// set parameters
$startTime = "2023-10-01";
$endTime = "2023-11-01";
$smsType = "all";
$countryType = "domestic";
try {
    $resp = $this->client->listStatistics($startTime, $endTime, $smsType, $countryType);
} catch (Exception $exception) {
    print_r($exception);
}