php - Codeigniter routes with arguments -

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i want wont work, means doing wrong.

$route['print/:num'] = "user/doprint/goprint/:num";

let me explain. have controller doprint under user folder , goprint method inside doprint accepts id argument. dont want users visit mydomain.com/user/doprint/goprint/2. want them visit mydomain.com/print/2.

my controller below 

class doprint extends user_controller {      public function index()     {         $data['subview'] = 'print';         $this->load->view('main_layout', $data);     }      public function goprint($id=null)     {         $data['model'] = $this->usermodel_model->get($id);          $data['subview'] = 'print';         $this->load->view('main_layout', $data);     }  }

the route rule syntax (per documentation):

$route['print/(:num)'] = "user/doprint/goprint/$1";

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