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.
(string) (Required) HTML element/tag.
(string) (Required) HTML attributes from HTML element to closing HTML element tag.
(array[]|string) (Required) An array of allowed HTML elements and attributes, or a context name such as 'post'. See wp_kses_allowed_html() for the list of accepted context names.
(string[]) (Required) Array of allowed URL protocols.
(string) Sanitized HTML element.
File: wp-includes/kses.php
function wp_kses_attr( $element, $attr, $allowed_html, $allowed_protocols ) {
if ( ! is_array( $allowed_html ) ) {
$allowed_html = wp_kses_allowed_html( $allowed_html );
}
// Is there a closing XHTML slash at the end of the attributes?
$xhtml_slash = '';
if ( preg_match( '%\s*/\s*$%', $attr ) ) {
$xhtml_slash = ' /';
}
// Are any attributes allowed at all for this element?
$element_low = strtolower( $element );
if ( empty( $allowed_html[ $element_low ] ) || true === $allowed_html[ $element_low ] ) {
return "<$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 ( wp_kses_attr_check( $arreach['name'], $arreach['value'], $arreach['whole'], $arreach['vless'], $element, $allowed_html ) ) {
$attr2 .= ' ' . $arreach['whole'];
}
}
// Remove any "<" or ">" characters.
$attr2 = preg_replace( '/[<>]/', '', $attr2 );
return "<$element$attr2$xhtml_slash>";
} | Version | Description |
|---|---|
| 1.0.0 | Introduced. |
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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_kses_attr