好吧，几天来我一直在尝试将Facebook身份验证集成到我的基于Codeigniter的网站中。我已经将Facebook PHP SDK作为一个库包含在内，它似乎连接得很好，但当我在SDK中使用getUser方法时，会返回一个0，表明我没有登录（除了我登录了Facebook）。下面我介绍了库形式的PHP SDK、调用SDK中方法的模型、从模型中捕获数据的控制器以及向用户显示信息的视图。我希望耶鲁大学能为我提供一些关于这个令人恼火的问题的见解。感谢您提前提供的帮助！！（只是为了以防万一，我想知道我使用的是我在上找到的教程中的一些代码http://www.dannyherran.com/2011/02/facebook-php-sdk-and-codeigniter-for-basic-user-authentication/)：
FB PHP SDK库（存储在应用程序/库中）：
<?php //if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
require_once "base_facebook.php";
/**
* Extends the BaseFacebook class with the intent of using
* PHP sessions to store user ids and access tokens.
*/
class Facebook extends BaseFacebook
{
/**
* Identical to the parent constructor, except that
* we start a PHP session to store the user ID and
* access token if during the course of execution
* we discover them.
*
* @param Array $config the application configuration.
* @see BaseFacebook::__construct in facebook.php
*/
public function __construct($config) {
if (!session_id()) {
session_start();
}
parent::__construct($config);
}
protected static $kSupportedKeys =
array('state', 'code', 'access_token', 'user_id');
/**
* Provides the implementations of the inherited abstract
* methods. The implementation uses PHP sessions to maintain
* a store for authorization codes, user ids, CSRF states, and
* access tokens.
*/
protected function setPersistentData($key, $value) {
if (!in_array($key, self::$kSupportedKeys)) {
self::errorLog('Unsupported key passed to setPersistentData.');
return;
}
$session_var_name = $this->constructSessionVariableName($key);
$_SESSION[$session_var_name] = $value;
}
protected function getPersistentData($key, $default = false) {
if (!in_array($key, self::$kSupportedKeys)) {
self::errorLog('Unsupported key passed to getPersistentData.');
return $default;
}
$session_var_name = $this->constructSessionVariableName($key);
return isset($_SESSION[$session_var_name]) ?
$_SESSION[$session_var_name] : $default;
}
protected function clearPersistentData($key) {
if (!in_array($key, self::$kSupportedKeys)) {
self::errorLog('Unsupported key passed to clearPersistentData.');
return;
}
$session_var_name = $this->constructSessionVariableName($key);
unset($_SESSION[$session_var_name]);
}
protected function clearAllPersistentData() {
foreach (self::$kSupportedKeys as $key) {
$this->clearPersistentData($key);
}
}
protected function constructSessionVariableName($key) {
return implode('_', array('fb',
$this->getAppId(),
$key));
}
}
?>
型号：
<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
class Facebook_model extends CI_Model {
public function __construct(){
parent::__construct();
$profile = null;
// Create our Application instance (replace this with your appId and secret).
$config = array(
'appId' => 'MYAPPID',
'secret' => 'MYSECRET',
'fileUpload' => true, // Indicates if the CURL based @ syntax for file uploads is enabled.
);
echo $this->load->library('Facebook', $config);
// Get User ID
$user = $this->facebook->getUser();
// We may or may not have this data based on whether the user is logged in.
//
// If we have a $user id here, it means we know the user is logged into
// Facebook, but we don't know if the access token is valid. An access
// token is invalid if the user logged out of Facebook.
$profile = null;
if($user)
{
try {
// Proceed knowing you have a logged in user who's authenticated.
$profile = $this->facebook->api('/me?fields=id,name,link,email');
} catch (FacebookApiException $e) {
error_log($e);
$user = null;
}
}
$fb_data = array(
'me' => $profile,
'uid' => $user,
'loginUrl' => $this->facebook->getLoginUrl(
array(
'scope' => 'email,user_birthday,publish_stream', // app permissions
'redirect_uri' => '/profile' // URL where you want to redirect your users after a successful login
)
),
'logoutUrl' => $this->facebook->getLogoutUrl(),
);
$this->session->set_userdata('fb_data', $fb_data);
}
}
?>
控制器：
<?php
class The_facebook extends CI_Controller {
public function __construct(){
parent::__construct();
$this->load->model('facebook_model');
}
public function index(){
print_r($this->facebook);
$fb_data = $this->session->userdata('fb_data'); // This array contains all the user FB information
if((!$fb_data['uid']) or (!$fb_data['me']))
{
// If this is a protected section that needs user authentication
// you can redirect the user somewhere else
// or take any other action you need
//redirect(base_url());
echo "redirect";
}
else
{
$data = array(
'fb_data' => $fb_data,
);
$this->load->view('sand_view', $data);
}
}
}
?>
最后是观点：
<body>
<div>
<?php if(!$fb_data['me']): ?>
Please login with your FB account: <a href="<?php echo $fb_data['loginUrl']; ?>">login</a>
<!-- Or you can use XFBML -->
<div class="fb-login-button" data-show-faces="false" data-width="100" data-max-rows="1" data-scope="email,user_birthday,publish_stream"></div>
<?php else: ?>
<img src="https://graph.facebook.com/<?php echo $fb_data['uid']; ?>/picture" alt="" class="pic" />
<p>Hi <?php echo $fb_data['me']['name']; ?>,<br />
<a href="<?php echo site_url('topsecret'); ?>">You can access the top secret page</a> or <a href="<?php echo $fb_data['logoutUrl']; ?>">logout</a> </p>
<?php endif; ?>
</div>
</body>
我也遇到了同样的问题，我的破解方法是将配置数组添加到facebook类的构造函数中，而不是将其作为参数传递给构造函数。由于某种原因，配置数组没有被传递或读取。
所以我的破解看起来如下：
public function __construct() {
if (!session_id()) {
session_start();
}
$config = array(
'appId' => FACEBOOK_APP_ID,
'secret' => FACEBOOK_SECRET
);
parent::__construct($config);
}
希望这能有所帮助。
我已经在CodeIgniter上使用Facebook SDK一段时间了，并决定将我的代码作为开源扩展发布。有一件事：这段代码将SDK作为一个库，并在此基础上构建了一个模型，准备使用其他多个很棒的函数。
如果你想使用它，或者以任何方式（问题、提交等）做出贡献，请随时加入：
https://github.com/AlphabaseIT/CIconnect
我最终创建了一个自己的集成，你可以从GitHub下载：https://github.com/cworsley4/Codeigniter-with-Facebook