require_once 'swiftmailer/lib/swift_required.php';

class Email_Message {

public $transport;

public function __construct($host,$port, $useremail,$emailpassword) {
   $this->transport = Swift_SmtpTransport::newInstance($host,$port,'ssl') //'ssl://smtp.gmail.com', 465
            ->setUsername($useremail)
            ->setPassword($emailpassword);
}

public function SendEmail($subject, $MessageBody, $from = array(), $to = array()){

    $mailer = Swift_Mailer::newInstance($this->transport);

    $message = Swift_Message::newInstance($subject); // subject

    $message->setFrom($from); // sender
    $message->setTo($to); // Receiver

    $message->setBody($MessageBody); // message body with either text or HTML

    $send = $mailer->send($message,$failuers);
    return $send;
}

$EmailClass = new Email_Message('smtp.gmail.com', 465, "myemail@gmail.com", "mypassword");

$subject = "TESTING";
$from = array('myemail@gmail.com' => 'My Name');

$to = array('useremail@mail.com' => 'username');

$MessageBody = "testing";

$check_Mail = $EmailClass->SendEmail($subject, $MessageBody, $from, $to);

if ($check_Mail){
    echo "Mail Sent";
}
else {
    echo $check_Mail;
}

<br />
<b>Fatal error</b>:  Uncaught exception 'Swift_TransportException' with message
'Connection could not be established with host smtp.gmail.com
[php_network_getaddresses: getaddrinfo failed: No such host is known.  #0]'
in   C:xampphtdocsmy project directoryswiftmailerlibclassesSwiftTransportStreamBuffer.php:269
Stack trace: