Google Drive API calls for PHP

function newfolder($drive_service){
$fileMetadata = new Google_Service_Drive_DriveFile(array(
  'name' => 'Testordner',
  'mimeType' => 'application/vnd.google-apps.folder'));
$file = $drive_service->files->create($fileMetadata, array(
  'fields' => 'id'));
printf("Folder ID: %s\n", $file->id); }

function ($drive_service) {
$folderId = 'xxxxxxxxxxx';
$fileMetadata = new Google_Service_Drive_DriveFile(array(
  'name' => 'test.pdf'
));
$content = file_get_contents('doc.pdf');
$file = $drive_service->files->create($fileMetadata, array(
  'data' => $content,
  'mimeType' => 'application/pdf',
  'uploadType' => 'multipart',
  'fields' => 'id'));
printf("File ID: %s\n", $file->id);}