wp_dependencies_unique_hosts

	foreach ( $meta_tags as $meta_tag ) {
		echo "$meta_tag\n";
	}
}

/**
 * Prints resource hints to browsers for pre-fetching, pre-rendering
 * and pre-connecting to web sites.
 *
 * Gives hints to browsers to prefetch specific pages or render them
 * in the background, to perform DNS lookups or to begin the connection
 * handshake (DNS, TCP, TLS) in the background.
 *
 * These performance improving indicators work by using `<link rel"…">`.
 *
 * @since 4.6.0
 */
function wp_resource_hints() {
	$hints = array(
		'dns-prefetch' => wp_dependencies_unique_hosts(),
		'preconnect'   => array(),
		'prefetch'     => array(),
		'prerender'    => array(),
	);