Language variant redirect does not respect priorities

[mabar]

When I open links like https://www.php.net/stat, it opens chinese version of documentation.

It is caused by header Accept-Language: cs,en;q=0.9,fr;q=0.8,zh-CN;q=0.7,zh;q=0.6
When I change it to Accept-Language: cs,en;q=0.9,fr;q=0.8 (remove chinese), it sends me to english version
That is not expected, because language should be chosen by priority - czech (no q parameter is implicitly 1, highest), english, french and then chinese. Czech is not supported by php.net, therefore english version should open.

This is proper implementation that returns supported language that has the highest priority: https://github.com/nette/http/blob/a02f3d131f8a5dbd573244a6813ed316cde8d6ad/src/Http/Request.php#L308-L335
Here is proof: https://3v4l.org/UJnKb#vnull

Possibly related to #435

I have fresh Windows 11 and Opera installation and for some reason french and chinese were added without me doing that and seeing chinese docs when my system is set to czech and english was really confusing.

I don't feel quite confident with the website codebase, so this will hopefully allow you to fix the current behavior. Thank you

[cmb69]

Yeah, there is certainly room for improvement. Maybe Locale::acceptFromHttp() would already do (assuming that ext-intl would be available).

Anyway, note that there is a link "My PHP.net" on the bottom of the pages, where you can select your preferred language for php.net (that is stored in a cookie, and will override any other settings), and more.

[mabar]

The function from intl unfortunately doesn't let you choose only from locales supported by the project. In my case it would return null

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Page footer is an unfortunate place for user settings, including its name. Never in 12 years of visiting the site have I thought about checking it.

[sy-records]

I will submit a PR to fix it later.