if (preg_match("%^([^\s"']+)(\s+|/?$)%", $attr, $match))
- # value
- {
- $thisval = $match[1];
- if ( in_array(strtolower($attrname), $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(false === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname="$thisval"", 'vless' => 'n');
- }
- # We add quotes to conform to W3C's HTML spec.
- $working = 1;
- $mode = 0;
- $attr = preg_replace("%^[^\s"']+(\s+|$)%", '', $attr);
- }
- break;
- } # switch
- if ($working == 0) # not well formed, remove and try again
- {
- $attr = wp_kses_html_error($attr);
- $mode = 0;
- }
- } # while
- if ($mode == 1 && false === array_key_exists($attrname, $attrarr))
- # special case, for when the attribute list ends with a valueless
- # attribute like "selected"
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
- return $attrarr;
- }
- /**
- * Performs different checks for attribute values.
- *
- * The currently implemented checks are "maxlen", "minlen", "maxval", "minval"
- * and "valueless".
- *
- * @since 1.0.0
- *
- * @param string $value Attribute value
- * @param string $vless Whether the value is valueless. Use 'y' or 'n'
- * @param string $checkname What $checkvalue is checking for.
- * @param mixed $checkvalue What constraint the value should pass
- * @return bool Whether check passes
- */
- function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
- $ok = true;
- switch (strtolower($checkname)) {
- case 'maxlen' :
- # The maxlen check makes sure that the attribute value has a length not
- # greater than the given value. This can be used to avoid Buffer Overflows
- # in WWW clients and various Internet servers.
- if (strlen($value) > $checkvalue)
- $ok = false;
- break;
- case 'minlen' :
- # The minlen check makes sure that the attribute value has a length not
- # smaller than the given value.
- if (strlen($value) < $checkvalue)
- $ok = false;
- break;
- case 'maxval' :
- # The maxval check does two things: it checks that the attribute value is
- # an integer from 0 and up, without an excessive amount of zeroes or
- # whitespace (to avoid Buffer Overflows). It also checks that the attribute
- # value is not greater than the given value.
- # This check can be used to avoid Denial of Service attacks.
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
- $ok = false;
- if ($value > $checkvalue)
- $ok = false;
- break;
- case 'minval' :
- # The minval check makes sure that the attribute value is a positive integer,
- # and that it is not smaller than the given value.
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
- $ok = false;
- if ($value < $checkvalue)
- $ok = false;
- break;
- case 'valueless' :
- # The valueless check makes sure if the attribute has a value
- # (like <a href="blah">) or not (<option selected>). If the given value
- # is a "y" or a "Y", the attribute must not have a value.
- # If the given value is an "n" or an "N", the attribute must have one.
- if (strtolower($checkvalue) != $vless)
- $ok = false;
- break;
- } # switch
- return $ok;
- }
- /**
- * Sanitize string from bad protocols.
- *
- * This function removes all non-allowed protocols from the beginning of
- * $string. It ignores whitespace and the case of the letters, and it does
- * understand HTML entities. It does its work in a while loop, so it won't be
- * fooled by a string like "javascript:javascript:alert(57)".
- *
- * @since 1.0.0
- *
- * @param string $string Content to filter bad protocols from
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Filtered content
- */
- function wp_kses_bad_protocol($string, $allowed_protocols) {
- $string = wp_kses_no_null($string);
- $iterations = 0;
- do {
- $original_string = $string;
- $string = wp_kses_bad_protocol_once($string, $allowed_protocols);
- } while ( $original_string != $string && ++$iterations < 6 );
- if ( $original_string != $string )
- return '';
- return $string;
- }
- /**
- * Removes any null characters in $string.
- *
- * @since 1.0.0
- *
- * @param string $string
- * @return string
- */
- function wp_kses_no_null($string) {
- $string = preg_replace('/\0+/', '', $string);
- $string = preg_replace('/(\\\\0)+/', '', $string);
- return $string;
- }
- /**
- * Strips slashes from in front of quotes.
- *
- * This function changes the character sequence " to just ". It leaves all
- * other slashes alone. It's really weird, but the quoting from
- * preg_replace(//e) seems to require this.
- *
- * @since 1.0.0
- *
- * @param string $string String to strip slashes
- * @return string Fixed string with quoted slashes
- */
- function wp_kses_stripslashes($string) {
- return preg_replace('%\\\"%', '"', $string);
- }
- /**
- * Goes through an array and changes the keys to all lower case.
- *
- * @since 1.0.0
- *
- * @param array $inarray Unfiltered array
- * @return array Fixed array with all lowercase keys
- */
- function wp_kses_array_lc($inarray) {
- $outarray = array ();
- foreach ( (array) $inarray as $inkey => $inval) {
- $outkey = strtolower($inkey);
- $outarray[$outkey] = array ();
- foreach ( (array) $inval as $inkey2 => $inval2) {
- $outkey2 = strtolower($inkey2);
- $outarray[$outkey][$outkey2] = $inval2;
- } # foreach $inval
- } # foreach $inarray
- return $outarray;
- }
- /**
- * Removes the HTML JavaScript entities found in early versions of Netscape 4.
