For those of you who wants to use JSON with PHP4 to process russian KOI8-r text, please read the following article:
http://yozhek10nozhek.livejournal.com/5842.html (in russian)
Maybe it is neither completed yet nor professionally-written, but it doesn't aim to be some kind of full-featured manual.
Note,
that you must have iconv extension loaded to use it; json extension is not needed, I use Services_JSON (
http://pear.php.net/pepr/pepr-proposal-show.php?id=198) implementation.
צריך להתקין משהו בPHP4