--- a/web/wp-includes/kses.php Tue Feb 02 14:45:47 2010 +0000
+++ b/web/wp-includes/kses.php Tue Feb 02 15:44:16 2010 +0000
@@ -1,1195 +1,1243 @@
-<?php
-/**
- * HTML/XHTML filter that only allows some elements and attributes
- *
- * Added wp_ prefix to avoid conflicts with existing kses users
- *
- * @version 0.2.2
- * @copyright (C) 2002, 2003, 2005
- * @author Ulf Harnhammar <metaur@users.sourceforge.net>
- *
- * @package External
- * @subpackage KSES
- *
- * @internal
- * *** 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!]
- */
-
-/**
- * You can override this in your my-hacks.php file You can also override this
- * in a plugin file. The my-hacks.php is deprecated in its usage.
- *
- * @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' => array (),
- 'href' => array (),
- 'id' => array (),
- 'title' => array (),
- 'rel' => array (),
- 'rev' => array (),
- 'name' => array (),
- 'target' => array()),
- 'abbr' => array(
- 'class' => array (),
- 'title' => array ()),
- 'acronym' => array(
- 'title' => array ()),
- 'b' => array(),
- 'big' => array(),
- 'blockquote' => array(
- 'id' => array (),
- 'cite' => array (),
- 'class' => array(),
- 'lang' => array(),
- 'xml:lang' => array()),
- 'br' => array (
- 'class' => array ()),
- 'button' => array(
- 'disabled' => array (),
- 'name' => array (),
- 'type' => array (),
- 'value' => array ()),
- 'caption' => array(
- 'align' => array (),
- 'class' => array ()),
- 'cite' => array (
- 'class' => array(),
- 'dir' => array(),
- 'lang' => array(),
- 'title' => array ()),
- 'code' => array (
- 'style' => array()),
- 'col' => array(
- 'align' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'span' => array (),
- 'dir' => array(),
- 'style' => array (),
- 'valign' => array (),
- 'width' => array ()),
- 'del' => array(
- 'datetime' => array ()),
- 'dd' => array(),
- 'div' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => 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 (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h2' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h3' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h4' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h5' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h6' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'hr' => array (
- 'align' => array (),
- 'class' => array (),
- 'noshade' => array (),
- 'size' => array (),
- 'width' => array ()),
- 'i' => array(),
- 'img' => array(
- 'alt' => array (),
- 'align' => array (),
- 'border' => array (),
- 'class' => array (),
- 'height' => array (),
- 'hspace' => array (),
- 'longdesc' => array (),
- 'vspace' => array (),
- 'src' => array (),
- 'style' => array (),
- 'width' => array ()),
- 'ins' => array(
- 'datetime' => array (),
- 'cite' => array ()),
- 'kbd' => array(),
- 'label' => array(
- 'for' => array ()),
- 'legend' => array(
- 'align' => array ()),
- 'li' => array (
- 'align' => array (),
- 'class' => array ()),
- 'p' => array(
- 'class' => array (),
- 'align' => array (),
- 'dir' => array(),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array()),
- 'pre' => array(
- 'style' => array(),
- 'width' => array ()),
- 'q' => array(
- 'cite' => array ()),
- 's' => array(),
- 'span' => array (
- 'class' => array (),
- 'dir' => array (),
- 'align' => array (),
- 'lang' => array (),
- 'style' => array (),
- 'title' => array (),
- 'xml:lang' => array()),
- 'strike' => array(),
- 'strong' => array(),
- 'sub' => array(),
- 'sup' => array(),
- 'table' => array(
- 'align' => array (),
- 'bgcolor' => array (),
- 'border' => array (),
- 'cellpadding' => array (),
- 'cellspacing' => array (),
- 'class' => array (),
- 'dir' => array(),
- 'id' => array(),
- 'rules' => array (),
- 'style' => 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 (),
- 'class' => array (),
- 'colspan' => array (),
- 'dir' => array(),
- 'headers' => array (),
- 'height' => array (),
- 'nowrap' => array (),
- 'rowspan' => array (),
- 'scope' => array (),
- 'style' => array (),
- 'valign' => array (),
- 'width' => array ()),
- 'textarea' => array(
- 'cols' => array (),
- 'rows' => array (),
- 'disabled' => array (),
- 'name' => array (),
- 'readonly' => array ()),
- 'tfoot' => array(
- 'align' => array (),
- 'char' => array (),
- 'class' => array (),
- 'charoff' => array (),
- 'valign' => array ()),
- 'th' => array(
- 'abbr' => array (),
- 'align' => array (),
- 'axis' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => 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 (),
- 'class' => array (),
- 'valign' => array ()),
- 'title' => array(),
- 'tr' => array(
- 'align' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'style' => array (),
- 'valign' => array ()),
- 'tt' => array(),
- 'u' => array(),
- 'ul' => array (
- 'class' => array (),
- 'style' => array (),
- 'type' => array ()),
- 'ol' => array (
- 'class' => array (),
- 'start' => array (),
- 'style' => array (),
- 'type' => array ()),
- 'var' => array ());
-
- /**
- * Kses allowed HTML elements.
- *
- * @global array $allowedtags
- * @since 1.0.0
- */
- $allowedtags = array(
- 'a' => array(
- 'href' => array (),
- 'title' => array ()),
- 'abbr' => array(
- 'title' => array ()),
- 'acronym' => array(
- 'title' => array ()),
- 'b' => array(),
- 'blockquote' => array(
- 'cite' => array ()),
- // 'br' => array(),
- 'cite' => array (),
- 'code' => array(),
- 'del' => array(
- 'datetime' => array ()),
- // 'dd' => array(),
- // 'dl' => array(),
- // 'dt' => array(),
- 'em' => array (), 'i' => array (),
- // 'ins' => array('datetime' => array(), 'cite' => array()),
- // 'li' => array(),
- // 'ol' => array(),
- // 'p' => array(),
- 'q' => array(
- 'cite' => array ()),
- 'strike' => array(),
- 'strong' => array(),
- // 'sub' => array(),
- // 'sup' => array(),
- // 'u' => array(),
- // 'ul' => array(),
- );
-}
-
-/**
- * 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', and finally 'telnet. 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 ('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet')) {
- $string = wp_kses_no_null($string);
- $string = wp_kses_js_entities($string);
- $string = wp_kses_normalize_entities($string);
- $allowed_html_fixed = wp_kses_array_lc($allowed_html);
- $string = wp_kses_hook($string, $allowed_html_fixed, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
- return wp_kses_split($string, $allowed_html_fixed, $allowed_protocols);
-}
-
-/**
- * You add any kses hooks here.
- *
- * There is currently only one kses WordPress hook and it is called here. All
- * parameters are passed to the hooks and expected to recieve a string.
- *
- * @since 1.0.0
- *
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Allowed protocol in links
- * @return string Filtered content through 'pre_kses' hook
- */
-function wp_kses_hook($string, $allowed_html, $allowed_protocols) {
- $string = apply_filters('pre_kses', $string, $allowed_html, $allowed_protocols);
- return $string;
-}
-
-/**
- * This function returns kses' version number.
