doing_filter( null|string $hook_name = null )

Returns whether or not a filter hook is currently being processed.

Description

The function current_filter() only returns the most recent filter or action being executed. did_action() returns true once the action is initially processed.

This function allows detection for any filter currently being executed (regardless of whether it’s the most recent filter to fire, in the case of hooks called from hook callbacks) to be verified.

See also

Parameters

$hook_name

(null|string) (Optional) Filter hook to check. Defaults to null, which checks if any filter is currently being run.

Default value: null

Return

(bool) Whether the filter is currently in the stack.

Source

File: wp-includes/plugin.php 

function doing_filter( $hook_name = null ) {
	global $wp_current_filter;

	if ( null === $hook_name ) {
		return ! empty( $wp_current_filter );
	}

	return in_array( $hook_name, $wp_current_filter, true );
}

Used By

Used By Description
wp-includes/blocks.php: do_blocks()

Parses dynamic blocks out of post_content and re-renders them.
wp-includes/plugin.php: doing_action()

Returns whether or not an action hook is currently being processed.

Changelog

Version Description
3.9.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/doing_filter