Hi, maybe something like this would do: ( warning: it is just a sketch,and probably will not run ) 1. there are 4 files on the server: a) check-flag b) start-watch.php c) stop-watch.php d) watch.php 2. watch.php: // in the check-flag file we have a flag which turns off/on the checker $flag_file = 'check-flag'; $fd = fopen($flag_file, 'r'); $go = fread($fd); // we shall get 0 - stop, 1 - go // the loop runs as long as there is 1 in 'check-flag' file while ( $go ) { $dir_state = get_the_state_of_the_dir(); $old_dir_state = get_previous_state_of_the_dir(); if( compare_the_dirs( $dir_state, $old_dir_state)) { // the state is different - something has been uploaded // do somethnig .... } $result = write_previous_dir_state($old_dir_state); rewind_the_file_position_to_start($fd); $go = fread($fd); } // end of the loop 3. start-watch.php if( check_the_identity_and_privileges_of_the_user() ) { set_flag_in_the_file( 'check-flag', 1); } 4. stop-watch.php if( check_the_identity_and_privileges_of_the_user() ) { set_flag_in_the_file( 'check-flag', 0); } it is just a rough idea written down with pseudo-php, but You shall get the idea greetings. Marcin -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php