- *
- * @since 1.0.0
- *
- * @return string KSES Version Number
- */
-function wp_kses_version() {
- return '0.2.2';
-}
-
-/**
- * Searches for HTML tags, no matter how malformed.
- *
- * It also matches stray ">" characters.
- *
- * @since 1.0.0
- *
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Content with fixed HTML tags
- */
-function wp_kses_split($string, $allowed_html, $allowed_protocols) {
- global $pass_allowed_html, $pass_allowed_protocols;
- $pass_allowed_html = $allowed_html;
- $pass_allowed_protocols = $allowed_protocols;
- return preg_replace_callback('%((<!--.*?(-->|$))|(<[^>]*(>|$)|>))%',
- create_function('$match', 'global $pass_allowed_html, $pass_allowed_protocols; return wp_kses_split2($match[1], $pass_allowed_html, $pass_allowed_protocols);'), $string);
-}
-
-/**
- * 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) )
- $string = $newstring;
- if ( $string == '' )
- return '';
- // prevent multiple dashes in comments
- $string = preg_replace('/--+/', '-', $string);
- // prevent three dashes closing a comment
- $string = preg_replace('/-$/', '', $string);
- return "<!--{$string}-->";
- }
- # Allow HTML comments
-
- if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
- return '';
- # It's seriously malformed
-
- $slash = trim($matches[1]);
- $elem = $matches[2];
- $attrlist = $matches[3];
-
- if (!@isset($allowed_html[strtolower($elem)]))
- return '';
- # They are using a not allowed HTML element
-
- if ($slash != '')
- return "<$slash$elem>";
- # No attributes are allowed for closing elements
-
- return wp_kses_attr("$slash$elem", $attrlist, $allowed_html, $allowed_protocols);
-}
-
-/**
- * Removes all attributes, if none are allowed for this element.
- *
- * If some are allowed it calls wp_kses_hair() to split them further, and then
- * it builds up new HTML code from the data that kses_hair() returns. It also
- * removes "<" and ">" characters, if there are any left. One more thing it does
- * is to check if the tag has a closing XHTML slash, and if it does, it puts one
- * in the returned code as well.
- *
- * @since 1.0.0
- *
- * @param string $element HTML element/tag
- * @param string $attr HTML attributes from HTML element to closing HTML element tag
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Sanitized HTML element
- */
-function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
- # Is there a closing XHTML slash at the end of the attributes?
-
- $xhtml_slash = '';
- if (preg_match('%\s/\s*$%', $attr))
- $xhtml_slash = ' /';
-
- # Are any attributes allowed at all for this element?
-
- if (@ count($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
-
- $attr2 = '';
-
- foreach ($attrarr as $arreach) {
- if (!@ isset ($allowed_html[strtolower($element)][strtolower($arreach['name'])]))
- continue; # the attribute is not allowed
-
- $current = $allowed_html[strtolower($element)][strtolower($arreach['name'])];
- if ($current == '')
- continue; # the attribute is not allowed
-
- if (!is_array($current))
- $attr2 .= ' '.$arreach['whole'];
- # there are no checks
-
- else {
- # there are some checks
- $ok = true;
- foreach ($current as $currkey => $currval)
- if (!wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval)) {
- $ok = false;
- break;
- }
-
- if ( $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, $arreach['whole']);
- }
-
- if ($ok)
- $attr2 .= ' '.$arreach['whole']; # it passed them
- } # if !is_array($current)
- } # foreach
-
- # Remove any "<" or ">" characters
-
- $attr2 = preg_replace('/[<>]/', '', $attr2);
-
- return "<$element$attr2$xhtml_slash>";
-}
-
-/**
- * Builds an attribute list from string containing attributes.
- *
- * This function does a lot of work. It parses an attribute list into an array
- * with attribute data, and tries to do the right thing even if it gets weird
- * input. It will add quotes around attribute values that don't have any quotes
- * or apostrophes around them, to make it easier to produce HTML code that will
- * conform to W3C's HTML specification. It will also remove bad URL protocols
- * from attribute values. It also reduces duplicate attributes by using the
- * attribute defined first (foo='bar' foo='baz' will result in foo='bar').
- *
- * @since 1.0.0
- *
- * @param string $attr Attribute list from HTML element to closing HTML element tag
- * @param array $allowed_protocols Allowed protocols to keep
- * @return array List of attributes after parsing
- */
-function wp_kses_hair($attr, $allowed_protocols) {
- $attrarr = array ();
- $mode = 0;
- $attrname = '';
- $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
-
- # Loop through the whole attribute list
-
- while (strlen($attr) != 0) {
- $working = 0; # Was the last operation successful?
-
- switch ($mode) {
- case 0 : # attribute name, href for instance
-
- if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
- $attrname = $match[1];
- $working = $mode = 1;
- $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
- }
-
- break;
-
- case 1 : # equals sign or valueless ("selected")
-
- if (preg_match('/^\s*=\s*/', $attr)) # equals sign
- {
- $working = 1;
- $mode = 2;
- $attr = preg_replace('/^\s*=\s*/', '', $attr);
- break;
- }
-
- if (preg_match('/^\s+/', $attr)) # valueless
- {
- $working = 1;
- $mode = 0;
- if(FALSE === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
- }
- $attr = preg_replace('/^\s+/', '', $attr);
- }
-
- break;
-
- case 2 : # attribute value, a URL after href= for instance
-
- if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match))
- # "value"
- {
- $thisval = $match[1];
- if ( in_array($attrname, $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
-
- if(FALSE === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
- }
- $working = 1;
- $mode = 0;
- $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
- break;
- }
-
- if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match))
- # 'value'
- {
- $thisval = $match[1];
- if ( in_array($attrname, $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
-
- if(FALSE === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname='$thisval'", 'vless' => 'n');
- }
- $working = 1;
- $mode = 0;
- $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
- break;
- }
-
- if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match))
- # value
- {
- $thisval = $match[1];
- if ( in_array($attrname, $uris) )
- $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
-
- if(FALSE === array_key_exists($attrname, $attrarr)) {
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
- }
- # We add quotes to conform to W3C's HTML spec.
- $working = 1;
- $mode = 0;
- $attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
- }
-
- break;
- } # switch
-
- if ($working == 0) # not well formed, remove and try again
- {
- $attr = wp_kses_html_error($attr);
- $mode = 0;
- }
- } # while
-
- if ($mode == 1 && FALSE === array_key_exists($attrname, $attrarr))
- # special case, for when the attribute list ends with a valueless
- # attribute like "selected"
- $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
-
- return $attrarr;
-}
-
-/**
- * Performs different checks for attribute values.
- *
- * The currently implemented checks are "maxlen", "minlen", "maxval", "minval"
- * and "valueless" with even more checks to come soon.
