PHP: WP: Get All Users from Certain Roles

PHP: WP: Get All Users from Certain Roles

// Get all users from multiple roles
// http://wordpress.stackexchange.com/questions/39315/get-multiple-roles-with-get-users
function get_authors() {

    $users = array();
    // List these in heirarchical order
    $roles = array('editor', 'author', 'contributor');

    foreach ($roles as $role) :
        $users_query = new WP_User_Query( array(
            'fields' => 'all_with_meta',
            'role' => $role,
            'orderby' => 'post_count',
            'order' => 'DESC',
            'orderby' => 'display_name'
            ) );
        $results = $users_query->get_results();
        if ($results) $users = array_merge($users, $results);
    endforeach;

    return $users;
}