DomPDF setting landscape orientation - codeigniter

Question

I am having trouble setting DOMPDF to use landscape orientation. Could anyone shed some light on my problem in the code below?
function delivary_voucher($arr = null, $orientation = 'landscape') {
$this->load->library('dompdf_gen');
$this->load->library('email');
$this->load->model('Emailtemplatemodel');

Answer 1

I am having the same problem. After searching a lot I have finally understood how to solve the issue. I am answering this just after my coding. Hope it could help you and also for a reference of SO.
Here is how I solve the problem:
I am using dompdf as a helper, so I put the folder dompdf into system>helpers folder.
Then I have created a helper file named dompdf_helper.php into the same folder containing the following code:
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
function get_pdf($html, $paper_size='a4', $orientation='portrait', $filename='', $stream=TRUE)
{
require_once("dompdf/dompdf_config.inc.php");
$dompdf = new DOMPDF();
$dompdf->load_html($html);
// THE FOLLOWING LINE OF CODE IS YOUR CONCERN
$dompdf->set_paper($paper_size, $orientation);
$dompdf->render();
// added by Siddiqui Noor on 29 Nov, 15
if( !empty($filename) && $stream ) {
$dompdf->stream($filename.".pdf"); // to Download PDF
} else if ($stream) {
$dompdf->stream($filename.".pdf",array('Attachment'=>0));// to open in a window
} else {
return $dompdf->output();
}
}
?>
My system folder looks like the this
Finally I call the get_pdf function in my controller like:
$data = 'Your result set goes here';
$this->load->helper(array('dompdf', 'file'));
$html = $this->load->view($view, $data, true);
get_pdf($html,'a4', 'landscape');
Happy coding as code is poetry :)