Plugin API/Filter Reference/rewrite rules array

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1 Description
2 Parameters
3 Example
- 3.1 Removing Feed URLs
- 3.2 Sample Rewrite Rule Array
4 Source File
5 Related

Description

This filter hook can be used to any rule in the rewrite rules array.

Since rewrite rules are saved to the database, you must flush/update your rules from your admin under Settings > Permalinks before your changes will take effect. You can also use the flush_rules() function to do this programmatically.

Parameters

$rules

(array) (required) Existing rewrite rules to be filtered.

Default: None

Make sure you return the $rules array or very bad things will happen.

Example

Removing Feed URLs

This example demonstrates how you would remove feed URLs for a custom post type called 'foo'...

add_filter('rewrite_rules_array', 'kill_feed_rewrites');
function kill_feed_rewrites($rules){

    foreach ($rules as $rule => $rewrite) {

        if ( preg_match('/^foo.*(feed)/',$rule) ) {
            unset($rules[$rule]);
        }

    }

    return $rules;
}

Sample Rewrite Rule Array

This shows one example of what a var_dump() of a rewrite array might look like. Notice that this array even includes rules automatically generated for a custom post type called 'foo'.

array (size=103)
  'foo/?$' => string 'index.php?post_type=foo' (length=23)
  'foo/page/([0-9]{1,})/?$' => string 'index.php?post_type=foo&paged=$matches[1]' (length=41)
  'wp-types-group/[^/]+/attachment/([^/]+)/?$' => string 'index.php?attachment=$matches[1]' (length=32)
  'wp-types-group/[^/]+/attachment/([^/]+)/trackback/?$' => string 'index.php?attachment=$matches[1]&tb=1' (length=37)
  'wp-types-group/[^/]+/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'wp-types-group/[^/]+/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'wp-types-group/[^/]+/attachment/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?attachment=$matches[1]&cpage=$matches[2]' (length=50)
  'wp-types-group/([^/]+)/trackback/?$' => string 'index.php?wp-types-group=$matches[1]&tb=1' (length=41)
  'wp-types-group/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?wp-types-group=$matches[1]&feed=$matches[2]' (length=53)
  'wp-types-group/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?wp-types-group=$matches[1]&feed=$matches[2]' (length=53)
  'wp-types-group/([^/]+)/page/?([0-9]{1,})/?$' => string 'index.php?wp-types-group=$matches[1]&paged=$matches[2]' (length=54)
  'wp-types-group/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?wp-types-group=$matches[1]&cpage=$matches[2]' (length=54)
  'wp-types-group/([^/]+)(/[0-9]+)?/?$' => string 'index.php?wp-types-group=$matches[1]&page=$matches[2]' (length=53)
  'wp-types-group/[^/]+/([^/]+)/?$' => string 'index.php?attachment=$matches[1]' (length=32)
  'wp-types-group/[^/]+/([^/]+)/trackback/?$' => string 'index.php?attachment=$matches[1]&tb=1' (length=37)
  'wp-types-group/[^/]+/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'wp-types-group/[^/]+/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'wp-types-group/[^/]+/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?attachment=$matches[1]&cpage=$matches[2]' (length=50)
  'foo/[^/]+/attachment/([^/]+)/?$' => string 'index.php?attachment=$matches[1]' (length=32)
  'foo/[^/]+/attachment/([^/]+)/trackback/?$' => string 'index.php?attachment=$matches[1]&tb=1' (length=37)
  'foo/[^/]+/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'foo/[^/]+/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'foo/[^/]+/attachment/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?attachment=$matches[1]&cpage=$matches[2]' (length=50)
  'foo/([^/]+)/trackback/?$' => string 'index.php?foo=$matches[1]&tb=1' (length=30)
  'foo/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?foo=$matches[1]&feed=$matches[2]' (length=42)
  'foo/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?foo=$matches[1]&feed=$matches[2]' (length=42)
  'foo/([^/]+)/page/?([0-9]{1,})/?$' => string 'index.php?foo=$matches[1]&paged=$matches[2]' (length=43)
  'foo/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?foo=$matches[1]&cpage=$matches[2]' (length=43)
  'foo/([^/]+)(/[0-9]+)?/?$' => string 'index.php?foo=$matches[1]&page=$matches[2]' (length=42)
  'foo/[^/]+/([^/]+)/?$' => string 'index.php?attachment=$matches[1]' (length=32)
  'foo/[^/]+/([^/]+)/trackback/?$' => string 'index.php?attachment=$matches[1]&tb=1' (length=37)
  'foo/[^/]+/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'foo/[^/]+/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  'foo/[^/]+/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?attachment=$matches[1]&cpage=$matches[2]' (length=50)
  'category/(.+?)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?category_name=$matches[1]&feed=$matches[2]' (length=52)
  'category/(.+?)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?category_name=$matches[1]&feed=$matches[2]' (length=52)
  'category/(.+?)/page/?([0-9]{1,})/?$' => string 'index.php?category_name=$matches[1]&paged=$matches[2]' (length=53)
  'category/(.+?)/?$' => string 'index.php?category_name=$matches[1]' (length=35)
  'tag/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?tag=$matches[1]&feed=$matches[2]' (length=42)
  'tag/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?tag=$matches[1]&feed=$matches[2]' (length=42)
  'tag/([^/]+)/page/?([0-9]{1,})/?$' => string 'index.php?tag=$matches[1]&paged=$matches[2]' (length=43)
  'tag/([^/]+)/?$' => string 'index.php?tag=$matches[1]' (length=25)
  'type/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?post_format=$matches[1]&feed=$matches[2]' (length=50)
  'type/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?post_format=$matches[1]&feed=$matches[2]' (length=50)
