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phpdoc for kses from darkdragon. fixes #5641 

git-svn-id: http://svn.automattic.com/wordpress/trunk@6630 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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ryan 2008-01-16 19:15:07 +00:00
parent f8ab885ab0
commit 0aee557b68
1 changed files with 393 additions and 163 deletions
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556
wp-includes/kses.php
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@ -1,23 +1,46 @@
<?php <?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!]
*/
// Added wp_ prefix to avoid conflicts with existing kses users /**
# kses 0.2.2 - HTML/XHTML filter that only allows some elements and attributes * You can override this in your my-hacks.php file
# Copyright (C) 2002, 2003, 2005 Ulf Harnhammar * You can also override this in a plugin file. The
# *** CONTACT INFORMATION *** * my-hacks.php is deprecated in its usage.
# *
# E-mail: metaur at users dot sourceforge dot net * @since 1.2.0
# Web page: http://sourceforge.net/projects/kses */
# Paper mail: Ulf Harnhammar
# Ymergatan 17 C
# 753 25 Uppsala
# SWEDEN
#
# [kses strips evil scripts!]
if (!defined('CUSTOM_TAGS')) if (!defined('CUSTOM_TAGS'))
define('CUSTOM_TAGS', false); define('CUSTOM_TAGS', false);
// You can override this in your my-hacks.php file
if (!CUSTOM_TAGS) { 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( $allowedposttags = array(
'address' => array(), 'address' => array(),
'a' => array( 'a' => array(
@ -251,6 +274,12 @@ if (!CUSTOM_TAGS) {
'ol' => array ( 'ol' => array (
'class' => array ()), 'class' => array ()),
'var' => array ()); 'var' => array ());
/**
* Kses allowed HTML elements
*
* @global array $allowedtags
* @since 1.0.0
*/
$allowedtags = array( $allowedtags = array(
'a' => array( 'a' => array(
'href' => array (), 'href' => array (),
@ -286,57 +315,103 @@ if (!CUSTOM_TAGS) {
); );
} }
function wp_kses($string, $allowed_html, $allowed_protocols = array ('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet')) /**
############################################################################### * 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 * This function makes sure that only the allowed HTML element names,
# $string. You have to remove any slashes from PHP's magic quotes before you * attribute names and attribute values plus only sane HTML entities
# call this function. * 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); $string = wp_kses_no_null($string);
$string = wp_kses_js_entities($string); $string = wp_kses_js_entities($string);
$string = wp_kses_normalize_entities($string); $string = wp_kses_normalize_entities($string);
$allowed_html_fixed = wp_kses_array_lc($allowed_html); $allowed_html_fixed = wp_kses_array_lc($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 $string = wp_kses_hook($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, $allowed_protocols); return wp_kses_split($string, $allowed_html_fixed, $allowed_protocols);
} # function wp_kses }
function wp_kses_hook($string, $allowed_html, $allowed_protocols) /**
############################################################################### * wp_kses_hook() - You add any kses hooks here.
# You add any kses hooks here. *
############################################################################### * There is currently only one kses WordPress hook and it is
{ * called here. All parameters are passed to the hooks and
* expected to 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); $string = apply_filters('pre_kses', $string, $allowed_html, $allowed_protocols);
return $string; return $string;
} # function wp_kses_hook }
function wp_kses_version() /**
############################################################################### * wp_kses_version() - This function returns kses' version number.
# This function returns kses' version number. *
############################################################################### * @since 1.0.0
{ *
* @return string Version Number
*/
function wp_kses_version() {
return '0.2.2'; return '0.2.2';
} # function wp_kses_version }
function wp_kses_split($string, $allowed_html, $allowed_protocols) /**
############################################################################### * wp_kses_split() - Searches for HTML tags, no matter how malformed
# This function searches for HTML tags, no matter how malformed. It also *
# matches stray ">" characters. * 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, $allowed_protocols) {
return preg_replace('%((<!--.*?(-->|$))|(<[^>]*(>|$)|>))%e', return preg_replace('%((<!--.*?(-->|$))|(<[^>]*(>|$)|>))%e',
"wp_kses_split2('\\1', \$allowed_html, ".'$allowed_protocols)', $string); "wp_kses_split2('\\1', \$allowed_html, ".'$allowed_protocols)', $string);
} # function wp_kses_split }
function wp_kses_split2($string, $allowed_html, $allowed_protocols) /**
############################################################################### * 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 * This function does a lot of work. It rejects some very malformed things
# ma, no strip_tags()!). Otherwise it splits the tag into an element and an * like <:::>. It returns an empty string, if the element isn't allowed (look
# attribute list. * 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); $string = wp_kses_stripslashes($string);
if (substr($string, 0, 1) != '<') if (substr($string, 0, 1) != '<')
@ -370,18 +445,26 @@ function wp_kses_split2($string, $allowed_html, $allowed_protocols)
# No attributes are allowed for closing elements # No attributes are allowed for closing elements
return wp_kses_attr("$slash$elem", $attrlist, $allowed_html, $allowed_protocols); return wp_kses_attr("$slash$elem", $attrlist, $allowed_html, $allowed_protocols);
} # function wp_kses_split2 }
function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) /**
############################################################################### * wp_kses_attr() - Removes all attributes, if none are allowed for this element
# This function removes all attributes, if none are allowed for this element. *
# If some are allowed it calls wp_kses_hair() to split them further, and then it * If some are allowed it calls wp_kses_hair() to split them further, and then
# builds up new HTML code from the data that kses_hair() returns. It also * 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 * 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, * does is to check if the tag has a closing XHTML slash, and if it does, it
# it puts one in the returned code as well. * 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? # Is there a closing XHTML slash at the end of the attributes?
