DOMPDF, I cannot create two pdf at time

Question

When i try to create two pdf at a time it's throwing errors...

Fatal error: Uncaught exception 'DOMPDF_Exception' with message 'No block-level parent found. Not good.' in C:\wamp\www\si2i\application\libraries\dompdf\include\inline_positioner.cls.php on line 38 ( ! ) DOMPDF_Exception: No block-level parent found. Not good. in C:\wamp\www\si2i\application\libraries\dompdf\include\inline_positioner.cls.php on line 38

here is the code:

$this->load->library('pdf');
                    $this->pdf->set_base_path($data['path']);
                    $this->pdf->load_view('adm/invoice/si2i',$data);
                    $this->pdf->render();
                    $output = $this->pdf->output();
                    file_put_contents("uploads/invoice/invoice_".$invoice_file_name.".pdf", $output);

$this->load->library('pdf');
                    $this->pdf->set_base_path($data['path']);
                    $this->pdf->load_view('adm/invoice/si2i',$data);
                    $this->pdf->render();
                    $output = $this->pdf->output();
                    file_put_contents("uploads/invoice/invoice_".$invoice_file_name.".pdf", $output);

Please help me out..

Thanks in advance...

Answer 1

I just faced the same problem. The solution is that the codeigniter pdf library $this->load->library('pdf'); creates a single DOMPDF instance that is called every time, however the class doesn't clean up after itself properly, so crashes if you need to generate more than one pdf.

The solution is to manually instantiate the DOMPDF class as you need it. Don't use the codeigniter pdf wrapper.

//require at the top of our script
require_once(APPPATH .'libraries/dompdf/dompdf_config.inc.php');

//get the html first (base dompdf cant do the combined load/render)
$view = $this->load->view("viewname", $viewData, true);
//create a new dompdf instance (this is the crucial step)
$this->pdf = new DOMPDF();
//render and output our pdf
$this->pdf->load_html($view);
$this->pdf->render();
$pdf = $this->pdf->output(array("compress" => 0));
file_put_contents("some/file/path.pdf", $pdf );