Detect codepage to use, read it from system? (for ZIP files)

[Sonnich]

I am moved a clients system from one ISP running PHP5.5 to a new ISP running PHP7.2

My problem is coding of filenames when I create zip files, with non English letters. I found this to work with CP775.

$dl[$z]=iconv("UTF-8", "CP775//TRANSLIT", $dl[$z]);
            $zip->addFile($file, implode("/", $dl));

Now, would it be possible to detect what CP to use from the system?

I found mb_detect_encoding but it does not tell me much.

[gw1500se]

Will utf8-decode help?

[Sonnich]

No, that is not what I am looking for.

I made a script so I could try multiple Codepages at once, for the download, and started figuring out which one it right. Knowing that I am in the Baltics then 775 and 1257 were obvuious choices after some failures, and it work - here for now. But how can I get to know what CP to use in other cases?

Using no CP conversion on one server causes the filenames to contain wrong charactes, e.g. ü becomes _ (underscore) etc.

On another server it is not an issue and I can use the filename directly

[requinix]

Make sure PHP is being run with the correct locale, then retrieve it.

Note that's not a complete answer. You'll need to investigate and test a little.