string account = "bill";
                string password = "pass1000";
                string ip = new WebClient().DownloadString("http://icanhazip.com");

                ASCIIEncoding encoding = new ASCIIEncoding();
                string postData = "account=" + account + "&password=" + password + "&ip=" + ip;
                byte[] data = encoding.GetBytes(postData);

WebRequest request = WebRequest.Create("http://WEBSITE.COM/post.php");
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = data.Length;

                Stream stream = request.GetRequestStream();
                stream.Write(data, 0, data.Length);
                stream.Close();

if (isset($_GET['postData'])){
//insert account, password, ip, to my database.
}