header() must be before anything is writen on the page
  ----- Original Message ----- 
  From: Balaji Ankem 
  To: [EMAIL PROTECTED] 
  Sent: Tuesday, August 14, 2001 8:10 PM
  Subject: Fw: [PHP] Re: prob with session start



  Hi,Renze i tried u'r last solution first.But it is acting as same .no change.

  After that i tried u'r first solution i.e removing include and adding 
header("Location....");

  It is giving the following error message.
  Warning: Cannot add header information - headers already sent in 
c:\www\authentication.php on line 40

  Thanks and regards
  -Balaji
    ----- Original Message ----- 
    From: Renze Munnik 
    To: Balaji Ankem 
    Cc: [EMAIL PROTECTED] 
    Sent: Tuesday, August 14, 2001 2:26 PM
    Subject: Re: [PHP] Re: prob with session start


    I think I know what it is. The construction I mentioned to avoid the
    reloading used three pages to login: the login-page, the validation
    page and then some page that produces output to the user.
    What you do, is include that output page in the validation page
    (authentication.php). You shouldn't do that. Instead of the
    include('super.php') you should use header("Location: super.php")
    and instead of include('ordinary.php') you should use
    header("Location: ordinary.php"). If you include
    super.php/ordinary.php you still don't leave authentication.php.
    That means that one can still reload authentication.php. Then the
    browser asks for resubmitting the form. If you use header() instead
    of include() you actually leave authentication.php and go to a
    different page. The user can ofcourse reload that page, but that
    page wasn't actually the result of a form-submital so the page will
    then just be reloaded and no information will be resubmitted. Even
    if one pushes Back from that page, he/she will not go back to
    authentication.php but to login.html. And gone is your problem.

    I think this should be your solution...


    Oh... btw:

    in authentication.php:
      session_register('$emp_id');
    should be:
      session_register("emp_id");

    and in logout.php:
      session_unregister($emp_id);
    should be
      session_unregister("emp_id");

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