Introduction to the session instance of Yii operation _php Instance

This article briefly describes the method of using session in the YII framework, as follows:

One, and the standard PHP code difference:

In the YII framework, you don't need to use session_start () like standard PHP code.
In the YII framework, the AutoStart property is set to True by default, so
Although Session_Start () is not used, you can still use $_session global variables, but it is best to use the yii::app->session of the YII framework package

Second, the use of Session variables:

Set session:

Yii::app ()->session[' var ']= ' value ';

Use session:

Echo Yii::app ()->session[' var '];

Remove session:

Unset (Yii::app ()->session[' var ');

How to configure your session when using a more complex point
The configuration items can be located in the protected/config/main.php components :

' Session ' =>array (
  ' AutoStart ' =>false (/true),
  ' sessionname ' => ' Site Access ',
  ' cookiemode ' = > ' only ',
  ' savepath ' = '/path/to/new/directory ',
),

To keep the session in the database settings:

' Session ' => Array (
  ' class ' => ' system.web.CDbHttpSession ', '
  connectionid ' => ' db ',
  ' Sessiontablename ' => ' actual_table_name ',
),

In addition, for debugging purposes, it is sometimes necessary to know the session ID of the current user,
This value is in:

Yii::app ()->session->sessionid

Finally, when the user exits login (logout), you need to remove traces that can be used:

Remove all session variables, and then call the

Remove the session data stored on the server side.