PHP Facebook登陆

我们可以使用Facebook登陆来允许用户进入网站。本页面将向您解释如何使用Facebook PHP SDK进行登陆。

使用Facebook登陆

需要访问 https://developers.facebook.com/apps/ 然后点击添加新分组的按钮来创建应用ID。
选择网站
给应用程序命名，并点击创建新的Facebook应用ID
点击创建应用ID
点击跳过快速测试

在最后阶段，会显示如下图像。

PHP Facebook登陆

fbconfig.php文件概述

现在打开fbconfig.php文件，添加你的App ID和App Secret

FacebookSession::setDefaultApplication( 'your app ID','App Secrete ' );
// login helper with redirect_uri
   $helper = new FacebookRedirectLoginHelper('You web address' );

最后的fbconfig.php文件如下所示−

<?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( '496544657159182','e6d239655aeb3e496e52fabeaf1b1f93' );

   // login helper with redirect_uri
    $helper = new FacebookRedirectLoginHelper('http://www.tutorialspoint.com/' ); try {$ session =  $helper->getSessionFromRedirect(); }catch( FacebookRequestException$ ex ) {
      // When Facebook returns an error
   }catch( Exception  $ex ) { // When validation fails or other local issues } // see if we have a session if ( isset($ 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;

      /* ---- header location after session ----*/
      header("Location: index.php");
   }else {
       $loginUrl =$ helper->getLoginUrl();
      header("Location: ".$loginUrl);
   }
?>

登录页面概述

登录页面用于登录到FB

<?php
   session_start();
   session_unset();

    $_SESSION['FBID'] = NULL;$ _SESSION['FULLNAME'] = NULL;
   $_SESSION['EMAIL'] =  NULL;
   header("Location: index.php");        
?>

Index.php

Index页面如下所示。

<?php
   session_start(); 
?>
<html xmlns:fb = "http://www.facebook.com/2008/fbml">

   <head>
      <title>Login with Facebook</title>
      <link 
         href = "http://www.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css" 
         rel = "stylesheet">
   </head>

   <body>
      <?php if ( $_SESSION['FBID']): ?> <!-- After user login --> <div class = "container"> <div class = "hero-unit"> <h1>Hello <?php echo$ _SESSION['USERNAME']; ?></h1>
               <p>Welcome to "facebook login" tutorial</p>
            </div>

            <div class = "span4">

               <ul class = "nav nav-list">
                  <li class = "nav-header">Image</li>

                  <li><img src = "https://graph.facebook.com/<?php 
                     echo  $_SESSION['FBID']; ?>/picture"></li> <li class = "nav-header">Facebook ID</li> <li><?php echo$ _SESSION['FBID']; ?></li>

                  <li class = "nav-header">Facebook fullname</li>

                  <li><?php echo  $_SESSION['FULLNAME']; ?></li> <li class = "nav-header">Facebook Email</li> <li><?php echo$ _SESSION['EMAIL']; ?></li>

                  <div><a href="logout.php">Logout</a></div>

               </ul>

            </div>
         </div>

         <?php else: ?>     <!-- Before login --> 

         <div class = "container">
            <h1>Login with Facebook</h1>
            Not Connected

            <div>
               <a href = "fbconfig.php">Login with Facebook</a>
            </div>

            <div>
               <a href = "http://www.tutorialspoint.com"  
                  title = "Login with facebook">More information about Tutorialspoint</a>
            </div>
         </div>

      <?php endif ?>

   </body>
</html>

这将产生结果。在尝试此示例之前，请在浏览器中注销您的Facebook帐户。

PHP Facebook登陆

退出 Facebook

下面的代码用于退出 Facebook。

<?php 
   session_start();.
   session_unset();

    $_SESSION['FBID'] = NULL;$ _SESSION['FULLNAME'] = NULL;
   $_SESSION['EMAIL'] =  NULL;
   header("Location: index.php");        
?>