Facebook 签名请求问题

Question

我想为我的 facebook 页面编写一个 fangate，但它不起作用，而且我在互联网上找不到任何帮助

require 'facebook.php';

$app_id = '16850872653xxxx';
$app_secret = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
'cookie' => true
));

$signed_request = $_REQUEST['signed_request'];

//echo $signed_request;

list($encoded_sig, $payload) = explode('.', $signed_request, 2); 


// decode the data
$sig = base64_url_decode($encoded_sig);
$data = json_decode(base64_url_decode($payload), true);

// check sig
$expected_sig = hash_hmac('sha256', $payload, $app_secret, $raw = true);

function base64_url_decode($input) {
return base64_decode(strtr($input, '-_', '+/'));
}

if($signed_request->page->liked) {
echo "This content is for Fans only!";
} else {
echo "Please click on the Like button to view this tab!";
}

我正在使用此代码...但它只是跳转到 github，我在那里下载了 facebook.php... ？

有人发现这段代码有问题吗

require 只是跳转到 github 并且 json_decode 不起作用......

Answer 1

您发送的代码有一些错误。这就是我使用的方法，并且它有效：

if (isset($_REQUEST['signed_request'])) {
      $encoded_sig = null;
      $payload = null;
      list($encoded_sig, $payload) = explode('.', $_REQUEST['signed_request'], 2);
      $sig = base64_decode(strtr($encoded_sig, '-_', '+/'));
      $data = json_decode(base64_decode(strtr($payload, '-_', '+/'), true));
      if($data->page->liked) {
          echo "This content is for Fans only!";
        } else {
          echo "Please click on the Like button to view this tab!";
        }
    }

并且不要在论坛上发布您的应用程序密钥，请尽快编辑您的帖子。