SimpleEmailServiceMessage::setMessageFromFile PHP Method

    public function setMessageFromFile($textfile, $htmlfile = null)
    {
        if (file_exists($textfile) && is_file($textfile) && is_readable($textfile)) {
            $this->messagetext = file_get_contents($textfile);
        } else {
            $this->messagetext = null;
        }
        if (file_exists($htmlfile) && is_file($htmlfile) && is_readable($htmlfile)) {
            $this->messagehtml = file_get_contents($htmlfile);
        } else {
            $this->messagehtml = null;
        }
        return $this;
    }