Session Functions
PHP Manual

session_destroy

Destroys all data registered to a session

Description

bool session_destroy ( void )

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.

In order to kill the session altogether, like to log the user out, the session id must also be unset. If a cookie is used to propagate the session id (default behavior), then the session cookie must be deleted. setcookie may be used for that.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 Destroying a session with $_SESSION

<?php
// Initialize the session.
// If you are using session_name("something"), don't forget it now!
session_start();

// Unset all of the session variables.
$_SESSION = array();

// If it's desired to kill the session, also delete the session cookie.
// Note: This will destroy the session, and not just the session data!
if (ini_get("session.use_cookies")) {
    $params = session_get_cookie_params();
    setcookie(session_name(), '', time() - 42000,
        $params["path"], $params["domain"],
        $params["secure"], $params["httponly"]
    );
}

// Finally, destroy the session.
session_destroy();
?>

Notes

Note:

Only use session_unset for older deprecated code that does not use $_SESSION.

See Also

  • unset
  • setcookie