src/Symfony/Component/WebLink/README.md
The WebLink component manages links between resources. It is particularly useful to advise clients to preload and prefetch documents through HTTP and HTTP/2 pushes.
This component implements the HTML5's Links, Preload and Resource Hints W3C's specifications. It can also be used with extensions defined in the HTML5 link type extensions wiki.
composer require symfony/web-link
use Symfony\Component\WebLink\GenericLinkProvider;
use Symfony\Component\WebLink\HttpHeaderSerializer;
use Symfony\Component\WebLink\Link;
$linkProvider = (new GenericLinkProvider())
->withLink(new Link('preload', '/bootstrap.min.css'));
header('Link: '.(new HttpHeaderSerializer())->serialize($linkProvider->getLinks()));
echo 'Hello';