<?php
-
-// 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) {
+/**
+ * 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.
+ *
+ * The {@see 'wp_kses_allowed_html'} filter is more powerful and supplies context.
+ *
+ * `CUSTOM_TAGS` is not recommended and should be considered deprecated.
+ *
+ * @see wp_kses_allowed_html()
+ *
+ * @since 1.2.0
+ */
+if ( ! defined( 'CUSTOM_TAGS' ) )
+ define( 'CUSTOM_TAGS', false );
+
+// Ensure that these variables are added to the global namespace
+// (e.g. if using namespaces / autoload in the current PHP environment).
+global $allowedposttags, $allowedtags, $allowedentitynames;
+
+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(
- 'href' => array(), 'title' => array(),
- 'rel' => array(), 'rev' => array(),
- 'name' => array()
- ),
- 'abbr' => array(
- 'title' => array(), 'class' => array()
- ),
- 'acronym' => array(
- 'title' => array()
- ),
+ 'href' => true,
+ 'rel' => true,
+ 'rev' => true,
+ 'name' => true,
+ 'target' => true,
+ ),
+ 'abbr' => array(),
+ 'acronym' => array(),
+ 'area' => array(
+ 'alt' => true,
+ 'coords' => true,
+ 'href' => true,
+ 'nohref' => true,
+ 'shape' => true,
+ 'target' => true,
+ ),
+ 'article' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'aside' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'audio' => array(
+ 'autoplay' => true,
+ 'controls' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'preload' => true,
+ 'src' => true,
+ ),
'b' => array(),
+ 'bdo' => array(
+ 'dir' => true,
+ ),
'big' => array(),
'blockquote' => array(
- 'cite' => array(), 'xml:lang' => array(),
- 'lang' => array()
- ),
+ 'cite' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'br' => array(),
'button' => array(
- 'disabled' => array(), 'name' => array(),
- 'type' => array(), 'value' => array()
- ),
+ 'disabled' => true,
+ 'name' => true,
+ 'type' => true,
+ 'value' => true,
+ ),
'caption' => array(
- 'align' => array()
- ),
+ 'align' => true,
+ ),
+ 'cite' => array(
+ 'dir' => true,
+ 'lang' => true,
+ ),
'code' => array(),
'col' => array(
- 'align' => array(), 'char' => array(),
- 'charoff' => array(), 'span' => array(),
- 'valign' => array(), 'width' => array()
- ),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'span' => true,
+ 'dir' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
+ 'colgroup' => array(
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'span' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'del' => array(
- 'datetime' => array()
- ),
+ 'datetime' => true,
+ ),
'dd' => array(),
+ 'dfn' => array(),
+ 'details' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'open' => true,
+ 'xml:lang' => true,
+ ),
'div' => array(
- 'align' => array(), 'xml:lang' => array(),
- 'lang' => array()
- ),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'dl' => array(),
'dt' => array(),
'em' => array(),
'fieldset' => array(),
+ 'figure' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'figcaption' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'font' => array(
- 'color' => array(), 'face' => array(),
- 'size' => array()
- ),
+ 'color' => true,
+ 'face' => true,
+ 'size' => true,
+ ),
+ 'footer' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'form' => array(
- 'action' => array(), 'accept' => array(),
- 'accept-charset' => array(), 'enctype' => array(),
- 'method' => array(), 'name' => array(),
- 'target' => array()
- ),
+ 'action' => true,
+ 'accept' => true,
+ 'accept-charset' => true,
+ 'enctype' => true,
+ 'method' => true,
+ 'name' => true,
+ 'target' => true,
+ ),
'h1' => array(
- 'align' => array()
- ),
+ 'align' => true,
+ ),
'h2' => array(
- 'align' => array()
- ),
+ 'align' => true,
+ ),
'h3' => array(
- 'align' => array()
- ),
+ 'align' => true,
+ ),
'h4' => array(
- 'align' => array()
- ),
+ 'align' => true,
+ ),
'h5' => array(
- 'align' => array()
- ),
+ 'align' => true,
+ ),
'h6' => array(
- 'align' => array()
- ),
+ 'align' => true,
+ ),
+ 'header' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'hgroup' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'hr' => array(
- 'align' => array(), 'noshade' => array(),
