处理来自Facebook图形API的数据

Question

I am trying to handle Facebook advertising data recieved via a batched request.

$requests = [
        $fb->request("GET", "act_XXXX/insights/?fields=account_id,spend,campaign_id,campaign_name&level=campaign&date_preset=last_30_days"),
        $fb->request("GET", "act_XXXX/insights/?fields=account_id,adset_name,adset_id,spend&level=adset&date_preset=last_30_days"),
        $fb->request("GET", "act_XXXX/insights/?fields=account_id,adset_name,campaign_name,ad_name,spend&level=ad&date_preset=last_30_days"),
    ];

This works as intended and the result I get back with $res = $response->getBody(); is like ( with var_dump($res); ):

string '{"data":[{"account_id":"895282637172047",.....
string '{"data":[{"account_id":"895282637172047",.....
string '{"data":[{"account_id":"895282637172047",.....

All with different data based on campaign, adset or ad.

Here my problem arrises, because I want handle the 3 different JSON's differently.

So my question is how I can differentiate them so I can do something like

foreach($data1 as $datas) {

}

foreach($data2 as $datas) {

}

foreach($data3 as $datas) {

}