title: What exactly am I supposed to do for OAuth 2.0 and https update?
body: <p>I am a php developer. I created an application using fbml(non iframe) and didn't check roadmap regularly.
  Today I received an email saying update to OAuth 2.0 and HTTPS by October 1st or the apps may be disabled.
  I went through the documentation but could not get what exactly I am supposed to do.</p>
  
  <p>From what I understood.
  for https
  we need to enable or buy ssl for our site and make <a href="https://example.com/facebookapps_folder/" rel="nofollow noreferrer">https://example.com/facebookapps_folder/</a> accessible and fill the new url in Secure Canvas URL
  Is that right?</p>
  
  <p>I am confused about OAuth 2.0.For this do we need to change the whole code and libraries we are referring to.
  Where can I get how do I change it.
  I see some php examples but could not find clue what needs to be changed?
  I think it is way authentication is being done, but I do I do that.</p>
  
  <p>If I fail to do it immediately(as only 3 days left) is that any way I can save my application being disabled?</p>