title: Is Graph API 2.x necessary to upgrade facebook php sdk from version 3.2.3 to 4.0.0
body: <p>With Facebook Upgrading to Graph API 2.x and the New Facebook Login.</p>
  
  <p>Is it necessary to upgrade Facebook php SDK 3.2.3 to 4.0.0? </p>
  
  <p>If it is not, how can I make change for Graph API 2.x base on PHP SDK 3.2.3?</p>
  
  <p>Thank you,</p>
  
  <p>Griffin</p>