<?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(),
+ );
-// Added wp_ prefix to avoid conflicts with existing kses users
-# kses 0.2.2 - HTML/XHTML filter that only allows some elements and attributes
-# Copyright (C) 2002, 2003, 2005 Ulf Harnhammar
-# *** CONTACT INFORMATION ***
-#
-# E-mail: metaur at users dot sourceforge dot net
-# Web page: http://sourceforge.net/projects/kses
-# Paper mail: Ulf Harnhammar
-# Ymergatan 17 C
-# 753 25 Uppsala
-# SWEDEN
-#
-# [kses strips evil scripts!]
-if (!defined('CUSTOM_TAGS'))
- define('CUSTOM_TAGS', false);
-
-// You can override this in your my-hacks.php file
-if (!CUSTOM_TAGS) {
- $allowedposttags = array ('address' => array (), 'a' => array ('href' => array (), 'title' => array (), 'rel' => array (), 'rev' => array (), 'name' => array ()), 'abbr' => array ('title' => array ()), 'acronym' => array ('title' => array ()), 'b' => array (), 'big' => array (), 'blockquote' => array ('cite' => array ()), 'br' => array (), 'button' => array ('disabled' => array (), 'name' => array (), 'type' => array (), 'value' => array ()), 'caption' => array ('align' => array ()), 'code' => array (), 'col' => array ('align' => array (), 'char' => array (), 'charoff' => array (), 'span' => array (), 'valign' => array (), 'width' => array ()), 'del' => array ('datetime' => array ()), 'dd' => array (), 'div' => array ('align' => array ()), 'dl' => array (), 'dt' => array (), 'em' => array (), 'fieldset' => array (), 'font' => array ('color' => array (), 'face' => array (), 'size' => array ()), 'form' => array ('action' => array (), 'accept' => array (), 'accept-charset' => array (), 'enctype' => array (), 'method' => array (), 'name' => array (), 'target' => array ()), 'h1' => array ('align' => array ()), 'h2' => array ('align' => array ()), 'h3' => array ('align' => array ()), 'h4' => array ('align' => array ()), 'h5' => array ('align' => array ()), 'h6' => array ('align' => array ()), 'hr' => array ('align' => array (), 'noshade' => array (), 'size' => array (), 'width' => array ()), 'i' => array (), 'img' => array ('alt' => array (), 'align' => array (), 'border' => array (), 'height' => array (), 'hspace' => array (), 'longdesc' => array (), 'vspace' => array (), 'src' => array (), 'width' => array ()), 'ins' => array ('datetime' => array (), 'cite' => array ()), 'kbd' => array (), 'label' => array ('for' => array ()), 'legend' => array ('align' => array ()), 'li' => array (), 'p' => array ('align' => array ()), 'pre' => array ('width' => array ()), 'q' => array ('cite' => array ()), 's' => array (), 'strike' => array (), 'strong' => array (), 'sub' => array (), 'sup' => array (), 'table' => array ('align' => array (), 'bgcolor' => array (), 'border' => array (), 'cellpadding' => array (), 'cellspacing' => array (), 'rules' => array (), 'summary' => array (), 'width' => array ()), 'tbody' => array ('align' => array (), 'char' => array (), 'charoff' => array (), 'valign' => array ()), 'td' => array ('abbr' => array (), 'align' => array (), 'axis' => array (), 'bgcolor' => array (), 'char' => array (), 'charoff' => array (), 'colspan' => array (), 'headers' => array (), 'height' => array (), 'nowrap' => array (), 'rowspan' => array (), 'scope' => array (), 'valign' => array (), 'width' => array ()), 'textarea' => array ('cols' => array (), 'rows' => array (), 'disabled' => array (), 'name' => array (), 'readonly' => array ()), 'tfoot' => array ('align' => array (), 'char' => array (), 'charoff' => array (), 'valign' => array ()), 'th' => array ('abbr' => array (), 'align' => array (), 'axis' => array (), 'bgcolor' => array (), 'char' => array (), 'charoff' => array (), 'colspan' => array (), 'headers' => array (), 'height' => array (), 'nowrap' => array (), 'rowspan' => array (), 'scope' => array (), 'valign' => array (), 'width' => array ()), 'thead' => array ('align' => array (), 'char' => array (), 'charoff' => array (), 'valign' => array ()), 'title' => array (), 'tr' => array ('align' => array (), 'bgcolor' => array (), 'char' => array (), 'charoff' => array (), 'valign' => array ()), 'tt' => array (), 'u' => array (), 'ul' => array (), 'ol' => array (), 'var' => array () );
