common error handling problem - a PFC issue?

Hello to all PEAR-Devs, is there a chance to get numeric error codes in all your packages and all your error returns? The error handling of PEAR is a very nice one. But in my projects I need errors that can be processed by my php-scripts. In my Code I can not handle error messages like 'file not found' or 'db connection failed' ! How are you using such error messages? What do you do with them? I do not think that it is a good way to display such error messages! That is not very user friendly... At least not in professional projects! So it would really be great to have numeric error codes in each pear error. That helps extremely to make sure that an application runs in a well controlled way! Did I miss a discussion about that problem? I specially think this must be a need for the PFC !!! regards Matthias