我在使用 Facebook 登录我的网站时遇到问题。
我按照 developers.facebook.com 上的教程使用 Facebook SDK 创建了登录，但它对我不起作用。
我写了一个简单的测试页面来找出问题所在。这是代码:
<!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's 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>
第一次访问这个页面后(我没有登录 Facebook)，我得到这个输出:
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's 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',
)
然后我尝试使用给定的 URL 登录。它会将我带到我的 Facebook 应用程序授权页面。确认请求的权限后，它将我重定向到此 URL:
http://mysite.localhost/?state=84260edcd60940884d261812496a488c&code=AQDkHPlXXweEiTjXg-sUXwwQAy0_xRYc89Opfz6AF9dlGOomCSG7fjf0440ctHuADKMEG4P7CheeNx9PnwUta-jkfpm03MjDCKyieOZpIPG-evlKYm64mRxD2Q5f_-HJROIC9I_-lHswr5RT3huSQySA55pD28b07Ouv87NqihZ1brGfU-_0LyhcdldtNikb-2xn6NRpa17xEmU37pBqDV1r#_=_
在那之后，我希望我登录并且我的页面检索并显示我的 Facebook 个人资料中的一些信息，但它没有。我得到这个输出:
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',
)
请帮我弄清楚，为什么登录不起作用？为什么 Facebook 类的实例不检索访问 token ？为什么 Facebook::getUser() 方法总是返回 0？我该如何解决？
最佳答案
要在这里尝试一下 - 请耐心等待:
可能原因一: 您的 FB 代码看起来不错 - 但您的错误状态是:
“无法连接到 2a03:2880:2050:1f01:face:b00c:0:2:网络无法访问”，这表明存在 cURL 问题。
您能否确认您的 cURL 已安装/正在您的网络服务器上运行？一个简单的 phpinfo();会告诉你的。
可能的原因 2: 检查您的应用程序 URL 是否设置为您运行测试的位置。您的重定向 URI 是“http://mysite.localhost/” - 因此请确保在您的应用程序设置页面中它是对应的。
最后，
只需从基础开始，然后开始添加所有额外代码。这对我有用:
<?php
require 'src/facebook.php';
$facebook = new Facebook(array(
'appId' => 'xxxxxxxxxxxxxxxxxxx',
'secret' => 'xxxxxxxxxxxxxxxxxxx',
));
// See if there is a user from a cookie
$user = $facebook->getUser();
if ($user) {
try {
// Proceed knowing you have a logged in user who's authenticated.
$user_profile = $facebook->api('/me');
$logoutUrl = $facebook->getLogoutUrl();
} catch (FacebookApiException $e) {
echo '<pre>'.htmlspecialchars(print_r($e, true)).'</pre>';
$user = null;
$loginUrl = $facebook->getLoginUrl($params);
}
}
?>
<?php if ($user) { ?>
Your user profile is
<?php print htmlspecialchars(print_r($user_profile, true)) ?>
<a href="<?php echo $logoutUrl; ?>">Logout</a>
<?php } else { ?>
<a href="<?php echo $loginUrl; ?>">Login with Facebook</a>
<?php } ?>'
关于php - 使用 Facebook SDK for PHP 登录 Facebook，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13032246/