In WordPress 6.7, usernames are limited to 60 characters, and this value is hard-coded with no filter (source), so no proper way to change it. Allowing more than 60 characters would mean changing core, which is bad practice.
Link WordPress Comment Admin Author name with About page
wp_user_query with meta_value_num for leaderboard
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Username character requirements
Using the regex posted by Moaz (and adding capitals), we will need to hook into the registration_errors filter: // Restrict username registration to alphanumerics add_filter(‘registration_errors’, ‘limit_username_alphanumerics’, 10, 3); function limit_username_alphanumerics ($errors, $name) { if ( ! preg_match(‘/^[A-Za-z0-9]{3,16}$/’, $name) ){ $errors->add( ‘user_name’, __(‘<strong>ERROR</strong>: Username can only contain alphanumerics (A-Z 0-9)’,’CCooper’) ); } return $errors; }
I’m guessing you’ve tried clicking on the “Your post password?” link below the login, and are (for some reason) unable to receive the resulting email. If you have direct access to the database, you can update the password directly: update wp_users set user_pass=md5(‘my_new_password’) where user_name=”my_login”);
Check for alphanumeric For more details, look at the regex Q on SO. $name=”input string 123″; // Doesn”t allow: // Pre-/Appending white space // Not more than one space in between // Non-alphanumeric characters (lower case) if( ! preg_match( “/^[a-z0-9]+([\\s]{1}[a-z0-9]|[a-z0-9])+$/i”, $name ) ) { // Output Error Message } // Or: Does only allow // … Read more
One can find the username of post author in multiple ways. For example, yoursite.com/?author=1 may reveal the username. Even though, it is easy to find the username, it is still not recommended to keep the username for posts. However, it is okay to do so.