list of files of what's in a folder?

[Prozac]

Is there a command that will return an array of the files that are in a folder on the server?
For example, something like:

getfilelist("levels/images/*.*");

and that returns an array

filelist={"image1.png","image2.gif","image2.mng"}

if there is a command that does something like this, what is it?
Not sure how to phrase the idea of this to put the description into a wiki search engine, so I hope someone here knows it.