$xhtml_slash = ''; $xhtml_slash = '';
@ -433,18 +516,25 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols)
$attr2 = preg_replace('/[<>]/', '', $attr2); $attr2 = preg_replace('/[<>]/', '', $attr2);
return "<$element$attr2$xhtml_slash>"; return "<$element$attr2$xhtml_slash>";
} # function wp_kses_attr }
function wp_kses_hair($attr, $allowed_protocols) /**
############################################################################### * 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 * This function does a lot of work. It parses an attribute list into an array
# input. It will add quotes around attribute values that don't have any quotes * with attribute data, and tries to do the right thing even if it gets weird
# or apostrophes around them, to make it easier to produce HTML code that will * input. It will add quotes around attribute values that don't have any quotes
# conform to W3C's HTML specification. It will also remove bad URL protocols * or apostrophes around them, to make it easier to produce HTML code that will
# from attribute values. * conform to W3C's HTML specification. It will also remove bad URL protocols
############################################################################### * from attribute values.
{ *
* @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 (); $attrarr = array ();
$mode = 0; $mode = 0;
$attrname = ''; $attrname = '';
@ -527,7 +617,7 @@ function wp_kses_hair($attr, $allowed_protocols)
} # switch } # switch
if ($working == 0) # not well formed, remove and try again if ($working == 0) # not well formed, remove and try again
{ {
$attr = wp_kses_html_error($attr); $attr = wp_kses_html_error($attr);
$mode = 0; $mode = 0;
} }
@ -539,15 +629,23 @@ function wp_kses_hair($attr, $allowed_protocols)
$attrarr[] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y'); $attrarr[] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
return $attrarr; return $attrarr;
} # function wp_kses_hair }
function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) /**
############################################################################### * wp_kses_check_attr_val() - Performs different checks for attribute values.
# This function performs different checks for attribute values. The currently *
# implemented checks are "maxlen", "minlen", "maxval", "minval" and "valueless" * The currently implemented checks are "maxlen", "minlen", "maxval", "minval"
# with even more checks to come soon. * 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; $ok = true;
switch (strtolower($checkname)) { switch (strtolower($checkname)) {
@ -603,16 +701,23 @@ function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue)
} # switch } # switch
return $ok; return $ok;
} # function wp_kses_check_attr_val }
function wp_kses_bad_protocol($string, $allowed_protocols) /**
############################################################################### * 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 * This function removes all non-allowed protocols from the beginning
# understand HTML entities. It does its work in a while loop, so it won't be * of $string. It ignores whitespace and the case of the letters, and
# fooled by a string like "javascript:javascript:alert(57)". * 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); $string = wp_kses_no_null($string);
$string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature" $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
$string2 = $string.'a'; $string2 = $string.'a';
@ -623,34 +728,48 @@ function wp_kses_bad_protocol($string, $allowed_protocols)
} # while } # while
return $string; return $string;
} # function wp_kses_bad_protocol }
function wp_kses_no_null($string) /**
############################################################################### * wp_kses_no_null() - Removes any NULL characters in $string.
# This function 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);
$string = preg_replace('/(\\\\0)+/', '', $string); $string = preg_replace('/(\\\\0)+/', '', $string);
return $string; return $string;
} # function wp_kses_no_null }
function wp_kses_stripslashes($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 * This function changes the character sequence \" to just "
# preg_replace(//e) seems to require this. * 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); return preg_replace('%\\\\"%', '"', $string);
} # function wp_kses_stripslashes }
function wp_kses_array_lc($inarray) /**
############################################################################### * wp_kses_array_lc() - Goes through an array and changes the keys to all lower case.
# This function 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 (); $outarray = array ();
foreach ($inarray as $inkey => $inval) { foreach ($inarray as $inkey => $inval) {
@ -664,42 +783,64 @@ function wp_kses_array_lc($inarray)
} # foreach $inarray } # foreach $inarray
return $outarray; return $outarray;
} # function wp_kses_array_lc }
function wp_kses_js_entities($string) /**
############################################################################### * wp_kses_js_entities() - Removes the HTML JavaScript entities found in early versions of Netscape 4.