- $allowedtags = array ('a' => array ('href' => array (), 'title' => array ()), 'abbr' => array ('title' => array ()), 'acronym' => array ('title' => array ()), 'b' => array (), 'blockquote' => array ('cite' => 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(),
- 'code' => array (),
- // 'del' => array('datetime' => array()),
+ 'cite' => array(),
+ 'code' => array(),
+ 'del' => array(
+ 'datetime' => true,
+ ),
// 'dd' => array(),
// 'dl' => array(),
// 'dt' => array(),
- 'em' => array (), 'i' => array (),
+ 'em' => array (), 'i' => array (),
// 'ins' => array('datetime' => array(), 'cite' => array()),
// 'li' => array(),
// 'ol' => array(),
// 'p' => array(),
- // 'q' => array(),
- 'strike' => array (), 'strong' => 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',
+ );
}
-function wp_kses($string, $allowed_html, $allowed_protocols = array ('http', 'https', 'ftp', 'news', 'nntp', 'telnet', 'feed', 'gopher', 'mailto'))
- ###############################################################################
- # 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.
- ###############################################################################
- {
+
+/**
+ * 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);
- $string = wp_kses_hook($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, $allowed_protocols);
-} # function wp_kses
+}
-function wp_kses_hook($string)
-###############################################################################
-# You add any kses hooks here.
-###############################################################################
-{
+/**
+ * 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 $string;
-} # function wp_kses_hook
+}
-function wp_kses_version()
-###############################################################################
-# This function returns kses' version number.
-###############################################################################
-{
+/**
+ * This function returns kses' version number.
+ *
+ * @since 1.0.0
+ *
+ * @return string KSES Version Number
+ */
+function wp_kses_version() {
return '0.2.2';
-} # function wp_kses_version
-
-function wp_kses_split($string, $allowed_html, $allowed_protocols)
-###############################################################################
-# This function searches for HTML tags, no matter how malformed. It also
-# matches stray ">" characters.
-###############################################################################
-{
- return preg_replace('%((<!--.*?(-->|$))|(<[^>]*(>|$)|>))%e',
- "wp_kses_split2('\\1', \$allowed_html, ".'$allowed_protocols)', $string);
-} # function wp_kses_split
-
-function wp_kses_split2($string, $allowed_html, $allowed_protocols)
-###############################################################################
-# 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.
-###############################################################################
-{
+}
+
+/**
+ * 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($string, 0, 1) != '<')
return '>';
# It matched a ">" character
- if (preg_match('%^<!--(.*?)(-->)?$%', $string, $matches)) {
- $string = str_replace(array('<!--', '-->'), '', $matches[1]);
- while ( $string != $newstring = wp_kses($string, $allowed_html, $allowed_protocols) )
+ 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
$elem = $matches[2];
$attrlist = $matches[3];
- if (!@isset($allowed_html[strtolower($elem)]))
+ if ( ! isset($allowed_html[strtolower($elem)]) )
return '';
# They are using a not allowed HTML element
if ($slash != '')
- return "<$slash$elem>";
+ return "</$elem>";
# No attributes are allowed for closing elements
- return wp_kses_attr("$slash$elem", $attrlist, $allowed_html, $allowed_protocols);
-} # function wp_kses_split2
-
-function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols)
-###############################################################################
-# This function 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.
-###############################################################################
-{
+ 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?
