cannot open pdf file generated using dompdf

问题

i am trying to generate a pdf file from smarty template using dompdf:code is below:-

require_once('dompdf/dompdf_config.inc.php');
$dompdf = new DOMPDF();
$dompdf->load_html($smarty->fetch(CURRENT_TEMPLATE.'/module/shopping_cart.html'));
$dompdf->render();
$dompdf->stream("sample.pdf");

a pdf file is generated,but when i try to open the pdf file a error message is displaying as below "Acrobat cannot open the 'sample.pdf' because it is either not supported file type or because file has been damaged" HTML page is diplaying correctly when i try to

echo $smarty->fetch(CURRENT_TEMPLATE.'/module/shopping_cart.html')

so please help me to solve this error...thanks in advance

回答1:

yes this is an problem of dompdf. But I am able to overcome from this problem. I created a function for pdf creation. check below function:-

function pdf_create($html, $filename='', $stream=TRUE) 
{
    require_once("dompdf/dompdf_config.inc.php");
    $savein = 'uploads/policy_doc/';
    $dompdf = new DOMPDF();
    $dompdf->load_html($html);
    $dompdf->render();
    $canvas = $dompdf->get_canvas();
    $font = Font_Metrics::get_font("arial", "normal","12px");

    // the same call as in my previous example
    $canvas->page_text(540, 773, "Page {PAGE_NUM} of {PAGE_COUNT}",
                   $font, 6, array(0,0,0));

    $pdf = $dompdf->output();      // gets the PDF as a string

    file_put_contents($savein.str_replace("/","-",$filename), $pdf);    // save the pdf file on server
    unset($html);
    unset($dompdf); 

}

Note :- You need to get generated pdf as string then save it to pdf file.

EDIT :- You may delete the below part from above function:-

    $canvas = $dompdf->get_canvas();
    $font = Font_Metrics::get_font("arial", "normal","12px");

    // the same call as in my previous example
    $canvas->page_text(540, 773, "Page {PAGE_NUM} of {PAGE_COUNT}",
                   $font, 6, array(0,0,0));

this above code for handling multiple pages header.

回答2:

Use ob_end_clean(); before calling $dompdf->stream();.

回答3:

I also got same error but when I use ob_end_clean() before $dompdf->stream() it worked for me.

Below is my code.

$dompdf = new DOMPDF();
$dompdf->load_html($html); 
$dompdf->render();    
$pdf = $dompdf->output();
$invnoabc = 'Bokkinglist.pdf';
ob_end_clean();
$dompdf->stream($invnoabc);
exit;

回答4:

it works to me, at end my code looks like:

$html =
  '<html><body>'.
  '<p>Put your html here, or generate it with your favourite '.
  'templating system.</p>'.
  '</body></html>';
function pdf_create($html, $filename='', $stream=TRUE) 
{
    require_once('scripts/vendor/dompdf/dompdf/dompdf_config.inc.php');
    $savein = '';
    $dompdf = new DOMPDF();
    $dompdf->load_html($html);
    $dompdf->render();
    $canvas = $dompdf->get_canvas();
    $font = Font_Metrics::get_font("arial", "normal","12px");

    /*// the same call as in my previous example
    $canvas->page_text(540, 773, "Page {PAGE_NUM} of {PAGE_COUNT}",
                   $font, 6, array(0,0,0));*/

    $pdf = $dompdf->output();      // gets the PDF as a string

    file_put_contents("arquivo.pdf",$pdf);  // save the pdf file on server

    unset($html);
    unset($dompdf); 

}

pdf_create($html);

来源：https://stackoverflow.com/questions/20676160/cannot-open-pdf-file-generated-using-dompdf

标签

php

pdf-generation

smarty

dompdf