wp_kses( string $string, array[]|string $allowed_html, string[] $allowed_protocols = array() )
Filters text content and strips out disallowed HTML.
Contents
Description Description
This function makes sure that only the allowed HTML element names, attribute names, attribute values, and HTML entities will occur in the given text string.
This function expects unslashed data.
See also See also
- wp_kses_post(): for specifically filtering post content and fields.
- wp_allowed_protocols(): for the default allowed protocols in link URLs.
Parameters Parameters
- $string
-
(string) (Required) Text content to filter.
- $allowed_html
-
(array[]|string) (Required) An array of allowed HTML elements and attributes, or a context name such as 'post'.
- $allowed_protocols
-
(string[]) (Optional) Array of allowed URL protocols.
Default value: array()
Return Return
(string) Filtered content containing only the allowed HTML.
More Information More Information
KSES is a recursive acronym which stands for “KSES Strips Evil Scripts”.
For parameter $allowed_protocols, the default allowed protocols are http, https, ftp, mailto, news, irc, gopher, nntp, feed, and telnet. This covers all common link protocols, except for javascript, which should not be allowed for untrusted users.
Source Source
File: wp-includes/kses.php
function wp_kses( $string, $allowed_html, $allowed_protocols = array() ) {
if ( empty( $allowed_protocols ) ) {
$allowed_protocols = wp_allowed_protocols();
}
$string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
$string = wp_kses_normalize_entities( $string );
$string = wp_kses_hook( $string, $allowed_html, $allowed_protocols );
return wp_kses_split( $string, $allowed_html, $allowed_protocols );
}
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Changelog Changelog
| Version | Description |
|---|---|
| 1.0.0 | Introduced. |
User Contributed Notes User Contributed Notes
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Many function names in WordPress are self-explanatory and if they aren’t, their documentation usually sheds some light on how they got their name. I find this makes it easier to later recall their names and uses. However,
wp_ksesis an exception. So for anyone else wondering:ksescomes from the terms XSS (cross-site scripting) and access. It’s also a recursive acronym (every open-source project should have one!) for “kses strips evil scripts”.Allowed HTML tags array
This is an example of how to format an array of allowed HTML tags and attributes.
array( 'a' => array( 'href' => array(), 'title' => array() ), 'br' => array(), 'em' => array(), 'strong' => array(), );See
wp_kses_allowed_html()and /wp-includes/kses.php to get a list of the possible default values of the allowed HTML tags.