1

user_nicename has the same value with user_login. I want to change user_nicename value only by using code snippet into functions.php or wp-config.php. Is it possible without using phpmyadmin or any plugin?

  • Note that user_nicename and user_login are separate for a reason, and they aren't the same. user_nicename is the URL sanitized version of user_login, changing it to something else might break things in unexpected ways. Perhaps you actually wanted to change display_name? – Tom J Nowell Dec 13 '18 at 2:53
  • Hi @TomJNowell , I wanted to change user_nicename only because if I didn't change it, hackers can detect it easy via url and attack to my blog. (brute force). The blog is more secure now. – Serdar Koçak Dec 13 '18 at 13:09
  • usernames and IDs aren't secret, they can be fetched via the REST API, XML RPC, even the CSS classes and URLs in a webpage. Doing this does nothing to improve your security, and if your sites security depends on these things being secret then you have major problems – Tom J Nowell Dec 13 '18 at 16:32
  • @TomJNowell Could you please clarify what kind of problems do you mean? I didn't change user_login table. I changed user_nicename only. Also I blocked XML-RPC and REST API requests. There is no css class about user_login. My blog is minimal. user_nicename is used to create author permalink only. Hackers can discover username by author query. So I changed it only. – Serdar Koçak Dec 14 '18 at 0:05
  • e.g. on the author pages, when you comment on things. Also by blocking the REST API you're crippling a number of plugins and core features, e.g. the 5.0 block editor, Yoast SEO, Jetpack, etc User IDs and logins aren't a secret, they were never meant to be a secret, and exposing them shouldn't be a security risk. What we have here is security theatre. The only reason user_nicename exists is because if you have an umlaut or other non-URL friendly character in your username, it wouldn't match when you did the query, so it sanitises it ahead of time for performance – Tom J Nowell Dec 14 '18 at 14:35
2

Yes, you can use wp_update_user():

wp_update_user( array(
    'ID'            => 123,
    'user_nicename' => 'value'
) );

Just replace 123 with the proper user ID, and value with the preferred user_nicename value.

The function also enables you to change the value of other fields in the WordPress users table (wp_users).

  • You're welcome. :) – Sally CJ Dec 13 '18 at 2:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.