title: Can I send private message to my users using PHP Facebook SDK?
body: <p>I would create a Facebook application and I need to know if I can send private message to the users have joined my application. Is this possible?</p>
  
  <p><em>Note: I only would like to send messages <strong>TO MY</strong> users and <strong>NOT</strong> to the friends of my users (I think this is not possible for spam reason...right?).</em></p>