Simple one... Please look.

Greetings. Can someone please enlighten me on the best way to get information from a comma delimited file, to a variable? Example. A client updates a comma delimited list of names to a directory on a server, my script would need to read in the entire list and turn it into a variable. Once it is in a variable, I can use explode() to parse it into an array. But how would I read that document? fopen()???? Thanks in advance friends. -NorthBayShane