wp_sanitize_redirect example

        $status = apply_filters( 'wp_redirect_status', $status, $location );

        if ( ! $location ) {
            return false;
        }

        if ( $status < 300 || 399 < $status ) {
            wp_die( __( 'HTTP redirect status code must be a redirection code, 3xx.' ) );
        }

        $location = wp_sanitize_redirect( $location );

        if ( ! $is_IIS && 'cgi-fcgi' !== PHP_SAPI ) {
            status_header( $status ); // This causes problems on IIS and some FastCGI setups.         }

        /** * Filters the X-Redirect-By header. * * Allows applications to identify themselves when they're doing a redirect. * * @since 5.1.0 * * @param string $x_redirect_by The application doing the redirect. * @param int $status Status code to use. * @param string $location The path to redirect to. */