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how to destroy individual session variables

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Dec 03.2003

Hi,
I know how to destroy a complete session-session_destroy();

but how do you destroy individual session variables as I want to keep some of the variables in a session?
thanks

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PHP

8 Comments(s) ↴

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@YoNDec 03.2003 — what if you [URL=http://us3.php.net/manual/en/function.unset.php]unset()[/URL] it?

HTH
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@andymncDec 03.2003 — exact, you can simply use:

unset ($_SESSION["yoursessionvariable"]);
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@mg8Dec 04.2003 — I like to use unregister()
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@pyroDec 04.2003 — If you use that method, you'd best be aware that it "does not unset the corresponding global variable for name, it only prevents the variable from being saved as part of the session."

http://us3.php.net/manual/en/function.session-unregister.php
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@damon2003authorDec 16.2003 — Hi,

I am having trouble unregistering session variables.

I am attempting to unregister specific variables.

I get to a page, and us this:

I have tried this first, but it destroys all session variables

session_unset($_SESSION['textfieldFirstNameCustomerExisting']);

Next I tried this, but it doesnt seem to work at all

unset($_SESSION['textfieldFirstNameCustomerExisting']);

I am using $_SESSION

so , as I understand it session_unregister() does not work here

ani ideas here,

thanks
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@pyroDec 16.2003 — Are you remembering to run session_start() first? This should work fine:

[code=php]<?php
session_start();
unset($_SESSION['session_name']);
?>[/code]
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@damon2003authorDec 16.2003 — yes,

I have session_start() at the top of all my pages,

I then do some stuff with the session, and then right at the end call the unset().

If I replace this with session_unset() then this destroys all variables
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@damon2003authorDec 16.2003 — Hi,

I got it working,

this works

session_unregister('textfieldFirstNameCustomerExisting');

when global variabled is turned on
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