src/CookieSessionHandler.php
public function read($sessionId) {
        $cookies = $this->getRequest()->cookies;

        $content = @unserialize($cookies->get($this->name, ''));

        if ($content === false || count($content) !== 2 ||
            !isset($content[0]) || !isset($content[1])) {
            $content = [time(), ''];
        }

        list($expire, $data) = $content;

        if($expire !== 0 && $expire < strtotime('now')) {
            return '';
        }

        return $data;
    }
public function read($sessionId) {
        $cookies = $this->getRequest()->cookies;

        $content = @unserialize($cookies->get($this->name, ''));

        if ($content === false || count($content) !== 2 ||
            !isset($content[0]) || !isset($content[1])) {
            $content = [time(), ''];
        }

        list($expire, $data) = $content;

        if($expire !== 0 && $expire < strtotime('now')) {
            return '';
        }

        return $data;
    }
{@inheritdoc}