public string userLoginFile = "http://localhost/UserLogin.php?";

        string username = "";
        string password = "";
        string email;

    public void LoginGUI()
        {
           GUI.skin = this.guiSkin;

           username = GUI.TextField (new Rect(Screen.width / 2 - 110, Screen.height / 2 - 20, 220, 30), username, GUI.skin.GetStyle("textfield"));
           password = GUI.PasswordField (new Rect(Screen.width / 2 - 110, Screen.height / 2 + 15, 220, 30), password, "*"[0], GUI.skin.GetStyle("textfield"));
           if(GUI.Button (new Rect(Screen.width / 2 - 110, Screen.height / 2 + 50, 220, 30), "Login", GUI.skin.GetStyle("button")))
           {
             StartCoroutine(LoginUser(username, password));
           }

           GUILayout.Label(email);
        }

        IEnumerator LoginUser(string user, string pass)
        {
           WWW login = new WWW(userLoginFile + "username=" + user + "&password=" + pass);
           yield return login;

           if(login.error == null)
           {
             string[] credentials = login.text.Split('/');
             foreach (string str in credentials)
             {
              string[] creds = str.Split('=');

              for(int i=0; i < creds.Length; i++)
              {
                  if(creds[i] == "email")
                  {
                     email = creds[i + 1];
                     this.currentGUIMethod = MainMenuGUI;
                  }
              }
             }
           }
        }