Title: WP_REST_Meta_Fields::default_additional_properties_to_false
Published: November 12, 2019
Last modified: May 20, 2026

---

# WP_REST_Meta_Fields::default_additional_properties_to_false( array $schema ): array

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#description)
 * [Parameters](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#wp--skip-link--target)

This method has been deprecated since 5.6.0. Use rest_default_additional_properties_to_false()
instead.

Recursively add additionalProperties = false to all objects in a schema if no additionalProperties
setting is specified.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#description)󠁿

This is needed to restrict properties of objects in meta values to only registered
items, as the REST API will allow additional properties by default.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#parameters)󠁿

 `$schema`arrayrequired

The schema array.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#return)󠁿

 array

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#source)󠁿

    ```php
    protected function default_additional_properties_to_false( $schema ) {
    	_deprecated_function( __METHOD__, '5.6.0', 'rest_default_additional_properties_to_false()' );

    	return rest_default_additional_properties_to_false( $schema );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php#L606)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php#L606-L610)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#related)󠁿

| Uses | Description | 
| [rest_default_additional_properties_to_false()](https://developer.wordpress.org/reference/functions/rest_default_additional_properties_to_false/)`wp-includes/rest-api.php` |

Sets the “additionalProperties” to false by default for all object definitions in the schema.

  | 
| [_deprecated_function()](https://developer.wordpress.org/reference/functions/_deprecated_function/)`wp-includes/functions.php` |

Marks a function as deprecated and inform when it has been used.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/default_additional_properties_to_false/?output_format=md#changelog)󠁿

| Version | Description | 
| [5.6.0](https://developer.wordpress.org/reference/since/5.6.0/) | Deprecated. Use [rest_default_additional_properties_to_false()](https://developer.wordpress.org/reference/functions/rest_default_additional_properties_to_false/) instead. | 
| [5.3.0](https://developer.wordpress.org/reference/since/5.3.0/) | Introduced. |

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