Exception or error:
I’ve been using CodeIgniter for some quite time, and I’ve been extremely happy with its Active Record stuff. It’s great to query the database with it.
Recently I’ve started a new project and I can’t use such a framework anymore.
Is there a simple PHP Active Record library that does its job and gets out of the way (similar to CodeIgniter’s version)?
How to solve:
Are you explicitly looking for an implementation of the Active Record pattern?
If not you might want to look into an object-relational mapper (ORM), such as Doctrine or Propel. See also this question on SO.
You may want to have a look at ADOdb.
You can also try this easy to use active record class which also uses an MySQL abstract layer.