# This function 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*;?|$)%', '', $string); return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
} # function wp_kses_js_entities }
function wp_kses_html_error($string) /**
############################################################################### * wp_kses_html_error() - Handles parsing errors in wp_kses_hair()
# This function deals with parsing errors in wp_kses_hair(). The general plan is *
# to remove everything to and including some whitespace, but it deals with * The general plan is to remove everything to and including some
# quotes and apostrophes as well. * 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*/', '', $string); return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string);
} # function wp_kses_html_error }
function wp_kses_bad_protocol_once($string, $allowed_protocols) /**
############################################################################### * 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. * 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) {
return preg_replace('/^((&[^;]*;|[\sA-Za-z0-9])*)'.'(:|&#58;|&#[Xx]3[Aa];)\s*/e', 'wp_kses_bad_protocol_once2("\\1", $allowed_protocols)', $string); return preg_replace('/^((&[^;]*;|[\sA-Za-z0-9])*)'.'(:|&#58;|&#[Xx]3[Aa];)\s*/e', 'wp_kses_bad_protocol_once2("\\1", $allowed_protocols)', $string);
} # function wp_kses_bad_protocol_once }
function wp_kses_bad_protocol_once2($string, $allowed_protocols) /**
############################################################################### * 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. * 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); $string2 = wp_kses_decode_entities($string);
$string2 = preg_replace('/\s/', '', $string2); $string2 = preg_replace('/\s/', '', $string2);
$string2 = wp_kses_no_null($string2); $string2 = wp_kses_no_null($string2);
@ -718,14 +859,21 @@ function wp_kses_bad_protocol_once2($string, $allowed_protocols)
return "$string2:"; return "$string2:";
else else
return ''; return '';
} # function wp_kses_bad_protocol_once2 }
function wp_kses_normalize_entities($string) /**
############################################################################### * wp_kses_normalize_entities() - Converts and fixes HTML entities
# This function normalizes HTML entities. It will convert "AT&T" to the correct *
# "AT&amp;T", "&#00058;" to "&#58;", "&#XYZZY;" to "&amp;#XYZZY;" and so on. * This function normalizes HTML entities. It will convert "AT&T" to the
############################################################################### * correct "AT&amp;T", "&#00058;" to "&#58;", "&#XYZZY;" to "&amp;#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 &amp; # Disarm all entities by converting & to &amp;
$string = str_replace('&', '&amp;', $string); $string = str_replace('&', '&amp;', $string);
@ -737,44 +885,97 @@ function wp_kses_normalize_entities($string)
$string = preg_replace('/&amp;#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', '&#\\1\\2;', $string); $string = preg_replace('/&amp;#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', '&#\\1\\2;', $string);
return $string; return $string;
} # function wp_kses_normalize_entities }
function wp_kses_normalize_entities2($i) /**
############################################################################### * 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. * 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 (($i > 65535) ? "&amp;#$i;" : "&#$i;"); return (($i > 65535) ? "&amp;#$i;" : "&#$i;");
} # function wp_kses_normalize_entities2 }
function wp_kses_decode_entities($string) /**
############################################################################### * wp_kses_decode_entities() - Convert all entities to their character counterparts.
# This function decodes numeric HTML entities (&#65; and &#x41;). It doesn't *
# do anything with other entities like &auml;, but we don't need them in the * This function decodes numeric HTML entities (&#65; and &#x41;). It
# URL protocol whitelisting system anyway. * doesn't do anything with other entities like &auml;, 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('/&#([0-9]+);/e', 'chr("\\1")', $string);
$string = preg_replace('/&#[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', $string); $string = preg_replace('/&#[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', $string);
return $string; return $string;
} # function wp_kses_decode_entities }
/**
* 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) { function wp_filter_kses($data) {
global $allowedtags; global $allowedtags;
return addslashes( wp_kses(stripslashes( $data ), $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) { function wp_filter_post_kses($data) {
global $allowedposttags; global $allowedposttags;
return addslashes ( wp_kses(stripslashes( $data ), $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) { function wp_filter_nohtml_kses($data) {
return addslashes ( wp_kses(stripslashes( $data ), array()) ); 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() { function kses_init_filters() {
// Normal filtering. // Normal filtering.
add_filter('pre_comment_content', 'wp_filter_kses'); add_filter('pre_comment_content', 'wp_filter_kses');
@ -786,6 +987,19 @@ function kses_init_filters() {
add_filter('content_filtered_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() { function kses_remove_filters() {
// Normal filtering. // Normal filtering.
remove_filter('pre_comment_content', 'wp_filter_kses'); remove_filter('pre_comment_content', 'wp_filter_kses');
@ -797,6 +1011,22 @@ function kses_remove_filters() {
remove_filter('content_filtered_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() { function kses_init() {
kses_remove_filters(); kses_remove_filters();
@ -806,4 +1036,4 @@ function kses_init() {
add_action('init', 'kses_init'); add_action('init', 'kses_init');
add_action('set_current_user', 'kses_init'); add_action('set_current_user', 'kses_init');
?> ?>