title: cakephp - why do some changes NOT happen until I switch debugging to 3?
body: <p>Sometime I will implement changes locally and they work fine, I copy them to my remote webserver and the changed are ignored. (The code is identical.)</p>
  
  <p>I go into core.php, change debugging to 3, check again... it works!</p>
  
  <p>I have a feeling it's something to do with cache but I don't know what exactly to change.</p>