title: codeigniter output cache doesn't work?
body: <p>I'm using <code>$this-&gt;output-&gt;cache(n)</code> to cache webpage, but i cannot figure out how does it work.. I didn't find any cache files under <code>system/cache</code> folder...and also after I edit the page and show it again, the content changes, so it seems that the page is not really cached. Can anyone give a help?  (i'm using phil's template lib)
  my code: </p>
  
  <pre><code>function show(){
  
      $this-&gt;output-&gt;cache(5);
  
      $this-&gt;load-&gt;model('page_model');
      $var = $this-&gt;uri-&gt;segment(3, 0); //get About page
      $row = $this-&gt;page_model-&gt;getPage($var);
      $this-&gt;template-&gt;title('about')
                     -&gt;set_layout('default')
                     -&gt;set_partial('styles', 'css')
                     -&gt;set('data', $row-&gt;body)
                     -&gt;build('about');
  
  }
  </code></pre>
  
  <p>THANKS!</p>