I have been working on flatfile and directory system in PHP and not that I have got the script working I want to make it more secure. What I have is one directory with sub-directorys insided them and insided the subdirectorys are about 20 files each.
directory/ sub1/ sub2/
When the script is working out what directory to open it works like this:
What I want to be able to do is stop people from going down directorys (../../filename) because this could be a big security risk. What I want to know is if there is a better way than !preg_match('../',$filename).