I often find myself looking at PHP questions on stackoverflow.com where the answer is simply for the OP to do some basic debugging.
eg.
- Put in trace statements
- Seperate out Variable from expressions.
- remove @ to see what the real error is.
To me these are basic debugging techniques I learnt in college and in 10 years of development. I know there are some good programming books that deal with these basics, but are there any good online resources that I could point people to?