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Editorial Team
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Asked: 2026-06-17T17:21:03+00:00

I am generating a PDF document with a FPDF library. I am trying to

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I am generating a PDF document with a FPDF library.
I am trying to display a generated document in browser (Firefox, Chrome, Opera) but all i get are strange characters starting with:

%PDF-1.3 3 0 obj <>...

This is my code. I am trying to add two images to the document.

$pdf = new FPDF();
$pdf->AliasNbPages();
$pdf->AddPage();
$pdf->Image('./image.png',10,10,0,0,'png');
$pdf->Image('./image.png',10,120,0,0,'png');
$pdf->Output('file.pdf','I');

If I use the output with the ‘D’ option:

$pdf->Output('file.pdf','D');

and save the file on the disc, the pdf document is fine.

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1 Answer

  1. Editorial Team

    You probably need to add the correct content type header. When the web server serves up a file, it tries to give the correct content type header it guesses from the file, but here, as you’re generating it with PHP, the default header will be sent, which is usually text/html. Try adding this to the start of your code:

    header('Content-type: application/pdf');

    And it should send with the correct content type header.

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