CodeIgniter 2.0

[eluser]WanWizard[/eluser]
You can get CI 2.0 from BitBucket, the 'get source' link.

I did a migration test simply by deleting the contents of the system directory, copying the CI system directory in (my 'application' is outside the system directory).

The amount of conversion work greatly depends on the amount of modifications and CI extensions you have.

If you have none, the only change is that your models now extend CI_Model instead of Model (same perhaps in the future for Controller). If you have extended libraries, you might have to move some, as in 2.0 there's a split between core libraries and other libraries (2 directories). If you have modified CI core code, you have to dive into the code and check if your changes are still relevant, and if so, if they still work as intended.