CodeIgniter: Call to a member function WriteHTML() on a non-object

问题

I am getting this error when I an downloading a pdf file using MPDF. I am loading the code here below:

    $html = $this->load->view('customer/case_report',$this->data, true);
    $pdfFilePath = "output_pdf_name.pdf";
    $this->load->library('M_pdf');
    $this->M_pdf->pdf->WriteHTML($html);
    $this->M_pdf->pdf->Output('CaseReport_CaseNo_'.$caseNo.'.pdf', 'D');

UPDATE Attaching screenshot here:

Any help will be greatly appreciated. Thank you

回答1:

Alright I have Simulated the case and what Worked is as follows

Downloaded Library from mPDF Library using Codeigniter

Placed it in application/third_party. Created a File M_pdf.php in application/libraries

<?php
  if (!defined('BASEPATH')) exit('No direct script access allowed');
  include_once APPPATH.'/third_party/mpdf/mpdf.php';

  class M_pdf {

    public $param;
    public $pdf;
    public function __construct($param = "'c', 'A4-L'")
    {
      $this->param =$param;
      $this->pdf = new mPDF($this->param);
    }
 }
?>

Created a Test function in My Controller to test. At first I was trying to save it and getting an error like

But then I replace the F switch in Output with D for download

public function mdfTest()
{
  $pdfFilePath = time()."_order.pdf";
  $this->load->library('M_pdf');
  $html="<html><h1>This is test pdf</h1></html>";
  $this->m_pdf->pdf->WriteHTML($html);

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

}

And it worked. Created a PDF file like

回答2:

File Name : libraries/M_pdf.php
Folder Name : third_party/mpdf

include_once APPPATH.'/third_party/mpdf/mpdf.php';

class M_pdf {

public $param;
public $pdf;

public function __construct($param = '"en-GB-x","A4","","",10,10,10,10,6,3')
{
    $this->param =$param;
    $this->pdf = new mPDF($this->param);
}

}

Controller File

    public function pdf_create()
    {
        $this->load->library('M_pdf');
        $pdffile = time()."_order.pdf";
        $this->m_pdf->pdf->WriteHTML("My First Codeigniter in First Pdf 
        Create.");
        $this->m_pdf->pdf->Output($pdffile, "I");
    }

https://i.stack.imgur.com/eplfX.png

来源：https://stackoverflow.com/questions/42777786/codeigniter-call-to-a-member-function-writehtml-on-a-non-object

标签

php

codeigniter

mpdf