Question

    $source_path = 'https://bip.wzp.pl/attachments/' . $filename;  


    $opts = array(
      'http'=>array(
        'method'=>"GET",
        'header'=>"Content-type: application/pdf",
      )
    );

   $context = stream_context_create($opts);    

    $data = file_get_contents($source_path, false, $context);

    if(($handle = fopen($dest_path, "w"))) {
        fwrite($handle, $data);
        fclose($handle);
        return $filename_converted;
    }

$source_path is e.g:

https://bip.wzp.pl/attachments/28172_Statut Województwa
Zachodniopomorskiego.pdf

When I trying it browser, a pdf document displayes properly.

But downloaded file via PHP, it is always corrupted.

EDIT

I checked $data content. It has front page html :/
It strange putting $source_path to browser returns pdf

Answer 1

Seems like you try to download a PDF, try saving it as a binary file using:

fopen($dest_path, "wb")