我使用 Heroku 在 Facebook 上启动了一个新的 PHP 应用程序。他们从您可以修改的示例网页开始。当您第一次访问该页面时，它看起来像这样。
index.php 中左上角的登录按钮的代码在哪里？
如果您按下该按钮，您就会看到下一页。
如您所见，该应用仅获得 3 项权限(基本信息、点赞、照片)。我想添加更多权限，但我找不到代码中发生这种情况的位置。它在哪里？
这是index.php的完整源代码。
<?php
/**
* This sample app is provided to kickstart your experience using Facebook's
* resources for developers. This sample app provides examples of several
* key concepts, including authentication, the Graph API, and FQL (Facebook
* Query Language). Please visit the docs at 'developers.facebook.com/docs'
* to learn more about the resources available to you
*/
// Provides access to app specific values such as your app id and app secret.
// Defined in 'AppInfo.php'
require_once('AppInfo.php');
// Enforce https on production
if (substr(AppInfo::getUrl(), 0, 8) != 'https://' && $_SERVER['REMOTE_ADDR'] != '127.0.0.1') {
header('Location: https://'. $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
exit();
}
// This provides access to helper functions defined in 'utils.php'
require_once('utils.php');
/*****************************************************************************
*
* The content below provides examples of how to fetch Facebook data using the
* Graph API and FQL. It uses the helper functions defined in 'utils.php' to
* do so. You should change this section so that it prepares all of the
* information that you want to display to the user.
*
****************************************************************************/
require_once('sdk/src/facebook.php');
$facebook = new Facebook(array(
'appId' => AppInfo::appID(),
'secret' => AppInfo::appSecret(),
));
$user_id = $facebook->getUser();
if ($user_id) {
try {
// Fetch the viewer's basic information
$basic = $facebook->api('/me');
} catch (FacebookApiException $e) {
// If the call fails we check if we still have a user. The user will be
// cleared if the error is because of an invalid accesstoken
if (!$facebook->getUser()) {
header('Location: '. AppInfo::getUrl($_SERVER['REQUEST_URI']));
exit();
}
}
// This fetches some things that you like . 'limit=*" only returns * values.
// To see the format of the data you are retrieving, use the "Graph API
// Explorer" which is at https://developers.facebook.com/tools/explorer/
$likes = idx($facebook->api('/me/likes?limit=4'), 'data', array());
// This fetches 4 of your friends.
$friends = idx($facebook->api('/me/friends?limit=4'), 'data', array());
// And this returns 16 of your photos.
$photos = idx($facebook->api('/me/photos?limit=16'), 'data', array());
// Here is an example of a FQL call that fetches all of your friends that are
// using this app
$app_using_friends = $facebook->api(array(
'method' => 'fql.query',
'query' => 'SELECT uid, name FROM user WHERE uid IN(SELECT uid2 FROM friend WHERE uid1 = me()) AND is_app_user = 1'
));
}
// Fetch the basic info of the app that they are using
$app_info = $facebook->api('/'. AppInfo::appID());
$app_name = idx($app_info, 'name', '');
?>
<!DOCTYPE html>
<html xmlns:fb="http://ogp.me/ns/fb#" lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=2.0, user-scalable=yes" />
<title><?php echo he($app_name); ?></title>
<link rel="stylesheet" href="stylesheets/screen.css" media="Screen" type="text/css" />
<link rel="stylesheet" href="stylesheets/mobile.css" media="handheld, only screen and (max-width: 480px), only screen and (max-device-width: 480px)" type="text/css" />
<!--[if IEMobile]>
<link rel="stylesheet" href="mobile.css" media="screen" type="text/css" />
<![endif]-->
<!-- These are Open Graph tags. They add meta data to your -->
<!-- site that facebook uses when your content is shared -->
<!-- over facebook. You should fill these tags in with -->
<!-- your data. To learn more about Open Graph, visit -->
<!-- 'https://developers.facebook.com/docs/opengraph/' -->
