使用php sdk登录facebook并不会返回有效的$ user

Question

我试图只使用php sdk登录facebook应用程序。 为什么php身份验证不起作用。 - ＆GT;的getUser（）;始终返回零。

    <?php


// 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');
require_once('sdk/src/facebook.php');

$facebook = new Facebook(array(
  'appId'  => AppInfo::appID(),
  'secret' => AppInfo::appSecret(),
  'sharedSession' => true,
  'trustForwarded' => true,
        'cookie' => true
));



$auth_url = $facebook->getLoginUrl(array(
        'scope' => 'email,publish_stream'       
));

$user = $facebook->getUser();

if (empty($user)) {
    echo("<script> top.location.href='" . $auth_url . "'</script>");
} else {
    echo ("Welcome User: " . $user);
}

?>

Answer 1

您没有将acces_token设置为facebook对象。当用户在身份验证后重定向到您的网页时，您应该在$facebook对象中设置用户access_token，然后调用$facebook->getUser()

你可以这样做：

if(isset($_GET['code'])){
  $access_token = $facebook->getAccessTokenFromCode($_GET['code']);
  $facebook->setAccessToken($access_token);
}
$user = $facebook->getUser();