如何使用核心php创建iCalendar（.ics）文件并在电子邮件正文中发送邀请请求？

Question

我已经成功在电子邮件上获取了iCalendar附件（.ics文件）。但是，现在，电子邮件正文为空。有没有办法填充电子邮件的正文并将.ics文件附加到同一电子邮件上？

期望电子邮件正文是这样的

enter image description here

到目前为止我的代码

  <?php 


$ics_data = 'BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN
CALSCALE:GREGORIAN
BEGIN:VEVENT
LOCATION:BTM Bangalore
DESCRIPTION:ICS Test Event
SUMMARY;LANGUAGE=en-US:Team Building meeting
DTSTART:20190712T214000
DTEND:20190712T225000
SUMMARY:
URL;VALUE=URI:dev.speakerengage.com
DTSTAMP:20190712T165600Z
UID:5d247ec5c0214
END:VEVENT
END:VCALENDARCould not access file: invite.ics
1
';

file_put_contents("invite.ics",$ics_data);



$html='<h4>Hello Friend,<br> This is a meeting request.</h4>';
echo smtp_mailer('manjunath.m@iverbinden.com','Dear User',$html);
function smtp_mailer($to,$subject, $msg){
    require_once("smtp/class.phpmailer.php");
    $mail = new PHPMailer(); 
    $mail->IsSMTP(); 
    $mail->SMTPDebug = 1; 
    $mail->SMTPAuth = true; 
    $mail->SMTPSecure = 'TLS'; 
    $mail->Host = "smtp.sendgrid.net";
    $mail->Port = 587; 
    $mail->IsHTML(true);
    $mail->CharSet = 'UTF-8';
    $mail->Username = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
    $mail->Password = "xxxxxxxxxxxxxxxxxxxxxxxxxx";
    $mail->SetFrom("noreply@iverbinden.com");
    $mail->addAttachment("invite.ics");
    $mail->Subject = $subject;
    $mail->Body =$msg;
    $mail->AddAddress($to);
    if(!$mail->Send()){
        return 0;
    }else{
        return 1;
    }
}

?>

有人可以帮我吗？预先感谢。