How can I destroy a specific session in PHP?

Destroying a PHP Session A PHP session can be destroyed by session_destroy() function. This function does not need any argument and a single call can destroy all the session variables. If you want to destroy a single session variable then you can use unset() function to unset a session variable.

How do I unset a session?

You can unset session variable using:

1. session_unset – Frees all session variables (It is equal to using: $_SESSION = array(); for older deprecated code)
2. unset($_SESSION[‘Products’]); – Unset only Products index in session variable.
3. session_destroy — Destroys all data registered to a session.

Which of the following is used to destroy the session?

function session_destroy()
If you want to completely destroy the session, you need to use the function session_destroy().

Which one of the following can be used to explicitly destroy the session object?

The correct answer is therefore c. The invalidate() method of HttpSession invalidates (or expunges) the session object.

How long is a session?

By default, a session lasts until there’s 30 minutes of inactivity, but you can adjust this limit so a session lasts from a few seconds to several hours. Learn more about adjusting session settings. When a user, say Bob, arrives on your site, Analytics starts counting from that moment.

What is unset session in PHP?

If $_SESSION is used, use unset() to unregister a session variable, i.e. unset ($_SESSION[‘varname’]); . Caution. Do NOT unset the whole $_SESSION with unset($_SESSION) as this will disable the registering of session variables through the $_SESSION superglobal.

What is the use of unset function in PHP?

The unset() function in PHP resets any variable. If unset() is called inside a user-defined function, it unsets the local variables. If a user wants to unset the global variable inside the function, then he/she has to use $GLOBALS array to do so. The unset() function has no return value.

Where are sessions stored PHP?

PHP Default Session Storage (File System): In PHP, by default session data is stored in files on the server. Each file is named after a cookie that is stored on the client computer. This session cookie (PHPSESSID) presumably survives on the client side until all windows of the browser are closed.

Which of the following is used to destroy the session Mcq?

Explanation: We can invalidate session by calling session. invalidate() to destroy the session.

What does destroy session do in PHP?

session_destroy (): bool session_destroy () destroys all of the data associated with the current session. It does not unset any of the global variables associated with the session, or unset the session cookie. To use the session variables again, session_start () has to be called.

What does session_destroy do in PHP?

session_destroy. (PHP 4, PHP 5, PHP 7) session_destroy — Destroys all data registered to a session. session_destroy ( void ) : bool. session_destroy() destroys all of the data associated with the current session. It does not unset any of the global variables associated with the session, or unset the session cookie.

How to get rid of $_session variables in PHP?

Actually, it works, but you also need to do $_SESSION = array (); after the session_destroy to get rid of $_SESSION variables. However, avoid doing unset ($_SESSION) because that makes sessions useless.

What is the difference between session_start and session_destroy?

session_destroy() destroys all of the data associated with the current session. It does not unset any of the global variables associated with the session, or unset the session cookie. To use the session variables again, session_start() has to be called.