Add User Role Name In Body Class

Description

With this code we can add a class with the user role name in the body to control styles and behaviors of the website from CSS.

Code

if ( is_user_logged_in() ) {
    add_filter('body_class','add_role_to_body');
    add_filter('admin_body_class','add_role_to_body');
}
function add_role_to_body($classes) {
    $current_user = new WP_User(get_current_user_id());
    $user_role = array_shift($current_user->roles);
    if (is_admin()) {
        $classes .= 'role-'. $user_role;
    } else {
        $classes[] = 'role-'. $user_role;
    }
    return $classes;
}