链接到HTML中的PDF，该文件没有扩展名，但我知道如何正确打开它是pdf

Question

First post. I'm working on a project for a client where they have pdf files uploaded to a file structure (LAMP Stack) but the files have no extensions on them. Under the assumption that those files have to be PDF how would I get the browsers to understand that, and open them accordingly? Obviously with adding the file extensions this would suddenly work but I can't change the way their system works, it would result in too many changes and they are on a tight deadline. As for saving a temporary copy somewhere, I could do that, but I was hoping for a better solution. Is there a way to suggest to the browsers that they open a file a certain way?

Any thoughts guys/gals?

Answer 1

You just set the application type and file name in the headers, like so:

// This points to the file in question, note that it doesn't 
// care whether it has an extension on the name or not.
$filePathOnDisk = '/path/to/your/pdffile';

// You can make this whatever you like, it doesn't have to 
// be the same as the file name on the disk! This is the name of the file your end 
// user will see when they are asked if they want to save. open, etc in the browser.
$fileName = 'file.pdf'; 

$data = file_get_contents($filePathOnDisk); 
header("Content-type: application/pdf");
header("Content-disposition: attachment;filename=$fileName");
echo $data;

See PHP: stream remote pdf to client browser and Proper MIME media type for PDF files for reference as well.