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offset');
// get the user's time zone
$user =& JFactory::getUser();
$tz = $user->getParam('timezone', $tzdefault);
Notice that we supply a default value, $tzdefault, which is extracted from the site
settings. We use this as the second parameter for getParam(); this parameter
is optional.
This example demonstrates how we can modify the value of the user's time zone:
$user =& JFactory::getUser();
$user->setParam('timezone', '0');
Chapter 7
[ 179 ]
When we perform any modifications to the user's session, unless we save the
changes, the modifications will last only until the session expires. User parameters
are not used as a temporary store. To store temporary data we should use the session
and the user state; we will see both in the next section.
If we store temporary data in user parameters, we run the risk
of saving the data accidently to the user's database record.
A common design issue is the extension of the user beyond their predefined
attributes. There are three common ways of dealing with this:
Add additional fields to the #__users table.


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