title: PHP: Detect and show "Server overloaded" message
body: <p>I have noticed a few websites such as <a href="http://hypem.com/" rel="nofollow">hypem.com</a> show a "You didnt get served" error message when the site is busy rather than just letting people wait, time out or refresh; aggravating what is probably a server load issue.</p>
  
  <blockquote>
    <p>We are too loaded to process your request. Please click "back" in your
    browser and try what you were doing again.</p>
  </blockquote>
  
  <p>How is this achieved before the server becomes overloaded? It sounds like a really neat way to manage user expectation if a site happens to get overloaded whilst also giving the site time to recover.</p>