将dompdf库与codeigniter一起使用时出错

Question

我尝试使用dompdf库导出pdf文件，但是当我调用generateTitplePage（）方法时出现错误：未定义的变量号 mycode的：

 public function generateTitlePage()
{
    $uid = (int) $this->uri->segment(3, 0);
    $this->load->database();
    $query = $this->db->query("SELECT * FROM dosars WHERE id_dosar = $uid");
    if ($query->num_rows() > 0)
    {
        foreach ($query->result() as $row)
        {
           $number = $row['number'];
           $name = $row['name'];
           $surname = $row['surname'];
           $village = $row['village'];
        }
    }

    $html = $number;
    $this->load->library('dompdf_gen');

    $this->dompdf->load_html($html);
    $this->dompdf->render();
    $this->dompdf->stream("welcome.pdf");
}

帮助我请GUUE !!!!!!!!!!!!!!!存在解决方案????????逻辑应该工作