具有多个 PHP 页面的 Facebook 应用程序
我正在使用 PHP 和 Facebook SDK 构建一个 iframe 应用程序。第一页上有一个“下载”按钮，链接到第二页。在第二页上，我使用以下代码：
$signed_request = $facebook->getSignedRequest();
$page_id = $signed_request["page"]["id"];
$page_admin = $signed_request["page"]["admin"];
$like_status = $signed_request["page"]["liked"];
if ($like_status) {
include('download.php');
}
else {
include('non-fan.php');
}
我只想为喜欢我们 Facebook 页面的人提供下载。由于某种原因 $signed_request 变量为空。我该如何解决这个问题？
I'm building an iframe application with PHP and the Facebook SDK. On the first page there's an "download" button which links to the second page. On the second page I use the following code:
$signed_request = $facebook->getSignedRequest();
$page_id = $signed_request["page"]["id"];
$page_admin = $signed_request["page"]["admin"];
$like_status = $signed_request["page"]["liked"];
if ($like_status) {
include('download.php');
}
else {
include('non-fan.php');
}
I want to provide the download ONLY for people who liked our Facebook page. For some reason the $signed_request variables are empty. How can I solve this?
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在 iframe 中，Facebook 仅在整个页面初始加载时发布签名请求。 iframe 内的后续页面加载将不会收到该帖子。
您可以序列化签名的请求变量并将其存储在会话中，然后在每次页面加载时检查是否有新的请求变量，如果没有，则从会话中获取它。
In the iframe, Facebook only posts the signed request on the initial load of the whole page. Subsequent pageloads within the iframe won't receive the post.
You can serialize the signed request variable and stash it in your session, then on each pageload check if you've got a fresh one, and if you haven't then grab it from your session.