Auto Resize - Crop Avatar ?!

3. Simply add to whereever the <img> tag for the avtar is displayed height=100 width=100

This will make bigger (or smaller) any image that isn't already 100x100.

So I think viewtopic.php and profile.php is where you need to check

lol
Which is why you set the max size in the forums to 100 x 100

Nah, it's clear, I just have no clue how it would be done

This is a pet peeve of mine with most php systems. Picture upload should be idiot proof!

I know it's not an issue if you have another geeky board (for gamers, coders or whatever), but the average user is not going to resize their pictures for you. They don't know how or can't be bothered.

Anyway, thame^ contributed some excellent code here!

I have some minor problems with it, so if anyone could help me squash those bugs the issue would be solved.

(The bugs may be specific to my site, because I have profile.php at the root as part of my main site, while PunBB is in a '/forum' folder. But everything else works fine...)

Yes, but most serious hosts have that installed these days. My underlying point is that a lot of PHP scripts don't have the general end user in mind. I'm not talking about the people installing the scripts and building the sites, but the people using the websites. They could be your grandmother! They should be idiot-proof (not saying your grandmother's an idiot, but still...)!

Idiot-proof picture upload to me is a basic requirement. The code at that link in my previous post works really well, so the problem is solved in PunBB.

Behavior that isn't necessarily supported by all installs, that not everyone wants in the first place, and which would involve quite a bit more code (ie: in your code, what would happen if I uploaded a gif/png that needed transparency?) is better suited for an extension IMO
Plus, I think the auto-resizing issue can cause just as many issues for users. Especially if you have the kind of users that try to upload 100KB, 500x500 pictures of their pet. You'll simply be fielding "why did my picture shrink and look bad" questions instead of "what does this error mean" questions.