mpdf error - preg_replace (): The / e modifier is deprecated, use preg_replace_callback instead


i'm using MPDF to generate pdf files in codeigniter.

my controller function look like

   function save_pdf($std_id)
     $data['section1_report']= $this->common_model->get_details('tbl_section1',array('id'=>$std_id));
     $html = $this->load->view('reports/section1',$data,true);
      // print_r($html);exit;
     $pdf = $this->pdf->load();

my pdf library is

 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
   class pdf {
      function pdf()
         $CI = & get_instance();
         log_message('Debug', 'mPDF class is loaded.');

     function load($param=NULL)
         include_once APPPATH.'/mpdf/mpdf.php';
         if ($params == NULL)
             $param = '"en-GB-x","A4","","",10,10,10,10,6,3';
       return new mPDF($param);

i want to generate pdf file from the view file section1. but when i call the controller function save_pdf , i got the errors as below

when i print_r($html);exit; , it displays all the contents from the view file.i used preg_replace_callback instead of preg_replace in mpdf/includes/functions.php but it's still showing error like this

i studied the mpdf documentation and it's working correctly in plain php. but i want to generate pdf file in Codeigniter. how to solve such errors in mpdf? I would appreciate any help where i can generate pdf file using mpdf in Codeigniter. thank you.

Try replacing lines 79 and 80 of functions.php with this:

$str = preg_replace_callback('/\&\#([0-9]+)\;/m', function($m) use ($lo){return code2utf($m[1],$lo); }, $str);
$str = preg_replace_callback('/\&\#x([0-9a-fA-F]+)\;/m', function($m) use ($lo){return codeHex2utf($m[1],$lo);}, $str);