I have problems accessing my Facebook site.
I created a login using the Facebook SDK following the training course at developers.facebook.com, but it does not work for me.
I wrote a simple test page to find out what went wrong. This is the code:
<!DOCTYPE html> <html> <head></head> <body> <pre> <?php $app_id = '446458238729594'; $app_secret = '********'; $redirect_uri = 'http://mysite.localhost/'; try { echo( 'Including "facebook.php"...' ); require './src/facebook.php'; echo( "done.\n\n" ); echo( 'Starting session...' ); $result = session_start(); if( $result ) { echo( "done.\n\n" ); echo( "\n=====>>>>> Session array:\n" . var_export( $_SESSION, true ) . "\n\n" ); } else { echo( "fail.\n\n" ); echo( "\n=====>>>>> Session array:\n" . var_export( $_SESSION, true ) . "\n\n" ); } echo( "Trying to get counter from the session...\n"); if( isset( $_SESSION['counter'] ) ) { echo( 'Value: ' . $_SESSION['counter'] . "\n" ); echo( "Increasing to one...\n"); $_SESSION['counter']++; echo( "done.\n" ); echo( 'Value: ' . $_SESSION['counter'] . "\n\n" ); } else { echo( "fail.\n" ); echo( "Trying to add a counter and set it value to 0...\n"); $_SESSION['counter'] = 0; echo( 'Value: ' . $_SESSION['counter'] . "\n" ); echo( "done.\n\n" ); } echo( 'Creating an instance of Facebook class...' ); $facebook = new Facebook( array( 'appId' => $app_id, 'secret' => $app_secret, ) ); echo( "done.\n\n" ); echo( "The instance of Facebook class:\n" . str_replace( $app_secret, '>>>APP_SECRET<<<', var_export( $facebook, true ) ) . "\n\n" ); echo( "\n=====>>>>> Session array:\n" . var_export( $_SESSION, true ) . "\n\n" ); echo( 'Trying to get user ID...' ); $user_id = $facebook->getUser(); echo( "done.\n\n" ); echo( "User ID:\n" . var_export( $user_id, true ) . "\n\n" ); echo( "\n=====>>>>> Session array:\n" . var_export( $_SESSION, true ) . "\n\n" ); echo( 'Trying to get user profile info...' ); try { $user_profile = $facebook->api( '/me' ); echo( "done.\n\n" ); echo( "User profile info:\n" . var_export( $user_profile, true ) . "\n\n" ); } catch( Exception $exception ) { echo( "fail. Probably user is not logged in.\n\n" ); echo( "Exception:\n--------\n" . str_replace( $app_secret, '>>>APP_SECRET<<<', var_export( $exception, true ) ) . "\n--------\n\n" ); $user_id = null; echo( "User ID is now NULL.\n\n" ); } echo( "\n=====>>>>> Session array:\n" . var_export( $_SESSION, true ) . "\n\n" ); if( $user ) { echo( 'Seems like user is logged in. Getting logout url...' ); $url = $facebook->getLogoutUrl(); echo( "done.\n\n" ); } else { echo( 'Seems like user is NOT logged in. Getting login url...' ); $url = $facebook->getLoginUrl( array( 'scope' => 'read_stream, publish_stream, user_birthday,' . ' user_location, user_work_history, user_hometown,' . ' user_photos', 'redirect_uri' => $redirect_uri, ) ); echo( "done.\n\n" ); } echo( 'URL:<br></pre><a href=' . $url .">Login / Logout</a><pre>\n\n" ); echo( "\n=====>>>>> Session array:\n" . var_export( $_SESSION, true ) . "\n\n" ); if( $user ) { echo( 'Seems like user is still logged in. Trying to get some profile' . ' info...' ); echo( "\nCreating request...\n" ); $queries = array( array( 'method' => 'GET', 'relative_url' => '/' . $user, ), array( 'method' => 'GET', 'relative_url' => '/' . $user . '/home?limit=50', ), array( 'method' => 'GET', 'relative_url' => '/' . $user . '/friends', ), array( 'method' => 'GET', 'relative_url' => '/' . $user . '/photos?limit=6', ), ); echo( "Request:\n\n" . var_export( $queries, true ) . "\n\n" ); echo( "\nEncoding request using JSON format...\n" ); $queries_encoded = json_encode( $queries ); echo( "Encoded request:\n\n" . var_export( $queries_encoded, true ) . "\n\n" ); try { echo( "\nTrying to get response...\n" ); $response = $facebook->api( '?batch=' . $queries_encoded, 'POST' ); echo( "Response:\n\n" . var_export( $response, true ) . "\n\n" ); echo( "\nTrying to decode response...