$_SERVER

$_SERVER['PHP_SELF'];

$_SERVER['SERVER_NAME'];

$_SERVER['HTTP_HOST'];

$_SERVER['HTTP_REFERER'];

$_SERVER['HTTP_USER_AGENT'];

$_SERVER['SCRIPT_NAME'];

$_SERVER['GATEWAY_INTERFACE'];

$_SERVER['SERVER_ADDR'];

$_SERVER['SERVER_NAME'];

$_SERVER['SERVER_SOFTWARE'];

$_SERVER['SERVER_PROTOCOL'];

$_SERVER['REQUEST_METHOD'];

$_SERVER['REQUEST_TIME'];

$_SERVER['QUERY_STRING'];

$_SERVER['HTTP_ACCEPT'];

$_SERVER['HTTP_ACCEPT_CHARSET'];

$_SERVER['HTTP_HOST'];

$_SERVER['HTTP_REFERER'];

$_SERVER['HTTPS'];

$_SERVER['REMOTE_ADDR'];

$_SERVER['REMOTE_HOST'];

$_SERVER['REMOTE_PORT'];

$_SERVER['SCRIPT_FILENAME'];

$_SERVER['SERVER_ADMIN'];

$_SERVER['SERVER_PORT'];

$_SERVER['SERVER_SIGNATURE'];

$_SERVER['PATH_TRANSLATED'];

$_SERVER['SCRIPT_NAME'];

$_SERVER['SCRIPT_URI'];