<meta property="og:title" content="<?php echo he($app_name); ?>" />
<meta property="og:type" content="website" />
<meta property="og:url" content="<?php echo AppInfo::getUrl(); ?>" />
<meta property="og:image" content="<?php echo AppInfo::getUrl('/logo.png'); ?>" />
<meta property="og:site_name" content="<?php echo he($app_name); ?>" />
<meta property="og:description" content="My first app" />
<meta property="fb:app_id" content="<?php echo AppInfo::appID(); ?>" />
<script type="text/javascript" src="/javascript/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
function logResponse(response) {
if (console && console.log) {
console.log('The response was', response);
}
}
$(function(){
// Set up so we handle click on the buttons
$('#postToWall').click(function() {
FB.ui(
{
method : 'feed',
link : $(this).attr('data-url')
},
function (response) {
// If response is null the user canceled the dialog
if (response != null) {
logResponse(response);
}
}
);
});
$('#sendToFriends').click(function() {
FB.ui(
{
method : 'send',
link : $(this).attr('data-url')
},
function (response) {
// If response is null the user canceled the dialog
if (response != null) {
logResponse(response);
}
}
);
});
$('#sendRequest').click(function() {
FB.ui(
{
method : 'apprequests',
message : $(this).attr('data-message')
},
function (response) {
// If response is null the user canceled the dialog
if (response != null) {
logResponse(response);
}
}
);
});
});
</script>
<!--[if IE]>
<script type="text/javascript">
var tags = ['header', 'section'];
while(tags.length)
document.createElement(tags.pop());
</script>
<![endif]-->
</head>
<body>
<div id="fb-root"></div>
<script type="text/javascript">
window.fbAsyncInit = function() {
FB.init({
appId : '<?php echo AppInfo::appID(); ?>', // App ID
channelUrl : '//<?php echo $_SERVER["HTTP_HOST"]; ?>/channel.html', // Channel File
status : true, // check login status
cookie : true, // enable cookies to allow the server to access the session
xfbml : true // parse XFBML
});
// Listen to the auth.login which will be called when the user logs in
// using the Login button
FB.Event.subscribe('auth.login', function(response) {
// We want to reload the page now so PHP can read the cookie that the
// Javascript SDK sat. But we don't want to use
// window.location.reload() because if this is in a canvas there was a
// post made to this page and a reload will trigger a message to the
// user asking if they want to send data again.
window.location = window.location;
});
FB.Canvas.setAutoGrow();
};
// Load the SDK Asynchronously
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
<header class="clearfix">
<?php if (isset($basic)) { ?>
<p id="picture" style="background-image: url(https://graph.facebook.com/<?php echo he($user_id); ?>/picture?type=normal)"></p>
<div>
<h1>Welcome, <strong><?php echo he(idx($basic, 'name')); ?></strong></h1>
<p class="tagline">
This is your app
<a href="<?php echo he(idx($app_info, 'link'));?>" target="_top"><?php echo he($app_name); ?></a>
</p>
<div id="share-app">
<p>Share your app:</p>
<ul>
<li>
<a href="#" class="facebook-button" id="postToWall" data-url="<?php echo AppInfo::getUrl(); ?>">
<span class="plus">Post to Wall</span>
</a>
</li>
<li>
<a href="#" class="facebook-button speech-bubble" id="sendToFriends" data-url="<?php echo AppInfo::getUrl(); ?>">
<span class="speech-bubble">Send Message</span>
</a>
</li>
<li>
<a href="#" class="facebook-button apprequests" id="sendRequest" data-message="Test this awesome app">
<span class="apprequests">Send Requests</span>
</a>
</li>
</ul>
</div>
</div>
<?php } else { ?>
<div>
<h1>Welcome</h1>
<div class="fb-login-button" data-scope="user_likes,user_photos"></div>
</div>
<?php } ?>
</header>