$xhtml_slash = '';
- if (preg_match('%\s/\s*$%', $attr))
+ if (preg_match('%\s*/\s*$%', $attr))
$xhtml_slash = ' /';
# Are any attributes allowed at all for this element?
-
- if (@ count($allowed_html[strtolower($element)]) == 0)
+ if ( ! isset($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_html[strtolower($element)][strtolower($arreach['name'])]))
+ if ( ! isset( $allowed_attr[strtolower($arreach['name'])] ) )
continue; # the attribute is not allowed
- $current = $allowed_html[strtolower($element)][strtolower($arreach['name'])];
- if ($current == '')
+ $current = $allowed_attr[strtolower($arreach['name'])];
+ if ( $current == '' )
continue; # the attribute is not allowed
- if (!is_array($current))
+ 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 {
+ } else {
# there are some checks
$ok = true;
- foreach ($current as $currkey => $currval)
- if (!wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval)) {
+ foreach ($current as $currkey => $currval) {
+ if ( ! wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval) ) {
$ok = false;
break;
}
+ }
- if ($ok)
+ 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>";
-} # function wp_kses_attr
-
-function wp_kses_hair($attr, $allowed_protocols)
-###############################################################################
-# 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.
-###############################################################################
-{
+}
+
+/**
+ * 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
{
$working = 1;
$mode = 0;
- $attrarr[] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+ if(false === array_key_exists($attrname, $attrarr)) {
+ $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+ }
$attr = preg_replace('/^\s+/', '', $attr);
}
case 2 : # attribute value, a URL after href= for instance
- if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match))
+ if (preg_match('%^"([^"]*)"(\s+|/?$)%', $attr, $match))
# "value"
{
- $thisval = wp_kses_bad_protocol($match[1], $allowed_protocols);
+ $thisval = $match[1];
+ if ( in_array(strtolower($attrname), $uris) )
+ $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- $attrarr[] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
+ if(false === array_key_exists($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, $match))
+ if (preg_match("%^'([^']*)'(\s+|/?$)%", $attr, $match))
# 'value'
{
- $thisval = wp_kses_bad_protocol($match[1], $allowed_protocols);
+ $thisval = $match[1];
+ if ( in_array(strtolower($attrname), $uris) )
+ $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- $attrarr[] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname='$thisval'", 'vless' => 'n');
+ if(false === array_key_exists($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, $match))
+ if (preg_match("%^([^\s\"']+)(\s+|/?$)%", $attr, $match))
# value
{
- $thisval = wp_kses_bad_protocol($match[1], $allowed_protocols);
+ $thisval = $match[1];
+ if ( in_array(strtolower($attrname), $uris) )
+ $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- $attrarr[] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
+ if(false === array_key_exists($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;
$mode = 0;
} # switch
if ($working == 0) # not well formed, remove and try again
- {
+ {
$attr = wp_kses_html_error($attr);
$mode = 0;
}
} # while
- if ($mode == 1)
+ if ($mode == 1 && false === array_key_exists($attrname, $attrarr))
# special case, for when the attribute list ends with a valueless
# attribute like "selected"
- $attrarr[] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+ $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
return $attrarr;
-} # function wp_kses_hair
-
-function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue)
-###############################################################################
-# This function performs different checks for attribute values. The currently
-# implemented checks are "maxlen", "minlen", "maxval", "minval" and "valueless"
-# with even more checks to come soon.
-###############################################################################
-{
+}
+
+/**
+ * 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)) {
break;
case 'minval' :
- # The minval check checks that the attribute value is a positive integer,
+ # 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))
break;
case 'valueless' :
- # The valueless check checks if the attribute has a value
+ # 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.
} # switch
return $ok;
-} # function wp_kses_check_attr_val
-
-function wp_kses_bad_protocol($string, $allowed_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)".
-###############################################################################
-{
+}
+
+/**
+ * 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);
- $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
- $string2 = $string.'a';
+ $iterations = 0;
- while ($string != $string2) {
- $string2 = $string;
+ do {
+ $original_string = $string;
$string = wp_kses_bad_protocol_once($string, $allowed_protocols);
- } # while
+ } while ( $original_string != $string && ++$iterations < 6 );
+
+ if ( $original_string != $string )
+ return '';
return $string;
-} # function wp_kses_bad_protocol
+}
-function wp_kses_no_null($string)
-###############################################################################
-# This function removes any NULL characters in $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 $string;
-} # function wp_kses_no_null
-
-function wp_kses_stripslashes($string)
-###############################################################################
-# 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.
-###############################################################################
-{
+}
+
+/**
+ * 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('%\\\\"%', '"', $string);
-} # function wp_kses_stripslashes
+}
-function wp_kses_array_lc($inarray)
-###############################################################################
-# This function goes through an array, and changes the keys to all lower case.
