add( 'tk_invite_code_error', sprintf( '%s: %s', __( 'ERROR', 'all-in-one-invite-code' ), __( 'You must include a Invite Code.', 'all-in-one-invite-code' ) ) ); } else { $tk_invite_code = sanitize_key( trim( $_POST['tk_invite_code'] ) ); // Validate teh code $result = all_in_one_invite_codes_validate_code( $tk_invite_code, $user_email ); if ( isset( $result['error'] ) ) { $errors->add( 'tk_invite_code_error', sprintf( '%s: %s', __( 'ERROR', 'all-in-one-invite-code' ), $result['error'] ) ); } } return $errors; } add_filter( 'registration_errors', 'all_in_one_invite_code_registration_errors', 10, 3 );