How to Cache Queries in Laravel

Laravel's Cache facade supports many drivers (Redis, Memcached, file, database) and integrates cleanly with Eloquent.

Step 1 — Configure Cache Driver

# .env
CACHE_STORE=redis
REDIS_HOST=127.0.0.1
REDIS_PORT=6379

Step 2 — Cache a Query Result

use Illuminate\Support\Facades\Cache;

// remember() fetches from cache, or runs the closure and stores the result
$topics = Cache::remember('topics.all', now()->addHours(6), function () {
    return Topic::where('status', 0)->orderBy('name')->get();
});

Step 3 — Cache Forever and Forget

// Store indefinitely
Cache::forever('settings', Setting::all()->keyBy('key'));

// Invalidate when data changes
Cache::forget('settings');

// Or use tags (Redis/Memcached only)
Cache::tags(['settings'])->flush();

Step 4 — Invalidate in Observers

// app/Observers/TopicObserver.php
public function saved(Topic $topic): void
{
    Cache::forget('topics.all');
}

public function deleted(Topic $topic): void
{
    Cache::forget('topics.all');
}