Php 通过活动id获取ADSET

我正在使用这种方法为Facebook的活动标记API。它可以完美地工作：

$account = new AdAccount($account_id);

$campaigns = $account->getCampaigns(array(
        CampaignFields::ID,
        CampaignFields::NAME,
        CampaignFields::OBJECTIVE,
        CampaignFields::STATUS,
        CampaignFields::CREATED_TIME,
        CampaignFields::START_TIME,
        CampaignFields::STOP_TIME,
        CampaignFields::UPDATED_TIME,
    )
);

返回活动id。我正在尝试按活动id获取ADSET。
我正在使用此代码，但未返回任何内容：

$adsets = (new AdSet($camp_id))->read(array(
  AdSetFields::NAME,

));


foreach ($adsets as $adset) {
  echo '<br />--<br />';
  echo $adset->{AdSetFields::ID}.PHP_EOL;

  echo '<br />---<br />';

}

$AdSet=（新AdSet（$camp_id））->读取（数组）(
AdSetFields:：NAME，
));
foreach（$adset作为$adset）{
回音“
--
”；
echo$adset->{AdSetFields:：ID}.PHP_EOL；
回音“
--
”；
}

从一个广告活动中读取所有广告集

use FacebookAds\Object\AdCampaign;
use FacebookAds\Object\Fields\AdSetFields;

$adcampaign = new AdCampaign($adcampaign_id);
$adsets = $adcampaign->getAdSets(array(
  AdSetFields::NAME,
  AdSetFields::CAMPAIGN_STATUS
));

// This will output the name of all fetched ad sets.
foreach ($adsets as $adset) {
  echo $adset->name;
}

---

从一个广告活动中读取所有广告集

use FacebookAds\Object\AdCampaign;
use FacebookAds\Object\Fields\AdSetFields;

$adcampaign = new AdCampaign($adcampaign_id);
$adsets = $adcampaign->getAdSets(array(
  AdSetFields::NAME,
  AdSetFields::CAMPAIGN_STATUS
));

// This will output the name of all fetched ad sets.
foreach ($adsets as $adset) {
  echo $adset->name;
}