Bolt\Provider\SessionServiceProvider::registerMemcacheHandler PHP Method

    protected function registerMemcacheHandler(Application $app)
    {
        $app['session.handler_factory.backing_memcache'] = $app->protect(function ($connections) {
            $memcache = new \Memcache();
            foreach ($connections as $conn) {
                $args = [$conn['host'] ?: 'localhost', $conn['port'] ?: 11211, $conn['persistent'] ?: false];
                if ($conn['weight'] > 0) {
                    $args[] = $conn['weight'];
                    if ($conn['timeout'] > 1) {
                        $args[] = $conn['timeout'];
                    }
                }
                call_user_func_array([$memcache, 'addServer'], $args);
                if ($conn['weight'] <= 0 && $conn['timeout'] > 1) {
                    $memcache->setServerParams($args[0], $args[1], $conn['timeout']);
                }
            }
            return $memcache;
        });
        $app['session.handler_factory.backing_memcached'] = $app->protect(function ($connections) {
            $memcache = new \Memcached();
            foreach ($connections as $conn) {
                $memcache->addServer($conn['host'] ?: 'localhost', $conn['port'] ?: 11211, $conn['weight'] ?: 0);
            }
            return $memcache;
        });
        $app['session.handler_factory.memcache'] = $app->protect(function ($options, $key = 'memcache') use($app) {
            $connections = $this->parseConnections($options, 'localhost', 11211);
            $memcache = $app['session.handler_factory.backing_' . $key]($connections);
            $handlerOptions = [];
            if (isset($options['expiretime'])) {
                $handlerOptions['expiretime'] = $options['expiretime'];
            }
            if (isset($options['prefix'])) {
                $handlerOptions['prefix'] = $options['prefix'];
            }
            if ($key === 'memcache') {
                return new MemcacheHandler($memcache, $handlerOptions);
            } else {
                return new MemcachedHandler($memcache, $handlerOptions);
            }
        });
        $app['session.handler_factory.memcached'] = $app->protect(function ($options) use($app) {
            return $app['session.handler_factory.memcache']($options, 'memcached');
        });
    }