\n" ); echo( "\n" . json_decode( $response[0]['body'], true ) . "\n" ); echo( "\n" . json_decode( $response[1]['body'], true ) . "\n" ); echo( "\n" . json_decode( $response[2]['body'], true ) . "\n" ); echo( "\n" . json_decode( $response[3]['body'], true ) . "\n" ); echo( "\n\ndone.\n\n" ); } catch( Exception $exception ) { echo( "fail.\n\n" ); echo( "Exception:\n--------\n\n" . str_replace( $app_secret, '>>>APP_SECRET<<<', var_export( $exception, true ) ) . "\n--------\n\n" ); } } else { echo( 'Seems like user is still NOT logged in. At now we can\'t do' . ' anything. Try to login using the URL above.' ); } echo( "\n\n========\n\nSession array:\n" . var_export( $_SESSION, true ) . "\n\n" ); } catch( Exception $exception ) { echo( "\n\n\nAn exception have been trown:\n--------\n\n" . str_replace( $app_secret, '>>>APP_SECRET<<<', var_export( $exception, true ) ) . "\n--------\n\n" ); echo( "\n\n========\n\nSession array:\n" . var_export( $_SESSION, true ) . "\n\n" ); } ?> </pre> </body> </html>
After the first visit to this page (I have not logged in to Facebook), I get this output:
Including "facebook.php"...done. Starting session...done. =====>>>>> Session array: array ( ) Trying to get counter from the session... fail. Trying to add a counter and set it value to 0... Value: 0 done. Creating an instance of Facebook class...done. The instance of Facebook class: Facebook::__set_state(array( 'sharedSessionID' => NULL, 'appId' => '446458238729594', 'appSecret' => '>>>APP_SECRET<<<', 'user' => NULL, 'signedRequest' => NULL, 'state' => NULL, 'accessToken' => NULL, 'fileUploadSupport' => false, 'trustForwarded' => false, )) =====>>>>> Session array: array ( 'counter' => 0, ) Trying to get user ID...done. User ID: 0 =====>>>>> Session array: array ( 'counter' => 0, ) Trying to get user profile info...fail. Probably user is not logged in. Exception: -------- FacebookApiException::__set_state(array( 'result' => array ( 'error_code' => 7, 'error' => array ( 'message' => 'Failed to connect to 2a03:2880:2050:1f01:face:b00c:0:2: Network is unreachable', 'type' => 'CurlException', ), ), 'message' => 'Failed to connect to 2a03:2880:2050:1f01:face:b00c:0:2: Network is unreachable', 'string' => '', 'code' => 7, 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 967, 'trace' => array ( 0 => array ( 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 899, 'function' => 'makeRequest', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => 'https://graph.facebook.com/me', 1 => array ( 'method' => 'GET', 'access_token' => '446458238729594|>>>APP_SECRET<<<', ), ), ), 1 => array ( 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 866, 'function' => '_oauthRequest', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => 'https://graph.facebook.com/me', 1 => array ( 'method' => 'GET', ), ), ), 2 => array ( 'function' => '_graph', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => '/me', ), ), 3 => array ( 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 644, 'function' => 'call_user_func_array', 'args' => array ( 0 => array ( 0 => Facebook::__set_state(array( 'sharedSessionID' => NULL, 'appId' => '446458238729594', 'appSecret' => '>>>APP_SECRET<<<', 'user' => 0, 'signedRequest' => NULL, 'state' => NULL, 'accessToken' => '446458238729594|>>>APP_SECRET<<<', 'fileUploadSupport' => false, 'trustForwarded' => false, )), 1 => '_graph', ), 1 => array ( 0 => '/me', ), ), ), 4 => array ( 'file' => '/srv/www/htdocs/mysite/web/index.php', 'line' => 69, 'function' => 'api', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => '/me', ), ), ), 'previous' => NULL, )) -------- User ID is now NULL. =====>>>>> Session array: array ( 'counter' => 0, ) Seems like user is NOT logged in. Getting login url...done. URL: Login / Logout =====>>>>> Session array: array ( 'counter' => 0, 'fb_446458238729594_state' => '84260edcd60940884d261812496a488c', ) Seems like user is still NOT logged in. At now we can't do anything. Try to login using the URL above. ======== Session array: array ( 'counter' => 0, 'fb_446458238729594_state' => '84260edcd60940884d261812496a488c', )