- *
- * @since 1.0.0
- *
- * @param string $value Attribute value
- * @param string $vless Whether the value is valueless or not. Use 'y' or 'n'
- * @param string $checkname What $checkvalue is checking for.
- * @param mixed $checkvalue What constraint the value should pass
- * @return bool Whether check passes (true) or not (false)
- */
-function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
- $ok = true;
-
- switch (strtolower($checkname)) {
- case 'maxlen' :
- # The maxlen check makes sure that the attribute value has a length not
- # greater than the given value. This can be used to avoid Buffer Overflows
- # in WWW clients and various Internet servers.
-
- if (strlen($value) > $checkvalue)
- $ok = false;
- break;
-
- case 'minlen' :
- # The minlen check makes sure that the attribute value has a length not
- # smaller than the given value.
-
- if (strlen($value) < $checkvalue)
- $ok = false;
- break;
-
- case 'maxval' :
- # The maxval check does two things: it checks that the attribute value is
- # an integer from 0 and up, without an excessive amount of zeroes or
- # whitespace (to avoid Buffer Overflows). It also checks that the attribute
- # value is not greater than the given value.
- # This check can be used to avoid Denial of Service attacks.
-
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
- $ok = false;
- if ($value > $checkvalue)
- $ok = false;
- break;
-
- case 'minval' :
- # The minval check checks that the attribute value is a positive integer,
- # and that it is not smaller than the given value.
-
- if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
- $ok = false;
- if ($value < $checkvalue)
- $ok = false;
- break;
-
- case 'valueless' :
- # The valueless check checks if the attribute has a value
- # (like <a href="blah">) or not (<option selected>). If the given value
- # is a "y" or a "Y", the attribute must not have a value.
- # If the given value is an "n" or an "N", the attribute must have one.
-
- if (strtolower($checkvalue) != $vless)
- $ok = false;
- break;
- } # switch
-
- return $ok;
-}
-
-/**
- * Sanitize string from bad protocols.
- *
- * This function removes all non-allowed protocols from the beginning of
- * $string. It ignores whitespace and the case of the letters, and it does
- * understand HTML entities. It does its work in a while loop, so it won't be
- * fooled by a string like "javascript:javascript:alert(57)".
- *
- * @since 1.0.0
- *
- * @param string $string Content to filter bad protocols from
- * @param array $allowed_protocols Allowed protocols to keep
- * @return string Filtered content
- */
-function wp_kses_bad_protocol($string, $allowed_protocols) {
- $string = wp_kses_no_null($string);
- $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
- $string2 = $string.'a';
-
- while ($string != $string2) {
- $string2 = $string;
- $string = wp_kses_bad_protocol_once($string, $allowed_protocols);
- } # while
-
- return $string;
-}
-
-/**
- * Removes any NULL characters in $string.
- *
- * @since 1.0.0
- *
- * @param string $string
- * @return string
- */
-function wp_kses_no_null($string) {
- $string = preg_replace('/\0+/', '', $string);
- $string = preg_replace('/(\\\\0)+/', '', $string);
-
- return $string;
-}
-
-/**
- * Strips slashes from in front of quotes.
- *
- * This function changes the character sequence \" to just ". It leaves all
- * other slashes alone. It's really weird, but the quoting from
- * preg_replace(//e) seems to require this.
- *
- * @since 1.0.0
- *
- * @param string $string String to strip slashes
- * @return string Fixed strings with quoted slashes
- */
-function wp_kses_stripslashes($string) {
- return preg_replace('%\\\\"%', '"', $string);
-}
-
-/**
- * Goes through an array and changes the keys to all lower case.
- *
- * @since 1.0.0
- *
- * @param array $inarray Unfiltered array
- * @return array Fixed array with all lowercase keys
- */
-function wp_kses_array_lc($inarray) {
- $outarray = array ();
-
- foreach ( (array) $inarray as $inkey => $inval) {
- $outkey = strtolower($inkey);
- $outarray[$outkey] = array ();
-
- foreach ( (array) $inval as $inkey2 => $inval2) {
- $outkey2 = strtolower($inkey2);
- $outarray[$outkey][$outkey2] = $inval2;
- } # foreach $inval
- } # foreach $inarray
-
- return $outarray;
-}
-
-/**
- * Removes the HTML JavaScript entities found in early versions of Netscape 4.
- *
- * @since 1.0.0
- *
- * @param string $string
- * @return string
- */
-function wp_kses_js_entities($string) {
- return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
-}
-
-/**
- * Handles parsing errors in wp_kses_hair().
- *
- * The general plan is to remove everything to and including some whitespace,
- * but it deals with quotes and apostrophes as well.
- *
- * @since 1.0.0
- *
- * @param string $string
- * @return string
- */
-function wp_kses_html_error($string) {
- return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string);
-}
-
-/**
- * Sanitizes content from bad protocols and other characters.
- *
- * This function searches for URL protocols at the beginning of $string, while
- * handling whitespace and HTML entities.
- *
- * @since 1.0.0
- *
- * @param string $string Content to check for bad protocols
- * @param string $allowed_protocols Allowed protocols
- * @return string Sanitized content
- */
-function wp_kses_bad_protocol_once($string, $allowed_protocols) {
- global $_kses_allowed_protocols;
- $_kses_allowed_protocols = $allowed_protocols;
-
- $string2 = preg_split('/:|:|:/i', $string, 2);
- if ( isset($string2[1]) && !preg_match('%/\?%', $string2[0]) )
- $string = wp_kses_bad_protocol_once2($string2[0]) . trim($string2[1]);
- else
- $string = preg_replace_callback('/^((&[^;]*;|[\sA-Za-z0-9])*)'.'(:|:|&#[Xx]3[Aa];)\s*/', 'wp_kses_bad_protocol_once2', $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
- * white-list or not, and returns different data depending on the answer.
- *
- * @access private
- * @since 1.0.0
- *
- * @param mixed $matches string or preg_replace_callback() matches array to check for bad protocols
- * @return string Sanitized content
- */
-function wp_kses_bad_protocol_once2($matches) {
- global $_kses_allowed_protocols;
-
- if ( is_array($matches) ) {
- if ( ! isset($matches[1]) || empty($matches[1]) )
- return '';
-
- $string = $matches[1];
- } else {
- $string = $matches;
- }
-
- $string2 = wp_kses_decode_entities($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 ( (array) $_kses_allowed_protocols as $one_protocol)
- if (strtolower($one_protocol) == $string2) {
- $allowed = true;
- break;
- }
-
- if ($allowed)
- return "$string2:";
- else
- return '';
-}
-
-/**
- * Converts and fixes HTML entities.
