How to use Facebook PHP SDK v.3.0.0 with Codeigniter?

Written by msnisha

Topics: Codeigniter

There is some changes has been done in the Facebook PHP SDK v.3.0.0. There is no more method named as getSession. So if you have updated to the new Fecebook PHP SDK then you might have to modify your Codeigniter Facebook connect library.

You can follow these simple steps to have a working Codeigniter Facebook library.

  1. Create a Config file in application/facebook.php with the following code in it.
    2. $config['appId'] = 'Your Facebook App ID';
$config['secret'] = 'Your secret Code';
  2. There is two files provided starting from V.3.0.0 of Facebook PHP SDK. Create a folder in application library and name it as facebook.
  3. Download the Facebook PHP SDK files and place it in the folder application/library/facebook. You can download it from https://github.com/facebook/php-sdk
  4. Create a new file and name it as fb_connect.php in application/library and copy the following code inside that folder.  
    <?php
	include(APPPATH.'libraries/facebook/facebook.php');

	class Fb_connect extends Facebook{

		//declare public variables
		public 	$user 			= NULL;
		public 	$user_id 		= FALSE;

		public $fb 			= FALSE;
		public $fbSession	= FALSE;
		public $appkey		= 0;

		//constructor method.
		public function __construct()
		{
                    $CI = & get_instance();
                    $CI->config->load("facebook",TRUE);
                    $config = $CI->config->item('facebook');
                    parent::__construct($config);
                    $this->user_id = $this->getUser(); // New code

                    $me = null;
                    if ($this->user_id) {
                        try {
                            $me = $this->api('/me');
                            $this->user = $me;
                            } catch (FacebookApiException $e) {
                                error_log($e);
                            }
			}
		} 

	} // end class

Now create a Controller and name it as user, and write the following methods in it.

  

	function loginByFacebook(){
        	$this->load->library('fb_connect');
	        $param['redirect_uri']=site_url("user/facebook");
	        redirect($this->fb_connect->getLoginUrl($param));
	}

	function facebook() {
	        $this->load->library('fb_connect');
	        if (!$this->fb_connect->user_id) {
	            //Handle not logged in,
	        } else {
	           $fb_uid = $this->fb_connect->user_id;
	           $fb_usr = $this->fb_connect->user;
	           //Hanlde user logged in, you can update your session with the available data
        	   //print_r($fb_usr) will help to see what is returned
	        }
	}


 


 


That is all about the coding now when ever you need to login with facebook just redirect to user/loginByFacebook and your login will handled automatically by Facebook. But you need to update the facebook() method with the actions success and failure conditions.

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Posted on 6 June 2011

37 Comments For This Post I'd Love to Hear Yours!

  1. msnisha says:
    June 11, 2011 at 7:51 PM

    It worked for me. Please try all steps or send me ur code I can help in debug.

    Reply
  2. Pavan says:
    June 20, 2011 at 11:16 AM

    It worked. Thank you

    Reply
  3. Gerard Nijboer says:
    June 20, 2011 at 2:17 PM

    Hi!

    I’ll give this a try.

    Perhaps you could provide a zip file with all the files you mention to create, so that we can just drag and drop into the application folder, think about it.

    Will come back after trying.

    Reply
  4. Ben says:
    June 20, 2011 at 7:33 PM

    Got it working now, is there any way to post to a user’s wall?

    Reply
  5. niksam says:
    June 21, 2011 at 2:06 PM

    can you provide full source code ?

    Codeigniter 2.0 with facebook sdk 3.0.1 ?

    Reply
  6. msnisha says:
    June 21, 2011 at 8:41 PM

    Yes. Please download it from the post How to post on user’s wall on Facebook?

    Reply
  7. David Rosendo says:
    June 30, 2011 at 5:06 PM

    Having a error showing up:
    Great Help your tutorial!

    Im getting the following error:
    Fatal error: Call to undefined function site_url() in /home/xpto/public_html/f6/application/controllers/user.php on line 33

    Any help?

    Is there a View File? for the views Folder?

    Also, how can I bypass the install app feature and instead show the Popup one…?

    Reply
  8. msnisha says:
    June 30, 2011 at 8:31 PM

    I forget to mention that, you will have to load the url helper to get the function. I have done it in the auto-load config file. I think this is the preferred method is to redirect user to facebook login screen then it will work fine in all device.

