doing_filter( null|string $filter = null )
Retrieve the name of a filter currently being processed.
Contents
Description 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 (despite not being the most recent filter to fire, in the case of hooks called from hook callbacks) to be verified.
See also See also
Parameters Parameters
- $filter
-
(null|string) (Optional) Filter to check. Defaults to null, which checks if any filter is currently being run.
Default value: null
Return Return
(bool) Whether the filter is currently in the stack.
Source Source
File: wp-includes/plugin.php
function doing_filter( $filter = null ) {
global $wp_current_filter;
if ( null === $filter ) {
return ! empty( $wp_current_filter );
}
return in_array( $filter, $wp_current_filter );
}
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Changelog Changelog
| Version | Description |
|---|---|
| 3.9.0 | Introduced. |
User Contributed Notes User Contributed Notes
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(From Codex)
To check whether the ‘posts_results’ filter is being applied you could write something similar to this:
if ( doing_filter( 'posts_results' ) ) { //Do Something Here }To check if any filter is being applied you could write something like this:
if (doing_filter() ) { // Do Something Here }