searching for files in a directory with a specific structure.

Hi, I have a directory which has thousands of files based on date. for example yyyymmdd-number(auto increment).txt 20050101-0001.txt,20050101-0002.txt............................20050101-0210.txt 20050102-0001.txt,20050102-0002.txt..............................20050102-0141.txt and many other files, but i want to extract data from the files with the above format. I have seen in the php documentation for reading a directory,but not files with a specific structure.i could not able to write the correct regular expression for the filename match. can some one give an idea. thanks babu. --------------------------------- Yahoo! Messenger NEW - crystal clear PC to PCcalling worldwide with voicemail