Lets stick with num_rows() and have no more mention of affected_rows() since we're not affecting anything.
What it does do however is scare off those who are less experienced because they know that they're not able to support your request for help. Those are the sort of people who will purely guess at something without really understanding debugging. Generally around here once you've got a reasonably respected helper assisting you, others will leave you to it unless you miss something and its glaring them in the face. It's kind of a silent understanding between those who donate time here. There are many here who would help you - Fou-Lu, firepages, Sppokster, Inigoesdr, Lamped and ShaneC to name a few (those were taken from the mod list - but there are others who are not mods). If you've ever heard the proverb "Too many cooks spoil the broth" then you'll understand it.
Don't be put off codingforums, I'm also on sitepoint but I find it a site that is 'PR heavy'. In other words its highly advertised as the expert site but the quality of support can be a bit low sometimes. I've found that codingforums is actually a lot better.