Title: WP_REST_Revisions_Controller::__construct
Published: December 6, 2016
Last modified: February 24, 2026

---

# WP_REST_Revisions_Controller::__construct( string $parent_post_type )

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wp_rest_revisions_controller/__construct/?output_format=md#parameters)
 * [Source](https://developer.wordpress.org/reference/classes/wp_rest_revisions_controller/__construct/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_rest_revisions_controller/__construct/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_rest_revisions_controller/__construct/?output_format=md#changelog)

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

Constructor.

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

 `$parent_post_type`stringrequired

Post type of the parent.

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

    ```php
    public function __construct( $parent_post_type ) {
    	$this->parent_post_type = $parent_post_type;
    	$post_type_object       = get_post_type_object( $parent_post_type );
    	$parent_controller      = $post_type_object->get_rest_controller();

    	if ( ! $parent_controller ) {
    		$parent_controller = new WP_REST_Posts_Controller( $parent_post_type );
    	}

    	$this->parent_controller = $parent_controller;
    	$this->rest_base         = 'revisions';
    	$this->parent_base       = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
    	$this->namespace         = ! empty( $post_type_object->rest_namespace ) ? $post_type_object->rest_namespace : 'wp/v2';
    	$this->meta              = new WP_REST_Post_Meta_Fields( $parent_post_type );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php#L58)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php#L58-L72)

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

| Uses | Description | 
| [WP_REST_Post_Meta_Fields::__construct()](https://developer.wordpress.org/reference/classes/wp_rest_post_meta_fields/__construct/)`wp-includes/rest-api/fields/class-wp-rest-post-meta-fields.php` |

Constructor.

  | 
| [WP_REST_Posts_Controller::__construct()](https://developer.wordpress.org/reference/classes/wp_rest_posts_controller/__construct/)`wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php` |

Constructor.

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

Retrieves a post type object by name.

  |

[Show 1 more](https://developer.wordpress.org/reference/classes/wp_rest_revisions_controller/__construct/?output_format=md#)
[Show less](https://developer.wordpress.org/reference/classes/wp_rest_revisions_controller/__construct/?output_format=md#)

| Used by | Description | 
| [WP_REST_Template_Autosaves_Controller::__construct()](https://developer.wordpress.org/reference/classes/wp_rest_template_autosaves_controller/__construct/)`wp-includes/rest-api/endpoints/class-wp-rest-template-autosaves-controller.php` |

Constructor.

  | 
| [WP_REST_Template_Revisions_Controller::__construct()](https://developer.wordpress.org/reference/classes/wp_rest_template_revisions_controller/__construct/)`wp-includes/rest-api/endpoints/class-wp-rest-template-revisions-controller.php` |

Constructor.

  | 
| [WP_REST_Global_Styles_Revisions_Controller::__construct()](https://developer.wordpress.org/reference/classes/wp_rest_global_styles_revisions_controller/__construct/)`wp-includes/rest-api/endpoints/class-wp-rest-global-styles-revisions-controller.php` |

Constructor.

  | 
| [WP_REST_Autosaves_Controller::__construct()](https://developer.wordpress.org/reference/classes/wp_rest_autosaves_controller/__construct/)`wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php` |

Constructor.

  |

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

| Version | Description | 
| [4.7.0](https://developer.wordpress.org/reference/since/4.7.0/) | Introduced. |

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