add_filter( 'wp_robots', 'skill_robots' );
if ( !function_exists( 'skill_robots' ) ) {
function skill_robots( $robots ) {
if ( is_archive() && !have_posts() ) {
$robots['noindex'] = true;
$robots['nofollow'] = true;
}
$robots['max-snippet'] = '-1';
$robots['max-image-preview'] = 'large';
$robots['max-video-preview'] = '-1';
return $robots;
}
}