configure multiple databases in zf2

If you look at the Zend\Db\Adapter\AdapterServiceFactory, you'll see that your adapter configuration points to only one key 'db'. Which means that the Adapter that it builds will always use this (unique) configuration key. I recommend you to create your own factory that would look like this : namespace Your\Namespace; use Zend\ServiceManager\FactoryInterface; use Zend\ServiceManager\ServiceLocator

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Zend Framework 2