- 'size' => array(), 'width' => array()
- ),
+ 'align' => true,
+ 'noshade' => true,
+ 'size' => true,
+ 'width' => true,
+ ),
'i' => array(),
'img' => array(
- 'alt' => array(), 'align' => array(),
- 'border' => array(), 'height' => array(),
- 'hspace' => array(), 'longdesc' => array(),
- 'vspace' => array(), 'src' => array(),
- 'width' => array()
- ),
+ 'alt' => true,
+ 'align' => true,
+ 'border' => true,
+ 'height' => true,
+ 'hspace' => true,
+ 'longdesc' => true,
+ 'vspace' => true,
+ 'src' => true,
+ 'usemap' => true,
+ 'width' => true,
+ ),
'ins' => array(
- 'datetime' => array(), 'cite' => array()
- ),
+ 'datetime' => true,
+ 'cite' => true,
+ ),
'kbd' => array(),
'label' => array(
- 'for' => array()
- ),
+ 'for' => true,
+ ),
'legend' => array(
- 'align' => array()
- ),
- 'li' => array(),
+ 'align' => true,
+ ),
+ 'li' => array(
+ 'align' => true,
+ 'value' => true,
+ ),
+ 'map' => array(
+ 'name' => true,
+ ),
+ 'mark' => array(),
+ 'menu' => array(
+ 'type' => true,
+ ),
+ 'nav' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'p' => array(
- 'align' => array(), 'xml:lang' => array(),
- 'lang' => array()
- ),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'pre' => array(
- 'width' => array()
- ),
+ 'width' => true,
+ ),
'q' => array(
- 'cite' => array()
- ),
+ 'cite' => true,
+ ),
's' => array(),
+ 'samp' => array(),
+ 'span' => array(
+ 'dir' => true,
+ 'align' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'section' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'small' => array(),
'strike' => array(),
'strong' => array(),
'sub' => array(),
+ 'summary' => array(
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'sup' => array(),
'table' => array(
- 'align' => array(), 'bgcolor' => array(),
- 'border' => array(), 'cellpadding' => array(),
- 'cellspacing' => array(), 'rules' => array(),
- 'summary' => array(), 'width' => array()
- ),
+ 'align' => true,
+ 'bgcolor' => true,
+ 'border' => true,
+ 'cellpadding' => true,
+ 'cellspacing' => true,
+ 'dir' => true,
+ 'rules' => true,
+ 'summary' => true,
+ 'width' => true,
+ ),
'tbody' => array(
- 'align' => array(), 'char' => array(),
- 'charoff' => array(), 'valign' => array()
- ),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'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()
- ),
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'colspan' => true,
+ 'dir' => true,
+ 'headers' => true,
+ 'height' => true,
+ 'nowrap' => true,
+ 'rowspan' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'textarea' => array(
- 'cols' => array(), 'rows' => array(),
- 'disabled' => array(), 'name' => array(),
- 'readonly' => array()
- ),
+ 'cols' => true,
+ 'rows' => true,
+ 'disabled' => true,
+ 'name' => true,
+ 'readonly' => true,
+ ),
'tfoot' => array(
- 'align' => array(), 'char' => array(),
- 'charoff' => array(), 'valign' => array()
- ),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'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()
- ),
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'colspan' => true,
+ 'headers' => true,
+ 'height' => true,
+ 'nowrap' => true,
+ 'rowspan' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'thead' => array(
- 'align' => array(), 'char' => array(),
- 'charoff' => array(), 'valign' => array()
- ),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'title' => array(),
'tr' => array(
- 'align' => array(), 'bgcolor' => array(),
- 'char' => array(), 'charoff' => array(),
- 'valign' => array()
- ),
+ 'align' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
+ 'track' => array(
+ 'default' => true,
+ 'kind' => true,
+ 'label' => true,
+ 'src' => true,
+ 'srclang' => true,
+ ),
'tt' => array(),
'u' => array(),
- 'ul' => array(),
- 'ol' => array(),
- 'var' => array()
+ 'ul' => array(
+ 'type' => true,
+ ),
+ 'ol' => array(
+ 'start' => true,
+ 'type' => true,
+ 'reversed' => true,
+ ),
+ 'var' => array(),
+ 'video' => array(
+ 'autoplay' => true,
+ 'controls' => true,
+ 'height' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'poster' => true,
+ 'preload' => true,
+ 'src' => true,
+ 'width' => true,
+ ),
);
+ /**
+ * Kses allowed HTML elements.
