数组中未定义的变量

Question

当我想从每个这个数组中获取来自数据库的信息来访问数组时，我得到了这个错误Undefined variable nik

查看

foreach ($data as $user) {
  $id_user = $user->id_user;
  $nama = $user->nama;
  $nik = $user->nik;
  echo $nik;
  $alamat = $user->alamat;
  $no_telp = $user->no_telp;
  $pass = md5($user->password);
  $name = $user->name;
}

控制器

public function user_akun_detail() {
  $id_user = $this->input->get('id');
  $detail['data'] = $this->Madmin->user_akun_detail($id_user);
  $this->load->view('admin/Detail_user_pemilih', $detail);
  $this->session->set_flashdata('id_user', $id_user);
}

模型

public function user_akun_detail($id_user) {
  $this->db->select('*');
  $this->db->from('akun');
  $this->db->join('detail_user', 'detail_user.id_user = akun.id_user');
  $this->db->join('image_user', 'akun.id_user = image_user.id_user');
  $this->db->where('akun.id_user', $id_user);
  $query = $this->db->get();
  return $query->result();
}