Fires when submitting registration form data, before the user is created.

$sanitized_user_login string

The submitted username after being sanitized.

$user_email string

The submitted email.

$errors WP_Error

Contains any errors with submitted username and email, e.g., an empty field, an invalid username or email, or an existing username or email.

This action hook can be used to handle post data from a user registration before the registration_errors filter is called or errors are returned.

Please note that this hook should never be used for custom validation. Any custom validation rules should be performed using the registration_errors filter.

File: wp-includes/user.php. View all references

do_action( 'register_post', $sanitized_user_login, $user_email, $errors );