Drupal 7 db_query error

Please have a try and you will never see the error

$rows = array();/*while($row = db_fetch_object($result)) {$rows[] = $row;}*/foreach ($result as $row) {       $rows[] = $row;return $rows;

Please also try to change those:

$result = db_query("select * from {files} where fid = %d", $val['_fid']);while ($data = db_fetch_object($result)) {      $thefile = $data;}

to

$query = db_select('files', 'f')  ->fields('f')  ->condition('fid', $val['_fid']);$thefile = $query->execute()->fetchObject();

?