PHPMailer를 사용하여 PHP로 이메일을 보내는 방법

<?php
    require_once 'PHPMailer/PHPMailer.php';
    require_once 'PHPMailer/SMTP.php';

    $mail = new PHPMailerPHPMailerPHPMailer();
    $mail->SMTPDebug = 2;                                          
    $mail->isSMTP();                                                 
    $mail->Host       = 'smtp.qq.com';                     
    $mail->SMTPAuth   = true;                                                  
    $mail->Username   = 'sender@qq.com';                    
    $mail->Password   = '****';                                      
    $mail->SMTPSecure = 'ssl';                                                  
    $mail->Port       = 465;
    $mail->setFrom('sender@qq.com', 'Sender Name');
    $mail->addAddress('receiver@163.com', 'Receiver Name');
    $mail->isHTML(true);                              
    $mail->Subject = 'Subject of Email';                                                      
    $mail->Body    = 'This is the HTML message body <b>in bold!</b>';                            
    $mail->AltBody = 'This is the plain text message body for non-HTML mail clients';
    if(!$mail->send()) {
        echo 'Message could not be sent.';
        echo 'Mailer Error: ' . $mail->ErrorInfo;
    } else {
        echo 'Message has been sent';
    }
?>

if(!$mail->send()) {
    echo 'Message could not be sent.';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
    echo 'Message has been sent';
}

$mail->addCC('cc@example.com');
$mail->addBCC('bcc@example.com');
$mail->addAttachment('/var/tmp/file.tar.gz');
$mail->addAttachment('/tmp/image.jpg', 'new.jpg');