filesize() error for comment in file

[postwirt]

If a comment is written at the very beginning of a file (tried for a css and a js file), then you run into an filesize() error by trying to zip it. The comment is written like /*Comment*/

[jszobody]

It sounds like you're adding the raw file contents directly to the Zip, is that correct?

If so, use the ->addRaw($content, $filename) method instead of the catch-all ->add(...) method. The add method tries to guess what you are adding, and that initial slash makes it look like a path on disk.

[postwirt]

yes, that is correct.

I tried and it is working. So it was my fault.
Thanks for the answer.