  'type/([^/]+)/page/?([0-9]{1,})/?$' => string 'index.php?post_format=$matches[1]&paged=$matches[2]' (length=51)
  'type/([^/]+)/?$' => string 'index.php?post_format=$matches[1]' (length=33)
  'robots\.txt$' => string 'index.php?robots=1' (length=18)
  '.*wp-(atom|rdf|rss|rss2|feed|commentsrss2)\.php$' => string 'index.php?feed=old' (length=18)
  '.*wp-app\.php(/.*)?$' => string 'index.php?error=403' (length=19)
  '.*wp-register.php$' => string 'index.php?register=true' (length=23)
  'feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?&feed=$matches[1]' (length=27)
  '(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?&feed=$matches[1]' (length=27)
  'page/?([0-9]{1,})/?$' => string 'index.php?&paged=$matches[1]' (length=28)
  'comments/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?&feed=$matches[1]&withcomments=1' (length=42)
  'comments/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?&feed=$matches[1]&withcomments=1' (length=42)
  'comments/page/?([0-9]{1,})/?$' => string 'index.php?&paged=$matches[1]' (length=28)
  'search/(.+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?s=$matches[1]&feed=$matches[2]' (length=40)
  'search/(.+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?s=$matches[1]&feed=$matches[2]' (length=40)
  'search/(.+)/page/?([0-9]{1,})/?$' => string 'index.php?s=$matches[1]&paged=$matches[2]' (length=41)
  'search/(.+)/?$' => string 'index.php?s=$matches[1]' (length=23)
  'author/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?author_name=$matches[1]&feed=$matches[2]' (length=50)
  'author/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?author_name=$matches[1]&feed=$matches[2]' (length=50)
  'author/([^/]+)/page/?([0-9]{1,})/?$' => string 'index.php?author_name=$matches[1]&paged=$matches[2]' (length=51)
  'author/([^/]+)/?$' => string 'index.php?author_name=$matches[1]' (length=33)
  '([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&feed=$matches[4]' (length=80)
  '([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&feed=$matches[4]' (length=80)
  '([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/page/?([0-9]{1,})/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&paged=$matches[4]' (length=81)
  '([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]' (length=63)
  '([0-9]{4})/([0-9]{1,2})/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]&feed=$matches[3]' (length=64)
  '([0-9]{4})/([0-9]{1,2})/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]&feed=$matches[3]' (length=64)
  '([0-9]{4})/([0-9]{1,2})/page/?([0-9]{1,})/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]&paged=$matches[3]' (length=65)
  '([0-9]{4})/([0-9]{1,2})/?$' => string 'index.php?year=$matches[1]&monthnum=$matches[2]' (length=47)
  '([0-9]{4})/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?year=$matches[1]&feed=$matches[2]' (length=43)
  '([0-9]{4})/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?year=$matches[1]&feed=$matches[2]' (length=43)
  '([0-9]{4})/page/?([0-9]{1,})/?$' => string 'index.php?year=$matches[1]&paged=$matches[2]' (length=44)
  '([0-9]{4})/?$' => string 'index.php?year=$matches[1]' (length=26)
  '.?.+?/attachment/([^/]+)/?$' => string 'index.php?attachment=$matches[1]' (length=32)
  '.?.+?/attachment/([^/]+)/trackback/?$' => string 'index.php?attachment=$matches[1]&tb=1' (length=37)
  '.?.+?/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  '.?.+?/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  '.?.+?/attachment/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?attachment=$matches[1]&cpage=$matches[2]' (length=50)
  '(.?.+?)/trackback/?$' => string 'index.php?pagename=$matches[1]&tb=1' (length=35)
  '(.?.+?)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?pagename=$matches[1]&feed=$matches[2]' (length=47)
  '(.?.+?)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?pagename=$matches[1]&feed=$matches[2]' (length=47)
  '(.?.+?)/page/?([0-9]{1,})/?$' => string 'index.php?pagename=$matches[1]&paged=$matches[2]' (length=48)
  '(.?.+?)/comment-page-([0-9]{1,})/?$' => string 'index.php?pagename=$matches[1]&cpage=$matches[2]' (length=48)
  '(.?.+?)(/[0-9]+)?/?$' => string 'index.php?pagename=$matches[1]&page=$matches[2]' (length=47)
  '[^/]+/attachment/([^/]+)/?$' => string 'index.php?attachment=$matches[1]' (length=32)
  '[^/]+/attachment/([^/]+)/trackback/?$' => string 'index.php?attachment=$matches[1]&tb=1' (length=37)
  '[^/]+/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  '[^/]+/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  '[^/]+/attachment/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?attachment=$matches[1]&cpage=$matches[2]' (length=50)
  '([^/]+)/trackback/?$' => string 'index.php?name=$matches[1]&tb=1' (length=31)
  '([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?name=$matches[1]&feed=$matches[2]' (length=43)
  '([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?name=$matches[1]&feed=$matches[2]' (length=43)
  '([^/]+)/page/?([0-9]{1,})/?$' => string 'index.php?name=$matches[1]&paged=$matches[2]' (length=44)
  '([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?name=$matches[1]&cpage=$matches[2]' (length=44)
  '([^/]+)(/[0-9]+)?/?$' => string 'index.php?name=$matches[1]&page=$matches[2]' (length=43)
  '[^/]+/([^/]+)/?$' => string 'index.php?attachment=$matches[1]' (length=32)
  '[^/]+/([^/]+)/trackback/?$' => string 'index.php?attachment=$matches[1]&tb=1' (length=37)
  '[^/]+/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  '[^/]+/([^/]+)/(feed|rdf|rss|rss2|atom)/?$' => string 'index.php?attachment=$matches[1]&feed=$matches[2]' (length=49)
  '[^/]+/([^/]+)/comment-page-([0-9]{1,})/?$' => string 'index.php?attachment=$matches[1]&cpage=$matches[2]' (length=50)