- *
- * This function normalizes HTML entities. It will convert "AT&T" to the correct
- * "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
- *
- * @since 1.0.0
- *
- * @param string $string Content to normalize entities
- * @return string Content with normalized entities
- */
-function wp_kses_normalize_entities($string) {
- # Disarm all entities by converting & to &
-
- $string = str_replace('&', '&', $string);
-
- # Change back the allowed entities in our entity whitelist
-
- $string = preg_replace('/&([A-Za-z][A-Za-z0-9]{0,19});/', '&\\1;', $string);
- $string = preg_replace_callback('/&#0*([0-9]{1,5});/', 'wp_kses_normalize_entities2', $string);
- $string = preg_replace_callback('/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', 'wp_kses_normalize_entities3', $string);
-
- return $string;
-}
-
-/**
- * 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 ( ! isset($matches[1]) || empty($matches[1]) )
- return '';
-
- $i = $matches[1];
- return ( ( ! valid_unicode($i) ) || ($i > 65535) ? "&#$i;" : "&#$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 ( ! isset($matches[2]) || empty($matches[2]) )
- return '';
-
- $hexchars = $matches[2];
- return ( ( ! valid_unicode(hexdec($hexchars)) ) ? "&#x$hexchars;" : "&#x$hexchars;" );
-}
-
-/**
- * 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) {
- $string = preg_replace_callback('/&#([0-9]+);/', create_function('$match', 'return chr($match[1]);'), $string);
- $string = preg_replace_callback('/&#[Xx]([0-9A-Fa-f]+);/', create_function('$match', 'return chr(hexdec($match[1]));'), $string);
-
- return $string;
-}
-
-/**
- * Sanitize content with allowed HTML Kses rules.
- *
- * @since 1.0.0
- * @uses $allowedtags
- *
- * @param string $data Content to filter
- * @return string Filtered content
- */
-function wp_filter_kses($data) {
- global $allowedtags;
- return addslashes( wp_kses(stripslashes( $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 $data Post content to filter
- * @return string Filtered post content with allowed HTML tags and attributes intact.
- */
-function wp_filter_post_kses($data) {
- global $allowedposttags;
- return addslashes ( wp_kses(stripslashes( $data ), $allowedposttags) );
-}
-
-/**
- * Strips all of the HTML in the content.
- *
- * @since 2.1.0
- *
- * @param string $data Content to strip all HTML from
- * @return string Filtered content without any HTML
- */
-function wp_filter_nohtml_kses($data) {
- return addslashes ( wp_kses(stripslashes( $data ), array()) );
-}
-
-/**
- * Adds all Kses input form content filters.
- *
- * All hooks have default priority. The wp_filter_kses() function is added to
- * the 'pre_comment_content' and 'title_save_pre' hooks.
- *
- * The wp_filter_post_kses() function is added to the 'content_save_pre',
- * 'excerpt_save_pre', and 'content_filtered_save_pre' hooks.
- *
- * @since 2.0.0
- * @uses add_filter() See description for what functions are added to what hooks.
- */
-function kses_init_filters() {
- // Normal filtering.
- add_filter('pre_comment_content', 'wp_filter_kses');
- add_filter('title_save_pre', 'wp_filter_kses');
-
- // Post filtering
- add_filter('content_save_pre', 'wp_filter_post_kses');
- add_filter('excerpt_save_pre', 'wp_filter_post_kses');
- add_filter('content_filtered_save_pre', 'wp_filter_post_kses');
-}
-
-/**
- * Removes all Kses input form content filters.
- *
- * A quick procedural method to removing all of the filters that kses uses for
- * content in WordPress Loop.
- *
- * Does not remove the kses_init() function from 'init' hook (priority is
- * default). Also does not remove kses_init() function from 'set_current_user'
- * hook (priority is also default).
- *
- * @since 2.0.6
- */
-function kses_remove_filters() {
- // Normal filtering.
- remove_filter('pre_comment_content', 'wp_filter_kses');
- remove_filter('title_save_pre', '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');
-
-function safecss_filter_attr( $css, $deprecated = '' ) {
- $css = wp_kses_no_null($css);
- $css = str_replace(array("\n","\r","\t"), '', $css);
-
- if ( preg_match( '%[\\(&]|/\*%', $css ) ) // remove any inline css containing \ ( & or comments
- return '';
-
- $css_array = split( ';', 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 = split( ':', $css_item );
- if ( in_array( trim( $parts[0] ), $allowed_attr ) )
- $found = true;
- }
- if ( $found ) {
- if( $css != '' )
- $css .= ';';
- $css .= $css_item;
- }
- }
-
- return $css;
-}
+<?php
+/**
+ * HTML/XHTML filter that only allows some elements and attributes
+ *
+ * Added wp_ prefix to avoid conflicts with existing kses users
+ *
+ * @version 0.2.2
+ * @copyright (C) 2002, 2003, 2005
+ * @author Ulf Harnhammar <metaur@users.sourceforge.net>
+ *
+ * @package External
+ * @subpackage KSES
+ *
+ * @internal
+ * *** 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!]
+ */
+
+/**
+ * You can override this in your my-hacks.php file You can also override this
+ * in a plugin file. The my-hacks.php is deprecated in its usage.
