calculating betweeen two date using php any one help me.
using one folder the files are stored in date format. i give start date and end date how to retrive between two date files .

Thanks..

convert the dates to epoch time [ http://en.wikipedia.org/wiki/Unix_time ], and simply do a numeric comparison.
See the php mktime() reference for hints:
http://www.php.net/manual/en/function.mktime.php