How to get stats of multiple campaigns in Facebook ads api - facebook-php-sdk

Question

I write the below code for retrieve single campaign stats.
$fields = array(
'start_time','actions','spent','clicks','impressions','end_time',
);
$params = array();
$campaign = new AdCampaign(123456);
$stats = $campaign->getStats($fields, $params);
here I can able to access the stats. But when use this function loop then I got issue like
Calling : $campaign = new AdCampaign($campaign_id);
Error : "An access token is required to request this resource"
But using graph API I can access the multiple campaigns stats at a time
https://graph.facebook.com/stats?ids=123,456,789&fields=start_time,actions,spent,clicks,impressions,end_time&access_token=...
I need it using Ads API .... Please solve it for me..

Answer 1

I think this is a missing feature from the SDK at the moment as you can only access stats relative to an object.
However, calling stats in a loop should not be a problem, assuming you instantiated the API class correctly.
use FacebookAds\Api;
use FacebookAds\Object\AdCampaign;
Api::init($app_id, $app_secret, $access_token);
$campaign_ids = array(...);
$fields = array(
'start_time',
'actions',
'spent',
'clicks',
'impressions',
'end_time',
);
$params = array();
$stats = array();
foreach($campaign_ids as $id) {
$campaign = new AdCampaign($id);
$stats[$id] = $campaign->getStats($fields, $params);
}
You could also just get all stats for all campaigns by using the getAdCampaignStats on AdAccount.