+ *
+ * @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' => array (),
+ 'href' => array (),
+ 'id' => array (),
+ 'title' => array (),
+ 'rel' => array (),
+ 'rev' => array (),
+ 'name' => array (),
+ 'target' => array()),
+ 'abbr' => array(
+ 'class' => array (),
+ 'title' => array ()),
+ 'acronym' => array(
+ 'title' => array ()),
+ 'b' => array(),
+ 'big' => array(),
+ 'blockquote' => array(
+ 'id' => array (),
+ 'cite' => array (),
+ 'class' => array(),
+ 'lang' => array(),
+ 'xml:lang' => array()),
+ 'br' => array (
+ 'class' => array ()),
+ 'button' => array(
+ 'disabled' => array (),
+ 'name' => array (),
+ 'type' => array (),
+ 'value' => array ()),
+ 'caption' => array(
+ 'align' => array (),
+ 'class' => array ()),
+ 'cite' => array (
+ 'class' => array(),
+ 'dir' => array(),
+ 'lang' => array(),
+ 'title' => array ()),
+ 'code' => array (
+ 'style' => array()),
+ 'col' => array(
+ 'align' => array (),
+ 'char' => array (),
+ 'charoff' => array (),
+ 'span' => array (),
+ 'dir' => array(),
+ 'style' => array (),
+ 'valign' => array (),
+ 'width' => array ()),
+ 'del' => array(
+ 'datetime' => array ()),
+ 'dd' => array(),
+ 'div' => array(
+ 'align' => array (),
+ 'class' => array (),
+ 'dir' => array (),
+ 'lang' => array(),
+ 'style' => array (),
+ 'xml:lang' => 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 (),
+ 'class' => array (),
+ 'id' => array (),
+ 'style' => array ()),
+ 'h2' => array (
+ 'align' => array (),
+ 'class' => array (),
+ 'id' => array (),
+ 'style' => array ()),
+ 'h3' => array (
+ 'align' => array (),
+ 'class' => array (),
+ 'id' => array (),
+ 'style' => array ()),
+ 'h4' => array (
+ 'align' => array (),
+ 'class' => array (),
+ 'id' => array (),
+ 'style' => array ()),
+ 'h5' => array (
+ 'align' => array (),
+ 'class' => array (),
+ 'id' => array (),
+ 'style' => array ()),
+ 'h6' => array (
+ 'align' => array (),
+ 'class' => array (),
+ 'id' => array (),
+ 'style' => array ()),
+ 'hr' => array (
+ 'align' => array (),
+ 'class' => array (),
+ 'noshade' => array (),
+ 'size' => array (),
+ 'width' => array ()),
+ 'i' => array(),
+ 'img' => array(
+ 'alt' => array (),
+ 'align' => array (),
+ 'border' => array (),
+ 'class' => array (),
+ 'height' => array (),
+ 'hspace' => array (),
+ 'longdesc' => array (),
+ 'vspace' => array (),
+ 'src' => array (),
+ 'style' => array (),
+ 'width' => array ()),
+ 'ins' => array(
+ 'datetime' => array (),
+ 'cite' => array ()),
+ 'kbd' => array(),
+ 'label' => array(
+ 'for' => array ()),
+ 'legend' => array(
+ 'align' => array ()),
+ 'li' => array (
+ 'align' => array (),
+ 'class' => array ()),
+ 'p' => array(
+ 'class' => array (),
+ 'align' => array (),
+ 'dir' => array(),
+ 'lang' => array(),
+ 'style' => array (),
+ 'xml:lang' => array()),
+ 'pre' => array(
+ 'style' => array(),
+ 'width' => array ()),
+ 'q' => array(
+ 'cite' => array ()),
+ 's' => array(),
+ 'span' => array (
+ 'class' => array (),
+ 'dir' => array (),
+ 'align' => array (),
+ 'lang' => array (),
+ 'style' => array (),
+ 'title' => array (),
+ 'xml:lang' => array()),
+ 'strike' => array(),
+ 'strong' => array(),
+ 'sub' => array(),
+ 'sup' => array(),
+ 'table' => array(
+ 'align' => array (),
+ 'bgcolor' => array (),
+ 'border' => array (),
+ 'cellpadding' => array (),
+ 'cellspacing' => array (),
+ 'class' => array (),
+ 'dir' => array(),
+ 'id' => array(),
+ 'rules' => array (),
+ 'style' => 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 (),
+ 'class' => array (),
+ 'colspan' => array (),
+ 'dir' => array(),
+ 'headers' => array (),
+ 'height' => array (),
+ 'nowrap' => array (),
+ 'rowspan' => array (),
+ 'scope' => array (),
+ 'style' => array (),
+ 'valign' => array (),
+ 'width' => array ()),
+ 'textarea' => array(
+ 'cols' => array (),
+ 'rows' => array (),
+ 'disabled' => array (),
+ 'name' => array (),
+ 'readonly' => array ()),
+ 'tfoot' => array(
+ 'align' => array (),
+ 'char' => array (),
+ 'class' => array (),
+ 'charoff' => array (),
+ 'valign' => array ()),
+ 'th' => array(
+ 'abbr' => array (),
+ 'align' => array (),
+ 'axis' => array (),
+ 'bgcolor' => array (),
+ 'char' => array (),
+ 'charoff' => array (),
+ 'class' => 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 (),
+ 'class' => array (),
+ 'valign' => array ()),
+ 'title' => array(),
+ 'tr' => array(
+ 'align' => array (),
+ 'bgcolor' => array (),
+ 'char' => array (),
+ 'charoff' => array (),
+ 'class' => array (),
+ 'style' => array (),
+ 'valign' => array ()),
+ 'tt' => array(),
+ 'u' => array(),
+ 'ul' => array (
+ 'class' => array (),
+ 'style' => array (),
+ 'type' => array ()),
+ 'ol' => array (
+ 'class' => array (),
+ 'start' => array (),
+ 'style' => array (),
+ 'type' => array ()),
+ 'var' => array ());
+
+ /**
+ * Kses allowed HTML elements.
+ *
+ * @global array $allowedtags
+ * @since 1.0.0
+ */
+ $allowedtags = array(
+ 'a' => array(
+ 'href' => array (),
+ 'title' => array ()),
+ 'abbr' => array(
+ 'title' => array ()),
+ 'acronym' => array(
+ 'title' => array ()),
+ 'b' => array(),
+ 'blockquote' => array(
+ 'cite' => array ()),
+ // 'br' => array(),
+ 'cite' => array (),
+ 'code' => array(),
+ 'del' => array(
+ 'datetime' => array ()),
+ // 'dd' => array(),
+ // 'dl' => array(),
+ // 'dt' => array(),
+ 'em' => array (), 'i' => array (),
+ // 'ins' => array('datetime' => array(), 'cite' => array()),
+ // 'li' => array(),
+ // 'ol' => array(),
+ // 'p' => array(),
+ 'q' => array(
+ 'cite' => array ()),
+ 'strike' => array(),
+ 'strong' => array(),
+ // 'sub' => array(),
+ // 'sup' => array(),
+ // 'u' => array(),
+ // 'ul' => array(),
+ );
+}
+
+/**
+ * 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', and finally 'telnet. 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 ('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet')) {
+ $string = wp_kses_no_null($string);
+ $string = wp_kses_js_entities($string);
+ $string = wp_kses_normalize_entities($string);
+ $allowed_html_fixed = wp_kses_array_lc($allowed_html);
+ $string = wp_kses_hook($string, $allowed_html_fixed, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
+ return wp_kses_split($string, $allowed_html_fixed, $allowed_protocols);
+}
+
+/**
+ * You add any kses hooks here.
+ *
+ * There is currently only one kses WordPress hook and it is called here. All
+ * parameters are passed to the hooks and expected to recieve a string.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string Content to filter through kses
+ * @param array $allowed_html List of allowed HTML elements
+ * @param array $allowed_protocols Allowed protocol in links
+ * @return string Filtered content through 'pre_kses' hook
+ */
+function wp_kses_hook($string, $allowed_html, $allowed_protocols) {
+ $string = apply_filters('pre_kses', $string, $allowed_html, $allowed_protocols);
+ return $string;
+}
+
+/**
+ * This function returns kses' version number.
+ *
+ * @since 1.0.0
+ *
+ * @return string KSES Version Number
+ */
+function wp_kses_version() {
+ return '0.2.2';
+}
+
+/**
+ * Searches for HTML tags, no matter how malformed.
