require_once "swiftmailer/swiftmailer/lib/swift_required.php";
private function send_mail($total_google_num){
        $subject        = 'Subject';
        $from           = array('example_1@gmail.com' =>'Your Name');
        $to             = array('example_2@gmail.com'  => 'Recipient1 Name');
        $text           = "text message";
        $html           = "html message";
        $transport      = \Swift_SmtpTransport::newInstance("smtp.gmail.com")
                            ->setPort(465)
                            ->setEncryption('ssl')
                            ->setUsername(your_gmail_username)
                            ->setPassword(your_gmail_password);
        $swift          = \Swift_Mailer::newInstance($transport);

        $message        = (new \Swift_Message($subject))
                            ->setFrom($from)
                            ->setBody($html, 'text/html')
                            ->setTo($to)
                            ->addPart($text, 'text/plain');

        $failures       = null;
        if ($recipients = $swift->send($message, $failures))
        {
            echo 'Message successfully sent!';
        } else {
            echo "There was an error:\n";
            print_r($failures);
        }
}