title: PHP APC, educate me
body: <p>I'm currently implementing memcached into my service but what keeps cropping up is the suggestion that I should also implement APC for caching of the actual code.</p>
  
  <p>I have looked through the few tutorials there are, and the <a href="http://uk3.php.net/apc/" rel="noreferrer">PHP documentation</a> as well, but my main question is, how do I implement it on a large scale? PHP documentation talks about storing variables, but it isn't that detailed.</p>
  
  <p>Forgive me for being uneducated in this area but I would like to know where in real sites this is implemented. Do I literally cache everything or only the parts that are used often, such as functions?</p>
  
  <p>Thanks!</p>