Joomla! Documentation™

Saving a request variable into user state

Because setting a user state variable from a variable in the request is such a common operation, there is an API method to make the task easier. This is generally safe to use because it calls JInput->get to obtain the input from the request, but remember that none of the input filtering calls will protect against SQL injection attempts.

$app = JFactory::getApplication();
$app->getUserStateFromRequest( <key>, <name>, <default>, <type> );

where

<key>	the name of the variable in the user state.
<name>	the name of the request variable (same as the first argument of a JInput->get call).
<default>	the default value to be assigned to the user state variable if the request variable is absent. The default is null.
<type>	預期的變數型別