環境変数のリスト
[HTTP_HOST] pitecan.com
[HTTP_USER_AGENT] Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; ja-JP-mac; rv:1.9.0.8) Gecko/2009032608 Firefox/3.0.8
[HTTP_ACCEPT] text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
[HTTP_ACCEPT_LANGUAGE] ja,en-us;q=0.7,en;q=0.3
[HTTP_ACCEPT_ENCODING] gzip,deflate
[HTTP_ACCEPT_CHARSET] UTF-8,*
[HTTP_KEEP_ALIVE] 300
[HTTP_CONNECTION] keep-alive
[HTTP_CACHE_CONTROL] max-age=0
[PATH] /sbin:/usr/sbin:/bin:/usr/bin
[SERVER_SIGNATURE] 
Apache/2.2.9 (Fedora) Server at pitecan.com Port 80
[SERVER_SOFTWARE] Apache/2.2.9 (Fedora) [SERVER_NAME] pitecan.com [SERVER_ADDR] 210.143.110.224 [SERVER_PORT] 80 [REMOTE_ADDR] 133.27.61.16 [DOCUMENT_ROOT] /www/www.pitecan.com [SERVER_ADMIN] webmaster@pitecan.com [SCRIPT_FILENAME] /env.cgi [REMOTE_PORT] 60478 [GATEWAY_INTERFACE] CGI/1.1 [SERVER_PROTOCOL] HTTP/1.1 [REQUEST_METHOD] GET [QUERY_STRING] exp=123+456 [REQUEST_URI] /env.cgi?exp=123+456 [SCRIPT_NAME] /env.cgi