Title: WP_Object_Cache::flush_group
Published: November 2, 2022
Last modified: April 28, 2025

---

# WP_Object_Cache::flush_group( string $group ): true

## In this article

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

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

Removes all cache items in a group.

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

 `$group`stringrequired

Name of group to remove from cache.

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

 true Always returns true.

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

    ```php
    public function flush_group( $group ) {
    	unset( $this->cache[ $group ] );

    	return true;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-object-cache.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-object-cache.php#L572)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-object-cache.php#L572-L576)

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

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

Removes all cache items in a group, if the object cache implementation supports it.

  |

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

| Version | Description | 
| [6.1.0](https://developer.wordpress.org/reference/since/6.1.0/) | Introduced. |

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