IMP::parseAddressList PHP Method

    public static function parseAddressList($in, array $opts = array())
    {
        $md = $GLOBALS['injector']->getInstance('IMP_Factory_Imap')->create()->config->maildomain;
        if ($in instanceof Horde_Mail_Rfc822_List) {
            $res = clone $in;
            foreach ($res->raw_addresses as $val) {
                if (is_null($val->host)) {
                    $val->host = $md;
                }
            }
        } else {
            $rfc822 = $GLOBALS['injector']->getInstance('Horde_Mail_Rfc822');
            $res = $rfc822->parseAddressList($in, array_merge(array('default_domain' => $md, 'validate' => false), $opts));
        }
        $res->setIteratorFilter(Horde_Mail_Rfc822_List::HIDE_GROUPS);
        return $res;
    }

 /**
  * Constructor.
  *
  * @param string $from           The email address of the original sender.
  * @param Horde_Mime_Headers $h  The headers object for the message.
  */
 public function __construct($from, Horde_Mime_Headers $h)
 {
     global $prefs;
     $addressList = $nameList = array();
     /* First we'll get a comma separated list of email addresses
      * and a comma separated list of personal names out of $from
      * (there just might be more than one of each). */
     $addr_list = IMP::parseAddressList($from);
     foreach ($addr_list as $addr) {
         if (!is_null($addr->mailbox)) {
             $addressList[] = $addr->bare_address;
         }
         if (!is_null($addr->personal)) {
             $nameList[] = $addr->personal;
         } elseif (!is_null($addr->mailbox)) {
             $nameList[] = $addr->mailbox;
         }
     }
     /* Define the macros. */
     if (is_array($message_id = $h->getValue('message-id'))) {
         $message_id = reset($message_id);
     }
     if (!($subject = $h->getValue('subject'))) {
         $subject = _("[No Subject]");
     }
     $udate = strtotime($h->getValue('date'));
     $match = array('/%n/' => "\n", '/%%/' => '%', '/%f/' => $from, '/%a/' => implode(', ', $addressList), '/%p/' => implode(', ', $nameList), '/%r/' => $h->getValue('date'), '/%d/' => strftime("%a, %d %b %Y", $udate), '/%x/' => strftime("%x", $udate), '/%c/' => strftime("%c", $udate), '/%m/' => $message_id, '/%s/' => $subject);
     $this->_text = preg_replace(array_keys($match), array_values($match), $prefs->getValue('attrib_text'));
 }