Question

doing_filter( null|string $filter = null )

Retrieve the name of a filter currently being processed.

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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.

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参数

$filter

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

Default value: null

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返回值

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

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源代码

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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更新日志

Version	description
3.9.0	Introduced.

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相关函数

Used By

• wp-includes/plugin.php: doing_action()

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User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note Contributed by Codex

   To check if any filter is being applied you could write something like this:

   
   if (doing_filter() ) {
   	// Do Something Here
   }