使用phpmailer从本地主机向gmail发送电子邮件:SMTP connect()失败

我想从本地主机发送电子邮件到gmail，但它说"SMTP连接()失败"这是我的代码。我也试图改变配置php.ini和sendmail.ini，但没有运气。谢谢你。

    $mail = new PHPMailer;
    $mail->isSMTP();       
    $mail->SMTPSecure = 'ssl'; 
    $mail->Host = 'smtp.gmail.com'; 
    $mail->Port = 465;
    $mail->SMTPAuth = true;                               
    $mail->Username = 'asd@gmail.com';               
    $mail->Password = 'password';                   
    $mail->From = 'from@example.com';
    $mail->FromName = 'Mailer';
    $mail->addAddress('asd@gmail.com');           
    $mail->WordWrap = 50;                            
    $mail->isHTML(true);                          
    $mail->Subject = 'Email'
    $mail->Body    = "This is body";
    if(!$mail->send()) {
        echo 'Message could not be sent.';
        echo 'Mailer Error: ' . $mail->ErrorInfo;
    } else {
        echo 'Message has been sent';
    }