Facebook Graph API 3.1 – Requesting Extended Permissions for your Application

Facebook has added the app’s permissions to the user object, which can easily be accessed using Facebook Graph API and any specific permission is missing, you can request for it by redirecting user to the Facebook:

$app_id ='App ID here';
$app_secret ='App Secret here';
$app_url ='App URL here';
  
// Create our Application instance.
$facebook = new Facebook(array(
      'appId'  => $app_id,
      'secret' => $app_secret,
      'cookie' => true
    ));
	
$scope = 'email,offline_access,publish_stream,user_photos,create_event';
 
//make sure you leave no space after comma between permissions
		 
	$scope_params = explode(',',$scope);	
	 
	$permissions = $facebook->api("/me/permissions");

if(is_array($permissions)){
	
	$premissions_required = '';
	
	foreach($scope_params as $k){
	   
	 if(!array_key_exists($k, $permissions['data'][0])  )
	
	 $premissions_required .= $k.',';
	  
	   }

if( $premissions_required ) {
	
$premissions_required = substr($premissions_required, 0, -1);

$oauth_url = 'https://graph.facebook.com/oauth/authorize?client_id=' . $app_id . '&redirect_uri=' .$app_url . '&type=user_agent&display=page&scope=' . $premissions_required;

    echo '';
   } 
	

}

Hope that helps.

Cheers!