Web Design company – Goweb99 blogGet your website designed for as low as $99.

PHP isset() Function

When we create a variable and store it in a session, it is with the intention to use it in the future. But to use a session variable it should first be created and set. So you must first check for its existence.

Here we use PHP’s isset function. isset is a function that takes any variable you want to use and checks to see whether it has been assigned some value or not.

Destroying a Session

If you wish to delete some session data, you can use the following two functions:

• unset() function
• session_destroy() function

The unset() function is used to free the specified session variable:

<?php
unset($_SESSION['views']);
?>

You can also completely destroy the session by calling the session_destroy() function:

<?php
session_destroy();
?>

session_destroy() will reset your session and you will lose all your stored session data.

---

[Translate]