Custom Username | WordPress.org

Hi. I’d like my member’s usernames to be constrained to A-Z, 0-9, with no spaces, default to uppercase, and with a maximum of 8 characters in length. If there is a way to also set the default font-family as well, that would be great. I have Code Snippets installed and have made several attempts, but nothing I’ve tried affects the Username field on the account setup page.

Here is an example of what I have tried:

function my_custom_user_registration_changes( $userdata ) {

// Remove any spaces $user_login = str_replace(‘ ‘, ”, $userdata[‘user_login’]);

// Remove any characters that are not letters or numbers $user_login = preg_replace(‘/[^A-Za-z0-9]/’, ”, $user_login);

// Convert to uppercase $user_login = strtoupper($user_login);

// Trim to a maximum length of 8 characters $user_login = substr($user_login, 0, 8);

// Assign the cleaned and formatted user login back to userdata $userdata[‘user_login’] = $user_login; return $userdata; }

add_filter(‘pmpro_checkout_new_user_array’, ‘my_custom_user_registration_changes’, 10, 1);

The page I need help with: [log in to see the link]