WordPress Version: 6.1
/**
* Checks whether blog is public before returning sites.
*
* @since 2.1.0
*
* @param mixed $sites Will return if blog is public, will not return if not public.
* @return mixed Empty string if blog is not public, returns $sites, if site is public.
*/
function privacy_ping_filter($sites)
{
if ('0' != get_option('blog_public')) {
return $sites;
} else {
return '';
}
}