Source File

rewrite_rules_array is located in wp-includes/rewrite.php.

Articles

Lesson: Rewrite API Overview
Class: WP_Rewrite() - An overview of WordPress's built-in URL rewrite class.

Hooks

Filter: root_rewrite_rules - Filters the rewrite rules generated for the root of your weblog.
Filter: post_rewrite_rules - Filters the rewrite rules generated for permalink URLs.
Filter: page_rewrite_rules - Filters the rewrite rules generated for your Pages.
Filter: date_rewrite_rules - Filters the rewrite rules generated for dated archive URLs.
Filter: search_rewrite_rules - Filters the rewrite rules generated for search URLs.
Filter: comments_rewrite_rules - Filters the rewrite rules generated for the latest comment feed URLs.
Filter: author_rewrite_rules - Filters the rewrite rules generated for author archive URLs.
Filter: rewrite_rules_array - Filters all the rewrite rules at once.
Filter: {$permastruct}_rewrite_rules - Can be used to create or modify rewrite rules for any custom permastructs, such as taxonomies or custom post types.
Action: generate_rewrite_rules - Runs after all the rules have been created.

Functions

add_rewrite_tag() - Can be used to allow WordPress to recognize custom variables (particularly custom querystring variables).
add_rewrite_rule() - Allows you to specify new, custom rewrite rules.
add_rewrite_endpoint() - Add a new endpoint like /trackback/
flush_rules() - Regenerate the rewrite rules and save them to the database.
flush_rewrite_rules() - Remove rewrite rules and then recreate rewrite rules.
generate_rewrite_rules() - Generates rewrite rules from a permalink structure
add_permastruct() - Add a new permastruct
add_feed()- Add a new feed type like /atom1/

Codex