<?php header("Expires: Thu, 01 Dec 2003 16:00:00 GMT"); header("Cache-Control: no-cache, must-revalidate"); header("Pragma: no-cache"); // The XHR response contains word 'Привет!' (Hello!), in koi8-r encoding (with http header) or in utf8. // It should always be decoded as 'Привет!', regardless of the parent document/worker encoding. $charset=$_GET['charset']; if ($charset == "koi8-r") { header("Content-Type: text/plain; charset=koi8-r"); print("XHR: \xF0\xD2\xC9\xD7\xC5\xD4"); } else { header("Content-Type: text/plain;"); print("XHR: Привет"); } ?>