    Any way if you need a popup please follow this to display the login button.
    <fb:login-button autologoutlink="true" perms="email,user_birthday,status_update,publish_stream"></fb:login-button>
    This will open the popup window. But please make sure facebook javascript loaded in the starting of the page.

    Reply
  9. Paul says:
    July 8, 2011 at 3:43 PM

    Great tutorial!

    I used the files you provided above and I’m having a 404 error after redirection. here is the URL:

    http://www.example.com/user/facebook?code=T9zzwlj-BbmtodaClZMKtnXe2NVbupJtp33laKTCa84.eyJpdiI6IkR6bzhiRVpndGtiSzlteUZmaHVGc2cifQ.qt6-lw7LW30dE0eWnqaSeJFYopOExhzI1PtUHRBOYzmjGlPkTKg5O21U5lvbstB3-LeKdxWdPAzKmqwdlrCtdCZE_MfS_E5GPhzdzlQo7Dv_yAYutLlUZPsNXLzcgcaE&state=abb490bf6a24cc048ddfd1f2b1de036e

    Can you please give me a fix on this?

    Thanks.

    Reply
  10. markus says:
    July 15, 2011 at 10:37 AM

    can you please provide the info in your email to me too?

    Reply
  11. msnisha says:
    August 7, 2011 at 6:24 PM

    Please check your email.

    Reply
  12. tiktak31 says:
    August 21, 2011 at 9:41 AM

    wow this is awsome… thnks very much..

    Reply
  13. Duncan says:
    August 22, 2011 at 4:45 PM

    I’m having some trouble that’s got me pulling out my hair:

    On my local machine and on the testing machine which is on Godaddy it all works fine, but on production – which is also godaddy – the returned facebook user is always null:

    object(Fb_connect)#21 (13) {
    ["user"]=> int(0)
    ["user_id"]=> int(0)
    ["fbLoginURL"]=> string(197) “https://www.facebook.com/dialog/oauth?client_id=xxxx&redirect_uri=http%3A%2F%2Fwww.ultimatedreamteams.com%2Fbracketchallenge%2Fusers%2Fsave_fb_user&state=xxxx”
    ["fbLogoutURL"]=> string(0) “” ["fb"]=> bool(false)
    ["fbSession"]=> bool(false)
    ["appkey"]=> int(0)
    ["appId:protected"]=> string(15) “xxxx”
    ["apiSecret:protected"]=> string(32) “xxxx”
    ["signedRequest:protected"]=> NULL
    ["state:protected"]=> string(32) “xxxx”
    ["accessToken:protected"]=> string(48) “xxxx|xxxx”
    ["fileUploadSupport:protected"]=> bool(false)
    }

    There is some config difference on this server as I had to add a ‘?’ to my .htaccess rule (index.php?/ instead of index.php/) for CI to work. I’ve tried all sorts of config variations for uri_protocol but it the FB user is always 0.

    I just can’t figure out where the problem is. Any ideas? Or at least how I can trouble shoot?

    The production url is: http://www.ultimatedreamteams.com/bracketchallenge/home

    Reply
  14. Duncan says:
    August 22, 2011 at 7:17 PM

    SOLVED:

    Add this to controller functions that use FB_connect:

    parse_str(substr(strrchr($_SERVER['REQUEST_URI'], “?”), 1), $_REQUEST);

    Whatever it is that requires the ‘?’ added to the .htacess rule messes up $_REQUEST. I had tried the above with $_GET which didn’t work as the FB api uses $_REQUEST

    Reply
  15. Marko says:
    August 25, 2011 at 4:56 PM

    I followed your tutorial and after loginbyfacebook i got blank page, vever getting into facebook method.I noticed “?” in url thinking it may have caused problems, but i dont know the workaround. Please help

    Reply
  16. Abdun Nur Tomal says:
    August 25, 2011 at 8:24 PM

    I have an error message – below

    Fatal error: Uncaught exception ‘Exception’ with message ‘Facebook needs the CURL PHP extension.’ in C:xampplitehtdocshsdapplicationlibrariesfacebookbase_facebook.php:19 Stack trace: #0 C:xampplitehtdocshsdapplicationlibrariesfacebookfacebook.php(18): require_once() #1 C:xampplitehtdocshsdapplicationlibrariesfb_connect.php(2): include(‘C:xamppliteht…’) #2 C:xampplitehtdocshsdsystemcoreLoader.php(824): include_once(‘C:xamppliteht…’) #3 C:xampplitehtdocshsdsystemcoreLoader.php(100): CI_Loader->_ci_load_class(‘fb_connect’, NULL, NULL) #4 C:xampplitehtdocshsdapplicationcontrollersuser.php(55): CI_Loader->library(‘fb_connect’) #5 C:xampplitehtdocshsdapplicationcontrollersuser.php(10): User->loginByFacebook() #6 [internal function]: User->index() #7 C:xampplitehtdocshsdsystemcoreCodeIgniter.php(339): call_user_func_array(Array, Array) #8 C:xampplitehtdocshsdindex.php(201): require_once(‘C:xamppliteht…’) #9 {main} thrown in C:xampplitehtdocshsdapplicationlibrariesfacebookbase_facebook.php on line 19

