Facebook 图形 API 通过分页循环

Question

所以我正在使用这个脚本来循环访问给定页面的事件。突然发现已经不行了:(

我有一种感觉，这可能是一个错误，因为如果您选择任何页面，使用 access_token 查看事件，您将无法获取“下一个”分页 URL 的任何数据。例如尝试 apigee.com 中的 https://graph.facebook.com/evenightclub/events

有什么想法吗？

（$fid是页面对象id）

    try {
    $facebook = new Facebook(array(
      'appId'  => '<removed>',
      'secret' => '<removed>',
    ));
    $access_token = $facebook->getAccessToken();

    $events_data = array();
    $offset = 0;
    $limit = 5000;  
    $params = array('access_token' => $access_token);

    //fetch events from Facebook API
    $data = $facebook->api("$fid/events/?limit=$limit&offset=$offset", $params);
    $events_data = array_merge($events_data, $data["data"]);

    //loop through pages to return all results
    while(in_array("paging", $data) && array_key_exists("next", $data["paging"])) {
        $offset += $limit;
        $data = $facebook->api("$fid/events/?limit=$limit&offset=$offset", $params);
        $events_data = array_merge($events_data, $data["data"]);
    }}

Answer 1

您的代码对我有用，我所做的唯一一件事就是在将其与现有信息合并之前确保 count($data["data"]) > 0。所以它看起来像这样：

//loop through pages to return all results
while(in_array("paging", $data) && array_key_exists("next", $data["paging"])) {
    $offset += $limit;
    $data = $facebook->api("$fid/events/?limit=$limit&offset=$offset", $params);
    // make sure we do not merge with an empty array
    if (count($data["data"]) > 0){
        $events_data = array_merge($events_data, $data["data"]);
    } else {
        // if the data entry is empty, we have reached the end, exit the while loop
        break;
    }
}}

Answer 2

我已经使用此方法来获取用户的所有 Facebook 帖子。

$appId = env('FBAPP_ID');
$appSecret = env('FBAPP_SECRET_KEY');
$fb = new Facebook([
        'app_id' => $appId,
        'app_secret' => $appSecret,
        'default_graph_version' => 'v3.3'
]);

用户允许我的应用程序获取他/她的个人资料后收到的令牌

$access_token = $args['token'];//you need to pass here your token 获取用户详细信息

try {
            // Returns a `Facebook\FacebookResponse` object
            $response = $fb->get('/me?fields=id,name,birthday,email,location,picture', $access_token);
        } catch (Facebook\Exceptions\FacebookResponseException $e) {
            echo 'Graph returned an error: ' . $e->getMessage();
            exit;
        } catch (Facebook\Exceptions\FacebookSDKException $e) {
            echo 'Facebook SDK returned an error: ' . $e->getMessage();
            exit;
        }
        $graphUser = $response->getGraphUser();

        $fb_uid = $graphUser['id'];

现在尝试获取用户帖子

try {
    $fields = "id,message,picture,name,description,type,icon,created_time,from,object_id,attachments,source,full_picture";
    $userFeed = $fb->get("/$fb_uid/posts?fields={$fields}&limit=5", $access_token);
    $feedBody = $userFeed->getDecodedBody();
    $feedData = $feedBody["data"];
    if (isset($feedBody['paging']) && $feedBody['paging']['next']) {
        $nextPageData = $this->getNextPageFbPost($feedBody['paging']['next']);
        while ($nextPageData['paging'] && $nextPageData['paging']['next']) {
            $nextPageData = $this->getNextPageFbPost($nextPageData['paging']['next']);
            if (count($nextPageData["data"]) > 0) {
                $feedData = array_merge($feedData, $nextPageData["data"]);
            } else {
                break;
            }
        }
    }
} catch (FacebookResponseException $e) {
    echo 'Facebook returned an error: ' . $e->getMessage();
    exit();
} catch (FacebookSDKException $e) {
    echo 'Facebook SDK returned an error: ' . $e->getMessage();
    exit();
}

foreach ($feedData as $postData) {
      print_r($postData);
}

  function getNextPageFbPost($url)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_REFERER, '');
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_TIMEOUT, 10);
        $raw_xml = curl_exec($curl);
        $result = json_decode($raw_xml, true);
        return $result;
    }