Summery Summery

Custom sanitize callback used for all options to allow the use of ‘null’.

Syntax Syntax

WP_REST_Settings_Controller::sanitize_callback( mixed $value, WP_REST_Request $request, string $param )

Description Description

By default, the schema of settings will throw an error if a value is set to null as it’s not a valid value for something like "type => string". We provide a wrapper sanitizer to whitelist the use of null.

Parameters Parameters


(Required) The value for the setting.


(Required) The request object.


(Required) The parameter name.

Return Return


Source Source

File: wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php

	public function sanitize_callback( $value, $request, $param ) {
		if ( is_null( $value ) ) {
			return $value;

		return rest_parse_request_arg( $value, $request, $param );


Changelog Changelog

Version Description
4.7.0 Introduced.


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