Disable WordPress URL auto complete

4 comments

1. I believe that is the redirect_canonical function hooked to template_redirect. You should be able to disable it with:

   remove_filter('template_redirect', 'redirect_canonical'); 
   

   But you should really think about whether you want to do that as it is fairly complicated and performs some important SEO functions:

   Redirects incoming links to the proper URL based on the site url.

   Search engines consider http://www.somedomain.com and somedomain.com to be
   two different URLs when they both go to the same location. This SEO
   enhancement prevents penalty for duplicate content by redirecting all
   incoming links to one or the other.

   Prevents redirection for feeds, trackbacks, searches, comment popup,
   and admin URLs. Does not redirect on non-pretty-permalink-supporting
   IIS 7, page/post previews, WP admin, Trackbacks, robots.txt, searches,
   or on POST requests.

   Will also attempt to find the correct link when a user enters a URL
   that does not exist based on exact WordPress query. Will instead try
   to parse the URL or query in an attempt to figure the correct page to
   go to.

   http://core.trac.wordpress.org/browser/tags/3.5.1/wp-includes/canonical.php#L13

   The following might kill the autocompletion without messing with the SEO component, but I can’t promise that. The code is barely tested as I have never wished to disable this. I’d really have to study redirect_canonical to be sure of anything.

   function kill_404_redirect_wpse_92103() {
     if (is_404()) {
      add_action('redirect_canonical','__return_false');
     }
   }
   add_action('template_redirect','kill_404_redirect_wpse_92103',1);
   

2. This seems terribly irresponsible, to have this “guessing” occur automatically. I would be much more open to it if there were some means of defining which was the correct page to go to.

   I have numerous pages that are built as a sequence, and this auto-guessing is incorrectly choosing to respond with pages that are (randomly?) somewhere in the sequence, as opposed to the starting page.

   UPDATE: This is known behavior, and is being considered here: https://core.trac.wordpress.org/ticket/16557

3. As a follow up to FitPM’s answer – a plugin has been created that disables the auto-guessing behavior.

   It works fine for me on WordPress 4.8 as of August 2, 2017. The plugin is here: https://wordpress.org/plugins/disable-url-autocorrect-guessing/

4. One note: If one disables redirect_canonical (e.g. with remove_action('template_redirect', 'redirect_canonical');), random links like https://tld.com/some-random-string/blogpost also work (the content of https://tld.com/real-category-slug/blogpost is shown).

   If you want to prevent that and return 404 on those random urls, use something like

   add_filter( 'redirect_canonical', function( $redirect_url ) {
       $url = 'http'.((isset($_SERVER['HTTPS'])&&$_SERVER['HTTPS']!=='off')?'s':'').'://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
       if( $redirect_url !== $url ) {
           global $wp_query;
           $wp_query->set_404();
           status_header( 404 );
           nocache_headers();
       }
       return false; 
   });
   

Comments are closed.