<section id="get-started">
<p>Welcome to your Facebook app, running on <span>heroku</span>!</p>
<a href="https://devcenter.heroku.com/articles/facebook" target="_top" class="button">Learn How to Edit This App</a>
</section>
<?php
if ($user_id) {
?>
<section id="samples" class="clearfix">
<h1>Examples of the Facebook Graph API</h1>
<div class="list">
<h3>A few of your friends</h3>
<ul class="friends">
<?php
foreach ($friends as $friend) {
// Extract the pieces of info we need from the requests above
$id = idx($friend, 'id');
$name = idx($friend, 'name');
?>
<li>
<a href="https://www.facebook.com/<?php echo he($id); ?>" target="_top">
<img src="https://graph.facebook.com/<?php echo he($id) ?>/picture?type=square" alt="<?php echo he($name); ?>">
<?php echo he($name); ?>
</a>
</li>
<?php
}
?>
</ul>
</div>
<div class="list inline">
<h3>Recent photos</h3>
<ul class="photos">
<?php
$i = 0;
foreach ($photos as $photo) {
// Extract the pieces of info we need from the requests above
$id = idx($photo, 'id');
$picture = idx($photo, 'picture');
$link = idx($photo, 'link');
$class = ($i++ % 4 === 0) ? 'first-column' : '';
?>
<li style="background-image: url(<?php echo he($picture); ?>);" class="<?php echo $class; ?>">
<a href="<?php echo he($link); ?>" target="_top"></a>
</li>
<?php
}
?>
</ul>
</div>
<div class="list">
<h3>Things you like</h3>
<ul class="things">
<?php
foreach ($likes as $like) {
// Extract the pieces of info we need from the requests above
$id = idx($like, 'id');
$item = idx($like, 'name');
// This display's the object that the user liked as a link to
// that object's page.
?>
<li>
<a href="https://www.facebook.com/<?php echo he($id); ?>" target="_top">
<img src="https://graph.facebook.com/<?php echo he($id) ?>/picture?type=square" alt="<?php echo he($item); ?>">
<?php echo he($item); ?>
</a>
</li>
<?php
}
?>
</ul>
</div>
<div class="list">
<h3>Friends using this app</h3>
<ul class="friends">
<?php
foreach ($app_using_friends as $auf) {
// Extract the pieces of info we need from the requests above
$id = idx($auf, 'uid');
$name = idx($auf, 'name');
?>
<li>
<a href="https://www.facebook.com/<?php echo he($id); ?>" target="_top">
<img src="https://graph.facebook.com/<?php echo he($id) ?>/picture?type=square" alt="<?php echo he($name); ?>">
<?php echo he($name); ?>
</a>
</li>
<?php
}
?>
</ul>
</div>
</section>
<?php
}
?>
<section id="guides" class="clearfix">
<h1>Learn More About Heroku & Facebook Apps</h1>
<ul>
<li>
<a href="https://www.heroku.com/?utm_source=facebook&utm_medium=app&utm_campaign=fb_integration" target="_top" class="icon heroku">Heroku</a>
<p>Learn more about <a href="https://www.heroku.com/?utm_source=facebook&utm_medium=app&utm_campaign=fb_integration" target="_top">Heroku</a>, or read developer docs in the Heroku <a href="https://devcenter.heroku.com/" target="_top">Dev Center</a>.</p>
</li>
<li>
<a href="https://developers.facebook.com/docs/guides/web/" target="_top" class="icon websites">Websites</a>
<p>
Drive growth and engagement on your site with
Facebook Login and Social Plugins.
</p>
</li>
<li>
<a href="https://developers.facebook.com/docs/guides/mobile/" target="_top" class="icon mobile-apps">Mobile Apps</a>
<p>
Integrate with our core experience by building apps
that operate within Facebook.
</p>
</li>
<li>
<a href="https://developers.facebook.com/docs/guides/canvas/" target="_top" class="icon apps-on-facebook">Apps on Facebook</a>
<p>Let users find and connect to their friends in mobile apps and games.</p>
</li>
</ul>
</section>
</body>
</html>
最佳答案
登录按钮是根据下面div的属性使用javascript创建的
<div class="fb-login-button" data-scope="user_likes,user_photos"></div>
您可以向逗号分隔列表添加额外的权限。
关于php - 这里获取权限并显示登录按钮的代码在哪里？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9554428/