Related to https://github.com/doctrine/mongodb/issues/239: in order to currently use [MongoDBCache](https://github.com/doctrine/cache/blob/master/lib/Doctrine/Common/Cache/MongoDBCache.php) `ext-mongo` is required. This extension has been replaced by [ext-mongodb](https://pecl.php.net/package/mongodb) on PHP 7. Effectively this means that MongoDBCache can currently not be used on PHP 7.
Related to doctrine/mongodb#239: in order to currently use MongoDBCache
ext-mongois required. This extension has been replaced by ext-mongodb on PHP 7.Effectively this means that MongoDBCache can currently not be used on PHP 7.