PHP-Facebook登录

我们可以使用Facebook登录名来允许用户访问网站。此页面将向您说明有关使用Facebook PHP SDK登录的信息。

用Facebook登录

• 需要转到https://developers.facebook.com/apps/并单击添加新组按钮以创建应用程序ID。

• 选择网站

• 输入应用名称，然后单击“创建新的Facebook应用ID”

• 点击创建应用程序ID

• 单击跳过快速测试

在最终阶段，它将显示如下图所示。

fbconfig.php文件概述

• 现在打开fbconfig.php文件并添加您的应用程序ID和应用程序Secrete

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

最后是fbconfig.php文件，如下所示-

<?php session_start();
   
   // added in v4.0.0
   require_once 'autoload.php';
   use FacebookFacebookSession;
   use FacebookFacebookRedirectLoginHelper;
   use FacebookFacebookRequest;
   use FacebookFacebookResponse;
   use FacebookFacebookSDKException;
   use FacebookFacebookRequestException;
   use FacebookFacebookAuthorizationException;
   use FacebookGraphObject;
   use FacebookEntitiesAccessToken;
   use FacebookHttpClientsFacebookCurlHttpClient;
   use FacebookHttpClientsFacebookHttpable;
   
   // 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FB

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

Index.php

索引页面如下所示。

<?php session_start(); 
??>

   
   
      <title>Login with Facebook</title>
      <link href="http://www.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css" rel="stylesheet">
   
   
   
      <?php if ($_SESSION['FBID']): ??>      <!--  After user login  -->
         
         <div>
            
            <div>
               <h2>Hello <?php echo $_SESSION['USERNAME']; ??></h2>
               <p>Welcome to "facebook login" tutorial</p>
            </div>
            
            <div>
                
               <ul>
                  <li>Image</li>
                        
                  <li><img src="https://mangdo-1254073825.cos.ap-chengdu.myqcloud.com//front_eng_imgs/programiz/7f9013248e9a8fc92b5f7713c29c68ef722afa2b403e6538c4980998_23.jpg"></li>
                  
                  <li>Facebook ID</li>
                  <li><?php echo  $_SESSION['FBID']; ??></li>
               
                  <li>Facebook fullname</li>
                        
                  <li><?php echo $_SESSION['FULLNAME']; ??></li>
               
                  <li>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>
            <h2>Login with Facebook</h2>
            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 ??>
      
   

它将产生结果。在尝试此示例之前，请在浏览器中注销脸书帐户。

登出Facebook

下面的代码用于注销Facebook。

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