+ *
+ * @global array $allowedtags
+ * @since 1.0.0
+ */
$allowedtags = array(
'a' => array(
- 'href' => array(), 'title' => array()
- ),
+ 'href' => true,
+ 'title' => true,
+ ),
'abbr' => array(
- 'title' => array()
- ),
+ 'title' => true,
+ ),
'acronym' => array(
- 'title' => array()
- ),
+ 'title' => true,
+ ),
'b' => array(),
'blockquote' => array(
- 'cite' => array()
- ),
- // 'br' => array(),
+ 'cite' => true,
+ ),
+ 'cite' => array(),
'code' => array(),
- // 'del' => array('datetime' => array()),
- // 'dd' => array(),
- // 'dl' => array(),
- // 'dt' => array(),
+ 'del' => array(
+ 'datetime' => true,
+ ),
'em' => array(),
'i' => array(),
- // 'ins' => array('datetime' => array(), 'cite' => array()),
- // 'li' => array(),
- // 'ol' => array(),
- // 'p' => array(),
- // 'q' => array(),
+ 'q' => array(
+ 'cite' => true,
+ ),
+ 's' => array(),
'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',
+ 'sup1', 'sup2', 'sup3', 'frac14', 'frac12', 'frac34',
+ 'there4',
+ );
+
+ $allowedposttags = array_map( '_wp_add_global_attributes', $allowedposttags );
+} else {
+ $allowedtags = wp_kses_array_lc( $allowedtags );
+ $allowedposttags = wp_kses_array_lc( $allowedposttags );
}
-function wp_kses($string, $allowed_html, $allowed_protocols = array ('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet'))
- ###############################################################################
- # 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.
- ###############################################################################
- {
- $string = wp_kses_no_null($string);
- $string = wp_kses_js_entities($string);
+/**
+ * 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, array( 'slash_zero' => 'keep' ) );
$string = wp_kses_normalize_entities($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, $allowed_protocols);
-} # function wp_kses
-
-function wp_kses_hook($string, $allowed_html, $allowed_protocols)
-###############################################################################
-# You add any kses hooks here.
-###############################################################################
-{
- $string = apply_filters('pre_kses', $string, $allowed_html, $allowed_protocols);
- return $string;
-} # function wp_kses_hook
+ $string = wp_kses_hook($string, $allowed_html, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
+ return wp_kses_split($string, $allowed_html, $allowed_protocols);
+}
+
+/**
+ * Filters one attribute only and ensures its value is allowed.
+ *
+ * This function has the advantage of being more secure than esc_attr() and can
+ * escape data in some situations where wp_kses() must strip the whole attribute.
+ *
+ * @since 4.2.3
+ *
+ * @param string $string The 'whole' attribute, including name and value.
+ * @param string $element The element name to which the attribute belongs.
+ * @return string Filtered attribute.
+ */
+function wp_kses_one_attr( $string, $element ) {
+ $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
+ $allowed_html = wp_kses_allowed_html( 'post' );
+ $allowed_protocols = wp_allowed_protocols();
+ $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
+
+ // Preserve leading and trailing whitespace.
+ $matches = array();
+ preg_match('/^\s*/', $string, $matches);
+ $lead = $matches[0];
+ preg_match('/\s*$/', $string, $matches);
+ $trail = $matches[0];
+ if ( empty( $trail ) ) {
+ $string = substr( $string, strlen( $lead ) );
+ } else {
+ $string = substr( $string, strlen( $lead ), -strlen( $trail ) );
+ }
+
+ // Parse attribute name and value from input.
+ $split = preg_split( '/\s*=\s*/', $string, 2 );
+ $name = $split[0];
+ if ( count( $split ) == 2 ) {
+ $value = $split[1];
+
+ // Remove quotes surrounding $value.
+ // Also guarantee correct quoting in $string for this one attribute.
+ if ( '' == $value ) {
+ $quote = '';
+ } else {
+ $quote = $value[0];
+ }
+ if ( '"' == $quote || "'" == $quote ) {
+ if ( substr( $value, -1 ) != $quote ) {
+ return '';
+ }
+ $value = substr( $value, 1, -1 );
+ } else {
+ $quote = '"';
+ }
+
+ // Sanitize quotes, angle braces, and entities.
+ $value = esc_attr( $value );
+
+ // Sanitize URI values.
+ if ( in_array( strtolower( $name ), $uris ) ) {
+ $value = wp_kses_bad_protocol( $value, $allowed_protocols );
+ }
-function wp_kses_version()
-###############################################################################
-# This function returns kses' version number.
-###############################################################################
-{
+ $string = "$name=$quote$value$quote";
+ $vless = 'n';
+ } else {
+ $value = '';
+ $vless = 'y';
+ }
+
+ // Sanitize attribute by name.
