in order to have

Cache

class you need to import it

use Illuminate\Support\Facades\Cache;

$postCount = Cache::remember(
            'count.posts.' . $user->id,
            now()->addSeconds(30),
            function () use ($user) {
                return $user->posts->count();
            });

in this case the post count will be cached with different key on every user and will be retrieved by the authorized users id 2nd argument is expiration date, in this case 30 seconds in the future 3rd argument is a callback of what to do and store if cache is not found (is not set yet or 30 seconds has passed)