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Session in Frames: why doesn't it work??

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  #1  
Old July 31st, 2003, 05:53 PM
harvey_r01 harvey_r01 is offline
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Question Session in Frames: why doesn't it work??
Hi all,

Probably a real simple prob for most of you, but...

I have 3 frames (header, navigation and main frame), most of it is static except a search facility and when the link is clicked on a login.php page is invokeed in the main frame. Its a real simple login...

The user types uname + pwd and then it checks your account if valid it will...

PHP Code:
 session_start();
$_SESSION['username'] = $uname;
header("Location:http://www.url_to_search_page.php"); 


The search page includes a file called sess.php which does...

PHP Code:
 session_start();
if (!isset($_SESSION['username']))  {
  // go back to login telling them the session has expired
}  else  {
  session_start();
} 


The page recognises the users account, tries to goe to the search page but then throws the user back to the login page saying session expired...

Would frames have an impact to the session? I have tried echoing the $_SESSION['username']; on the next page but it outputs nothing??

...Any ideas why?

Cheers,

Harvey
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  #2  
Old July 31st, 2003, 06:29 PM
jpenn jpenn is offline
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Quote:
Would frames have an impact to the session? I have tried echoing the $_SESSION['username']; on the next page but it outputs nothing??

You need to make sure that you are passing the SID around between the frames - you can add the sid in the frame src tag:
Code:
src="somepage.php?<?PHP echo( SID ); ?>"

You also need to make sure you are starting the session on the framed pages.
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  #3  
Old August 2nd, 2003, 10:44 PM
harvey_r01 harvey_r01 is offline
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Hi Joe,

thanks for the reply, but I don't understand why the session needs to be started on all pages?? If my main frame is the only frame accessing PHP pages and the other two frames stay static why is there a need to start the session? Sorry, but it would be nice to understand the reasoning...

thanks,

Harvey
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  #4  
Old August 3rd, 2003, 01:40 PM
jpenn jpenn is offline
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Quote:
If my main frame is the only frame accessing PHP pages and the other two frames stay static why is there a need to start the session?

Because you still need to append those links in the other frames with the sid to accomodate users that don't have cookies enabled.

If a user does'nt have cookies enabled, and they click a link in one of the static frames that changes the page in the main frame where the interaction of the session is, there is no way that the main frame would know what the session id is unless the link in the static frame passed the sid in the url.
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Old August 3rd, 2003, 09:15 PM
harvey_r01 harvey_r01 is offline
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Cheers Joe,

...but the links on the left pain do not call any other PHP pages or protected pages. The whole site is static bar 1 link which opens a search utility in the mainFrame and the session does not need to be called anywhere else. Please have a look: http://sips.bmth.ac.uk ...and click onto search for placement, and try loging in as uname:test pwd:test

So, in theory if there is only one link to a login page and the other frames do not have any other links to protected PHP pages, it should work?

Thanks,

Harvey

loginpage - when login request sent it does...
PHP Code:
if (isset($_SESSION['username']))  {
  echo "<META HTTP-EQUIV=\"Refresh\" CONTENT =\"0;URL=http://www.dynamicwebprojects.co.uk/student/search.placement.php\">";
}

if($Login) {
    $sql = "SELECT * FROM smstudents WHERE studuname='" . $uname . "'";
    $result = mysql_query($sql);
    if (!$result)  {
      header("Location: [url]http://www.dynamicwebprojects.co.uk/student/studlogin.php?msg=db404[/url]");
    }
    elseif (@mysql_num_rows($result) == ( int )0)  {
      header("Location: [url]http://www.dynamicwebprojects.co.uk/student/studlogin.php?msg=uname404[/url]");
    }
    elseif (@mysql_num_rows($result) > ( int )0)  {
      $sql2 = "SELECT * FROM smstudents WHERE studuname='" . $uname . "' AND password='" . md5($pwd) . "'";
      $result2 = mysql_query($sql2);
      if (!$result2)  {
        header("Location: [url]http://www.dynamicwebprojects.co.uk/student/studlogin.php?msg=db404[/url]");
      }
      elseif (@mysql_num_rows($result2) == ( int )0)  {
        header("Location: [url]http://www.dynamicwebprojects.co.uk/student/studlogin.php?msg=staffpwd404[/url]");
      }
      else  {
        session_start();
        $_SESSION['username'] = $uname;
        echo "<META HTTP-EQUIV=\"Refresh\" CONTENT =\"0;URL=http://www.dynamicwebprojects.co.uk/student/search.placement.php\">";
      }
    }
}

?> 


--Session file included in all other pages does...
PHP Code:
<?php //sess.php
session_start();
if (!isset($_SESSION['username']))  {
  header("Location: [url]http://www.dynamicwebprojects.co.uk/student/studlogin.php?msg=sess404&username=[/url]" . urlencode($_SESSION['username']));
}
else  {
session_start();
}    

?>
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  #6  
Old August 5th, 2003, 08:59 PM
FrankieShakes FrankieShakes is offline
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Harvey,

I'm not an expert on sessions... In fact, I'm learning as I go... In speaking with Joe last week, the reason you still need to append your session id to non-protected pages is so that when your users "resume" their sessions (re-accesses the protected areas), their session will continue from where it left off.

Hope that helps clear the confusion...
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