functions.php

<?php

/****************************************
Theme Setup
*****************************************/

require_once( get_template_directory() . '/lib/init.php' );
require_once( get_template_directory() . '/lib/theme-helpers.php' );
require_once( get_template_directory() . '/lib/theme-functions.php' );
require_once( get_template_directory() . '/lib/theme-comments.php' );


/****************************************
Require Plugins
*****************************************/

require_once( get_template_directory() . '/lib/class-tgm-plugin-activation.php' );
require_once( get_template_directory() . '/lib/theme-require-plugins.php' );

add_action( 'tgmpa_register', 'mb_register_required_plugins' );


/****************************************
Constants
*****************************************/

define('YT_API_KEY','AIzaSyCKhHOWwZ_0C2sixCrQW8hGbID4PL1BruA');
define('YT_PLAYLIST_ID','UUHWBRuQtDWvYqPdaGzkGjLA');


/****************************************
Misc Theme Functions
*****************************************/

/**
 * Define custom post type capabilities for use with Members
 */
function mb_add_post_type_caps() {
	// mb_add_capabilities( 'portfolio' );
}

/**
 * Filter Yoast SEO Metabox Priority
 */
add_filter( 'wpseo_metabox_prio', 'mb_filter_yoast_seo_metabox' );
function mb_filter_yoast_seo_metabox() {
	return 'low';
}


function be_sample_metaboxes( $meta_boxes ) {
	$prefix = '_cmb_'; // Prefix for all fields
	$meta_boxes[] = array(
        'id' => 'featured_metabox',
        'title' => 'Featured Metabox',
        'pages' => array('post'), // post type
        'context' => 'normal',
        'priority' => 'high',
        'show_names' => true, // Show field names on the left
        'fields' => array(
            array(
                'name' => 'Featured',
                'desc' => 'Is this a featured post?',
                'id' => $prefix . 'featured_value',
                'type' => 'checkbox'
            ),
        ),
    );

	return $meta_boxes;
}
add_filter( 'cmb_meta_boxes', 'be_sample_metaboxes' );

// Initialize the metabox class
add_action( 'init', 'be_initialize_cmb_meta_boxes', 9999 );
function be_initialize_cmb_meta_boxes() {
	if ( !class_exists( 'cmb_Meta_Box' ) ) {
		require_once( 'lib/metabox/init.php' );
	}
}