title: is the expiration time updated in memcached after an increment?
body: <p>When you put a value in memcached, you can set an expiration time.</p>
  
  <p>However, when you increment a value you can not (at least not from <a href="http://php.net/manual/en/memcache.increment.php" rel="noreferrer">PHP</a>) set a new expiration time.</p>
  
  <p>My question: Is the expiration time reset on increment to it's initial value? Or it it unchanged? Or is there another way to regenerate the expiration time?</p>
  
  <p>Both the memcache documentation is vague about this, as well as the PHP documentation</p>