- *
- * @since 1.0.0
- *
- * @param string $string
- * @return string
- */
- function wp_kses_js_entities($string) {
- return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
- }
- /**
- * Handles parsing errors in wp_kses_hair().
- *
- * The general plan is to remove everything to and including some whitespace,
- * but it deals with quotes and apostrophes as well.
- *
- * @since 1.0.0
- *
- * @param string $string
- * @return string
- */
- function wp_kses_html_error($string) {
- return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string);
- }
- /**
- * Sanitizes content from bad protocols and other characters.
- *
- * This function searches for URL protocols at the beginning of $string, while
- * handling whitespace and HTML entities.
- *
- * @since 1.0.0
- *
- * @param string $string Content to check for bad protocols
- * @param string $allowed_protocols Allowed protocols
- * @return string Sanitized content
- */
- function wp_kses_bad_protocol_once($string, $allowed_protocols, $count = 1 ) {
- $string2 = preg_split( '/:|�*58;|�*3a;/i', $string, 2 );
- if ( isset($string2[1]) && ! preg_match('%/\?%', $string2[0]) ) {
- $string = trim( $string2[1] );
- $protocol = wp_kses_bad_protocol_once2( $string2[0], $allowed_protocols );
- if ( 'feed:' == $protocol ) {
- if ( $count > 2 )
- return '';
- $string = wp_kses_bad_protocol_once( $string, $allowed_protocols, ++$count );
- if ( empty( $string ) )
- return $string;
- }
- $string = $protocol . $string;
- }
- return $string;
- }
- /**
- * Callback for wp_kses_bad_protocol_once() regular expression.
- *
- * This function processes URL protocols, checks to see if they're in the
- * whitelist or not, and returns different data depending on the answer.
- *
- * @access private
- * @since 1.0.0
- *
- * @param string $string URI scheme to check against the whitelist
- * @param string $allowed_protocols Allowed protocols
- * @return string Sanitized content
- */
- function wp_kses_bad_protocol_once2( $string, $allowed_protocols ) {
- $string2 = wp_kses_decode_entities($string);
- $string2 = preg_replace('/\s/', '', $string2);
- $string2 = wp_kses_no_null($string2);
- $string2 = strtolower($string2);
- $allowed = false;
- foreach ( (array) $allowed_protocols as $one_protocol )
- if ( strtolower($one_protocol) == $string2 ) {
- $allowed = true;
- break;
- }
- if ($allowed)
- return "$string2:";
- else
- return '';
- }
- /**
- * Converts and fixes HTML entities.
- *
- * This function normalizes HTML entities. It will convert "AT&T" to the correct
- * "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
- *
- * @since 1.0.0
- *
- * @param string $string Content to normalize entities
- * @return string Content with normalized entities
- */
- function wp_kses_normalize_entities($string) {
- # Disarm all entities by converting & to &
- $string = str_replace('&', '&', $string);
- # Change back the allowed entities in our entity whitelist
- $string = preg_replace_callback('/&([A-Za-z]{2,8});/', 'wp_kses_named_entities', $string);
- $string = preg_replace_callback('/&#(0*[0-9]{1,7});/', 'wp_kses_normalize_entities2', $string);
- $string = preg_replace_callback('/&#[Xx](0*[0-9A-Fa-f]{1,6});/', 'wp_kses_normalize_entities3', $string);
- return $string;
- }
- /**
- * Callback for wp_kses_normalize_entities() regular expression.
- *
- * This function only accepts valid named entity references, which are finite,
- * case-sensitive, and highly scrutinized by HTML and XML validators.
- *
- * @since 3.0.0
- *
- * @param array $matches preg_replace_callback() matches array
- * @return string Correctly encoded entity
- */
- function wp_kses_named_entities($matches) {
- global $allowedentitynames;
- if ( empty($matches[1]) )
- return '';
- $i = $matches[1];
- return ( ( ! in_array($i, $allowedentitynames) ) ? "&$i;" : "&$i;" );
- }
- /**
- * Callback for wp_kses_normalize_entities() regular expression.
- *
- * This function helps wp_kses_normalize_entities() to only accept 16-bit values
- * and nothing more for &#number; entities.
- *
- * @access private
- * @since 1.0.0
- *
- * @param array $matches preg_replace_callback() matches array
- * @return string Correctly encoded entity
- */
- function wp_kses_normalize_entities2($matches) {
- if ( empty($matches[1]) )
- return '';
- $i = $matches[1];
- if (valid_unicode($i)) {
- $i = str_pad(ltrim($i,'0'), 3, '0', STR_PAD_LEFT);
- $i = "&#$i;";
- } else {
- $i = "&#$i;";
- }
- return $i;
- }
- /**
- * Callback for wp_kses_normalize_entities() for regular expression.