+ *
+ * It also matches stray ">" characters.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string Content to filter
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
+ * @return string Content with fixed HTML tags
+ */
+function wp_kses_split($string, $allowed_html, $allowed_protocols) {
+ global $pass_allowed_html, $pass_allowed_protocols;
+ $pass_allowed_html = $allowed_html;
+ $pass_allowed_protocols = $allowed_protocols;
+ return preg_replace_callback('%((<!--.*?(-->|$))|(<[^>]*(>|$)|>))%',
+ create_function('$match', 'global $pass_allowed_html, $pass_allowed_protocols; return wp_kses_split2($match[1], $pass_allowed_html, $pass_allowed_protocols);'), $string);
+}
+
+/**
+ * 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) )
+ $string = $newstring;
+ if ( $string == '' )
+ return '';
+ // prevent multiple dashes in comments
+ $string = preg_replace('/--+/', '-', $string);
+ // prevent three dashes closing a comment
+ $string = preg_replace('/-$/', '', $string);
+ return "<!--{$string}-->";
+ }
+ # Allow HTML comments
+
+ if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
+ return '';
+ # It's seriously malformed
+
+ $slash = trim($matches[1]);
+ $elem = $matches[2];
+ $attrlist = $matches[3];
+
+ if (!@isset($allowed_html[strtolower($elem)]))
+ return '';
+ # They are using a not allowed HTML element
+
+ if ($slash != '')
+ return "<$slash$elem>";
+ # No attributes are allowed for closing elements
+
+ return wp_kses_attr("$slash$elem", $attrlist, $allowed_html, $allowed_protocols);
+}
+
+/**
+ * Removes all attributes, if none are allowed for this element.
+ *
+ * If some are allowed it calls wp_kses_hair() to split them further, and then
+ * it builds up new HTML code from the data that kses_hair() returns. It also
+ * removes "<" and ">" characters, if there are any left. One more thing it does
+ * is to check if the tag has a closing XHTML slash, and if it does, it puts one
+ * in the returned code as well.
+ *
+ * @since 1.0.0
+ *
+ * @param string $element HTML element/tag
+ * @param string $attr HTML attributes from HTML element to closing HTML element tag
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
+ * @return string Sanitized HTML element
+ */
+function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
+ # Is there a closing XHTML slash at the end of the attributes?
+
+ $xhtml_slash = '';
+ if (preg_match('%\s/\s*$%', $attr))
+ $xhtml_slash = ' /';
+
+ # Are any attributes allowed at all for this element?
+
+ if (@ count($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
+
+ $attr2 = '';
+
+ foreach ($attrarr as $arreach) {
+ if (!@ isset ($allowed_html[strtolower($element)][strtolower($arreach['name'])]))
+ continue; # the attribute is not allowed
+
+ $current = $allowed_html[strtolower($element)][strtolower($arreach['name'])];
+ if ($current == '')
+ continue; # the attribute is not allowed
+
+ if (!is_array($current))
+ $attr2 .= ' '.$arreach['whole'];
+ # there are no checks
+
+ else {
+ # there are some checks
+ $ok = true;
+ foreach ($current as $currkey => $currval)
+ if (!wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval)) {
+ $ok = false;
+ break;
+ }
+
+ if ( $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, $arreach['whole']);
+ }
+
+ if ($ok)
+ $attr2 .= ' '.$arreach['whole']; # it passed them
+ } # if !is_array($current)
+ } # foreach
+
+ # Remove any "<" or ">" characters
+
+ $attr2 = preg_replace('/[<>]/', '', $attr2);
+
+ return "<$element$attr2$xhtml_slash>";
+}
+
+/**
+ * Builds an attribute list from string containing attributes.
+ *
+ * This function does a lot of work. It parses an attribute list into an array
+ * with attribute data, and tries to do the right thing even if it gets weird
+ * input. It will add quotes around attribute values that don't have any quotes
+ * or apostrophes around them, to make it easier to produce HTML code that will
+ * conform to W3C's HTML specification. It will also remove bad URL protocols
+ * from attribute values. It also reduces duplicate attributes by using the
+ * attribute defined first (foo='bar' foo='baz' will result in foo='bar').
+ *
+ * @since 1.0.0
+ *
+ * @param string $attr Attribute list from HTML element to closing HTML element tag
+ * @param array $allowed_protocols Allowed protocols to keep
+ * @return array List of attributes after parsing
+ */
+function wp_kses_hair($attr, $allowed_protocols) {
+ $attrarr = array ();
+ $mode = 0;
+ $attrname = '';
+ $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
+
+ # Loop through the whole attribute list
+
+ while (strlen($attr) != 0) {
+ $working = 0; # Was the last operation successful?
+
+ switch ($mode) {
+ case 0 : # attribute name, href for instance
+
+ if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
+ $attrname = $match[1];
+ $working = $mode = 1;
+ $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
+ }
+
+ break;
+
+ case 1 : # equals sign or valueless ("selected")
+
+ if (preg_match('/^\s*=\s*/', $attr)) # equals sign
+ {
+ $working = 1;
+ $mode = 2;
+ $attr = preg_replace('/^\s*=\s*/', '', $attr);
+ break;
+ }
+
+ if (preg_match('/^\s+/', $attr)) # valueless
+ {
+ $working = 1;
+ $mode = 0;
+ if(FALSE === array_key_exists($attrname, $attrarr)) {
+ $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+ }
+ $attr = preg_replace('/^\s+/', '', $attr);
+ }
+
+ break;
+
+ case 2 : # attribute value, a URL after href= for instance
+
+ if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match))
+ # "value"
+ {
+ $thisval = $match[1];
+ if ( in_array($attrname, $uris) )
+ $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
+
+ if(FALSE === array_key_exists($attrname, $attrarr)) {
+ $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
+ }
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
+ break;
+ }
+
+ if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match))
+ # 'value'
+ {
+ $thisval = $match[1];
+ if ( in_array($attrname, $uris) )
+ $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
+
+ if(FALSE === array_key_exists($attrname, $attrarr)) {
+ $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname='$thisval'", 'vless' => 'n');
+ }
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
+ break;
+ }
+
+ if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match))
+ # value
+ {
+ $thisval = $match[1];
+ if ( in_array($attrname, $uris) )
+ $thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
+
+ if(FALSE === array_key_exists($attrname, $attrarr)) {
+ $attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
+ }
+ # We add quotes to conform to W3C's HTML spec.
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
+ }
+
+ break;
+ } # switch
+
+ if ($working == 0) # not well formed, remove and try again
+ {
+ $attr = wp_kses_html_error($attr);
+ $mode = 0;
+ }
+ } # while
+
+ if ($mode == 1 && FALSE === array_key_exists($attrname, $attrarr))
+ # special case, for when the attribute list ends with a valueless
+ # attribute like "selected"
+ $attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
+
+ return $attrarr;
+}
+
+/**
+ * Performs different checks for attribute values.
+ *
+ * The currently implemented checks are "maxlen", "minlen", "maxval", "minval"
+ * and "valueless" with even more checks to come soon.
+ *
+ * @since 1.0.0
+ *
+ * @param string $value Attribute value
+ * @param string $vless Whether the value is valueless or not. Use 'y' or 'n'
+ * @param string $checkname What $checkvalue is checking for.
