wp_pre_kses_block_attributes( string $string, array[]|string $allowed_html, string[] $allowed_protocols )

Remove non-allowable HTML from parsed block attribute values when filtering in the post context.

Parameters

$string

(string) (Required) Content to be run through KSES.

$allowed_html

(array[]|string) (Required) An array of allowed HTML elements and attributes, or a context name such as 'post'.

$allowed_protocols

(string[]) (Required) Array of allowed URL protocols.

Return

(string) Filtered text to run through KSES.

Source

File: wp-includes/formatting.php 

function wp_pre_kses_block_attributes( $string, $allowed_html, $allowed_protocols ) {
	/*
	 * `filter_block_content` is expected to call `wp_kses`. Temporarily remove
	 * the filter to avoid recursion.
	 */
	remove_filter( 'pre_kses', 'wp_pre_kses_block_attributes', 10 );
	$string = filter_block_content( $string, $allowed_html, $allowed_protocols );
	add_filter( 'pre_kses', 'wp_pre_kses_block_attributes', 10, 3 );

	return $string;
}

Uses

Uses Description
wp-includes/blocks.php: filter_block_content()

Filters and sanitizes block content to remove non-allowable HTML from parsed block attribute values.
wp-includes/plugin.php: remove_filter()

Removes a callback function from a filter hook.
wp-includes/plugin.php: add_filter()

Adds a callback function to a filter hook.

Changelog

Version Description
5.3.1 Introduced.

© 2003–2021 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_pre_kses_block_attributes