The redirect_canonical function in /wp-includes/canonical.php is called on any given URL and will attempt to best-guess the URL the user wanted, and redirect them to there, when a URL does not exist. It has a whole huge amount of code to do this for all sorts of common errors.
Related Posts:
- URL rewrite based on a custom field value
- Auto 301 to full post permalink? (using /posts/%post_id%/%postname%)
- Random Alphanumeric Key URLs
- Using WP rather than .htaccess to redirect pages/posts
- Redirect a Blogger Page URL to wordpress
- Passing the JQuery string to Worldpress URL
- Redirecting “wrong” but working links to their canonical URL in order to prevent search engine penalties (e.g. /123/ at the end of URLs)
- Custom permalink structure with %postname% in front of domain name
- corrupted URLs – can’t leave starting page
- remove SLASH on single_post but KEEP on categories and parent pages
- All pages lead to home
- WordPress permalink still not working (error or not understood?)
- My wordpress site must be being affected by outside sources [duplicate]
- How to remove dates from existing permalinks?
- Including category-base in a post permalink results in 404
- WordPress thinks my custom route is a 404
- How to prevent the default home rewrite to a static page
- “.#[random-char-string]” being inserted at end of URLs
- URL Rewrite + Page + Custom Post Type = Unusual Redirect
- Pretty Permalinks
- Remove parent slug for child pages
- How to remove the index.php in the url?
- How can I Rewrite a ‘page’ URL based on query string parameters?
- Redirect short-form URL to long-form URL (post_id to post_id + post_name)
- custom naming of search permalink /search/
- Rewrite user profile URL to be human friendly
- Stop redirecting to posts not in a category / duplicate slugs
- rewrite_rule for custom post type doesn’t affect get_permalink
- Add ‘articles’ prefix before blog posts url without affecting pagination
- custom permalink/shortlink with base62 encoded post ID
- How to 301 all posts
- WordPress within specific sub-directories, implicitly not root
- add new permalink structure from dynamic page
- WordPress not respecting template hierarchy (fetches index.php instead of single.php or page.php)
- Call to a member function add_rule() on a non-object
- Custom taxonomy rewrite using tax name instead of rewrite slug
- Why does chrome keep downloading a file instead of running the site?
- How can I add a page’s ID to its permalink using WP_Rewrite?
- Why is add_rewrite_endpoint incompatible with /%category%/%postname%/ permalink structure?
- Re-write specific custom post type category URL to go to another page
- Does rename of page slugs create 301 redirects from old slug to new (same as for posts)?
- Change blog segment of URL
- Custom Permalink
- add_rewrite_rule not working for me
- Using WP Rewrite, but just not “getting it”
- Change permalinks on move from one site to another
- Share same Slug for a Custom Post Type and 2 Taxonomies
- List / Get post redirects
- Rewrite CPT permalinks and include WPML language
- 301 Redirect for Non-Date Based URL’s
- IIS 7 Rewrite with parent categories
- Do WordPress Permalinks Refer to a Lookup Table in the Database?
- Permalinks only for posts
- Permalinks settings
- mod-rewrite exception? keep #hash in matching urls?
- Format HTTP links
- Change directory url to be same as page permalink?
- Visiting posts results in 404 errors after host migration
- Comment author url link is wrong? How to change from authors/ to author/
- Strange behavior with a redirect loop – involves WPML multi-language plugin
- Getting an ID from a URL, why can WP do this itself, but none of of the functions provided get it right?
- Configuring Home Page Address
- How can I set up a secondary permalink structure?
- WP-e-commerce (getshopped) – Annoying permalink issue [closed]
- How to Use metada Value in Url and is it possible? [duplicate]
- How do I rewrite attachment urls when permalink structure contains %category%?
- IIS7.5 URL rewrite pboblem on index page
- Custom child page permalink
- Safest way to create a custom permalink
- Creating an alternate path for a page
- How to change URL from /%postname%/ to custom-name/%category%/%year%/%monthnum%/%day%/%postname%/
- Create different permalinks for same post
- WordPress Attachment Page URL Rewrite!
- Redirect old /%category%/%postname%/ to just /%postname%/
- why wordpress keeps redirecting to old page after deleting it?
- Permalink not changing according to post type
- WP permalink working, but why content doesn’t display
- WordPress Multisite ABSPATH and get_home_path() to check for htaccess or web.config file
- Flushing rewrite rules enables to see an article, but I didnt change anything
- Redirect page to homepage, keeping URL
- How can I put WordPress in a directory but keep just the home page at the domain root?
- Change permalink structure with post id
- Updates all internal links on permalink update
- how to have same rewrite rules for 2 different post type?
- Permalink structure /page/page/cpt-post gives 404 with pagination
- What permastrusture tags are generated out of the box right after creating custom post types and taxonomies?
- Rewrite posts url as they’re all children of a page
- Multiple Permalink Patterns for one page
- Removed and Reinstalled WordPress, Redirect Broken now
- Pagination is not working, how to trace it properly?
- Why are all pages redirecting to homepage when using custom permalinks?
- How to shorten the Permalink after WP>WP blog import?
- .htaccess regex for redirect subdomain to root domain & redirect old permalinks
- how to create several url aliases for a page
- Single product link in woocomerce
- URL issues with WordPress
- 301 Redirect posts to newly added categories
- WordPress not remembering old slugs for pages
- Using a variable in page permalink
- Custom rewrite, url path with parameters to a page