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WordPress

remove_theme_support( string $feature ): bool|void

Since
3.0.0
Source
wp-includes/theme.php:3069
Allows a theme to de-register its support of a certain feature

Description

Should be called in the theme's functions.php file. Generally would be used for child themes to override support from the parent theme.

Compatibility

WordPress
since 3.0.0
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

$featurestring
The feature being removed. See add_theme_support() for the list of possible values.

Return value

bool|void
Whether feature was removed.

Performance profile

How much work a call to remove_theme_support() 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
4–7

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 8.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
2

2 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_theme_support() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
$feature4none
!$feature7_remove_theme_support()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 8 instructions, 4–7 executed per call, 1 branch. 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.

Uses · 1

  • _remove_theme_support()Do not use. Removes theme support internally without knowledge of those not used by themes directly.

Used by · 2

Source code

View on Trac View on GitHub 

function remove_theme_support( $feature ) {	// Do not remove internal registrations that are not used directly by themes.	if ( in_array( $feature, array( 'editor-style', 'widgets', 'menus' ), true ) ) {		return false;	} 	return _remove_theme_support( $feature );}

Changelog

Introduced in 3.0.0. One change between 6.7.7 and 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.

7.1.0
Return type changed from bool|void to bool.verified against source
3.0.0
Introduced.from the docblock

About this page

Parsed data
Generated from the wordpress-develop 6.7.7 tag, from src/wp-includes/theme.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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