+ wp_kses_attr_check( $name, $value, $string, $vless, $element, $allowed_html );
+
+ // Restore whitespace.
+ return $lead . $string . $trail;
+}
+
+/**
+ * Return a list of allowed tags and attributes for a given context.
+ *
+ * @since 3.5.0
+ *
+ * @global array $allowedposttags
+ * @global array $allowedtags
+ * @global array $allowedentitynames
+ *
+ * @param string $context The context for which to retrieve tags.
+ * Allowed values are post, strip, data,entities, or
+ * the name of a field filter such as pre_user_description.
+ * @return array List of allowed tags and their allowed attributes.
+ */
+function wp_kses_allowed_html( $context = '' ) {
+ global $allowedposttags, $allowedtags, $allowedentitynames;
+
+ if ( is_array( $context ) ) {
+ /**
+ * Filters HTML elements allowed for a given context.
+ *
+ * @since 3.5.0
+ *
+ * @param string $tags Allowed tags, attributes, and/or entities.
+ * @param string $context Context to judge allowed tags by. Allowed values are 'post',
+ * 'data', 'strip', 'entities', 'explicit', or the name of a filter.
+ */
+ return apply_filters( 'wp_kses_allowed_html', $context, 'explicit' );
+ }
+
+ switch ( $context ) {
+ case 'post':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedposttags, $context );
+
+ case 'user_description':
+ case 'pre_user_description':
+ $tags = $allowedtags;
+ $tags['a']['rel'] = true;
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $tags, $context );
+
+ case 'strip':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', array(), $context );
+
+ case 'entities':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedentitynames, $context);
+
+ case 'data':
+ default:
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedtags, $context );
+ }
+}
+
+/**
+ * You add any kses hooks here.
+ *
+ * There is currently only one kses WordPress hook, {@see 'pre_kses'}, 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 {@see 'pre_kses'} hook.
+ */
+function wp_kses_hook( $string, $allowed_html, $allowed_protocols ) {
+ /**
+ * Filters content to be run through kses.
+ *
+ * @since 2.3.0
+ *
+ * @param string $string Content to run through kses.
+ * @param array $allowed_html Allowed HTML elements.
+ * @param array $allowed_protocols Allowed protocol in links.
+ */
+ return apply_filters( 'pre_kses', $string, $allowed_html, $allowed_protocols );
+}
+
+/**
+ * This function returns kses' version number.
+ *
+ * @since 1.0.0
+ *
+ * @return string KSES Version Number
+ */
+function wp_kses_version() {
return '0.2.2';
-} # function wp_kses_version
-
-function wp_kses_split($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
+ *
+ * @global array $pass_allowed_html
+ * @global array $pass_allowed_protocols
+ *
+ * @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
+ *
+ * @global array $pass_allowed_html
+ * @global array $pass_allowed_protocols
+ *
+ * @return string
+ */
+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
+ *
+ * @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($string, 0, 1) != '<')
return '>';
- # It matched a ">" character
+ // It matched a ">" character
- if (preg_match('%^<!--(.*?)(-->)?$%', $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
+ // Allow HTML comments
- if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
+ if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9-]+)([^>]*)>?$%', $string, $matches))
return '';
- # It's seriously malformed
+ // It's seriously malformed
$slash = trim($matches[1]);
$elem = $matches[2];
$attrlist = $matches[3];
- if (!@isset($allowed_html[strtolower($elem)]))
+ if ( ! is_array( $allowed_html ) )
+ $allowed_html = wp_kses_allowed_html( $allowed_html );
+
+ if ( ! isset($allowed_html[strtolower($elem)]) )
return '';
- # They are using a not allowed HTML element
+ // They are using a not allowed HTML element
if ($slash != '')
- return "<$slash$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, $allowed_protocols)
-###############################################################################
-# This function removes all attributes, if none are allowed for this element.
-# If some are allowed it calls wp_kses_hair() to split them further, and then it
-# builds up new HTML code from the data that kses_hair() returns. It also
-# removes "<" and ">" characters, if there are any left. One more thing it
-# does is to check if the tag has a closing XHTML slash, and if it does,
-# it puts one in the returned code as well.
-###############################################################################
-{
- # Is there a closing XHTML slash at the end of the attributes?
+ return "</$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) {
+ if ( ! is_array( $allowed_html ) )
+ $allowed_html = wp_kses_allowed_html( $allowed_html );
+
+ // 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($element)]) == 0)
+ // Are any attributes allowed at all for this element?
