RewriteEngine On

RewriteBase /

RewriteCond %{QUERY_STRING} ^id=([0-9]+)(.*)$

RewriteRule ^index.php /? [R=301,L]

http://domain.com/?topic=777


GET /?topic=777 HTTP/1.1
Host: domain.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: ru-ru,ru;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Cookie: __utmz=108405131.1210689752.36.7.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=nudist%20movie; AFFILIATEUtopic=unknown_reseller; __utma=108405131.1434240671.1209725010.1210736718.1210833515.39; __utmc=108405131; PHPSESStopic=ca50c393fd4c59b529fdcfabf841d94c

HTTP/1.x 301 Moved Permanently
Date: Thu, 15 May 2008 09:54:10 GMT
Server: Apache/1.3.34 (Unix) PHP/4.4.4
Location: http://domain.com/
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html; charset=iso-8859-1


GET / HTTP/1.1
Host: domain.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5

<?

echo $_SERVER['HTTP_REFERER'];

?>