Title: ms_is_switched
Published: April 25, 2014
Last modified: May 20, 2026

---

# ms_is_switched(): bool

## In this article

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

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

Determines if [switch_to_blog()](https://developer.wordpress.org/reference/functions/switch_to_blog/)
is in effect.

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

 bool True if switched, false otherwise.

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

    ```php
    function ms_is_switched() {
    	return ! empty( $GLOBALS['_wp_switched_stack'] );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/ms-blogs.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/ms-blogs.php#L717)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L717-L719)

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

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

A non-filtered, non-cached version of [wp_upload_dir()](https://developer.wordpress.org/reference/functions/wp_upload_dir/) that doesn’t check the path.

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

Flushes rewrite rules if `siteurl`, `home` or `page_on_front` changed.

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

Switches the theme.

  |

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

| Version | Description | 
| [3.5.0](https://developer.wordpress.org/reference/since/3.5.0/) | Introduced. |

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