I've had several emails from developers about the last blog entry and they all wanted more details on how to implement the Observer pattern for error handling. So, I have started writing an article that will be published by DevShed sometime in the near future.
You can read through the article and stay up to date with the creation. Right now the content is enough for any competent coder to abstract the concept and implement the solution into their application. I'll be adding content to the article as time allows and will hopefully have it finished soon.
While I'm adding content you can always read through it here: PHP4/MySQL Error Handling with an Observer design pattern
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