Facebook App recoread object instantiation

facebookapp_2.php

class fbrecoread{
<?php
     /* Private variables and Constants */
     const APP_ID = '212318288788000';
     const APP_SECRET = '7ae17a52b5f43df287327293644ff364';
     private $fb = null; 
     private $session = null;

     public function __construct($args = array()){
         // Create our Application instance (replace this with your appId and secret).
         $this->fb = new Facebook(array(
           'appId'  => self::APP_ID,
           'secret' => self::APP_SECRET,
           'cookie' => true,
         ));
         if(!$this->fb){
             echo "Unable to instantiate Facebook SDK";
             exit;
         }
      }
?>