Drupal 7 - Import file from a tempory directory on the site into file field on the node

Drupal 7 file field question: Is it possible to ftp files to a temporary location, then move them into a file fiel开发者_如何学Pythond on a drupal node?

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for each file, call this function:

http://api.drupal.org/api/drupal/includes--file.inc/function/file_save_data