Horde_Mime_Part::getPart PHP Method

    public function getPart($id)
    {
        return $this[$id];
    }

 /**
  * Determines if a MIME type is an attachment.
  * For our purposes, an attachment is any MIME part that can be
  * downloaded by itself (i.e. all the data needed to view the part is
  * contained within the download data).
  *
  * @param string $id         The MIME Id for the part we are checking.
  * @param string $mime_type  The MIME type.
  *
  * @return boolean  True if an attachment.
  * @todo Pass a single mime part as parameter.
  */
 public function isAttachment($id, $mime_type)
 {
     switch ($mime_type) {
         case 'text/plain':
             if (!($this->_base->findBody('plain') == $id)) {
                 return true;
             }
             return false;
         case 'text/html':
             if (!($this->_base->findBody('html') == $id)) {
                 return true;
             }
             return false;
         case 'application/pkcs7-signature':
         case 'application/x-pkcs7-signature':
             return false;
     }
     if ($this->_base->getPart($id)->getDisposition() == 'attachment') {
         return true;
     }
     list($ptype, ) = explode('/', $mime_type, 2);
     switch ($ptype) {
         case 'message':
             return in_array($mime_type, array('message/rfc822', 'message/disposition-notification'));
         case 'multipart':
             return false;
         default:
             return true;
     }
 }