$mng = new MongoDBDriverManager("mongodb://usernamer:password@localhost:27017/dbname");
$bulk = new MongoDBDriverBulkWrite;

$bulk->update(['username' => $username], ['username' => $username, 'useraddress' => $useraddress], ['upset' => 'true']);
$mng->executeBulkWrite("dbname.registration", $bulk);
$mng->executeBulkWrite("browser.online", $bulk);

$filter = ['email' => $email];//filter to apply specific query
     $options = [
        'projection' => ['_id' =>0,'email'=>1],
     ];
     $query = new MongoDBDriverQuery($filter, $options);//spl query inserted here
     //$queryAllData = new MongoDBDriverQuery([]);// show all data query
     $Queryresponse = $conn->executeQuery("task1.user", $query)->toArray();// $conn contains the connection