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WP_REST_Search_Controller::sanitize_subtypes( string|array $subtypes, WP_REST_Request $request, string $parameter ): string[]|WP_Error

Since
5.0.0
Source
wp-includes/rest-api/endpoints/class-wp-rest-search-controller.php:369
Sanitizes the list of subtypes, to ensure only subtypes of the passed type are included.

Compatibility

WordPress
since 5.0.0
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

$subtypesstring|array
One or more subtypes.
$requestWP_REST_Request
Full details about the request.
$parameterstring
Parameter name.

Return value

string[]|WP_Error
List of valid subtypes, or WP_Error object on failure.

Performance profile

How much work a call to WP_REST_Search_Controller::sanitize_subtypes() 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
18–36

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 41.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

  • hookthird-party callbacksdo_action()one call below WP_REST_Search_Controller::sanitize_subtypes()

Further down the call graph this can also reach option, cache, serialize, query and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 3 distinct outcomes

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

WhenInstructionsCalls it makes
always18–24wp_parse_slug_list(), rest_parse_request_arg(), is_wp_error()
!$subtypes30wp_parse_slug_list(), rest_parse_request_arg(), is_wp_error(), ->get_search_handler(), is_wp_error()
!is_wp_error() && !$subtypes36wp_parse_slug_list(), rest_parse_request_arg(), is_wp_error(), ->get_search_handler(), is_wp_error(), ->get_subtypes(), array_intersect()

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev4118–363
8.54118–363
8.44118–3633 fewer instructions than PHP 8.3
8.34418–393
8.24418–393
8.14418–393
7.44418–393

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 · 4

Source code

	public function sanitize_subtypes( $subtypes, $request, $parameter ) {		$subtypes = wp_parse_slug_list( $subtypes ); 		$subtypes = rest_parse_request_arg( $subtypes, $request, $parameter );		if ( is_wp_error( $subtypes ) ) {			return $subtypes;		} 		// 'any' overrides any other subtype.		if ( in_array( self::TYPE_ANY, $subtypes, true ) ) {			return array( self::TYPE_ANY );		} 		$handler = $this->get_search_handler( $request );		if ( is_wp_error( $handler ) ) {			return $handler;		} 		return array_intersect( $subtypes, $handler->get_subtypes() );	}

Changelog

Introduced in 5.0.0. 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

Parsed data
Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/rest-api/endpoints/class-wp-rest-search-controller.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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