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remove_all_filters( string $hook_name, int|false $priority = false ): true

Since
2.7.0
Source
wp-includes/plugin.php:341
Removes all of the callback functions from a filter hook.

Compatibility

WordPress
since 2.7.0
PHP
7.4–8.6-dev
  • 6.7.7
  • 6.8.8
  • 6.9.7
  • 7.0.4
  • 7.1.0

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$hook_namestring
The filter to remove callbacks from.
$priorityint|falseoptional
The priority number to remove them from.
Default false.Default: false

Return value

true
Always returns true.

Performance profile

How much work a call to remove_all_filters() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class
Trivial

Touches nothing outside its own arguments.

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
6–15

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 15.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
3

3 places in core call this, so the cost is paid more often than your own code shows.

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost remove_all_filters() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
!isset($wp_filter[$hook_name])6none
isset($wp_filter[$hook_name])14–15->remove_all_filters(), ->has_filters()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 15 instructions, 6–15 executed per call, 2 branches. The work does not change between versions.

An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.

Used by · 3

Source code

View on Trac View on GitHub 

function remove_all_filters( $hook_name, $priority = false ) {	global $wp_filter; 	if ( isset( $wp_filter[ $hook_name ] ) ) {		$wp_filter[ $hook_name ]->remove_all_filters( $priority ); 		if ( ! $wp_filter[ $hook_name ]->has_filters() ) {			unset( $wp_filter[ $hook_name ] );		}	} 	return true;}

Changelog

Introduced in 2.7.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

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Generated from the wordpress-develop 6.8.8 tag, from src/wp-includes/plugin.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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