Session variables are used to store information for a particular period of time. They are used to carry information from one page to another in a website application. The data stored in the session variable can be accessed by PHP any number of times until the session expires.
In DotKernel, Zend_Session_Namespace() is used to create a session:
$session = new Zend_Session_Namespace($namespaceName);
As Zend Framework suggests, to avoid problems use Zend_Session_Namespace instance instead of $_SESSION.
For each module the session has a different namespace and different period of time. The session settings are declared in resource.xml:
<session> <frontend> <name>frontend</name> <rememberMeSeconds>864000</rememberMeSeconds> </frontend> <admin> <name>admin</name> <rememberMeSeconds>864000</rememberMeSeconds> </admin> </session>
It’s not a specific requirement to start a session in each module. For example the RSS module doesn’t need sessions – it is initialized with NULL.
Session is started in the bootstrap of the application – index.php – and stored using Zend_Registry:
Dot_Sessions::start($requestModule); $session = Zend_Registry::get('session');
Wherever you need session, use the get method from Zend_Registry:
$session = Zend_Registry::get('session');
Excepting the usage for login, session is also used to store messages. displayMessage() is a View method used to display messages stored in session. This method uses 2 variables: type and text. The message type can be error, info and warning. The text variable is the message that will be displayed.
Whenever you need to display a message use this code to store it in the session:
$session->message['txt'] = $option->errorMessage->login; $session->message['type'] = 'error';
As you may have noticed, the message text is taken from the dots/*.xml file.
Note: There is no need to call the displayMessage method, as it is already called from the IndexController.php