cdaftar(controller)

Class cdaftar

public function simpan()
    {
        $dbconnect = $this->load->database();
        $this->load->model('mdaftar');
        $this->load->library('upload');
        $nmfile = "file_".time();
        $config['upload_path'] = './assets/uploads/';
        $config['allowed_types'] = 'gif|jpg|png|jpeg|bmp';
        $config['max_size'] = '2048';
        $config['max_width']  = '1288';
        $config['max_height']  = '768';
        $config['file_name'] = $nmfile;

        $this->upload->initialize($config);

        if ($this->upload->do_upload('nik'))
            {
                if($this->mdaftar->validation() == TRUE){
                $data1 = array (
                'nama_perusahaan'=> $this->input->post('namaperusahaan'),
                'alamat'=> $this->input->post('alamat'),
                'no_telepon'=> $this->input->post('notelp'),
                'email'=> $this->input->post('email'),
                'dokumen_perusahaan'=> $this->input->post('nik'),
                'username'=> $this->input->post('username'),
                'password'=> $this->input->post('password'),
                );
                    $this-> mdaftar->simpandaftar($data1);
                    redirect('cdaftar');
                }
                else{ $this->signup();
    }
    }
    }