<?php
defined('ABSPATH') || exit;
function rocket_dns_prefetch($hints, $relation_type)
{
if (defined('DONOTROCKETOPTIMIZE') && DONOTROCKETOPTIMIZE) {
return $hints;
}
$domains = rocket_get_dns_prefetch_domains();
if ((bool) $domains) {
foreach ($domains as $domain) {
if ('dns-prefetch' === $relation_type) {
$hints[] = $domain;
}
}
}
return $hints;
}
add_filter('wp_resource_hints', 'rocket_dns_prefetch', 10, 2);