+ if ( ! isset($allowed_html[strtolower($element)]) || count($allowed_html[strtolower($element)]) == 0 )
return "<$element$xhtml_slash>";
- # Split it
-
+ // Split it
$attrarr = wp_kses_hair($attr, $allowed_protocols);
- # Go through $attrarr, and save the allowed attributes for this element
- # in $attr2
-
+ // Go through $attrarr, and save the allowed attributes for this element
+ // in $attr2
$attr2 = '';
+ foreach ( $attrarr as $arreach ) {
+ if ( wp_kses_attr_check( $arreach['name'], $arreach['value'], $arreach['whole'], $arreach['vless'], $element, $allowed_html ) ) {
+ $attr2 .= ' '.$arreach['whole'];
+ }
+ }
- foreach ($attrarr as $arreach) {
- if (!@ isset ($allowed_html[strtolower($element)][strtolower($arreach['name'])]))
- continue; # the attribute is not allowed
+ // Remove any "<" or ">" characters
+ $attr2 = preg_replace('/[<>]/', '', $attr2);
- $current = $allowed_html[strtolower($element)][strtolower($arreach['name'])];
- if ($current == '')
- continue; # the attribute is not allowed
+ return "<$element$attr2$xhtml_slash>";
+}
- if (!is_array($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;
- }
+/**
+ * Determine whether an attribute is allowed.
+ *
+ * @since 4.2.3
+ *
+ * @param string $name The attribute name. Returns empty string when not allowed.
+ * @param string $value The attribute value. Returns a filtered value.
+ * @param string $whole The name=value input. Returns filtered input.
+ * @param string $vless 'y' when attribute like "enabled", otherwise 'n'.
+ * @param string $element The name of the element to which this attribute belongs.
+ * @param array $allowed_html The full list of allowed elements and attributes.
+ * @return bool Is the attribute allowed?
+ */
+function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowed_html ) {
+ $allowed_attr = $allowed_html[strtolower( $element )];
+
+ $name_low = strtolower( $name );
+ if ( ! isset( $allowed_attr[$name_low] ) || '' == $allowed_attr[$name_low] ) {
+ $name = $value = $whole = '';
+ return false;
+ }
- if ($ok)
- $attr2 .= ' '.$arreach['whole']; # it passed them
- } # if !is_array($current)
- } # foreach
+ if ( 'style' == $name_low ) {
+ $new_value = safecss_filter_attr( $value );
- # Remove any "<" or ">" characters
+ if ( empty( $new_value ) ) {
+ $name = $value = $whole = '';
+ return false;
+ }
- $attr2 = preg_replace('/[<>]/', '', $attr2);
+ $whole = str_replace( $value, $new_value, $whole );
+ $value = $new_value;
+ }
- return "<$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.
-###############################################################################
-{
- $attrarr = array ();
+ if ( is_array( $allowed_attr[$name_low] ) ) {
+ // there are some checks
+ foreach ( $allowed_attr[$name_low] as $currkey => $currval ) {
+ if ( ! wp_kses_check_attr_val( $value, $vless, $currkey, $currval ) ) {
+ $name = $value = $whole = '';
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
+/**
+ * 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 = '';
+ $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
- # Loop through the whole attribute list
+ // Loop through the whole attribute list
while (strlen($attr) != 0) {
- $working = 0; # Was the last operation successful?
+ $working = 0; // Was the last operation successful?
switch ($mode) {
- case 0 : # attribute name, href for instance
+ case 0 : // attribute name, href for instance
- if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
+ if ( preg_match('/^([-a-zA-Z:]+)/', $attr, $match ) ) {
$attrname = $match[1];
$working = $mode = 1;
- $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
+ $attr = preg_replace( '/^[-a-zA-Z:]+/', '', $attr );
}
break;
- case 1 : # equals sign or valueless ("selected")
+ case 1 : // equals sign or valueless ("selected")
- if (preg_match('/^\s*=\s*/', $attr)) # equals sign
+ if (preg_match('/^\s*=\s*/', $attr)) // equals sign
{
$working = 1;
$mode = 2;
break;
}
- if (preg_match('/^\s+/', $attr)) # valueless
+ if (preg_match('/^\s+/', $attr)) // valueless
{
$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+/', '', $attr);
}
break;
- case 2 : # attribute value, a URL after href= for instance
+ case 2 : // attribute value, a URL after href= for instance
- if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match))
- # "value"
+ if (preg_match('%^"([^"]*)"(\s+|/?$)%', $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, $match))
- # 'value'
+ if (preg_match("%^'([^']*)'(\s+|/?$)%", $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, $match))
- # value
+ if (preg_match("%^([^\s\"']+)(\s+|/?$)%", $attr, $match))
+ // value
{
- $thisval = wp_kses_bad_protocol($match[1], $allowed_protocols);
-
- $attrarr[] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
- # We add quotes to conform to W3C's HTML spec.
