functions.php

<?php
/**
 * The tktk theme functions and definitions
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package tktk
 */

/**
 * This ensures that Timber is loaded and available as a PHP class.
 * If not, it gives an error message to help direct developers on where to activate
 */

if ( ! class_exists( 'Timber' ) ) {
	add_action(
		'admin_notices',
		function() {
			echo '<div class="error"><p>Timber not activated. Make sure you activate the plugin in <a href="' . esc_url( admin_url( 'plugins.php#timber' ) ) . '">' . esc_url( admin_url( 'plugins.php' ) ) . '</a></p></div>';
		}
	);

	add_filter(
		'template_include',
		function( $template ) {
			return get_stylesheet_directory() . '/static/no-timber.html';
		}
	);
	return;
};

require_once __DIR__ . '/vendor/autoload.php';
require_once __DIR__ . '/classes/Setup.php';
require_once __DIR__ . '/classes/Enqueue.php';
require_once __DIR__ . '/classes/TimberContext.php';