Laravel Caching

Last modified on: September 4, 2025

<h1 data-start="67" data-end="89">🔹 Laravel Caching</h1>
<p data-start="91" data-end="304">Caching is the process of <strong data-start="117" data-end="149">storing frequently used data</strong> in a fast-access location so that future requests are served more quickly.<br data-start="224" data-end="227" />Laravel provides a simple and unified API for different cache drivers like:</p>
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<p data-start="308" data-end="349"><code data-start="308" data-end="314">file</code> (default, stores cache in files)</p>
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<p data-start="352" data-end="364"><code data-start="352" data-end="362">database</code></p>
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<p data-start="367" data-end="376"><code data-start="367" data-end="374">redis</code></p>
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<p data-start="379" data-end="392"><code data-start="379" data-end="390">memcached</code></p>
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<p data-start="395" data-end="418"><code data-start="395" data-end="402">array</code> (for testing)</p>
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<p data-start="420" data-end="541">By using caching effectively, you can <strong data-start="458" data-end="485">reduce database queries</strong>, <strong data-start="487" data-end="510">improve performance</strong>, and <strong data-start="516" data-end="538">make apps scalable</strong>.</p>
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<h2 data-start="548" data-end="577">🛠️ 1. Configuring Cache</h2>
<p data-start="579" data-end="607">Cache configuration is in:</p>
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<pre class="language-php"><code>config/cache.php</code></pre>
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<p data-start="639" data-end="673">Set your cache driver in <code data-start="664" data-end="670">.env</code>:</p>
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<pre class="language-php"><code>CACHE_DRIVER=file</code></pre>
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<h2 data-start="710" data-end="743">🛠️ 2. Storing Data in Cache</h2>
<h3 data-start="745" data-end="779">Example: Save for 10 minutes</h3>
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<pre class="language-php"><code>use Illuminate\Support\Facades\Cache;

// Store data for 10 minutes
Cache::put('key', 'value', 600);

// Or using minutes directly
Cache::put('user_1', $user, now()-&gt;addMinutes(10));</code></pre>
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<h2 data-start="981" data-end="1019">🛠️ 3. Retrieving Data from Cache</h2>
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<pre class="language-php"><code>$value = Cache::get('key');

// Default value if key doesn&rsquo;t exist
$value = Cache::get('key', 'default');</code></pre>
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<h2 data-start="1144" data-end="1180">🛠️ 4. Storing Data Permanently</h2>
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<pre class="language-php"><code>Cache::forever('site_name', 'My Laravel App');</code></pre>
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<h2 data-start="1246" data-end="1272">🛠️ 5. Removing Cache</h2>
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<pre class="language-php"><code>Cache::forget('key');
Cache::flush();   // remove all cache</code></pre>
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<h2 data-start="1351" data-end="1386">🛠️ 6. Check if a Cache Exists</h2>
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<pre class="language-php"><code>if (Cache::has('user_1')) {
    echo "User found in cache!";
}</code></pre>
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<h2 data-start="1468" data-end="1506">🛠️ 7. Cache Helper: <code data-start="1492" data-end="1504">remember()</code></h2>
<p data-start="1508" data-end="1552">This is commonly used for caching queries.</p>
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<pre class="language-php"><code>$users = Cache::remember('users', 3600, function () {
    return DB::table('users')-&gt;get();
});</code></pre>
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<p data-start="1662" data-end="1753">👉 If the cache exists &rarr; return it<br data-start="1696" data-end="1699" />👉 Otherwise &rarr; execute query &amp; store result in cache</p>
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<h2 data-start="1760" data-end="1807">🛠️ 8. Cache Once and Remove Automatically</h2>
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<pre class="language-php"><code>$users = Cache::remember('users', 3600, function () {
    return DB::table('users')-&gt;get();
});</code></pre>
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<h2 data-start="1911" data-end="1954">🛠️ 9. Cache and Increment / Decrement</h2>
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<pre class="language-php"><code>Cache::increment('visits');
Cache::decrement('visits');</code></pre>
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<h2 data-start="2029" data-end="2067">🛠️ 10. Tagged Cache (for Groups)</h2>
<p data-start="2069" data-end="2111">Useful when clearing only related cache.</p>
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<pre class="language-php"><code>Cache::tags(['users', 'admins'])-&gt;put('user_1', $user, 600);

Cache::tags('users')-&gt;flush(); // clear only user-related cache</code></pre>
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<h2 data-start="2256" data-end="2299">🛠️ 11. Database Query Caching Example</h2>
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<pre class="language-php"><code>$products = Cache::remember('products', 3600, function () {
    return Product::with('category')-&gt;get();
});</code></pre>
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<h2 data-start="2427" data-end="2465">🛠️ 12. Redis / Memcached Example</h2>
<p data-start="2467" data-end="2479">In <code data-start="2470" data-end="2476">.env</code>:</p>
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<pre class="language-php"><code>CACHE_DRIVER=redis</code></pre>
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<p data-start="2512" data-end="2520">Usage:</p>
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<pre class="language-php"><code>Cache::put('settings', ['theme' =&gt; 'dark'], 600);
$settings = Cache::get('settings');</code></pre>
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<h2 data-start="2625" data-end="2661">🛠️ 13. Cache in Routes Example</h2>
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<pre class="language-php"><code>Route::get('/users', function () {
    return Cache::remember('users_list', 60, function () {
        return App\Models\User::all();
    });
});</code></pre>
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<h2 data-start="2825" data-end="2846">✅ Best Practices</h2>
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<p data-start="2850" data-end="2894">Use <strong data-start="2854" data-end="2876">Redis or Memcached</strong> for large apps.</p>
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<p data-start="2897" data-end="2935">Always use <code data-start="2908" data-end="2920">remember()</code> for queries.</p>
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<p data-start="2938" data-end="2982">Use <strong data-start="2942" data-end="2950">tags</strong> for grouped cache management.</p>
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<p data-start="2985" data-end="3019">Don&rsquo;t cache sensitive user data.</p>
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<p data-start="3022" data-end="3060">Flush only necessary cache, not all.</p>
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<h1 data-start="3067" data-end="3090">🔹 Example Use Case</h1>
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<p data-start="3095" data-end="3122">User visits <strong data-start="3107" data-end="3120">/products</strong></p>
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<p data-start="3126" data-end="3186">First request &rarr; Laravel queries DB &rarr; saves result in cache</p>
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<p data-start="3190" data-end="3234">Next requests &rarr; served from cache (faster)</p>
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<p data-start="3238" data-end="3312">When products are updated &rarr; <code data-start="3266" data-end="3293">Cache::forget('products')</code> clears old cache</p>
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