gistfile1.txt

public function onBootstrap(MvcEvent $e)
{
    /* @var $sessionManager SessionManager */
    $serviceLocator = $e->getApplication()->getServiceManager();
    $sessionManager = $serviceLocator->get('Zend\Session\SessionManager');
    $sessionManager->setSaveHandler($serviceLocator->get('Zend\Session\SaveHandler\SaveHandlerInterface'));
}

---------

namespace Session;

return [
    'service_manager' => [
        'factories' => [
            'Zend\Session\SaveHandler\SaveHandlerInterface' => __NAMESPACE__ . '\Factory\SaveHandlerFactory'
        ]
    ]
];

-------------
    
namespace Session\Factory;

use Zend\Db\Adapter\Adapter;
use Zend\Db\TableGateway\TableGateway;
use Zend\ServiceManager\ServiceLocatorInterface;
use Zend\ServiceManager\FactoryInterface;
use Zend\Session\SaveHandler\DbTableGateway;
use Zend\Session\SaveHandler\DbTableGatewayOptions;
use Zend\Stdlib\ArrayUtils;

class SaveHandlerFactory implements FactoryInterface
{
    /**
     * Create service
     *
     * @param ServiceLocatorInterface $serviceLocator
     * @return mixed
     */
    public function createService(ServiceLocatorInterface $serviceLocator)
    {
        $config       = ArrayUtils::merge(['driver' => 'mysqli'], $serviceLocator->get('config')['dbParams']);
        $adapter      = new Adapter($config);
        $tableGateway = new TableGateway('session', $adapter);
        $saveHandler  = new DbTableGateway($tableGateway, new DbTableGatewayOptions());

        return $saveHandler;
    }
}