Session/src/Session.php
public function invalidate()
    {
        $params = session_get_cookie_params();
        setcookie(session_name(), '', time() - 42000,
            $params['path'], $params['domain'],
            $params['secure'], $params['httponly']
        );

        session_unset();
        session_destroy();

        $this->started = false;

        return $this;
    }
public function invalidate()
    {
        $params = session_get_cookie_params();
        setcookie(session_name(), '', time() - 42000,
            $params['path'], $params['domain'],
            $params['secure'], $params['httponly']
        );

        session_unset();
        session_destroy();

        $this->started = false;

        return $this;
    }
public function invalidate ( ) { $ params = session_get_cookie_params ( ) ; setcookie ( session_name ( ) , '' , time ( ) - 42000 , $ params [ 'path' ] , $ params [ 'domain' ] , $ params [ 'secure' ] , $ params [ 'httponly' ] ) ; session_unset ( ) ; session_destroy ( ) ; $ this -> started = false ; return $ this ; }
Invalidates the current session.

@return $this
Invalidates the current session .