I'm trying to implement facebook login for my website using facebook PHP-SDK with codeigniter by following this example: https://shareurcodes.com/blog/facebook%20php%20sdk%20v5%20with%20codeigniter
From what I have seen from other questions on this subject I checked for given answers/common mistakes but http://localhost/fbcallback
is already in my app's Valid OAuth redirect URIs and putting/removing '/' from the end of the url is not helping.
I created two controllers the first one: fblogin.php
<?php defined('BASEPATH') OR exit('No direct script access allowed');
class Fblogin extends CI_Controller{
public function index(){
require_once '{path}/Facebook/autoload.php';
$fb = new Facebook\Facebook([
'app_id' => '{app-id}',
'app_secret' => '{app-secret}',
'default_graph_version' => 'v2.5',
]);
$helper = $fb->getRedirectLoginHelper();
$permissions = ['email','user_location','user_birthday','publish_actions'];
// For more permissions like user location etc you need to send your application for review
$loginUrl = $helper->getLoginUrl('http://localhost/fbcallback', $permissions);
header("location: ".$loginUrl);
}
}
second one: fbcallback.php
<?php defined('BASEPATH') OR exit('No direct script access allowed');
class Fbcallback extends CI_Controller{
public function index(){
require_once '{path}/Facebook/autoload.php';
$fb = new Facebook\Facebook([
'app_id' => '{app-id}',
'app_secret' => '{app-secret}',
'default_graph_version' => 'v2.5',
]);
$helper = $fb->getRedirectLoginHelper();
if (isset($_GET['state'])) {
$helper->getPersistentDataHandler()->set('state', $_GET['state']);
}
try {
$accessToken = $helper->getAccessToken();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
try {
// Get the Facebook\GraphNodes\GraphUser object for the current user.
// If you provided a 'default_access_token', the '{access-token}' is optional.
$response = $fb->get('/me?fields=id,name,email,first_name,last_name,birthday,location,gender', $accessToken);
// print_r($response);
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'ERROR: Graph ' . $e->getMessage();
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'ERROR: validation fails ' . $e->getMessage();
exit;
}
// User Information Retrieval begins................................................
$me = $response->getGraphUser();
$location = $me->getProperty('location');
echo "Full Name: ".$me->getProperty('name')."<br>";
echo "First Name: ".$me->getProperty('first_name')."<br>";
echo "Last Name: ".$me->getProperty('last_name')."<br>";
echo "Gender: ".$me->getProperty('gender')."<br>";
echo "Email: ".$me->getProperty('email')."<br>";
echo "location: ".$location['name']."<br>";
echo "Birthday: ".$me->getProperty('birthday')->format('d/m/Y')."<br>";
echo "Facebook ID: <a href='https://www.facebook.com/".$me->getProperty('id')."' target='_blank'>".$me->getProperty('id')."</a>"."<br>";
$profileid = $me->getProperty('id');
echo "</br><img src='//graph.facebook.com/$profileid/picture?type=large'> ";
echo "</br></br>Access Token : </br>".$accessToken;
}
}
When I go to http://localhost/fblogin
it asks for necessary permissions (email, user location, user birthday , publish actions) but after I give the permissions and redirected to http://localhost/fbcallback
I get the following error:
Graph returned an error: Error validating verification code. Please make sure your redirect_uri is identical to the one you used in the OAuth dialog request.
While I was playing around i realised if I change $loginUrl
variables in
vendor/facebook/graph-sdk/src/Facebook/Authentication/OAuth2Client.php to http://localhost/fbcallback
as shown below everything works as intended. So I suspected maybe there is a problem while passing the $loginUrl parameter, and traced my code but couldn't find anything problematic.
public function getAuthorizationUrl($loginUrl, $state, array $scope = [], array $params = [], $separator = '&')
{
$params += [
'client_id' => $this->app->getId(),
'state' => $state,
'response_type' => 'code',
'sdk' => 'php-sdk-' . Facebook::VERSION,
'redirect_uri' => 'http://localhost/fbcallback', //instead of {$redirectUrl}
'scope' => implode(',', $scope)
];
What really got me confused is if I change DocumentRoot of my server and copy the above two controllers with the facebook-sdk library everything works just fine again in the new directory. So maybe there is a conflict with one of the files in the current directory? I searched for it but couldn't find anything that may conflict.
Thanks in advance!