session_unset - PHP code example

PHP Function Session_Unset

php function session_unset is a useful function used to unset all the variables in a session. It will clear the information that was passed to it when a user has finished with his work on your website.

In a website, there is a need to store the user's data in order to show them personalized content. This can be done using cookies or sessions. Cookies are used on the user's computer, while sessions are stored in the database. Cookies can be hacked easily, which makes them an unsafe way to store the user's data. On the other hand, a PHP session is stored on the server, making it a secure option.

When a session is started it is identified by a global variable $_SESSION which stores all the data that has been passed to it. The session ends when the user closes the browser or logouts from the website. This is a good feature because it ensures that the user's data isn't being accessed by any other users until the user comes back to the site.

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session_unset example

// low priority to come after regular response listeners             KernelEvents::RESPONSE => ['onKernelResponse', -1000],
        ];
    }

    public function reset(): void
    {
        if (\PHP_SESSION_ACTIVE === session_status()) {
            session_abort();
        }

        session_unset();
        $_SESSION = [];

        if (!headers_sent()) { // session id can only be reset when no headers were so we check for headers_sent first             session_id('');
        }
    }

    /** * Gets the session object. */
    abstract protected function getSession(): ?SessionInterface;