Codeigniter Query Strings

[eluser]metaltapimenye[/eluser]
i found it..

..and tried it.. for sure 'query string' development in CI havent end yet.

Code:

function something(){#i still cannot get the way to put argument in it
  $a=$this->input->get('a');
  $b=$this->input->get('b');
  return $a.$b;}