How to get the article's file/blob attribute


$fieldset = new mxFieldset();
$fieldset->getBy( array( 'frmid' => $formsetid, 'column' => 'attachment1'));
if( 0 == $fieldset->id) {
  echo 'error: ' . $fieldset->getLastErrorMessage();
  return;
}

$blob = $article->getBlobData( $fieldset, true);
if( $blob && 0 id ) {
  $blob->contenttype data size filename <==== The original file name when being uploaded.
}