我在redis缓存中有这样一个数组

127.0.0.1:6379> MGET laravel:campaign1107
1) "a:1:{s:21:\"unsubscriberCount1107\";i:2;}"
127.0.0.1:6379>

现在我需要 unsubscriber1107 价值观。我试着这样做

dd(cache()->get($arrayCacheKey[$cacheKey]));

但是，这是行不通的。如何访问此对象？
设置缓存的代码

public function updateUnsubscriberCountCache($campaign_id, $type) 
{  
    $assoc = [];
    $arrayCacheKey = 'campaign'.$campaign_id.'';
    $cacheKey = 'unsubscriberCount'.$campaign_id.'';
    if($type == 'unsubscriberLogCount') {
        $cacheKey = 'unsubscriberCount'.$campaign_id.'';
         if( cache()->get($cacheKey) > 0) {
              cache()->increment($cacheKey);
              //cache()->forget($cacheKey); 
            } else {
                $total = UnsubscribeLog::select('unsubscribe_logs.*')->leftJoin('tracking_logs', 'tracking_logs.message_id', '=', 'unsubscribe_logs.message_id')->where('tracking_logs.campaign_id', '=', $campaign_id)->distinct('subscriber_id')->count('subscriber_id');
                 //cache()->forever($cacheKey, $total);
                $assoc[$cacheKey] = $total;
                cache()->forever($arrayCacheKey, $assoc);
            }
        }
    }