-###############################################################################
-{
+/**
+ * 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) {
$outarray = array ();
- foreach ($inarray as $inkey => $inval) {
+ foreach ( (array) $inarray as $inkey => $inval) {
$outkey = strtolower($inkey);
$outarray[$outkey] = array ();
- foreach ($inval as $inkey2 => $inval2) {
+ foreach ( (array) $inval as $inkey2 => $inval2) {
$outkey2 = strtolower($inkey2);
$outarray[$outkey][$outkey2] = $inval2;
} # foreach $inval
} # foreach $inarray
return $outarray;
-} # function wp_kses_array_lc
-
-function wp_kses_js_entities($string)
-###############################################################################
-# This function removes the HTML JavaScript entities found in early versions of
-# Netscape 4.
-###############################################################################
-{
+}
+
+/**
+ * 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*;?|$)%', '', $string);
-} # function wp_kses_js_entities
-
-function wp_kses_html_error($string)
-###############################################################################
-# This function deals with 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.
-###############################################################################
-{
+}
+
+/**
+ * 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*/', '', $string);
-} # function wp_kses_html_error
-
-function wp_kses_bad_protocol_once($string, $allowed_protocols)
-###############################################################################
-# This function searches for URL protocols at the beginning of $string, while
-# handling whitespace and HTML entities.
-###############################################################################
-{
- return preg_replace('/^((&[^;]*;|[\sA-Za-z0-9])*)'.'(:|:|&#[Xx]3[Aa];)\s*/e', 'wp_kses_bad_protocol_once2("\\1", $allowed_protocols)', $string);
-} # function wp_kses_bad_protocol_once
-
-function wp_kses_bad_protocol_once2($string, $allowed_protocols)
-###############################################################################
-# This function processes URL protocols, checks to see if they're in the white-
-# list or not, and returns different data depending on the answer.
-###############################################################################
-{
+}
+
+/**
+ * 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 = preg_replace('/\xad+/', '', $string2);
- # deals with Opera "feature"
$string2 = strtolower($string2);
$allowed = false;
- foreach ($allowed_protocols as $one_protocol)
- if (strtolower($one_protocol) == $string2) {
+ foreach ( (array) $allowed_protocols as $one_protocol )
+ if ( strtolower($one_protocol) == $string2 ) {
$allowed = true;
break;
}
return "$string2:";
else
return '';
-} # function wp_kses_bad_protocol_once2
-
-function wp_kses_normalize_entities($string)
-###############################################################################
-# This function normalizes HTML entities. It will convert "AT&T" to the correct
-# "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
-###############################################################################
-{
+}
+
+/**
+ * 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('/&([A-Za-z][A-Za-z0-9]{0,19});/', '&\\1;', $string);
- $string = preg_replace('/&#0*([0-9]{1,5});/e', 'wp_kses_normalize_entities2("\\1")', $string);
- $string = preg_replace('/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', '&#\\1\\2;', $string);
+ $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 $string;
-} # function wp_kses_normalize_entities
-
-function wp_kses_normalize_entities2($i)
-###############################################################################
-# This function helps wp_kses_normalize_entities() to only accept 16 bit values
-# and nothing more for &#number; entities.
-###############################################################################
-{
- return (($i > 65535) ? "&#$i;" : "&#$i;");
-} # function wp_kses_normalize_entities2
-
-function wp_kses_decode_entities($string)
-###############################################################################
-# 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.
-###############################################################################
-{
- $string = preg_replace('/&#([0-9]+);/e', 'chr("\\1")', $string);
- $string = preg_replace('/&#[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', $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;
-} # function wp_kses_decode_entities
+}
+/**
+ * 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 $allowedtags;
- return wp_kses($data, $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() {
- add_filter('pre_comment_author', 'wp_filter_kses');
- add_filter('pre_comment_content', 'wp_filter_kses');
- add_filter('content_save_pre', 'wp_filter_post_kses');
- add_filter('title_save_pre', 'wp_filter_kses');
+ // 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');
}
-function kses_init() {
- remove_filter('pre_comment_author', 'wp_filter_kses');
- remove_filter('pre_comment_content', 'wp_filter_kses');
- remove_filter('content_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;
+}
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff