Loop into function public function start() in file elFinderSession.php:

this not looks nice:

if (ini_set('session.use_cookies', 0) === false) {
                    $this->fixCookieRegist === false; // <--- wrong code, what was meant by that?
                }

Also next one:
in public function __construct($opts)
is return, but return is constructor?
__construct cannot return a value