Handling url's

[eluser]jacobson[/eluser]
what will be the difference in using this serialized array and juz passing another argument value1-value2 which will be exploded?

I have another problem... I created basic controller

Code:

class mycontroller extends CI_Controller {
    function __construct(){
        parent::__construct();
        echo $this->uri->segment(2);
    }
}

I try to go localhost/mycontroller/value1-value2

After that i get 404 error (because there's method value1-value2) but under the error i get the "value1-value2". What can I do to make this request without error.