使用Facebook PHP-SDK 3.x向Codeigniter 2.1.0注册/登录用户

Question

浏览Facebook API,我对正确的方法感到困惑.我希望用户跳过注册,或者如果他们使用Facebook登录则自动注册.因此,如果他们登录Facebook,我会收集他们的ID,电子邮件并在我的用户表中创建一条记录.

如果用户表中已存在id,则跳过自动注册并直接转到成员页面.这是我的代码到目前为止(摘自Facebook的PHP SDK示例).当我运行注册脚本时,页面显示为空白,我不会被重定向.

编辑:似乎在要求之后失败,如果我使用以下代码'test'永远不会被打印.

编辑:我正在使用Codeigniter,这个脚本是控制器的一部分,会导致问题的问题吗？

require 'http://localhost/facebook-php-sdk-6c82b3f/src/facebook.php';
echo "test";

-

public function signup()
    {   
        require 'http://localhost/facebook-php-sdk-6c82b3f/src/facebook.php';

        // Create our Application instance (replace this with your appId and secret).
        $facebook = new Facebook(array(
          'appId'  => 'xxxxxxxxxxxxxxx',
          'secret' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxx',
        ));

        // Get User ID
        $user = $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.

        if ($user)
        {
            try
            {
                // Proceed knowing you have a logged in user who's authenticated.
                $user_profile = $facebook->api('/me');
            }
            catch (FacebookApiException $e)
            {
                error_log($e);
                $user = null;
            }
        }

        // Login or logout url will be needed depending on current user state.
        if ($user)
        {
            $logoutUrl = $facebook->getLogoutUrl();
        }
        else
        {
            $loginUrl = $facebook->getLoginUrl(array('scope' => 'email'));
            redirect($loginUrl);
        }

        print_r($user_profile);


        $this->load->model("user_model");
        $privileges = 1;
        $loginLocation = ip2long($_SERVER['REMOTE_ADDR']);
        $active = 1;
        $this->user_model->add_user($user_profile->id, $user_profile->name, $user_profile->email, $loginLocation, $privileges, $active);

    }

Answer 1

我建议你阅读框架文档.向CodeIgniter添加库不是一项艰巨的任务.Facebook库也不例外.

这是我刚刚提出的快速集成:

1.创建配置文件:application/config/facebook.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
$config['appId'] = 'app_id';
$config['secret'] = 'app_secret';

2.将sdk文件放在libraries文件夹中application/libraries/,并将facebook.php文件重命名为Facebook.php,并将php标记替换为:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

3.在您的控制器中加载配置文件,然后加载Facebook库:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Welcome extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        // Your own constructor code
        $CI = & get_instance();
        $CI->config->load("facebook",TRUE);
        $config = $CI->config->item('facebook');
        $this->load->library('facebook', $config);
    }

    public function index()
    {
        $user = $this->facebook->getUser();
        if($user) {
            try {
                $user_info = $this->facebook->api('/me');
                echo '<pre>'.htmlspecialchars(print_r($user_info, true)).'</pre>';
            } catch(FacebookApiException $e) {
                echo '<pre>'.htmlspecialchars(print_r($e, true)).'</pre>';
                $user = null;
            }
        } else {
            echo "<a href=\"{$this->facebook->getLoginUrl()}\">Login using Facebook</a>";
        }
    }
}

现在在构造函数方法中,您刚刚初始化了Facebook库(sdk),可以使用以下方法访问它:$this->facebook.

笔记:

• 您可以随时使用现有的库,只需谷歌
• 通常的做法是扩展核心Controller类并在那里添加Facebook库初始化.
• 或者创建另一个库,扩展Facebook库,在那里加载配置文件,然后自动加载这个新库.