Zend_-mail and=0d=0a=3d=3d=3d=3d=3d

我正在编写一个帮助台管道处理程序,以将传入的电子邮件作为帮助台通知单答复。有些电子邮件收到的很好,有些则是乱七八糟的文本,=3d的所有内容都被塞进一个巨大的字符串中。有人知道如何将其解码成纯文本吗?

作为参考,这是我的邮件分析器函数:

public function parseEmailMessage(Zend_Mail_Message $msg)
{
    if ($msg->isMultiPart()) {
        $arrAttachments = array();
        $body = '';
        // Multipart Mime Message
        foreach (new RecursiveIteratorIterator($msg) as $part) {
            try {

                $mimeType = strtok($part->contentType, ';');

                // Parse file name
                preg_match('/name="(?<filename>[a-zA-Z0-9.\-_]+)"/is', $part->contentType, $attachmentName);

                // Append plaintext results to $body
                // All other content parts will be treated as attachments
                switch ($mimeType) {
                    case 'text/plain':
                        $body .= trim($part->getContent()) . "\n";
                        break;
                    case 'text/html':
                        $body .= trim(strip_tags($part->getContent));
                        break;
                    default:
                        $arrAttachments[] = array(
                            'attachment_mime' => $mimeType,
                            'attachment_name' => $this->filterFileName($attachmentName['filename']),
                            'base64data' => trim($part->getContent())
                        );
                }

            } catch (Zend_Mail_Exception $e) {
                // ignore
            }
        }

        return array($body, $arrAttachments);
    } else {
        // Plain text message
        return array(trim($msg->getContent()), array());
    }
}