controller

public function proses_edit()
	{
      //jika tidak ada poto yang di upload
	if (empty($_FILES['foto']['name']))
		{

		$data=array('ket'=>$this->input->post('judul'));

		$condition['id_wall'] = $this->input->post('id_wall');

		$this->wallpaper_model->updateProject($data,$condition);

		redirect ('admin/wallpaper');

	   }
 //ada poto yang di upload
	else
{

$this->form_validation->set_rules('judul', 'Judul', 'required');
if ($this->form_validation->run() == FALSE)
    {
       $data['errors'] = validation_errors();
        $this->load->view("admin/tambah_wallpaper",$data);
      }
    else
 {
       $config['upload_path'] = './image/wallpaper';
        $config['allowed_types'] = 'gif|jpg|png';
        $config['max_size']    = '1000';
        $config['max_width']  = '1024';
        $config['max_height']  = '768';
      $this->upload->initialize($config);
     if(!$this->upload->do_upload('foto'))
     {
     $data['errors'] = $this->upload->display_errors();
     $this->load->view('admin/tambah_wallpaper',$data);
      }
 else
	 {
 $upload = $this->upload->data();
$foto = $upload['file_name'];
 $data=array('ket'=>$this->input->post('judul'),																														'wall'  => $foto);																$condition['id_wall'] = $this->input->post('id_wall');

//script sampean															unlink("image/wallpaper" . $this->input->post('old_image'));

																$this->wallpaper_model->updateProject($data,$condition);

redirect('admin/wallpaper');
                                                            }
                                                    }

			}

	}



//model
function updateProject($data, $condition)
{
$this->db->where($condition);
$this->db->update('tabel_wall', $data);
}