PHP language detection

Question

I\'m trying to build multilangual site.

I use this piece of code to detect users language. If you havent chosen a language, it will include your language file based

Answer 1

Your code looks just fine. You might want to add a final else default choice if the visitor asks for a language you aren't providing. Also, if the visitor himself selects a language you should save that choice in a persistent cookie and check its value, giving it precedence over HTTP_ACCEPT_LANGUAGE.

As far as I can tell Youtube does use HTTP_ACCEPT_LANGUAGE, but at the same time uses IP geolocation to suggest a change in language if the langauge of the visitor's country doesn't match that. Definitely annoying.

Just nitpicking: if you're gonna add languages to the list a switch() statement might be more readable.