fbmain.php

<?php
  $fbconfig['appid']  = "your-application-id-here";
  $fbconfig['api']    = "your-application-api-key";
  $fbconfig['secret'] = "your-application-secrey-key";
  
  try
  {
    include_once "facebook.php";
  }
  catch( Exception $e )
  {
    d( $e );
  }
  
  // Create our application instance
  $facebook = new Facebook( array( 'appId' => $fbconfig['appid'], 'secret' => $fbconfig['secret'], 'cookie' => true ) );
  
  // We may or may not have this data based on a $_GET or $_COOKIE based session.
  // If we get a session here, it means we found a correctly signed session using 
  // the application secret only Facebook and the application knows. We don't know
  // if it is still valid until we make an API call using the session. A session
  // can become invalid if it has already expired (should not be getting the session
  // back in this scenario) or if the user logged out of FaceBook.
  $session = $facebook -> getSession();
  
  $fbMe = null;
  
  // Session based Graph API Call
  if( $session ) :
    try
    {
      $uid = $facebook -> getUser();
      $fbMe = $facebook -> api( '/me/' );
    }
    catch( FacebookApiException $e )
    {
      d( $e );
    }
  endif;
  
  function d( $error )
  {
    echo "<pre>" . print_r( $error ) . "</pre>";
  }
?>