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Configuring for Sessions

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jdaniels

jdaniels

Technical User
Apr 23, 2002
63
GB
Hi,

I am running PHP4 (the latest stable release) on Windows ME with Apache 1.3.22 (Win). It works OK except for sessions. When I create a session, it gives the following errors in the browser:
===============================
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at c:\program files\apache group\apache\htdocs\session.php:7) in c:\program files\apache group\apache\htdocs\session.php on line 9

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at c:\program files\apache group\apache\htdocs\session.php:7) in c:\program files\apache group\apache\htdocs\session.php on line 9

Warning: Unknown(): Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0
===============================

The code that I use is this:
==============================
<html>
<head>
<title>Session Test</title>
</head>
<body>

<?php

session_start();

$thisVar = &quot;test&quot;;

session_register(&quot;thisVar&quot;);

?>

Variable: '<?php echo $_SESSION['thisVar']; ?>'

</body>
</html>
==============================

I am guessing I need to set a configuration flag, but where? httpd.conf? .htaccess?

Thanks,

Jonathan Daniels
 
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OK - I put the session creation code in front of the opening HTML tag - that got rid of the 2 errors relating to 'session_start'. Thankyou for that. However I cannot actually see the session variable; if I try to display it I get a blank. Also the last error is still there:

=======================================
Warning: Unknown(): Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0
=======================================

Any ideas where I set 'register_globals' ?

Thanks
 
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Solved! For some reason my browser ditched the first 2 errors, then waited a while to ditch the last and show the variable. Cheers for your help.
 
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jdaniels:

One thing to be aware of....

The PHP online manual states: If you are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(), session_is_registered() and session_unregister()

I recommend using $_SESSION, because it does not make your code dependent on the setting of register_globals, and it makes your code more maintainable.

After issuing session_start(), just use the line &quot;$_SESSION['thekey'] = thevalue&quot;. The session variable will be automatically registered. You can then reference the value in any other script after issuing session_start(). Use something like array_splice() to remove the key and value from the array, effectively unregistering it. Want the best answers? Ask the best questions: TANSTAAFL!
 
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OK I was just going to ask about that. Thanks!
 
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