Title: wp_get_revision_ui_diff
Published: December 18, 2014
Last modified: February 24, 2026

---

# apply_filters( ‘wp_get_revision_ui_diff’, array[] $return, WP_Post $compare_from, WP_Post $compare_to )

## In this article

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

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

Filters the fields displayed in the post revision diff UI.

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

 `$return`array[]

Array of revision UI fields. Each item is an array of id, name, and diff.

`$compare_from`[WP_Post](https://developer.wordpress.org/reference/classes/wp_post/)

The revision post to compare from.

`$compare_to`[WP_Post](https://developer.wordpress.org/reference/classes/wp_post/)

The revision post to compare to.

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

    ```php
    return apply_filters( 'wp_get_revision_ui_diff', $return, $compare_from, $compare_to );
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-admin/includes/revision.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-admin/includes/revision.php#L163)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/revision.php#L163-L163)

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

| Used by | Description | 
| [wp_get_revision_ui_diff()](https://developer.wordpress.org/reference/functions/wp_get_revision_ui_diff/)`wp-admin/includes/revision.php` |

Get the revision UI diff.

  |

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

| Version | Description | 
| [4.1.0](https://developer.wordpress.org/reference/since/4.1.0/) | Introduced. |

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