Attaching files to nodes programmatically in Drupal 7
$filename = 'image.txt'; $image = file_get_contents('http://www.ibiblio.org/wm/paint/auth/gogh/gogh.white-house.jpg'); $file = file_save_data($image, 'public://' . $filename, FILE_EXISTS_RENAME); $node->field_image = array(LANGUAGE_NONE => array('0' => (array)$file)); Source from.... http://stackoverflow.com/questions/5129559/attaching-files-to-nodes-programmatically-in-drupal-7