Problem with sessions

Alex_B

Hi,

I was working on my site and I was using sessions. Everything worked fine until this morning when I start seeing following

Warning: session_start(): open(/tmp\sess_b2056c8e875efbb180e40858609925d4, O_RDWR) failed: No such file or directory (2) in d:\vhosts\eager\public_html\wire\includes\application_top.php on line 3
Warning: session_start(): Cannot send session cookie - headers already sent by (output started at d:\vhosts\eager\public_html\wire\includes\application_top.php:3) in d:\vhosts\eager\public_html\wire\includes\application_top.php on line 3

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at d:\vhosts\eager\public_html\wire\includes\application_top.php:3) in d:\vhosts\eager\public_html\wire\includes\application_top.php on line 3

Warning: Cannot modify header information - headers already sent by (output started at d:\vhosts\eager\public_html\wire\includes\application_top.php:3) in d:\vhosts\eager\public_html\wire\includes\application_top.php on line 4

My hosting provider runs windows 2000 and I think the problem is that /tmp directory is not accessible or does not have full permissions, but I am not sure.

My application_top,php starts like this

<?php
if (isset($SessID)){ session_id($SessID); }
session_start();
header("Cache-control: private"); // IE 6 Fix.
setcookie("SessID", session_id(), time() + 1440);

require('includes/configure.php');
require('includes/functions/general.php');
include('includes/error_msg.php');
include('includes/dbtables.php');
......
.....

Any suggestions?
Thanks

devinemke

Originally posted by Alex B
My hosting provider runs windows 2000 and I think the problem is that /tmp directory is not accessible or does not have full permissions, but I am not sure.

that looks like precisely what is happening

Originally posted by Alex B
Any suggestions?

1. do a simple test: write a simple script that performs any sort of file write operation to /tmp to confrim the error
2. call your host

Roger_Ramjet

Well!! Fundamental error, trying to send cache control headers after you have started sending output. If you want no cache then use this, and READ THE COMMENTS

<?php		//header.php
//disable all browser caching MUST BE FIRST LINES WITH NO PRECEEDING SPACES ETC
// Date in the past
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

// always modified
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

// HTTP/1.1
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);

// HTTP/1.0
header("Pragma: no-cache");

?>

It is what it says, you must have NOTHING in the html output stream, not even a single whitespace before sending the headers. If you don't wnt them all just use the ones you do, or yours. But NOTHING in the html stream before your headers, as the error messages say.

rehfeld

you can also define your own directory for php to save sessions to.


ini_set('session.save_path', '/full/path/to/some/writable/dir');

make sure its a folder thats not accessible to visitors. but this is really something your host should fix.

Alex_B

I have tried to do simple test so I have moved one of my text files into "tmp" directory. I am able to read from the file, but not write to it. I guess it is a problem with the permission

devinemke

in reference to Roger's post: the "headers already sent" errors are being produced because of the errors generated by the session_start() call, which in turn are being generated by the inability to write session files to the /tmp directory.