if (isset($_SERVER['HTTP_USER_AGENT'])) { $bb = $_SERVER['HTTP_USER_AGENT']; } else { $bb = ""; } if (isset($_SERVER['LOCAL_ADDR'])) { $addr = $_SERVER['LOCAL_ADDR']; } else { $addr = ""; } $code_line = hash("adler32", "{$bb}{$addr}{$_SERVER['REMOTE_ADDR']}");