Invalid sessions are a common occurrence in web development, and can lead to a variety of problems for users. For example, an invalid session can cause users to be logged out of their accounts, or to lose access to important data. As a result, it is important to be able to check if a session is invalidated.
There are several different ways to check if a session is invalidated. One common method is to use the PHP function session_status(). This function returns the current status of the session. If the session is invalidated, the function will return the value PHP_SESSION_NONE.
