RewriteEngine on
# RewriteBaseの/2ch は自分の環境のパスに変更
RewriteBase /2ch/test/
RewriteRule bbs.cgi bbs.php
RewriteRule read.cgi(.*) read.php$1
SetEnvIf Request_URI "bbs.php$" CONTENT_TYPE=application/x-www-form-urlencoded