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/** * Use user_login as fallback when email is empty or invalid. * * @since 1.0.0 * * @param string $email_address The email address. * @param int $user_id The user ID. * @return string The email address to use. */ function wpf_use_username_as_email_fallback( $email_address, $user_id ) { // If email is empty or invalid, try to use username instead if ( empty( $email_address ) || ! is_email( $email_address ) ) { $user = get_user_by( 'id', $user_id ); if ( $user && ! empty( $user->user_login ) ) { // Only use user_login if it looks like an email address if ( is_email( $user->user_login ) ) { return $user->user_login; } } } return $email_address; } add_filter( 'wpf_get_contact_id_email', 'wpf_use_username_as_email_fallback', 10, 2 );
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