Title: is_user_member_of_blog
Published: August 20, 2026

---

# apply_filters( ‘is_user_member_of_blog’, bool $is_member, int $user_id, int $blog_id )

## In this article

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

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

Filters whether the user is a member of a given blog.

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

This filter only runs when the user and blog have both been resolved to valid records
on a multisite installation; it is not invoked for logged-out requests, unknown 
users, or archived/spammed/deleted sites.

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

 `$is_member`bool

Whether the user is a member of the blog.

`$user_id`int

The user ID being checked.

`$blog_id`int

The blog ID being checked.

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

    ```php
    return (bool) apply_filters( 'is_user_member_of_blog', $is_member, $user_id, $blog_id );
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/user.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/user.php#L1222)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/user.php#L1222-L1222)

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

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

Finds out whether a user is a member of a given blog.

  |

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

| Version | Description | 
| [7.1.0](https://developer.wordpress.org/reference/since/7.1.0/) | Introduced. |

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