Caching in CI4

Caching in CI4

// app/Config/Cache.php
public string $handler = "file";  // file, redis, memcached, predis, dummy

$cache = ConfigServices::cache();

// Store
$cache->save("key", $data, 3600);  // TTL in seconds

// Retrieve
$data = $cache->get("key");

// Delete
$cache->delete("key");
$cache->clean();  // clear all

// Cache-or-fetch pattern
if (!$posts = $cache->get("all_posts")) {
    $posts = model(PostModel::class)->findAll();
    $cache->save("all_posts", $posts, 3600);
}

// Page caching (cache entire response)
class PostController extends BaseController {
    public function index() {
        $this->cachePage(300);  // cache for 5 minutes
        return view("posts/index", ["posts" => model(PostModel::class)->findAll()]);
    }
}