Then I try to login using this URL. This brings me to my Facebook application authorization page. After confirming the requested permissions, it redirects me to this URL:
http://mysite.localhost/?state=84260edcd60940884d261812496a488c&code=AQDkHPlXXweEiTjXg-sUXwwQAy0_xRYc89Opfz6AF9dlGOomCSG7fjf0440ctHuADKMEG4P7CheeNx9PnwUta-jkfpm03MjDCKyieOZpIPG-evlKYm64mRxD2Q5f_-HJROIC9I_-lHswr5RT3huSQySA55pD28b07Ouv87NqihZ1brGfU-_0LyhcdldtNikb-2xn6NRpa17xEmU37pBqDV1r
After that, I expect that I will log in and my page will load and show me some information from my Facebook profile, but it is not. I get this output:
Including "facebook.php"...done. Starting session...done. =====>>>>> Session array: array ( 'counter' => 0, 'fb_446458238729594_state' => '84260edcd60940884d261812496a488c', ) Trying to get counter from the session... Value: 0 Increasing to one... done. Value: 1 Creating an instance of Facebook class...done. The instance of Facebook class: Facebook::__set_state(array( 'sharedSessionID' => NULL, 'appId' => '446458238729594', 'appSecret' => '>>>APP_SECRET<<<', 'user' => NULL, 'signedRequest' => NULL, 'state' => '84260edcd60940884d261812496a488c', 'accessToken' => NULL, 'fileUploadSupport' => false, 'trustForwarded' => false, )) =====>>>>> Session array: array ( 'counter' => 1, 'fb_446458238729594_state' => '84260edcd60940884d261812496a488c', ) Trying to get user ID...done. User ID: 0 =====>>>>> Session array: array ( 'counter' => 1, ) Trying to get user profile info...fail. Probably user is not logged in. Exception: -------- FacebookApiException::__set_state(array( 'result' => array ( 'error_code' => 7, 'error' => array ( 'message' => 'Failed to connect to 2a03:2880:2050:1f01:face:b00c:0:2: Network is unreachable', 'type' => 'CurlException', ), ), 'message' => 'Failed to connect to 2a03:2880:2050:1f01:face:b00c:0:2: Network is unreachable', 'string' => '', 'code' => 7, 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 967, 'trace' => array ( 0 => array ( 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 899, 'function' => 'makeRequest', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => 'https://graph.facebook.com/me', 1 => array ( 'method' => 'GET', 'access_token' => '446458238729594|>>>APP_SECRET<<<', ), ), ), 1 => array ( 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 866, 'function' => '_oauthRequest', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => 'https://graph.facebook.com/me', 1 => array ( 'method' => 'GET', ), ), ), 2 => array ( 'function' => '_graph', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => '/me', ), ), 3 => array ( 'file' => '/srv/www/htdocs/mysite/web/src/base_facebook.php', 'line' => 644, 'function' => 'call_user_func_array', 'args' => array ( 0 => array ( 0 => Facebook::__set_state(array( 'sharedSessionID' => NULL, 'appId' => '446458238729594', 'appSecret' => '>>>APP_SECRET<<<', 'user' => 0, 'signedRequest' => NULL, 'state' => NULL, 'accessToken' => '446458238729594|>>>APP_SECRET<<<', 'fileUploadSupport' => false, 'trustForwarded' => false, )), 1 => '_graph', ), 1 => array ( 0 => '/me', ), ), ), 4 => array ( 'file' => '/srv/www/htdocs/mysite/web/index.php', 'line' => 69, 'function' => 'api', 'class' => 'BaseFacebook', 'type' => '->', 'args' => array ( 0 => '/me', ), ), ), 'previous' => NULL, )) -------- User ID is now NULL. =====>>>>> Session array: array ( 'counter' => 1, ) Seems like user is NOT logged in. Getting login url...done. URL: Login / Logout =====>>>>> Session array: array ( 'counter' => 1, 'fb_446458238729594_state' => '6ae5ea9e5f7199fb6d19793905dcdd65', ) Seems like user is still NOT logged in. At now we can't do anything. Try to login using the URL above. ======== Session array: array ( 'counter' => 1, 'fb_446458238729594_state' => '6ae5ea9e5f7199fb6d19793905dcdd65', )
Please help me figure out why the login does not work? Why doesn't the Facebook class instance retrieve the access token? And why does the Facebook :: getUser () method always return 0? How can i fix this?