title: memcached check server is online
body: <p>I am using the <strong>memcached</strong> php extension, when you run <code>addServer</code> the documentation says no connection is established to the server, so if a memcached server goes down it would still get added.</p>
  
  <p>How can I check that the server is available? Using memcached and not memcache extension so I can't use <code>getServerStatus</code>.</p>