Sharing how I implemented Facebook SDK V4 on Laravel 4.
Here's what I added on default composer.json
"autoload": {
"classmap": [
"app/commands",
"app/controllers",
"app/models",
"app/database/migrations",
"app/database/seeds",
"app/tests/TestCase.php"
],
"psr-4" : {
"Facebook\\":"vendor/facebook/php-sdk-v4/src/Facebook/"
}
},
Added Facebook initialization on my index.php, like this :
/*
|--------------------------------------------------------------------------
| Initialized Facebook PHP SDK V4
|--------------------------------------------------------------------------
|
*/
//Initialize
use Facebook\FacebookSession;
FacebookSession::setDefaultApplication(Config::get('facebook.AppId'),Config::get('facebook.AppSecret'));
And for the Session, Laravel doesn't use $_SESSION so you don't need to do session_start at all. For you to be able to use Laravel session on Facebook PHP SDK V4, you need to extend Facebook's FacebookRedirectLoginHelper class.
Here's how how to subclass FacebookRedirectLoginHelper and overwrite Session handling.
class LaravelFacebookRedirectLoginHelper extends \Facebook\FacebookRedirectLoginHelper
{
protected function storeState($state)
{
Session::put('state', $state);
}
protected function loadState()
{
$this->state = Session::get('state');
return $this->state;
}
protected function isValidRedirect()
{
return $this->getCode() && Input::has('state')
&& Input::get('state') == $this->state;
}
protected function getCode()
{
return Input::has('code') ? Input::get('code') : null;
}
//Fix for state value from Auth redirect not equal to session stored state value
//Get FacebookSession via User access token from code
public function getAccessTokenDetails($app_id,$app_secret,$redirect_url,$code)
{
$token_url = "https://graph.facebook.com/oauth/access_token?"
. "client_id=" . $app_id . "&redirect_uri=" . $redirect_url
. "&client_secret=" . $app_secret . "&code=" . $code;
$response = file_get_contents($token_url);
$params = null;
parse_str($response, $params);
return $params;
}
}
And one more step, you need to do a composer command to regenerate autoload files :
composer dump-autoload -o
Ok, if all goes right, you are now ready to start using the SDK, here's a sample
Here's an excerpt from one of my project classes :
namespace Fb\Insights;
//Facebook Classes
use Facebook\FacebookSession;
use Facebook\FacebookRequest;
use Facebook\FacebookSDKException;
//Our Facebook Controller
use FbController;
class PagePosts extends \Facebook\GraphObject {
/*
Get Page Posts Impression
https://developers.facebook.com/docs/graph-api/reference/v2.0/insights#post_impressions
*/
public static function getPagePostsImpressions($postid = null) {
$fbctrl = new FbController();
$metricNames = array(
'post_impressions',
'post_impressions_unique',
'post_impressions_paid',
'post_impressions_paid_unique',
'post_impressions_fan',
'post_impressions_fan_unique',
'post_impressions_fan_paid',
'post_impressions_fan_paid_unique',
'post_impressions_organic',
'post_impressions_organic_unique',
'post_impressions_viral',
'post_impressions_viral_unique',
'post_impressions_by_story_type',
'post_impressions_by_story_type_unique',
'post_impressions_by_paid_non_paid',
'post_impressions_by_paid_non_paid_unique'
);
$postsInsights = array();
$batch = array();
$limit = $fbctrl->FacebookGraphDateLimit();
//craft our batch API call
for($i=0; $i<count($metricNames); $i++) {
$batch[] = json_encode(array('method' => 'GET','relative_url' => $postid . '/insights/' . $metricNames[$i] . '?since=' . $limit['since'] . '&until=' . $limit['until'] ));
}
$params = array( 'batch' => '[' . implode(',',$batch ) . ']' );
$session = new FacebookSession($fbctrl->userAccessToken);
try {
$res = (new FacebookRequest($session,'POST','/',$params))
->execute()
->getGraphObject();
} catch(FacebookRequestException $ex) {
//log this error
echo $ex->getMessage();
} catch(\Exception $ex) {
//log this error
echo $ex->getMessage();
}
//Collect data
for($i=0; $i<count($batch); $i++) {
$resdata = json_decode(json_encode($res->asArray()[$i]),true);
$fbctrl->batchErrorDataChecker($resdata,$postsInsights,$metricNames[$i]);
}
return $postsInsights;
}
Feel free comment or suggest so I can also improve my code.
Happy coding.