how do I do file maintenance with PHP?

Ok here is the deal. I have a Linux server running PHP4 and MySQL and a directory full of images. The images that are currently being used should be listed in a table (members) in a column titled "pic1". What is the best way to pull the file names of the files and check them against the files in the table? I want all files that are not listed in the table to be deleted. Also, is there a way to limit file size? I don't want new images to be accepted if they exceed 250k. It takes too long for images to display if they are larger then that. Thanks in advance for any help. Kenneth R Zink II Hellcat1@S-Series.Org ICQ# 5095094 '87 2.8L TBI GMC S-15 Ext. Cab (Hurricane) ...524 in the works !!! http://www.s-series.org/htm/windstorm/project-windstorm.htm '85 3.4L Carbed Chevy S-10 Blazer (FireStorm) ...Soon to be 3.4L SFI DIS !!! http://www.s-series.org/htm/firestorm/firestorm.htm Racing by the Grace of God!!