+ * @param mixed $checkvalue What constraint the value should pass
+ * @return bool Whether check passes (true) or not (false)
+ */
+function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
+ $ok = true;
+
+ switch (strtolower($checkname)) {
+ case 'maxlen' :
+ # The maxlen check makes sure that the attribute value has a length not
+ # greater than the given value. This can be used to avoid Buffer Overflows
+ # in WWW clients and various Internet servers.
+
+ if (strlen($value) > $checkvalue)
+ $ok = false;
+ break;
+
+ case 'minlen' :
+ # The minlen check makes sure that the attribute value has a length not
+ # smaller than the given value.
+
+ if (strlen($value) < $checkvalue)
+ $ok = false;
+ break;
+
+ case 'maxval' :
+ # The maxval check does two things: it checks that the attribute value is
+ # an integer from 0 and up, without an excessive amount of zeroes or
+ # whitespace (to avoid Buffer Overflows). It also checks that the attribute
+ # value is not greater than the given value.
+ # This check can be used to avoid Denial of Service attacks.
+
+ if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ $ok = false;
+ if ($value > $checkvalue)
+ $ok = false;
+ break;
+
+ case 'minval' :
+ # The minval check checks that the attribute value is a positive integer,
+ # and that it is not smaller than the given value.
+
+ if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ $ok = false;
+ if ($value < $checkvalue)
+ $ok = false;
+ break;
+
+ case 'valueless' :
+ # The valueless check checks if the attribute has a value
+ # (like <a href="blah">) or not (<option selected>). If the given value
+ # is a "y" or a "Y", the attribute must not have a value.
+ # If the given value is an "n" or an "N", the attribute must have one.
+
+ if (strtolower($checkvalue) != $vless)
+ $ok = false;
+ break;
+ } # switch
+
+ return $ok;
+}
+
+/**
+ * Sanitize string from bad protocols.
+ *
+ * This function removes all non-allowed protocols from the beginning of
+ * $string. It ignores whitespace and the case of the letters, and it does
+ * understand HTML entities. It does its work in a while loop, so it won't be
+ * fooled by a string like "javascript:javascript:alert(57)".
+ *
+ * @since 1.0.0
+ *
+ * @param string $string Content to filter bad protocols from
+ * @param array $allowed_protocols Allowed protocols to keep
+ * @return string Filtered content
+ */
+function wp_kses_bad_protocol($string, $allowed_protocols) {
+ $string = wp_kses_no_null($string);
+ $string2 = $string.'a';
+
+ while ($string != $string2) {
+ $string2 = $string;
+ $string = wp_kses_bad_protocol_once($string, $allowed_protocols);
+ } # while
+
+ return $string;
+}
+
+/**
+ * Removes any NULL characters in $string.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string
+ * @return string
+ */
+function wp_kses_no_null($string) {
+ $string = preg_replace('/\0+/', '', $string);
+ $string = preg_replace('/(\\\\0)+/', '', $string);
+
+ return $string;
+}
+
+/**
+ * Strips slashes from in front of quotes.
+ *
+ * This function changes the character sequence \" to just ". It leaves all
+ * other slashes alone. It's really weird, but the quoting from
+ * preg_replace(//e) seems to require this.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string String to strip slashes
+ * @return string Fixed strings with quoted slashes
+ */
+function wp_kses_stripslashes($string) {
+ return preg_replace('%\\\\"%', '"', $string);
+}
+
+/**
+ * Goes through an array and changes the keys to all lower case.
+ *
+ * @since 1.0.0
+ *
+ * @param array $inarray Unfiltered array
+ * @return array Fixed array with all lowercase keys
+ */
+function wp_kses_array_lc($inarray) {
+ $outarray = array ();
+
+ foreach ( (array) $inarray as $inkey => $inval) {
+ $outkey = strtolower($inkey);
+ $outarray[$outkey] = array ();
+
+ foreach ( (array) $inval as $inkey2 => $inval2) {
+ $outkey2 = strtolower($inkey2);
+ $outarray[$outkey][$outkey2] = $inval2;
+ } # foreach $inval
+ } # foreach $inarray
+
+ return $outarray;
+}
+
+/**
+ * Removes the HTML JavaScript entities found in early versions of Netscape 4.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string
+ * @return string
+ */
+function wp_kses_js_entities($string) {
+ return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
+}
+
+/**
+ * Handles parsing errors in wp_kses_hair().
+ *
+ * The general plan is to remove everything to and including some whitespace,
+ * but it deals with quotes and apostrophes as well.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string
+ * @return string
+ */
+function wp_kses_html_error($string) {
+ return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string);
+}
+
+/**
+ * Sanitizes content from bad protocols and other characters.
+ *
+ * This function searches for URL protocols at the beginning of $string, while
+ * handling whitespace and HTML entities.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string Content to check for bad protocols
+ * @param string $allowed_protocols Allowed protocols
+ * @return string Sanitized content
+ */
+function wp_kses_bad_protocol_once($string, $allowed_protocols) {
+ global $_kses_allowed_protocols;
+ $_kses_allowed_protocols = $allowed_protocols;
+
+ $string2 = preg_split('/:|:|:/i', $string, 2);
+ if ( isset($string2[1]) && !preg_match('%/\?%', $string2[0]) )
+ $string = wp_kses_bad_protocol_once2($string2[0]) . trim($string2[1]);
+ else
+ $string = preg_replace_callback('/^((&[^;]*;|[\sA-Za-z0-9])*)'.'(:|:|&#[Xx]3[Aa];)\s*/', 'wp_kses_bad_protocol_once2', $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
+ * white-list or not, and returns different data depending on the answer.
+ *
+ * @access private
+ * @since 1.0.0
+ *
+ * @param mixed $matches string or preg_replace_callback() matches array to check for bad protocols
+ * @return string Sanitized content
+ */
+function wp_kses_bad_protocol_once2($matches) {
+ global $_kses_allowed_protocols;
+
+ if ( is_array($matches) ) {
+ if ( ! isset($matches[1]) || empty($matches[1]) )
+ return '';
+
+ $string = $matches[1];
+ } else {
+ $string = $matches;
+ }
+
+ $string2 = wp_kses_decode_entities($string);
+ $string2 = preg_replace('/\s/', '', $string2);
+ $string2 = wp_kses_no_null($string2);
+ $string2 = strtolower($string2);
+
+ $allowed = false;
+ foreach ( (array) $_kses_allowed_protocols as $one_protocol)
+ if (strtolower($one_protocol) == $string2) {
+ $allowed = true;
+ break;
+ }
+
+ if ($allowed)
+ return "$string2:";
+ else
+ return '';
+}
+
+/**
+ * Converts and fixes HTML entities.
