title: Laravel 4 clear all expired cache
body: <p>In Laravel, we can store cache with this:</p>
  
  <pre><code>Cache::put($dynamickey, 'value', $minutes);
  </code></pre>
  
  <p>But this will end up more and more cache files stored even after it is expired. If we try to clean it with <code>php artisan cache:clear</code> or <code>Cache::flush();</code>, it will wipe out all the cache including those that are still valid.</p>
  
  <p>Is it possible to have auto clean up that will clear only expired cache? Thanks.</p>