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- <?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 ()),
- 'h2' => array(
- 'align' => array (),
- 'class' => array ()),
- 'h3' => array(
- 'align' => array (),
- 'class' => array ()),
- 'h4' => array(
- 'align' => array (),
- 'class' => array ()),
- 'h5' => array(
- 'align' => array (),
- 'class' => array ()),
- 'h6' => array(
- 'align' => array (),
- 'class' => 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(),
- );
- }
-
- /**
- * wp_kses() - 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);
- }
-
- /**
- * wp_kses_hook() - 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;
- }
-
- /**
- * wp_kses_version() - This function returns kses' version number.
- *
- * @since 1.0.0
- *
- * @return string Version Number
- */
- function wp_kses_version() {
- return '0.2.2';
- }
-
- /**
- * wp_kses_split() - 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, $allowed_protocols) {
- return preg_replace('%((<!--.*?(-->|$))|(<[^>]*(>|$)|>))%e',
- "wp_kses_split2('\\1', \$allowed_html, ".'$allowed_protocols)', $string);
- }
-
- /**
- * wp_kses_split2() - 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.
- *
- * @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);
- }
-
- /**
- * wp_kses_attr() - 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)) {
- $ok = false;
- break;
- }
-
- if ($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>";
- }
-
- /**
- * wp_kses_hair() - 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;
- $attrname = '';
-
- # Loop through the whole attribute list
-
- while (strlen($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"
- {
- $thisval = wp_kses_bad_protocol($match[1], $allowed_protocols);
-
- if(FALSE === array_key_exists($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'
- {
- $thisval = wp_kses_bad_protocol($match[1], $allowed_protocols);
-
- if(FALSE === array_key_exists($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
- {
- $thisval = wp_kses_bad_protocol($match[1], $allowed_protocols);
-
- if(FALSE === array_key_exists($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;
- }
-
- /**
- * wp_kses_check_attr_val() - 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;
- }
-
- /**
- * wp_kses_bad_protocol() - 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;
- }
-
- /**
- * wp_kses_no_null() - 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;
- }
-
- /**
- * wp_kses_stripslashes() - 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);
- }
-
- /**
- * wp_kses_array_lc() - 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) {
- $outkey = strtolower($inkey);
- $outarray[$outkey] = array ();
-
- foreach ($inval as $inkey2 => $inval2) {
- $outkey2 = strtolower($inkey2);
- $outarray[$outkey][$outkey2] = $inval2;
- } # foreach $inval
- } # foreach $inarray
-
- return $outarray;
- }
-
- /**
- * wp_kses_js_entities() - 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);
- }
-
- /**
- * wp_kses_html_error() - 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);
- }
-
- /**
- * wp_kses_bad_protocol_once() - 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], $allowed_protocols) . trim($string2[1]);
- else
- $string = preg_replace_callback('/^((&[^;]*;|[\sA-Za-z0-9])*)'.'(:|:|[Xx]3[Aa];)\s*/', create_function('$matches', 'global $_kses_allowed_protocols; return wp_kses_bad_protocol_once2($matches[1], $_kses_allowed_protocols);'), $string);
-
- return $string;
- }
-
- /**
- * wp_kses_bad_protocol_once2() - 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.
- *
- * @since 1.0.0
- *
- * @param string $string Content to check for bad protocols
- * @param array $allowed_protocols Allowed protocols
- * @return string Sanitized content
- */
- function wp_kses_bad_protocol_once2($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) {
- $allowed = true;
- break;
- }
-
- if ($allowed)
- return "$string2:";
- else
- return '';
- }
-
- /**
- * wp_kses_normalize_entities() - Converts and fixes HTML entities
- *
- * This function normalizes HTML entities. It will convert "AT&T" to the
- * correct "AT&T", ":" to ":", "YZZY;" 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);
- $string = preg_replace_callback('/�*([0-9]{1,5});/', create_function('$matches', 'return wp_kses_normalize_entities2($matches[1]);'), $string);
- $string = preg_replace('/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', '\\1\\2;', $string);
-
- return $string;
- }
-
- /**
- * wp_kses_normalize_entities2() - 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.
- *
- * @since 1.0.0
- *
- * @param int $i Number encoded entity
- * @return string Correctly encoded entity
- */
- function wp_kses_normalize_entities2($i) {
- return (($i > 65535) ? "&#$i;" : "$i;");
- }
-
- /**
- * wp_kses_decode_entities() - 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('/([0-9]+);/e', 'chr("\\1")', $string);
- $string = preg_replace('/[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', $string);
-
- return $string;
- }
-
- /**
- * wp_filter_kses() - 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) );
- }
-
- /**
- * wp_filter_post_kses() - 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) );
- }
-
- /**
- * wp_filter_nohtml_kses() - 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()) );
- }
-
- /**
- * kses_init_filters() - Adds all Kses input form content filters
- *
- * All hooks have default priority. The wp_filter_kses() fucntion
- * 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');
- }
-
- /**
- * kses_remove_filters() - 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');
- }
-
- /**
- * kses_init() - 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');
- ?>
-