Are there any PHP Frameworks (e.g. CodeIgniter) that support database connections on a per user account basis for use in a Multi-tenant database?

I'm looking into developing a multi-tenant SaaS application, and I found several sites that describe a solid way to separate the data using tenantIDs and updateable views. e.g. This blog post

It all hinges on the ability to have your user accounts authenticated from a master users table and then having their respective database connections use those user-specific credentials. This way, the views can pull the userid and map it t开发者_JS百科o the tenantID to display that user's view. However, most PHP frameworks tend to be very static when it comes to database connections (stored in text config files). They appear to be at odds.

Does anyone know: a) how to make CodeIgniter handle this gracefully? b) a different PHP framework that might?

At a horrendously basic level you can do this:

http://philsturgeon.co.uk/blog/2009/06/How-to-Multi-site-CodeIgniter-Set-up

Expand it as required, or move the logic into MY_Controller for more flexibility.

There is a topic talking about this on the Code Igniter forums.

http://codeigniter.com/forums/viewthread/165227/#846845

It looks like you set up your users DB as your main database in the config file, then you generate a config array for a new connection for a user based upon information in that users DB. So, I guess you'd need to at least store the DB name in the users database.

Not sure how well this works though, as I haven't had an occasion to try it out yet.

Sorry if that's not quite what you were looking for, but it should give you an idea of a Code Igniter approach.

Zend Framework. http://framework.zend.com/manual/en/learning.multiuser.intro.html