MPDF致命错误：在null上调用成员函数WriteHTML（）

Question

我想将导出数据导入pdf文件，所以我尝试使用mpdf。我正在按照其教程的一步一步，但我收到错误

Fatal error: Call to a member function WriteHTML() on null in C:\xampp\htdocs\laboratorium\application\controllers\beranda.php on line 506

在控制器中

$this->load->library('M_pdf');
    $this->load->model('mod');
    $data['result'] = $this->mod->getReport();

    $html = $this->load->view('report', $data);
    $this->M_pdf->pdf->WriteHTML($html);

    //download it.
    $this->m_pdf->pdf->Output($pdfFilePath, "D");   

我确信$html不是空的。我尝试加载它，它正在工作。为什么会这样？

Answer 1

试试这个

   $this->load->library('M_pdf');
    $this->load->model('mod');
    $data['result'] = $this->mod->getReport();

    $html = $this->load->view('report', $data,true);
    $this->m_pdf->pdf->WriteHTML($html);

    //download it.
    $this->m_pdf->pdf->Output($pdfFilePath, "D");