- *
- * This function helps wp_kses_normalize_entities() to only accept valid Unicode
- * numeric entities in hex form.
- *
- * @access private
- *
- * @param array $matches preg_replace_callback() matches array
- * @return string Correctly encoded entity
- */
- function wp_kses_normalize_entities3($matches) {
- if ( empty($matches[1]) )
- return '';
- $hexchars = $matches[1];
- return ( ( ! valid_unicode(hexdec($hexchars)) ) ? "&#x$hexchars;" : '&#x'.ltrim($hexchars,'0').';' );
- }
- /**
- * Helper function to determine if a Unicode value is valid.
- *
- * @param int $i Unicode value
- * @return bool True if the value was a valid Unicode number
- */
- function valid_unicode($i) {
- return ( $i == 0x9 || $i == 0xa || $i == 0xd ||
- ($i >= 0x20 && $i <= 0xd7ff) ||
- ($i >= 0xe000 && $i <= 0xfffd) ||
- ($i >= 0x10000 && $i <= 0x10ffff) );
- }
- /**
- * Convert all entities to their character counterparts.
- *
- * This function decodes numeric HTML entities (A and A). It doesn't do
- * anything with other entities like ä, but we don't need them in the URL
- * protocol whitelisting system anyway.
- *
- * @since 1.0.0
- *
- * @param string $string Content to change entities
- * @return string Content after decoded entities
- */
- function wp_kses_decode_entities($string) {
- $string = preg_replace_callback('/&#([0-9]+);/', '_wp_kses_decode_entities_chr', $string);
- $string = preg_replace_callback('/&#[Xx]([0-9A-Fa-f]+);/', '_wp_kses_decode_entities_chr_hexdec', $string);
- return $string;
- }
- /**
- * Regex callback for wp_kses_decode_entities()
- *
- * @param array $match preg match
- * @return string
- */
- function _wp_kses_decode_entities_chr( $match ) {
- return chr( $match[1] );
- }
- /**
- * Regex callback for wp_kses_decode_entities()
- *
- * @param array $match preg match
- * @return string
- */
- function _wp_kses_decode_entities_chr_hexdec( $match ) {
- return chr( hexdec( $match[1] ) );
- }
- /**
- * Sanitize content with allowed HTML Kses rules.
- *
- * @since 1.0.0
- * @uses $allowedtags
- *
- * @param string $data Content to filter, expected to be escaped with slashes
- * @return string Filtered content
- */
- function wp_filter_kses($data) {
- global $allowedtags;
- return addslashes( wp_kses(stripslashes( $data ), $allowedtags) );
- }
- /**
- * Sanitize content with allowed HTML Kses rules.
- *
- * @since 2.9.0
- * @uses $allowedtags
- *
- * @param string $data Content to filter, expected to not be escaped
- * @return string Filtered content
- */
- function wp_kses_data($data) {
- global $allowedtags;
- return wp_kses( $data , $allowedtags );
- }
- /**
- * Sanitize content for allowed HTML tags for post content.
- *
- * Post content refers to the page contents of the 'post' type and not $_POST
- * data from forms.
- *
- * @since 2.0.0
- * @uses $allowedposttags
- *
- * @param string $data Post content to filter, expected to be escaped with slashes
- * @return string Filtered post content with allowed HTML tags and attributes intact.
- */
- function wp_filter_post_kses($data) {
- global $allowedposttags;
- return addslashes ( wp_kses(stripslashes( $data ), $allowedposttags) );
- }
- /**
- * Sanitize content for allowed HTML tags for post content.
- *
- * Post content refers to the page contents of the 'post' type and not $_POST
- * data from forms.
- *
- * @since 2.9.0
- * @uses $allowedposttags
- *
- * @param string $data Post content to filter
- * @return string Filtered post content with allowed HTML tags and attributes intact.
- */
- function wp_kses_post($data) {
- global $allowedposttags;
- return wp_kses( $data , $allowedposttags );
- }
- /**
- * Strips all of the HTML in the content.
- *
- * @since 2.1.0
- *
- * @param string $data Content to strip all HTML from
- * @return string Filtered content without any HTML
- */
- function wp_filter_nohtml_kses($data) {
- return addslashes ( wp_kses(stripslashes( $data ), array()) );
- }
- /**
- * Adds all Kses input form content filters.
- *
- * All hooks have default priority. The wp_filter_kses() function is added to
- * the 'pre_comment_content' and 'title_save_pre' hooks.
