Problema de minificação HTML: Como colocar código no functions.php

include_once 'ruta/a/tu/script.txt';

/*  ----------------------------------------------------------------------------
    deploy mode - this file tells the theme what settings to load (demo, (dev) development, deploy)
 */
require_once('td_deploy_mode.php');


/*  ----------------------------------------------------------------------------
    wp_cake - this is our theme framework - all the content and settings are there
 */
require_once('includes/td_wp_cake.php');


/*
 * author meta support
 */
require_once('wp-admin/td_author.php' );


/*
 * generic filter support
 */
require_once('includes/class/td_generic_filter_array.php' );


/*
 * generic filter buider class
 */
require_once('includes/content_builder/td_generic_filter_builder.php' );


/*
 * modal window for user login
 */
require_once('includes/app/td_login.php' );


/*
 * if debug - the constants are used to load the live color customizer (demo) and to remove the tf bar on ios devices
 */
if (TD_DEBUG_LIVE_THEME_STYLE) {
    require_once('includes/deploy/td_theme_style.php' );
}

if (TD_DEBUG_IOS_REDIRECT) {
    require_once('includes/deploy/td_ios_redirect.php' );
}

require_once('includes/app/widgets/td_login_widget.php' );

include_once('minificar-html.php');