[RESOLVED] unset session values and then i got waring

searain

I used the session to hold the shopping cart values. Such as the product codes and the quantity (these values are saved in array.)

such as

$SESSION['shopping_cart_products_codes'];
$SESSION['shopping_cart_products_quantity'];

I have no problem with add more items to the cart, remove some of the item from cart, edit the value of the cart.

But when I run the cancel order page which I use

if (isset($SESSION['shopping_cart_products_codes']))
unset($SESSION['shopping_cart_products_codes']);

if (isset($SESSION['shopping_cart_products_quantity']))
unset($SESSION['shopping_cart_products_quantity']);

to clean off the cart session values.

And now I go back to the view cart page which I will use

if (isset($SESSION['shopping_cart_products_codes']))
{
...
}
if (isset($SESSION['shopping_cart_products_quantity']))
{
...
}

due to the session values are unset, the view cart will not have the activites here.

But I got this warning message:

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

HELP!

Thanks!

devinemke

the error message itself tells you exactly what you need to do to surpress the error...but anyway this is from the manual:

http://www.php.net/manual/en/ref.session.php

session.bug_compat_42
PHP versions 4.2.3 and lower have an undocumented feature/bug that allows you to initialize a session variable in the global scope, albeit register_globals is disabled. PHP 4.3.0 and later will warn you, if this feature is used, and if session.bug_compat_warn is also enabled. This feature/bug can be disabled by disabling this directive.

session.bug_compat_warn
PHP versions 4.2.3 and lower have an undocumented feature/bug that allows you to initialize a session variable in the global scope, albeit register_globals is disabled. PHP 4.3.0 and later will warn you, if this feature is used by enabling both session.bug_compat_42 and session.bug_compat_warn.

searain

But how can I code my codes better that the error will not show in the first place?

Thanks!

devinemke

searain wrote:
But how can I code my codes better that the error will not show in the first place?

you don't. as the manual suggests, this is a feature/bug. simply turn it off.

searain

Thanks!

I found the error. It was due to my javascript error and accidently i run two php pages at one call (1 page is not supposed to run, but my javascript error called on it to run too.). And it caused the confusion in the execution of the php page which i was intended to run.

Plus, I found the same error again in another case. This time, the error cause is kind clear.

I tried to assign session values to a variable. But due to the situaitons, the variable is not set (such as if the cart is empty, the variable is unset in that case).

So when i try to assgin session values with a variable (this variable usually is set and with values), but in rare case, that this variable is not set at all. Then I run to the warning again. I think the warning is from this

--
session.bug_compat_42
PHP versions 4.2.3 and lower have an undocumented feature/bug that allows you to initialize a session variable in the global scope, albeit register_globals is disabled. PHP 4.3.0 and later will warn you, if this feature is used, and if session.bug_compat_warn is also enabled. This feature/bug can be disabled by disabling this directive.

Anyway, I add codes to detect the variable is set or not first before i will assign it to the session. That solved the warning issue.

Thanks!