dompdf render pdf doesnt work on codeigniter

Question

This code works but the resulting file is being opened like HTML for me not as a pdf or download pdf. How can I fix that?

<?php
require_once("dompdf/dompdf_config.inc.php");
//var_dump("dompdf/dompdf_config.inc.php");
$tiket = $_GET["tiket"];
$file = $this->load->view('admin/report/fm-it-01',$tiket); 

$dompdf = new DOMPDF();
//var_dump($dompdf->load_html($file));
$dompdf->load_html_file($file);
$dompdf->render();
$dompdf->stream("sample.pdf"); ?>

Answer 1

Try $dompdf->load_html($file); instead of $dompdf->load_html_file($file);