Session Management wanted some help

knight · March 3rd, 2004, 05:49 AM

any one would like to tech me session mangaement in php or any on
who told me the resources or artical or any session mangement stuff
i have book named begining php 4 but it has not much discussion about
that my request specialy for Nikolai

Snib · March 3rd, 2004, 04:46 PM

Everything there is to know

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---Snib---
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nikolai · March 3rd, 2004, 08:36 PM

To put it simply, sessions give you a way to persist the value of variables between page requests.

To use sessions, simply start your scripts with session_start(). Any values you want to store in sessions is simply inserted into the $_SESSIONS array.

Simple example:

<?php
session_start();

if (!isset($_SESSION['count']))
{
$_SESSION['count'] = 0;
}

++$_SESSION['count'];

echo "You've seen this page {$_SESSION['count']} times.\n";

?>

Take care,

Nik
http://www.bigaction.org/

knight · March 4th, 2004, 12:39 AM

dear nikolai
when i use ur code my browser say the warnings as under
and page conunt doesnt incremented

---------------------------------------
Warning: session_start(): Cannot send session cookie - headers already sent by (output started at d:\inetpub\wwwroot\mysql\sessiontesting.php:8) in d:\inetpub\wwwroot\mysql\sessiontesting.php on line 9

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at d:\inetpub\wwwroot\mysql\sessiontesting.php:8) in d:\inetpub\wwwroot\mysql\sessiontesting.php on line 9
You've seen this page 1 times.
----------------------------------

what is the problem pls tell me
thanks

Snib · March 4th, 2004, 01:15 PM

This is probably because you have output before session_start()

This doesn't work:

<html>
<?php
session_start();
?>
</html>

This also doesn't work:

<?php
echo "<html></html>";
session_start();
?>

session_start() comes before any other output, as it has to do with headers.

HTH,

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---Snib---
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nikolai · March 4th, 2004, 05:10 PM

Also, make sure there's no extra whitespace before your <?php tags. The most subtle reason for this error is that there's a newline or space before the first <?php tag.

Take care,

Nik
http://www.bigaction.org/

nikolai · March 4th, 2004, 05:37 PM

I should add the reason for the error: Sessions are managed by PHP using cookies by default. The session data is all stored on the web server machine, in session files by default. However, the session ID is stored in a cookie on the client machine. The session ID uniquely identifies the session data file on the server.

As such, all cookie fetch and store requests are sent as part of the HTTP header information before any output is sent.

Take care,

Nik
http://www.bigaction.org/

knight · March 5th, 2004, 01:13 AM

The problems have solved thanks all specially nikoloi and snib
pls can u give me ur msn id if u like

nikolai · March 12th, 2004, 04:07 PM

I'm glad you got it working. I don't use IM apps, and prefer all questions to be posted to the forums rather than to IM or personal email anyway...

Take care,

Nik
http://www.bigaction.org/