PHP Closure used as a hook callback for WordPress

front-page.php

<?php

/**
 * Add class to the HTML Body tag
 * 
 * @since 1.0.0
 * 
 * @param array     $classes
 * @return array
 */
add_filter( 'body_class', function ( $classes ) {

	$classes[] = 'wpdevsclub-school';

	return $classes;
} );

/**
 * Modify the Genesis Footer Credits
 * 
 * @since 1.0.0
 * 
 * @param string     $credits
 * @return string
 */
add_action( 'genesis_footer_creds_text', function( $credits ) {
	return sprintf( '[footer_copyright after=" %s"] &#x000B7; All Rights Reserved &#x000B7; %s [footer_genesis_link url="http://www.studiopress.com/"] & [footer_wordpress_link] &#x000B7; <a href="http://wpdevelopersclub.com/go/siteground" target="_blank">%s</a>',
		__( 'WP Developers Club', 'wpdevsclub' ),
		__( 'Powered with <i class="fa fa-heart"></i> by ', 'wpdevsclub' ),
		__( 'Hosted by <i class="fa fa-heart"></i> SiteGround ', 'wpdevsclub' )
	);
} );