Hello, the problem is a very specific case, although I am not sure what's causing it.
I have a local server environment which uses:
- Windows 10 x64
- Apache 2.4.25 x64
- PHP 7.4.11
- Dompdf 1.0.2
I use the dompdf library (tried both via composer and as a required library) to generate PDFs with user data. A basic example of code would be something like this:
PHP Code:
public function test()
{
$dompdf = new \Dompdf\Dompdf();
$dompdf->loadHtml('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html;charset=utf-8"><title>Solicitud en PDF</title></head><body><h1>Hola</h1></body></html>');
$dompdf->setPaper('Letter', 'portrait');
// Render the HTML as PDF
$dompdf->render();
// Output the generated PDF to Browser
$dompdf->stream("test.pdf",array('Attachment'=>0));
}
Now on my local server, using both via composer and as a required library, this process works fine and I get this:
![[Image: testpdf.png]](https://www.minkov.mx/~ups/testpdf.png)
On the other hand, my production environment has:
- Ubuntu 20.04 LTS
- Apache 2.4.41 - Apache uses FPM and http/2
- PHP 7.4.3
- Dompdf 1.0.2
I thought this part was working, but then I started getting reports that users are not getting PDFs but scrambled letters and symbols. So I tried to see what's happening and I got this.
![[Image: testpdferror.png]](https://www.minkov.mx/~ups/testpdferror.png)
This literally comes out as the PDF code.
If I copy this function outside my CodeIgniter instance on the same server, just using a regular php file and requiring the library, there's no problem. So, for some reason I get a problem when those three are combined:
- CodeIgniter 4.1.1
- PHP 7.4 FPM
- DomPDF 1.0.2
As I said before if I remove CodeIgniter from this combination on the production server it works.
I also tried with PHP 8, to check if it was a PHP issue, same result.
My theory is that it might be some header issue, because the file is output as text and not PDF.
