Title: permalink_structure_changed
Published: April 25, 2014
Last modified: April 28, 2025

---

# do_action( ‘permalink_structure_changed’, string $old_permalink_structure, string $permalink_structure )

## In this article

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

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

Fires after the permalink structure is updated.

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

 `$old_permalink_structure`string

The previous permalink structure.

`$permalink_structure`string

The new permalink structure.

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

    ```php
    do_action( 'permalink_structure_changed', $old_permalink_structure, $permalink_structure );
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-rewrite.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-rewrite.php#L1977)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-rewrite.php#L1977-L1977)

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

| Used by | Description | 
| [WP_Rewrite::set_permalink_structure()](https://developer.wordpress.org/reference/classes/wp_rewrite/set_permalink_structure/)`wp-includes/class-wp-rewrite.php` |

Sets the main permalink structure for the site.

  |

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

| Version | Description | 
| [2.8.0](https://developer.wordpress.org/reference/since/2.8.0/) | Introduced. |

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