+ $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;
$attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
}
break;
- } # switch
+ } // switch
- if ($working == 0) # not well formed, remove and try again
- {
+ if ($working == 0) // not well formed, remove and try again
+ {
$attr = wp_kses_html_error($attr);
$mode = 0;
}
- } # while
+ } // while
+
+ if ($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 $attrarr;
+}
- if ($mode == 1)
- # special case, for when the attribute list ends with a valueless
- # attribute like "selected"
- $attrarr[] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+/**
+ * Finds all attributes of an HTML element.
+ *
+ * Does not modify input. May return "evil" output.
+ *
+ * Based on wp_kses_split2() and wp_kses_attr()
+ *
+ * @since 4.2.3
+ *
+ * @param string $element HTML element/tag
+ * @return array|bool List of attributes found in $element. Returns false on failure.
+ */
+function wp_kses_attr_parse( $element ) {
+ $valid = preg_match('%^(<\s*)(/\s*)?([a-zA-Z0-9]+\s*)([^>]*)(>?)$%', $element, $matches);
+ if ( 1 !== $valid ) {
+ return false;
+ }
+
+ $begin = $matches[1];
+ $slash = $matches[2];
+ $elname = $matches[3];
+ $attr = $matches[4];
+ $end = $matches[5];
+ if ( '' !== $slash ) {
+ // Closing elements do not get parsed.
+ return false;
+ }
+
+ // Is there a closing XHTML slash at the end of the attributes?
+ if ( 1 === preg_match( '%\s*/\s*$%', $attr, $matches ) ) {
+ $xhtml_slash = $matches[0];
+ $attr = substr( $attr, 0, -strlen( $xhtml_slash ) );
+ } else {
+ $xhtml_slash = '';
+ }
+
+ // Split it
+ $attrarr = wp_kses_hair_parse( $attr );
+ if ( false === $attrarr ) {
+ return false;
+ }
+
+ // Make sure all input is returned by adding front and back matter.
+ array_unshift( $attrarr, $begin . $slash . $elname );
+ array_push( $attrarr, $xhtml_slash . $end );
+
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.
-###############################################################################
-{
+}
+
+/**
+ * Builds an attribute list from string containing attributes.
+ *
+ * Does not modify input. May return "evil" output.
+ * In case of unexpected input, returns false instead of stripping things.
+ *
+ * Based on wp_kses_hair() but does not return a multi-dimensional array.
+ *
+ * @since 4.2.3
+ *
+ * @param string $attr Attribute list from HTML element to closing HTML element tag
+ * @return array|bool List of attributes found in $attr. Returns false on failure.
+ */
+function wp_kses_hair_parse( $attr ) {
+ if ( '' === $attr ) {
+ return array();
+ }
+
+ $regex =
+ '(?:'
+ . '[-a-zA-Z:]+' // Attribute name.
+ . '|'
+ . '\[\[?[^\[\]]+\]\]?' // Shortcode in the name position implies unfiltered_html.
+ . ')'
+ . '(?:' // Attribute value.
+ . '\s*=\s*' // All values begin with '='
+ . '(?:'
+ . '"[^"]*"' // Double-quoted
+ . '|'
+ . "'[^']*'" // Single-quoted
+ . '|'
+ . '[^\s"\']+' // Non-quoted
+ . '(?:\s|$)' // Must have a space
+ . ')'
+ . '|'
+ . '(?:\s|$)' // If attribute has no value, space is required.
+ . ')'
+ . '\s*'; // Trailing space is optional except as mentioned above.
+
+ // Although it is possible to reduce this procedure to a single regexp,
+ // we must run that regexp twice to get exactly the expected result.
+
+ $validation = "%^($regex)+$%";
+ $extraction = "%$regex%";
+
+ if ( 1 === preg_match( $validation, $attr ) ) {
+ preg_match_all( $extraction, $attr, $attrarr );
+ return $attrarr[0];
+ } else {
+ return false;
+ }
+}
+
+/**
+ * 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.
+ // 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)
$ok = false;
break;
case 'minlen' :
- # The minlen check makes sure that the attribute value has a length not
- # smaller than the given value.
