(PECL mongo >=0.9.0)
MongoCursor::__construct — Create a new cursor
$connection
   , string $ns
   [, array $query = array()
   [, array $fields = array()
  ]] )
connection
     Database connection.
ns
     Full name of database and collection.
query
     Database query.
fields
     Fields to return.
Returns the new cursor.