php - Returning false $this->form_validation->run() when there is an empty input type="file" -

every time update settings , leaving input type="file" empty. $this->form_validation->run() returning false. did not use setrules , required it.

here code:

public function update_settings() {     $this->load->model('bus_owner_model');      $data = $this->bus_owner_model->get_business_data_id_by_row($this->session->userdata('id'));      $this->load->library('form_validation');      $this->form_validation->set_rules('business_name', 'business name', 'required|trim|xss_clean');     $this->form_validation->set_rules('type_of_business', 'type of business', 'required|trim');     $this->form_validation->set_rules('country', 'country', 'required|trim');     $this->form_validation->set_rules('address', 'address', 'required|trim');     $this->form_validation->set_rules('city', 'city', 'required|trim|alpha');     $this->form_validation->set_rules('email_address', 'email address', 'required|trim|valid_email');     $this->form_validation->set_rules('contact', 'contact', 'required|trim|numeric|min_length[7]');     $this->form_validation->set_message('is_unique', 'your email address been taken');      if($this->form_validation->run() == true)     {         $config['upload_path']      = "./_profile_images/";         $config['allowed_types']    = 'jpg|jpeg|gif|png';         $config['encrypt_name']     = "true";         $this->load->library('upload', $config);              if(!$this->upload->do_upload())         {              $this->bus_settings($this->upload->display_errors());         }else         {             $this->load->model('bus_owner_model');              $file_data = $this->upload->data();              $data = array(                 'company_name'      => $this->input->post('business_name'),                 'profile_img'       => $file_data['file_name'],                 'type_description'  => $this->input->post('type_of_business'),                 'country'           => $this->input->post('country'),                 'address'           => $this->input->post('address'),                 'state'             => $this->input->post('state'),                 'city'              => $this->input->post('city'),                 'email_address_c'   => $this->input->post('email_address'),                 'contact'           => $this->input->post('contact')             );              if($this->bus_owner_model->update_bus($data) == true)             {                 redirect('bus_owner/bus_settings');             }else             {                 $this->load->model('bus_owner_model');                 $this->load->model('user_model');                 $data['latlng']                                     = $this->bus_owner_model->get_latlng();                 $data['get_all_business_data_orderby_total_result'] = $this->bus_owner_model->get_all_business_data_orderby_total();                 $data['get_all_user_data_orderby_total_result']     = $this->user_model->get_all_user_data_orderby_total();                 $data['result_countries']                           = $this->bus_owner_model->get_countries();                 $data['get_business_data_result']                   = $this->bus_owner_model->get_business_data();                  $data = array('error' => 'unable upload files');                 $this->load->view('site_header', $data);                 $this->load->view('bus_owner_views/left_col_map_single');                 $this->load->view('left_col_static', $data);                 $this->load->view('bus_owner_views/right_col_settings', $data);                 $this->load->view('site_footer');                            }                    }                            } } 

it return it's page , nothing happened.

i think trying upload file , apply normal field validation on it.that's wrong way trying validate.because file field have different behaviour normal input field.try way file field.

public function update_settings() {    $config['upload_path'] = './uploads/';         $config['allowed_types'] = 'gif|jpg|png';         $config['max_size'] = '100';         $config['max_width']  = '1024';         $config['max_height']  = '768';          $this->load->library('upload', $config);          if ( ! $this->upload->do_upload())         {             $error = array('error' => $this->upload->display_errors());               redirect('bus_owner/bus_settings');         }         else         {             $data = array('upload_data' => $this->upload->data());              $this->load->view('upload_success', $data);         } }. 

for more details goto link.