+ // The minlen check makes sure that the attribute value has a length not
+ // smaller than the given value.
if (strlen($value) < $checkvalue)
$ok = false;
break;
case 'maxval' :
- # The maxval check does two things: it checks that the attribute value is
- # an integer from 0 and up, without an excessive amount of zeroes or
- # whitespace (to avoid Buffer Overflows). It also checks that the attribute
- # value is not greater than the given value.
- # This check can be used to avoid Denial of Service attacks.
+ // The maxval check does two things: it checks that the attribute value is
+ // an integer from 0 and up, without an excessive amount of zeroes or
+ // whitespace (to avoid Buffer Overflows). It also checks that the attribute
+ // value is not greater than the given value.
+ // This check can be used to avoid Denial of Service attacks.
if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
$ok = false;
break;
case 'minval' :
- # The minval check checks that the attribute value is a positive integer,
- # and that it is not smaller than the given value.
+ // The minval check makes sure that the attribute value is a positive integer,
+ // and that it is not smaller than the given value.
if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
$ok = false;
break;
case 'valueless' :
- # The valueless check checks if the attribute has a value
-
# (like <a href="blah">) or not (<option selected>). If the given value
- # is a "y" or a "Y", the attribute must not have a value.
- # If the given value is an "n" or an "N", the attribute must have one.
+ // The valueless check makes sure if the attribute has a value
+
// (like <a href="blah">) or not (<option selected>). If the given value
+ // is a "y" or a "Y", the attribute must not have a value.
+ // If the given value is an "n" or an "N", the attribute must have one.
if (strtolower($checkvalue) != $vless)
$ok = false;
break;
- } # switch
+ } // 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.
-###############################################################################
-{
- $string = preg_replace('/\0+/', '', $string);
- $string = preg_replace('/(\\\\0)+/', '', $string);
+/**
+ * Removes any invalid control characters in $string.
+ *
+ * Also removes any instance of the '\0' string.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string
+ * @param array $options Set 'slash_zero' => 'keep' when '\0' is allowed. Default is 'remove'.
+ * @return string
+ */
+function wp_kses_no_null( $string, $options = null ) {
+ if ( ! isset( $options['slash_zero'] ) ) {
+ $options = array( 'slash_zero' => 'remove' );
+ }
+
+ $string = preg_replace( '/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $string );
+ if ( 'remove' == $options['slash_zero'] ) {
+ $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
+ } // 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.
-###############################################################################
-{
- 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.
-###############################################################################
-{
- # Disarm all entities by converting & to &
+}
+/**
+ * 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);
+ // Change back the allowed entities in our entity whitelist
+ $string = preg_replace_callback('/&([A-Za-z]{2,8}[0-9]{0,2});/', '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
+ *
+ * @global array $allowedentitynames
+ *
+ * @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 $string;
-} # function wp_kses_decode_entities
+}
-function wp_filter_kses($data) {
- global $allowedtags;
- return addslashes( wp_kses(stripslashes( $data ), $allowedtags) );
+/**
+ * Regex callback for wp_kses_decode_entities()
+ *
+ * @param array $match preg match
+ * @return string
+ */
+function _wp_kses_decode_entities_chr( $match ) {
+ return chr( $match[1] );
}
-function wp_filter_post_kses($data) {
- global $allowedposttags;
- return addslashes ( wp_kses(stripslashes( $data ), $allowedposttags) );
+/**
+ * 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( $match[1] ) );
}
-function wp_filter_nohtml_kses($data) {
- return addslashes ( wp_kses(stripslashes( $data ), array()) );
+/**
+ * Sanitize content with allowed HTML Kses rules.
+ *
+ * @since 1.0.0
+ *
+ * @param string $data Content to filter, expected to be escaped with slashes
+ * @return string Filtered content
+ */
+function wp_filter_kses( $data ) {
+ return addslashes( wp_kses( stripslashes( $data ), current_filter() ) );
}
+/**
+ * Sanitize content with allowed HTML Kses rules.
+ *
+ * @since 2.9.0
+ *
+ * @param string $data Content to filter, expected to not be escaped
+ * @return string Filtered content
+ */
+function wp_kses_data( $data ) {
+ return wp_kses( $data, current_filter() );
+}
+
+/**
+ * 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
+ *
+ * @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 ) {
+ return addslashes( wp_kses( stripslashes( $data ), 'post' ) );
+}
+
+/**
+ * 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
+ *
+ * @param string $data Post content to filter
+ * @return string Filtered post content with allowed HTML tags and attributes intact.
