$_Server

<?php
echo $_SERVER['SERVER_PORT']."<br/>";
echo $_SERVER['REMOTE_PORT']."<br/>";
echo $_SERVER['SERVER_ADMIN']."<br/>";
echo $_SERVER['PHP_SELF']."<br/>";
echo $_SERVER['GATEWAY_INTERFACE']."<br/>";
echo $_SERVER['SERVER_ADDR']."<br/>";
echo $_SERVER['SERVER_NAME']."<br/>";
echo $_SERVER['SERVER_SOFTWARE']."<br/>";
echo $_SERVER['SERVER_PROTOCOL']."<br/>";
echo $_SERVER['REQUEST_METHOD']."<br/>";
echo $_SERVER['REQUEST_TIME']."<br/>";
echo $_SERVER['QUERY_STRING']."<br/>";
echo $_SERVER['DOCUMENT_ROOT']."<br/>";
echo $_SERVER['HTTP_ACCEPT']."<br/>";
echo $_SERVER['HTTP_ACCEPT_CHARSET']."<br/>";
echo $_SERVER['HTTP_ACCEPT_ENCODING']."<br/>";
echo $_SERVER['HTTP_ACCEPT_LANGUAGE']."<br/>";
echo $_SERVER['HTTP_CONNECTION']."<br/>";
echo $_SERVER['HTTP_HOST']."<br/>";
echo $_SERVER['HTTP_REFERER']."<br/>";
echo $_SERVER['HTTP_USER_AGENT']."<br/>";
echo $_SERVER['HTTPS']."<br/>";
echo $_SERVER['REMOTE_ADDR']."<br/>";
echo $_SERVER['REMOTE_HOST']."<br/>";
echo $_SERVER['SCRIPT_FILENAME']."<br/>";
echo $_SERVER['SERVER_ADMIN']."<br/>";

echo $_SERVER['SERVER_SIGNATURE']."<br/>";
echo $_SERVER['PATH_TRANSLATED']."<br/>";
echo $_SERVER['SCRIPT_FILENAME']."<br/>";
echo $_SERVER['SCRIPT_NAME']."<br/>";
echo $_SERVER['REQUEST_URI']."<br/>";
echo $_SERVER['PHP_AUTH_DIGEST']."<br/>";
echo $_SERVER['PHP_AUTH_USER']."<br/>";
echo $_SERVER['PHP_AUTH_PW']."<br/>";
echo $_SERVER['AUTH_TYPE']."<br/>";
echo $_SERVER['ORIG_PATH_INFO']."<br/>";
echo $_SERVER['PATH_INFO']."<br/>";
?>