functions.php

<?php

require_once('wp_bootstrap_navwalker.php');

// Declare sidebar widget zone
    if (function_exists('register_sidebar')) {
    	register_sidebar(array(
    		'name' => 'Sidebar Widgets',
    		'id'   => 'sidebar-widgets',
    		'description'   => 'These are widgets for the sidebar.',
    		'before_widget' => '<div id="%1$s" class="widget %2$s">',
    		'after_widget'  => '</div>',
    		'before_title'  => '<h2>',
    		'after_title'   => '</h2>'
    	));
    }

    // Declare menus
    if (function_exists('register_nav_menus')){
    register_nav_menus(
        array(
            'main_nav' => 'Main Navigation Menu',
            'footer_nav' => 'Footer Menu'
            )
        );    
     }

    // Add support for Featured Images
    if (function_exists('add_theme_support')) {
    // add_theme_support('post-thumbnails', array( 'post', 'page' ) );
    add_theme_support('post-thumbnails');
    }

?>