Title: _wp_post_revision_data
Published: April 12, 2016
Last modified: May 20, 2026

---

# _wp_post_revision_data( array|WP_Post $post = array(), bool $autosave = false ): array

## In this article

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

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

This function’s access is marked private. This means it is not intended for use 
by plugin or theme developers, only by core. It is listed here for completeness.

Returns a post array ready to be inserted into the posts table as a post revision.

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

 `$post`array|[WP_Post](https://developer.wordpress.org/reference/classes/wp_post/)
optional

A post array or a [WP_Post](https://developer.wordpress.org/reference/classes/wp_post/)
object to be processed for insertion as a post revision.

Default:`array()`

`$autosave`booloptional

Is the revision an autosave?

Default:`false`

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

 array Post array ready to be inserted as a post revision.

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

    ```php
    function _wp_post_revision_data( $post = array(), $autosave = false ) {
    	if ( ! is_array( $post ) ) {
    		$post = get_post( $post, ARRAY_A );
    	}

    	$fields = _wp_post_revision_fields( $post );

    	$revision_data = array();

    	foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field ) {
    		$revision_data[ $field ] = $post[ $field ];
    	}

    	$revision_data['post_parent']   = $post['ID'];
    	$revision_data['post_status']   = 'inherit';
    	$revision_data['post_type']     = 'revision';
    	$revision_data['post_name']     = $autosave ? "$post[ID]-autosave-v1" : "$post[ID]-revision-v1"; // "1" is the revisioning system version.
    	$revision_data['post_date']     = $post['post_modified'] ?? '';
    	$revision_data['post_date_gmt'] = $post['post_modified_gmt'] ?? '';

    	return $revision_data;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/revision.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/revision.php#L75)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/revision.php#L75-L96)

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

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

Determines which fields of posts are to be saved in revisions.

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

Retrieves post data given a post ID or post object.

  |

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

Creates autosave for the specified post.

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

Creates autosave data for the specified post from `$_POST` data.

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

Inserts post data into the posts table as a post revision.

  |

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

| Version | Description | 
| [4.5.0](https://developer.wordpress.org/reference/since/4.5.0/) | Introduced. |

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