所以出于某种原因我有一个问题，即getsessionformredirect总是返回null，日志总是输出“session =” 返回null， 我已经浏览了很多线程，甚至尝试过来自其他领域的fb登录示例文件，但没有。我也登录，如果我清除我的缓存并通过我的网站登录然后转到FB我登录到Facebook，所以登录成功。
这是代码
<?php
session_start();
// added in v4.0.0
require_once 'autoload.php';
use Facebook\FacebookSession;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\FacebookRequest;
use Facebook\FacebookResponse;
use Facebook\FacebookSDKException;
use Facebook\FacebookRequestException;
use Facebook\FacebookAuthorizationException;
use Facebook\GraphObject;
use Facebook\Entities\AccessToken;
use Facebook\HttpClients\FacebookCurlHttpClient;
use Facebook\HttpClients\FacebookHttpable;
// init app with app id and secret
FacebookSession::setDefaultApplication( '****','****' );
// login helper with redirect_uri
$helper = new FacebookRedirectLoginHelper('myurl/login_form.php' );
try {
$session = $helper->getSessionFromRedirect();
} catch( FacebookRequestException $ex ) {
// When Facebook returns an error
} catch( Exception $ex ) {
// When validation fails or other local issues
}
error_log("session = $session \n", 3 , "C:/wamp/logs/php_error.log");
// see if we have a session
if ( isset( $session ) ) {
// graph api request for user data
$request = new FacebookRequest( $session, 'GET', '/me' );
$response = $request->execute();
// get response
$graphObject = $response->getGraphObject();
$fbid = $graphObject->getProperty('id'); // To Get Facebook ID
$fbfullname = $graphObject->getProperty('name'); // To Get Facebook full name
$femail = $graphObject->getProperty('email'); // To Get Facebook email ID
/* ---- Session Variables -----*/
$_SESSION['FBID'] = $fbid;
$_SESSION['FULLNAME'] = $fbfullname;
$_SESSION['EMAIL'] = $femail;
echo( $_SESSION['FBID']);
/* ---- header location after session ----*/
header("Location: login_form.php");
} else {
$loginUrl = $helper->getLoginUrl();
header("Location: ".$loginUrl);
}
?>
并且你需要看到自动加载
<?php
/**
* Copyright 2014 Facebook, Inc.
*
* You are hereby granted a non-exclusive, worldwide, royalty-free license to
* use, copy, modify, and distribute this software in source code or binary
* form for use in connection with the web services and APIs provided by
* Facebook.
*
* As with any software that integrates with the Facebook platform, your use
* of this software is subject to the Facebook Developer Principles and
* Policies [http://developers.facebook.com/policy/]. This copyright notice
* shall be included in all copies or substantial portions of the software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
/**
* You only need this file if you are not using composer.
* Why are you not using composer?
* https://getcomposer.org/
*/
if (version_compare(PHP_VERSION, '5.4.0', '<')) {
throw new Exception('The Facebook SDK v4 requires PHP version 5.4 or higher.');
}
/**
* Register the autoloader for the Facebook SDK classes.
* Based off the official PSR-4 autoloader example found here:
* https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-4-autoloader-examples.md
*
* @param string $class The fully-qualified class name.
* @return void
*/
spl_autoload_register(function ($class)
{
$prefix = 'Facebook\\';
$base_dir = defined('FACEBOOK_SDK_V4_SRC_DIR') ? FACEBOOK_SDK_V4_SRC_DIR : __DIR__ . '/src/Facebook/';
$len = strlen($prefix);
if (strncmp($prefix, $class, $len) !== 0) {
return;
}
$relative_class = substr($class, $len);
$file = $base_dir . str_replace('\\', '/', $relative_class) . '.php';
// if the file exists, require it
if (file_exists($file)) {
require $file;
}
});
答案 0 :(得分：0)
这似乎是页面返回的URL中的一个错误，一切正常，现在要弄清楚为什么链接在IE中不起作用。
答案 1 :(得分：-1)
<?php
session_start();
// added in v4.0.0
require_once 'autoload.php';
use Facebook\FacebookSession;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\FacebookRequest;
use Facebook\FacebookResponse;
use Facebook\FacebookSDKException;
use Facebook\FacebookRequestException;
use Facebook\FacebookAuthorizationException;
use Facebook\GraphObject;
use Facebook\Entities\AccessToken;
use Facebook\HttpClients\FacebookCurlHttpClient;
use Facebook\HttpClients\FacebookHttpable;
// init app with app id and secret
FacebookSession::setDefaultApplication( '****','****' );
// login helper with redirect_uri
$helper = new FacebookRedirectLoginHelper('myurl/login_form.php' );
try {
$session = $helper->getSessionFromRedirect();
} catch( FacebookRequestException $ex ) {
// When Facebook returns an error
} catch( Exception $ex ) {
// When validation fails or other local issues
}
error_log("session = $session \n", 3 , "C:/wamp/logs/php_error.log");
// see if we have a session
if ( isset( $session ) ) {
// graph api request for user data
$request = new FacebookRequest( $session, 'GET', '/me' );
$response = $request->execute();
// get response
$graphObject = $response->getGraphObject();
$fbid = $graphObject->getProperty('id'); // To Get Facebook ID
$fbfullname = $graphObject->getProperty('name'); // To Get Facebook full name
$femail = $graphObject->getProperty('email'); // To Get Facebook email ID
/* ---- Session Variables -----*/
$_SESSION['FBID'] = $fbid;
$_SESSION['FULLNAME'] = $fbfullname;
$_SESSION['EMAIL'] = $femail;
echo( $_SESSION['FBID']);
/* ---- header location after session ----*/
header("Location: login_form.php");
} else {
$loginUrl = $helper->getLoginUrl();
header("Location: ".$loginUrl);
}
?>