PHP: RFC-2231 How to encode UTF-8 String as Content-Disposition filename

Question

Scenario: (in PHP) I have a form submission with a UTF-8 encoded string ($name) to support international characters. Upon submitting the form (

Answer 1

It is enough to encode the file name according to RFC 3986 by using rawurlencode()

So all you need to do is change the header() line to:

header("Content-Disposition: attachment; filename*=UTF-8''".rawurlencode($name));

To answer the questions directly:

1. The format is right but the text inside $name needs to be encoded with rawurlencode().
2. rawurlencode() does the trick.