Board Thread:Support Requests - Getting Technical/@comment-5558012-20141026165705

I have a few questions about a MediaWiki:Titleblacklist. These expressions always confuse me.

First is in regard to . Is this specifically for .jpeg images or does it also include .jpg images? What is the difference between  and  ?

Second, do these expressions even work? I'm asking because I can't test them myself so if someone could that would be great. Ever since I added them I've never know for sure if they actually work properly.

Third, I would like two new expressions. One to prevent uploads of images with file names less than 'x' amount of characters (say 7, not including the file type). The second I would like to prevent uploads with certain words in them (say Tumblr and Screenshot). 