username

nickname field is one of the options made available for choice in “Display name publicly as” option in user profile. It has no other use in core code, as far as I know.

AFAIK the default option in the display name dropdown is set to the current value of user display name. So, if we on user creation set display_name to “Lastname Firstname”, then this will be used as default. This can be done hooking user_register: add_action(‘user_register’, ‘last_name_first’); function last_name_first( $uid ) { remove_action(‘user_register’, ‘last_name_first’); $user = new … Read more

Answer originally posted on another question which was more “why we can’t” instead of “how”: https://web.archive.org/web/20210408084000/https://wordpress.stackexchange.com/questions/135304/why-cant-i-update-username-through-wordpress-api/386265 Here is the solution I used to change the username properly (based on https://www.wpbeginner.com/wp-tutorials/how-to-change-your-wordpress-username/ which had missing information): I was able to change the username simply with SQL using update wp_users set user_login = “old_username”, user_nicename = “new_username” where … Read more

In the en_GB version of the .mo translation file, this string is available: <strong>ERROR</strong>: Invalid username. <a href=\”%s\” title=\”Password Lost and Found\”>Lost your password</a>? and the reference is from wp-includes/user.php on line 93. I found this using Poedit and searching using Ctrl + F. From line 93 we get the following code: return new WP_Error( … Read more

check this plugin hebrew username u need to use regex – [\p{Hebrew}a-zA-Z]