+ */
+function wp_kses_post( $data ) {
+ return wp_kses( $data, 'post' );
+}
+
+/**
+ * Navigates through an array, object, or scalar, and sanitizes content for
+ * allowed HTML tags for post content.
+ *
+ * @since 4.4.2
+ *
+ * @see map_deep()
+ *
+ * @param mixed $data The array, object, or scalar value to inspect.
+ * @return mixed The filtered content.
+ */
+function wp_kses_post_deep( $data ) {
+ return map_deep( $data, 'wp_kses_post' );
+}
+
+/**
+ * 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 ), 'strip' ) );
+}
+
+/**
+ * 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
+ */
function kses_init_filters() {
- // Normal filtering.
- add_filter('pre_comment_content', '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');
}
+/**
+ * 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 {@see 'init'} hook (priority is
+ * default). Also does not remove kses_init() function from {@see 'set_current_user'}
+ * hook (priority is also default).
+ *
+ * @since 2.0.6
+ */
function kses_remove_filters() {
- // Normal filtering.
- remove_filter('pre_comment_content', 'wp_filter_kses');
+ // 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 {@see 'init'} hook and
+ * {@see '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.
+ *
+ * @since 2.0.0
+ */
function kses_init() {
kses_remove_filters();
- if (current_user_can('unfiltered_html') == false)
+ if ( ! current_user_can( 'unfiltered_html' ) ) {
kses_init_filters();
+ }
+}
+
+/**
+ * Inline CSS filter
+ *
+ * @since 2.8.1
+ *
+ * @param string $css A string of CSS rules.
+ * @param string $deprecated Not used.
+ * @return string Filtered string of CSS rules.
+ */
+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 ) );
+
+ /**
+ * Filters list of allowed CSS attributes.
+ *
+ * @since 2.8.1
+ * @since 4.4.0 Added support for `min-height`, `max-height`, `min-width`, and `max-width`.
+ * @since 4.6.0 Added support for `list-style-type`.
+ *
+ * @param array $attr List of allowed CSS attributes.
+ */
+ $allowed_attr = apply_filters( 'safe_style_css', array(
+ 'background',
+ 'background-color',
+
+ 'border',
+ 'border-width',
+ 'border-color',
+ 'border-style',
+ 'border-right',
+ 'border-right-color',
+ 'border-right-style',
+ 'border-right-width',
+ 'border-bottom',
+ 'border-bottom-color',
+ 'border-bottom-style',
+ 'border-bottom-width',
+ 'border-left',
+ 'border-left-color',
+ 'border-left-style',
+ 'border-left-width',
+ 'border-top',
+ 'border-top-color',
+ 'border-top-style',
+ 'border-top-width',
+
+ 'border-spacing',
+ 'border-collapse',
+ 'caption-side',
+
+ 'color',
+ 'font',
+ 'font-family',
+ 'font-size',
+ 'font-style',
+ 'font-variant',
+ 'font-weight',
+ 'letter-spacing',
+ 'line-height',
+ 'text-decoration',
+ 'text-indent',
+ 'text-align',
+
+ 'height',
+ 'min-height',
+ 'max-height',
+
+ 'width',
+ 'min-width',
+ 'max-width',
+
+ 'margin',
+ 'margin-right',
+ 'margin-bottom',
+ 'margin-left',
+ 'margin-top',
+
+ 'padding',
+ 'padding-right',
+ 'padding-bottom',
+ 'padding-left',
+ 'padding-top',
+
+ 'clear',
+ 'cursor',
+ 'direction',
+ 'float',
+ 'overflow',
+ 'vertical-align',
+ 'list-style-type',
+ ) );
+
+ if ( empty($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;
}
-add_action('init', 'kses_init');
-add_action('set_current_user', 'kses_init');
-?>
+/**
+ * Helper function to add global attributes to a tag in the allowed html list.
+ *
+ * @since 3.5.0
+ * @access private
+ *
+ * @param array $value An array of attributes.
+ * @return array The array of attributes with global attributes added.
+ */
+function _wp_add_global_attributes( $value ) {
+ $global_attributes = array(
+ 'class' => true,
+ 'id' => true,
+ 'style' => true,
+ 'title' => true,
+ 'role' => true,
+ );
+
+ if ( true === $value )
+ $value = array();
+
+ if ( is_array( $value ) )
+ return array_merge( $value, $global_attributes );
+
+ return $value;
+}
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff