Hi,
I am using php4.0.3 pl1 on windows  NT 4.
Initially  i set session.auto_start=0 in the  configuration file(php.ini)
 there is another setting in the configuration file i.e session.save_path
is this the path where php will store session related information?
and if yes than after using session_destroy or session_unset will
the session related details will be deleted.
this does not happen on my system .Any specific  settings required.
I am giving a sample script which runs fine on linux server
running apache web server and using php4.0.3 pl1
with session.auto_start =1 in php.ini
sample script:
------------
<php
session_register(SESSION) /* register a session variable*/
if(!isset($SESSION[sessionid])) /* will be unset for the first time*/
 {
    $SESSION["login_id"]=$login; /* set the values of session variables*/
    $SESSION["pass"]=$password;
 }?>
/* accessing these session variables in other php scripts*/
test.php
-------
<?php
session_register(SESSION) /* is this explicitly required or the session 
variables will be passed by default */
if(!isset($SESSION[sessionid])) /* will be set if login and password is 
correct
  {
    take necessary action
  }
 else
  proceed 
script executed when signout is clicked
-------------------------------
<?php
session_register(SESSION)
if(isset($SESSION[sessionid]))
 {
   session_unregister("SESSION");
 }
?>
bug :
-----
when I tried to run the same script on the windows NT 4 server
with apache server  running php 4.0.2 
with session.auto_start =1 and session.save_path=/tmp
i get the following errors:

1. warning: open(/tmp\sess_41f84ff363faba0f398479ac1c7d8e08, O_RDWR) failed: m (2) 
in Unknown on line 0

2. Warning: Failed to write session data (files). Please verify that the current se
tting of session.save_path is correct (/tmp) in Unknown on line 0

Pls  let me know whether the /tmp folder should be created in the same
directory where php in installed or it can be in some other directory.
is the problem because session.auto_start=1
Pls note that with the same settings but windows NT 4 and 
php 4.0.3 pl1 the scripts are working fine.
Also Pls tell me if  I have to explicitly specify session_start()
in my code (every script) if session.auto_start=0 and if it is 1 will it give
me an error with the above funciton in my code.