add url / slug from page/pages to body WordPress

add_url_to_body

/**
 * Adds custom classes to the array of body classes.
 * Based @Underscores.me
 * @param array $classes Classes for the body element.
 * @return array
 */
function ks_body_classes( $classes ) {
	// Adds a class of group-blog to blogs with more than 1 published author.
	if ( is_multi_author() ) {
		$classes[] = 'group-blog';
	}

    global $wp_query;
    $page = '';
    if (is_front_page() ) {
        $page = 'home';
    } elseif (is_page()) {
        $page = $wp_query->query_vars["pagename"];
    }
    if ($page)
        echo 'class= "'. $page . '"';

	// Adds a class of hfeed to non-singular pages.
	if ( ! is_singular() ) {
		$classes[] = 'hfeed';
	}

	return $classes;
}
add_filter( 'body_class', 'ks_body_classes' );