- *
- * The wp_filter_post_kses() function is added to the 'content_save_pre',
- * 'excerpt_save_pre', and 'content_filtered_save_pre' hooks.
- *
- * @since 2.0.0
- * @uses add_filter() See description for what functions are added to what hooks.
- */
- function kses_init_filters() {
- // Normal filtering
- add_filter('title_save_pre', 'wp_filter_kses');
- // Comment filtering
- if ( current_user_can( 'unfiltered_html' ) )
- add_filter( 'pre_comment_content', 'wp_filter_post_kses' );
- else
- add_filter( 'pre_comment_content', 'wp_filter_kses' );
- // Post filtering
- add_filter('content_save_pre', 'wp_filter_post_kses');
- add_filter('excerpt_save_pre', 'wp_filter_post_kses');
- add_filter('content_filtered_save_pre', 'wp_filter_post_kses');
- }
- /**
- * Removes all Kses input form content filters.
- *
- * A quick procedural method to removing all of the filters that kses uses for
- * content in WordPress Loop.
- *
- * Does not remove the kses_init() function from 'init' hook (priority is
- * default). Also does not remove kses_init() function from 'set_current_user'
- * hook (priority is also default).
- *
- * @since 2.0.6
- */
- function kses_remove_filters() {
- // Normal filtering
- remove_filter('title_save_pre', 'wp_filter_kses');
- // Comment filtering
- remove_filter( 'pre_comment_content', 'wp_filter_post_kses' );
- remove_filter( 'pre_comment_content', 'wp_filter_kses' );
- // Post filtering
- remove_filter('content_save_pre', 'wp_filter_post_kses');
- remove_filter('excerpt_save_pre', 'wp_filter_post_kses');
- remove_filter('content_filtered_save_pre', 'wp_filter_post_kses');
- }
- /**
- * Sets up most of the Kses filters for input form content.
- *
- * If you remove the kses_init() function from 'init' hook and
- * 'set_current_user' (priority is default), then none of the Kses filter hooks
- * will be added.
- *
- * First removes all of the Kses filters in case the current user does not need
- * to have Kses filter the content. If the user does not have unfiltered_html
- * capability, then Kses filters are added.
- *
- * @uses kses_remove_filters() Removes the Kses filters
- * @uses kses_init_filters() Adds the Kses filters back if the user
- * does not have unfiltered HTML capability.
- * @since 2.0.0
- */
- function kses_init() {
- kses_remove_filters();
- if (current_user_can('unfiltered_html') == false)
- kses_init_filters();
- }
- add_action('init', 'kses_init');
- add_action('set_current_user', 'kses_init');
- /**
- * Inline CSS filter
- *
- * @since 2.8.1
- */
- function safecss_filter_attr( $css, $deprecated = '' ) {
- if ( !empty( $deprecated ) )
- _deprecated_argument( __FUNCTION__, '2.8.1' ); // Never implemented
- $css = wp_kses_no_null($css);
- $css = str_replace(array("\n","\r","\t"), '', $css);
- if ( preg_match( '%[\\(&=}]|/\*%', $css ) ) // remove any inline css containing \ ( & } = or comments
- return '';
- $css_array = explode( ';', trim( $css ) );
- $allowed_attr = apply_filters( 'safe_style_css', array( 'text-align', 'margin', 'color', 'float',
- 'border', 'background', 'background-color', 'border-bottom', 'border-bottom-color',
- 'border-bottom-style', 'border-bottom-width', 'border-collapse', 'border-color', 'border-left',
- 'border-left-color', 'border-left-style', 'border-left-width', 'border-right', 'border-right-color',
- 'border-right-style', 'border-right-width', 'border-spacing', 'border-style', 'border-top',
- 'border-top-color', 'border-top-style', 'border-top-width', 'border-width', 'caption-side',
- 'clear', 'cursor', 'direction', 'font', 'font-family', 'font-size', 'font-style',
- 'font-variant', 'font-weight', 'height', 'letter-spacing', 'line-height', 'margin-bottom',
- 'margin-left', 'margin-right', 'margin-top', 'overflow', 'padding', 'padding-bottom',
- 'padding-left', 'padding-right', 'padding-top', 'text-decoration', 'text-indent', 'vertical-align',
- 'width' ) );
- if ( empty($allowed_attr) )
- return $css;
- $css = '';
- foreach ( $css_array as $css_item ) {
- if ( $css_item == '' )
- continue;
- $css_item = trim( $css_item );
- $found = false;
- if ( strpos( $css_item, ':' ) === false ) {
- $found = true;
- } else {
- $parts = explode( ':', $css_item );
- if ( in_array( trim( $parts[0] ), $allowed_attr ) )
- $found = true;
- }
- if ( $found ) {
- if( $css != '' )
- $css .= ';';
- $css .= $css_item;
- }
- }
- return $css;
- }
复制代码 |
|