i test the following script


<?php
$config_use_sessions = TRUE;
session_start();
if($_SESSION['logged_in'] !== true)
{
Header('Location: login_page.php');
}// valid user's only page here:
?>


but browser say the erros below
Warning: session_start(): open(D:\WINNT\PHP\sessiondata\sess_9ba6395c09f620f 8202e20f22f22ccab, O_RDWR) failed: Permission denied (13) in d:\inetpub\wwwroot\cutenews\ab.php on line 10

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at d:\inetpub\wwwroot\cutenews\ab.php:8) in d:\inetpub\wwwroot\cutenews\ab.php on line 10

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at d:\inetpub\wwwroot\cutenews\ab.php:8) in d:\inetpub\wwwroot\cutenews\ab.php on line 10

Notice: Undefined index: logged_in in d:\inetpub\wwwroot\cutenews\ab.php on line 11

Warning: Cannot modify header information - headers already sent by (output started at d:\inetpub\wwwroot\cutenews\ab.php:8) in d:\inetpub\wwwroot\cutenews\ab.php on line 13

Warning: Unknown(): open(D:\WINNT\PHP\sessiondata\sess_9ba6395c09f620f 8202e20f22f22ccab, O_RDWR) failed: Permission denied (13) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (D:\WINNT\PHP\sessiondata) in Unknown on line 0


what is the problem pls tell me

try the following and see if ti helps.
PHP is case sensitive and header was written as Header, as was Location. Also !== true, as far as I am aware (And I may be wrong) is invalid syntax in PHP. it is true that "==" tests for equivalence, but I don't think that you can use it with the not operand "!".

HTH

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David Thorne, Student
UK

None of that is true.

Function names are not case-sensitive in PHP (Variables and Constants are).

The '!==' operator is valid, it means not identical whereas '===' means identical. This operator exists because '==' is a less strict comparison, e.g. not case sensitive, FALSE == 0 is TRUE.

See http://www.php.net/manual/en/languag...comparison.php

AND

http://www.php.net/manual/en/types.comparisons.php

The latter shows contrasts and comparisons between the '==' operator and the '===' operator.

'Location' in the call to headers is most generally capitalized, but, this is not a rule.

Onto Knight's problem...

Warning: session_start(): open(D:\WINNT\PHP\sessiondata\sess_9ba6395c09f620f 8202e20f22f22ccab, O_RDWR) failed: Permission denied (13) in d:\inetpub\wwwroot\cutenews\ab.php on line 10

    Well the error says permission denied. Therefore, you have a file permissions error. PHP does not have enough permissions to access the file. Is PHP installed in the WINNT directory? Have a look at this post: http://p2p.wrox.com/topic.asp?TOPIC_ID=8169. If that post doesn't do anything to answer your questions then come back to us.

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at d:\inetpub\wwwroot\cutenews\ab.php:8) in d:\inetpub\wwwroot\cutenews\ab.php on line 10
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at d:\inetpub\wwwroot\cutenews\ab.php:8) in d:\inetpub\wwwroot\cutenews\ab.php on line 10

    These are domino effect errors, output directly because of the first error.

Notice: Undefined index: logged_in in d:\inetpub\wwwroot\cutenews\ab.php on line 11

    This one says $_SESSION['logged_in'] is not a defined variable. Perhaps you should use if (isset($_SESSION['logged_in']) && $_SESSION['logged_in'] == true) isset() checks that it exists first.

Warning: Cannot modify header information - headers already sent by (output started at d:\inetpub\wwwroot\cutenews\ab.php:8) in d:\inetpub\wwwroot\cutenews\ab.php on line 13

    Correct the last error about the variable not existing and this one will go away.

Warning: Unknown(): open(D:\WINNT\PHP\sessiondata\sess_9ba6395c09f620f 8202e20f22f22ccab, O_RDWR) failed: Permission denied (13) in Unknown on line 0
Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (D:\WINNT\PHP\sessiondata) in Unknown on line 0

    Again, another permissions error, do what the error says, check the session.save_path directive in php.ini and that PHP has permission to access the files in that directory.

hth,
Rich

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Smiling Souls
http://www.smilingsouls.net
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What can I say other than sorry! I did say I might be wrong (Happens surprisingly frequently) "knight" I am sorry. However I do use isset() often, and as Rich says, it is used to check for existence of a variable and might come in useful. Hope I didn't cause too much inconvenience. I'll check what I am talking about form now on!

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David Thorne, Student
UK