login form php codeigniter

? php class Auth extends CI_Controller { public function index () { show_404(); } public function login () { $this- load- model ('auth_model'); $this- load- library ('form_validation'); $rules = $this- auth_model- rules (); $this- form_validation- set_rules ($rules); if ($this- form_validation- run == FALSE){ return $this- load . gbk slot login