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The original urls for users look like /author/login/

Is it possible to replace login by user's id?

In my dream urls should become to /users/34/ (34 is user id).


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Why do you want to use user IDs instead of user names? IDs are very user unfriendly. – MikeSchinkel Mar 29 '11 at 4:03
up vote 4 down vote accepted

you need 3 simple functions and hooks

first change the author base:

//change author/username base to users/userID
function change_author_permalinks() {
  global $wp_rewrite;
   // Change the value of the author permalink base to whatever you want here
   $wp_rewrite->author_base = 'users';


then add users to query_vars:

add_filter('query_vars', 'users_query_vars');
function users_query_vars($vars) {
    // add lid to the valid list of variables
    $new_vars = array('users');
    $vars = $new_vars + $vars;
    return $vars;

then add the new rewrite rule:

function user_rewrite_rules( $wp_rewrite ) {
  $newrules = array();
  $new_rules['users/(\d*)$'] = 'index.php?author=$matches[1]';
  $wp_rewrite->rules = $new_rules + $wp_rewrite->rules;

Now if you don't know how to use this, just copy all of the code and paste in your theme's functions.php file.

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the last remark is for new users :) – Bainternet Mar 29 '11 at 0:25
You are aware an 'init' hook with a $wp_rewrite->flush_rules() can bring a site to it's knees, right? I just had to do emergency debugging for a client using a plugin that did that; it was taking up to 90 seconds to load a page. Commenting out that line brought page loads down to less than 1 second. flush_rules() need to go in a plugin activation hook, or at least be surrounded by an if (get_option(...)) {...}. – MikeSchinkel Mar 29 '11 at 4:12
+1 Mike - Also my concern, i was about to post a similar comment, let's not encourage users to flush rules on init. – t31os Mar 29 '11 at 11:28
@Mike , @t31os: So you are saying that $wp_rewrite->flush_rules(); should only run once (say on activation) , and the setup should be run on every init? – Bainternet Mar 29 '11 at 12:00
Correct. I've been toying with the idea of using getlastmod() and an option value to run $wp_rewrite->flush_rules(); only once after the .php file is changed; that might be a good way to go that would not require creating a plugin. – MikeSchinkel Mar 29 '11 at 21:28

You could use an htaccess rule to rewrite /users/34 to /?author=34

share|improve this answer
Since there are ways to do this with WordPress plugins I'd personally recommend avoiding the complexity of .htaccess. – MikeSchinkel Mar 29 '11 at 21:47

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