title: What does the shmop PHP extension do?
body: <p><a href="http://www.php.net/manual/en/intro.shmop.php" rel="noreferrer">http://www.php.net/manual/en/intro.shmop.php</a></p>
  
  <blockquote>
    <p>Shmop is an easy to use set of functions that allows PHP to read,
    write, create and delete Unix shared memory segments.</p>
  </blockquote>
  
  <p>I don't understand, what exactly is the purpose of this extension? What is it used for?</p>