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

---

# apply_filters_deprecated( ‘rewrite_rules’, string $rules )

## In this article

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

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

This hook has been deprecated since 1.5.0. Use the {@see ‘mod_rewrite_rules’} filter
instead.

Filters the list of rewrite rules formatted for output to an .htaccess file.

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

 `$rules`string

mod_rewrite Rewrite rules formatted for .htaccess.

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

    ```php
    return apply_filters_deprecated( 'rewrite_rules', array( $rules ), '1.5.0', 'mod_rewrite_rules' );
    ```

[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/7.0/src/wp-includes/class-wp-rewrite.php#L1615)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-rewrite.php#L1615-L1615)

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

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

Retrieves mod_rewrite-formatted rewrite rules to write to .htaccess.

  |

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

| Version | Description | 
| [1.5.0](https://developer.wordpress.org/reference/since/1.5.0/) | Introduced. |

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