    Reply
  17. Patrick De Amorim says:
    September 5, 2011 at 12:34 AM

    So far this script seems to be great, it does show me the information I expect to get.

    But one thing I wonder, where can I add more information which I would like to get from the user?

    For example:
    ‘scope’ => ‘publish_stream,user_birthday,user_location,user_about_me, user_photos’,

    Reply
  18. Patrick De Amorim says:
    September 5, 2011 at 1:52 AM

    Forget my last comment, I figured it out, was simple, hehe.

    But one other thing I wonder, is how do I run FQLs like this?

    try{
    $fql = “select name, birthday_date, sex, about_me, name, current_location, email, uid from user where uid=” . $user;
    $param = array(
    ‘method’ => ‘fql.query’,
    ‘query’ => $fql,
    ‘callback’ => ”
    );
    $fqlResult = $facebook->api($param);
    }

    Reply
  19. Wondering Coder says:
    October 25, 2011 at 9:48 AM

    Sorry for asking this, I’m just starting to learn about mobile application.
    Just want to clarify about this:
    Create a Config file in application/facebook.php with the following code in it.
    Source code

    $config['appId'] = ‘Your Facebook App ID’;
    $config['secret'] = ‘Your secret Code’;

    do you mean I will create a facebook.php under the application folder? And in that php file those 2 lines of codes will be included?
    e.g
    <?php
    $config['appId'] = 'Your Facebook App ID';
    $config['secret'] = 'Your secret Code';

    please reply. thanks you in advance

    Reply
  20. Jason says:
    November 21, 2011 at 3:54 AM

    Hi,

    My application has a problem. I can’t get the user data. Could you please help me to take a look?

    controller action:
    function test()
    {
    $data['title'] = ‘Facebook API Testing’;

    $data['user_id'] = $this->fb_connect->user_id;
    if($data['user_id'])
    {
    $data['user_profile'] = $this->fb_connect->user;
    }
    if($data['user_id'])
    {
    $data['logout_url'] = $this->fb_connect->getLogoutUrl();;
    }
    else
    {
    $data['login_url'] = $this->fb_connect->getLoginUrl();
    }

    $this->template->load(‘template’, ‘facebook_connect/test’, $data);
    }

    view file:
    php-sdk

    <a href="”>Logout

    Login using OAuth 2.0 handled by the PHP SDK:
    <a href="”>Login with Facebook

    PHP Session

    Your Avata
    <img src="https://graph.facebook.com//picture“>

    Your User Object (/me)

    You are not Connected.

    Thanks.

    Reply
  21. Josh says:
    December 17, 2011 at 2:40 AM

    This looks great! Thanks for the tips, but when I go to user/facebook it takes me to a facebook page that says an error occured, try again later. The info in the url looks like it has the correct redirect_uri any ideas what I’m doing wrong? Thanks!

    Reply
  22. msnisha says:
    December 17, 2011 at 5:54 PM

    Have you changed the configuration details to match with your URL and api key?

    Reply
  23. stuman says:
    February 26, 2012 at 6:49 AM

    Thanks for the tutorial!
    But how can i access user’s friends data (i.e friends’ names) ?

    thanks

    Reply
  24. Johnson says:
    June 16, 2012 at 2:31 AM

    Hi, nice tutorial. Works well for me.

    But how do I get the access token when a user logs in?

    Reply
  25. Emrah says:
    July 10, 2012 at 2:23 PM

    its working. thank you for this tutorial.
    my ci ver: 2.1.2

    Reply
  26. sp says:
    August 11, 2012 at 9:41 AM

    A PHP Error was encountered

    Severity: Warning

    Message: include(application/libraries/facebook/facebook.php) [function.include]: failed to open stream: No such file or directory

    Filename: libraries/fb_connect.php

    Line Number: 2

    Reply

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