{
    ...
    "require": {
        ...
        "gladyshev/yandex-direct-client": "*"
    }
    ...
}

use Yandex\Direct\Client;

$api = new Client('***login***', '***token***');

$response = $api->campaigns->get(
    ['Ids' => [123545345, 23423234]],  // SelectionCriteria
    ['Status', 'Currency', 'Funds']    // FieldNames
);

print_r($response);
  
// [
//     'request_id' => 1234567890,
//     'units' => [
//         'debit' => 10, 
//         'limit' => 50,
//         'rest' => 100500
//     ],
//     'result' => [...]
// ]