gistfile1.php

<?php
ob_start();
// Dirty hack for IE Iframe Cookie Problem
header('P3P: CP="ALL DSP LAW CUR DEVi PSAa CONi OUR IND PHY ONL UNI PUR COM CNT"');
include_once APPPATH .'libraries/facebook-php-sdk/src/facebook.php';

class Facebook_Client
{
	/**
	 *
	 * Facebook Client
	 * @var Object
	 */
	public $facebook;

	/**
	 * Access token of user
	 * @var string
	 */
	private $_accessToken;

	/**
	 * Facebook user id of user
	 * @var integer
	 */
	private $_uid;

	/**
	 * CodeIgniter Base Object
	 * @var object
	 */
	private $_CI;

	/**
	 * Configurations for Facebook Application
	 * @var array
	 */
	private $_config;
	
	public function  __construct() {

		$this->_CI =& get_instance();

		// Load CodeIgniter Configuration File
		$this->_CI->load->config('facebook', TRUE);
		$this->_config = $this->_CI->config->item('facebook');

		// Initialize facebook client
		$this->facebook = new Facebook($this->_config['application']);

		
	}

	/**
	 * Gets authentication url for application
	 * @param array $options
	 * @return string
	 */
	public function getLoginUrl($options = array())
	{
		$this->_config['auth']['fbconnect'] = 0;
		$this->_config['auth']['display'] = 'page';
		$this->_config['auth']['canvas'] = 1;
		$options = array_merge($this->_config['auth'], $options);
		return $this->facebook->getLoginUrl($options);
	}

	/**
	 * Gets active facebook user's uid, access token information
	 * @return array | bool
	 */
	public function getSession()
	{
		$session = $this->facebook->getSession();
		if($session)
		{
			/**
			 * TODO : Use setters in here
			 */
			$this->_accessToken = $session['access_token'];
			$this->_uid = $session['uid'];
			return $session;
		}

		return false;
	}

	/**
	 * Redirection to Facebook login page
	 * @param string $loginUrl
	 * @param bool $notDie
	 * @return void | string
	 */
	public function redirect($loginUrl = '')
	{
		if(empty($loginUrl))
			$loginUrl = $this->getLoginUrl();
		$output = sprintf("
			<script type=\"text/javascript\">
				top.location.href = '%s';
			</script>", $loginUrl);
		return $output;
		
	}

	/**
	 * Gets Facebook UID
	 * @return integer
	 */
	public function getUid()
	{
		return $this->_uid;
	}

	/**
	 * Gets access token
	 * @return string
	 */
	public function getAccessToken()
	{
		return $this->_accessToken;
	}






}