What is PHP $_session variable?

The global PHP $_SESSION variable stores values of all session variables. To finish the session, you should simply close the window or tab in which a website was loaded. It is possible to load permanent user data for particular users using databases.

How do I initialize a session with a PHP Session ID?

When the server comes across the PHPSESSID cookie, it will try to initialize a session with that session id. It does so by loading the session file which was created earlier, during session initialization. It will then initialize the super-global array variable $_SESSION with the data stored in the session file.

How long do session variables last?

By default, session variables last until the user closes the browser. So; Session variables hold information about one single user, and are available to all pages in one application. Tip: If you need a permanent storage, you may want to store the data in a database. A session is started with the session_start () function.

How do I access a session variable's value?

You can access a session variable’s value by using the global variable $_SESSION. In the example stated below, you will create another session with a variable that stores your name. Now that the variable is set, you will access it from another file. Create another file and write the following code to access the name variable you have just set.