Error handling

Can anyone recommend a good book on PostgreSQL/PHP error handling? I'm
looking for a kind of "start here" book, a primer, that offers a
simple-to-complex approach. There are lots of books on the subject of PHP
and PostgreSQL but I'd like something, if it exists or is even part of a
larger book, that covers error handling from a beginner's perspective.

I've been reading the PHP online manuals on the subject but I find them
somewhat devoid (might be a bad choice of words here) of a top-down
structure to this subject. I've tried programming a few of the examples but
I'm not getting any returns like I've expected, so I assume I'm missing
something basic. The online manuals are just a reference after all, and not
a structured approach.

Any guidance is appreciated, and thanks.

Dale