title: How to host multiple Facebook Apps using a single domain and SSL certificate
body: <p>Good evening to all users of StackOverflow,
  I would like to find help in a complex question now. Install applications on Facebook (Minisites in php, flash, html5, etc. ..) my question is:
  I need only one domain with ssl certificate? or buy multiple certificates for each of the microsites?
  Just this: <a href="https://www.nomedominio.com/esempio" rel="nofollow">https://www.nomedominio.com/esempio</a>
  or: <a href="https://esempio.nomedominio.com" rel="nofollow">https://esempio.nomedominio.com</a>
  Thanks for your help. Greetings Mimmo.</p>