+ *
+ * This function normalizes HTML entities. It will convert "AT&T" to the correct
+ * "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string Content to normalize entities
+ * @return string Content with normalized entities
+ */
+function wp_kses_normalize_entities($string) {
+ # Disarm all entities by converting & to &
+
+ $string = str_replace('&', '&', $string);
+
+ # Change back the allowed entities in our entity whitelist
+
+ $string = preg_replace('/&([A-Za-z][A-Za-z0-9]{0,19});/', '&\\1;', $string);
+ $string = preg_replace_callback('/&#0*([0-9]{1,5});/', 'wp_kses_normalize_entities2', $string);
+ $string = preg_replace_callback('/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', 'wp_kses_normalize_entities3', $string);
+
+ return $string;
+}
+
+/**
+ * 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 ( ! isset($matches[1]) || empty($matches[1]) )
+ return '';
+
+ $i = $matches[1];
+ return ( ( ! valid_unicode($i) ) || ($i > 65535) ? "&#$i;" : "&#$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 ( ! isset($matches[2]) || empty($matches[2]) )
+ return '';
+
+ $hexchars = $matches[2];
+ return ( ( ! valid_unicode(hexdec($hexchars)) ) ? "&#x$hexchars;" : "&#x$hexchars;" );
+}
+
+/**
+ * Helper function to determine if a Unicode value is valid.
+ *
+ * @param int $i Unicode value
+ * @return bool true if the value was a valid Unicode number
+ */
+function valid_unicode($i) {
+ return ( $i == 0x9 || $i == 0xa || $i == 0xd ||
+ ($i >= 0x20 && $i <= 0xd7ff) ||
+ ($i >= 0xe000 && $i <= 0xfffd) ||
+ ($i >= 0x10000 && $i <= 0x10ffff) );
+}
+
+/**
+ * Convert all entities to their character counterparts.
+ *
+ * This function decodes numeric HTML entities (A and A). It doesn't do
+ * anything with other entities like ä, but we don't need them in the URL
+ * protocol whitelisting system anyway.
+ *
+ * @since 1.0.0
+ *
+ * @param string $string Content to change entities
+ * @return string Content after decoded entities
+ */
+function wp_kses_decode_entities($string) {
+ $string = preg_replace_callback('/&#([0-9]+);/', '_wp_kses_decode_entities_chr', $string);
+ $string = preg_replace_callback('/&#[Xx]([0-9A-Fa-f]+);/', '_wp_kses_decode_entities_chr_hexdec', $string);
+
+ return $string;
+}
+
+/**
+ * Regex callback for wp_kses_decode_entities()
+ *
+ * @param array $match preg match
+ * @return string
+ */
+function _wp_kses_decode_entities_chr( $match ) {
+ return chr( $match[1] );
+}
+
+/**
+ * Regex callback for wp_kses_decode_entities()
+ *
+ * @param array $match preg match
+ * @return string
+ */
+function _wp_kses_decode_entities_chr_hexdec( $match ) {
+ return chr( hexdec( $match[1] ) );
+}
+
+/**
+ * Sanitize content with allowed HTML Kses rules.
+ *
+ * @since 1.0.0
+ * @uses $allowedtags
+ *
+ * @param string $data Content to filter, expected to be escaped with slashes
+ * @return string Filtered content
+ */
+function wp_filter_kses($data) {
+ global $allowedtags;
+ return addslashes( wp_kses(stripslashes( $data ), $allowedtags) );
+}
+
+/**
+ * Sanitize content with allowed HTML Kses rules.
+ *
+ * @since 2.9.0
+ * @uses $allowedtags
+ *
+ * @param string $data Content to filter, expected to not be escaped
+ * @return string Filtered content
+ */
+function wp_kses_data($data) {
+ global $allowedtags;
+ return wp_kses( $data , $allowedtags );
+}
+
+/**
+ * Sanitize content for allowed HTML tags for post content.
+ *
+ * Post content refers to the page contents of the 'post' type and not $_POST
+ * data from forms.
+ *
+ * @since 2.0.0
+ * @uses $allowedposttags
+ *
+ * @param string $data Post content to filter, expected to be escaped with slashes
+ * @return string Filtered post content with allowed HTML tags and attributes intact.
+ */
+function wp_filter_post_kses($data) {
+ global $allowedposttags;
+ return addslashes ( wp_kses(stripslashes( $data ), $allowedposttags) );
+}
+
+/**
+ * Sanitize content for allowed HTML tags for post content.
+ *
+ * Post content refers to the page contents of the 'post' type and not $_POST
+ * data from forms.
+ *
+ * @since 2.9.0
+ * @uses $allowedposttags
+ *
+ * @param string $data Post content to filter
+ * @return string Filtered post content with allowed HTML tags and attributes intact.
+ */
+function wp_kses_post($data) {
+ global $allowedposttags;
+ return wp_kses( $data , $allowedposttags );
+}
+
+/**
+ * Strips all of the HTML in the content.
+ *
+ * @since 2.1.0
+ *
+ * @param string $data Content to strip all HTML from
+ * @return string Filtered content without any HTML
+ */
+function wp_filter_nohtml_kses($data) {
+ return addslashes ( wp_kses(stripslashes( $data ), array()) );
+}
+
+/**
+ * Adds all Kses input form content filters.
+ *
+ * All hooks have default priority. The wp_filter_kses() function is added to
+ * the 'pre_comment_content' and 'title_save_pre' hooks.
+ *
+ * The wp_filter_post_kses() function is added to the 'content_save_pre',
+ * 'excerpt_save_pre', and 'content_filtered_save_pre' hooks.
+ *
+ * @since 2.0.0
+ * @uses add_filter() See description for what functions are added to what hooks.
+ */
+function kses_init_filters() {
+ // Normal filtering.
+ add_filter('pre_comment_content', 'wp_filter_kses');
+ add_filter('title_save_pre', 'wp_filter_kses');
+
+ // Post filtering
+ add_filter('content_save_pre', 'wp_filter_post_kses');
+ add_filter('excerpt_save_pre', 'wp_filter_post_kses');
+ add_filter('content_filtered_save_pre', 'wp_filter_post_kses');
+}
+
+/**
+ * Removes all Kses input form content filters.
+ *
+ * A quick procedural method to removing all of the filters that kses uses for
+ * content in WordPress Loop.
+ *
+ * Does not remove the kses_init() function from 'init' hook (priority is
+ * default). Also does not remove kses_init() function from 'set_current_user'
+ * hook (priority is also default).
+ *
+ * @since 2.0.6
+ */
+function kses_remove_filters() {
+ // Normal filtering.
+ remove_filter('pre_comment_content', 'wp_filter_kses');
+ remove_filter('title_save_pre', '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');
+
+function safecss_filter_attr( $css, $deprecated = '' ) {
+ $css = wp_kses_no_null($css);
+ $css = str_replace(array("\n","\r","\t"), '', $css);
+
+ if ( preg_match( '%[\\(&]|/\*%', $css ) ) // remove any inline css containing \ ( & or comments
+ return '';
+
+ $css_array = split( ';', 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 = split( ':', $css_item );
+ if ( in_array( trim( $parts[0] ), $allowed_attr ) )
+ $found = true;
+ }
+ if ( $found ) {
+ if( $css != '' )
+ $css .= ';';
+ $css .= $css_item;
+ }
+ }
+
+ return $css;
+}