Zend_Mail::getBodyText PHP Method

    public function getBodyText($textOnly = false)
    {
        if ($textOnly && $this->_bodyText) {
            $body = $this->_bodyText;
            return $body->getContent();
        }
        return $this->_bodyText;
    }

    /**
     * Generate MIME compliant message from the current configuration
     *
     * If both a text and HTML body are present, generates a
     * multipart/alternative Zend_Mime_Part containing the headers and contents
     * of each. Otherwise, uses whichever of the text or HTML parts present.
     *
     * The content part is then prepended to the list of Zend_Mime_Parts for
     * this message.
     *
     * @return void
     */
    protected function _buildBody()
    {
        if (($text = $this->_mail->getBodyText())
            && ($html = $this->_mail->getBodyHtml()))
        {
            // Generate unique boundary for multipart/alternative
            $mime = new Zend_Mime(null);
            $boundaryLine = $mime->boundaryLine($this->EOL);
            $boundaryEnd  = $mime->mimeEnd($this->EOL);

            $text->disposition = false;
            $html->disposition = false;

            $body = $boundaryLine
                  . $text->getHeaders($this->EOL)
                  . $this->EOL
                  . $text->getContent($this->EOL)
                  . $this->EOL
                  . $boundaryLine
                  . $html->getHeaders($this->EOL)
                  . $this->EOL
                  . $html->getContent($this->EOL)
                  . $this->EOL
                  . $boundaryEnd;

            $mp           = new Zend_Mime_Part($body);
            $mp->type     = Zend_Mime::MULTIPART_ALTERNATIVE;
            $mp->boundary = $mime->boundary();

            $this->_isMultipart = true;

            // Ensure first part contains text alternatives
            array_unshift($this->_parts, $mp);

            // Get headers
            $this->_headers = $this->_mail->getHeaders();
            return;
        }

        // If not multipart, then get the body
        if (false !== ($body = $this->_mail->getBodyHtml())) {
            array_unshift($this->_parts, $body);
        } elseif (false !== ($body = $this->_mail->getBodyText())) {
            array_unshift($this->_parts, $body);
        }

        if (!$body) {
            throw new Zend_Mail_Transport_Exception('No body specified');
        }

        // Get headers
        $this->_headers = $this->_mail->getHeaders();
        $headers = $body->getHeadersArray($this->EOL);
        foreach ($headers as $header) {
            // Headers in Zend_Mime_Part are kept as arrays with two elements, a
            // key and a value
            $this->_headers[$header[0]] = array($header[1]);
        }
    }