codeigniter - Display .pdf doecument from folder in php -

i want display .pdf file in codeigniter using mpdf.

iframe, object , embed tag not working.

scenario:

-click on button pdf file open in new tab. if .jpg file showing in pdf if ".pdf" file not showing in open pdf file.

here pdf structure:-

        $body="";         $this->load->library('mpdf/mpdf.php');         $mpdf=new mpdf();         $mpdf->setdisplaymode('real');         $mpdf->setautopagebreak(true);          $body.=$this->load->view('test.php',$data,true);         }         $mpdf->writehtml($body);          $mpdf->setdisplaymode('fullpage');          $mpdf->list_indent_first_level = 0;           $mpdf->output();