I am using PHP and VCal to send a meeting request to a user. The issue is, when the use receives the request, it does not give them the option to "Accept/Decline" the meeting. This is happening in OUTLOOK. The accept and decline button options are greyed out and the when the email is opened it says "No response required" I would like to make it so that the user has the option to decline or accept and DOES require a response. If I try to accept a test invite on my iphone, a message pops up that says "Your response to the invitation cannot be sent." Not sure what tweak I need to make in my VCAL code. Any idea?
EDIT TO POST: I figured out how to make the calendar event allow for accepting and denying caldendar invites by changing the 'METHOD:PUBLISH' instead of request.
EDITED ISSUE: Now the issue I am running into is that the user receiving the Vcalendar invite is able to edit the subject, and location and date of the event. How do I disable the ability to edit Calendar Invite details using VCal?
Thank you.
//Create Email Headers
$mime_boundary = "----Meeting Booking----".MD5(TIME());
$headers = "From: ".$from_name." <".$from_address.">\n";
$headers .= "Reply-To: ".$from_name." <".$from_address.">\n";
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-Type: multipart/alternative; boundary=\"$mime_boundary\"\n";
$headers .= "Content-class: urn:content-classes:calendarmessage\n";
//Create Email Body (HTML)
$message = "--$mime_boundary\r\n";
$message .= "Content-Type: text/html; charset=UTF-8\n";
$message .= "Content-Transfer-Encoding: 8bit\n\n";
$message .= "<html>\n";
$message .= "<body>\n";
$message .= '<p>'.$description.'</p>';
$message .= "</body>\n";
$message .= "</html>\n";
$message .= "--$mime_boundary\r\n";
$ical =
'BEGIN:VCALENDAR' . "\r\n" .
'PRODID:-//Microsoft Corporation//Outlook 16.0 MIMEDIR//EN' . "\r\n" .
'CALSCALE:GREGORIAN' . "\r\n" .
'VERSION:2.0' . "\r\n" .
'METHOD:REQUEST' . "\r\n" .
'BEGIN:VTIMEZONE' . "\r\n" .
'TZID:America/Chicago:' . "\r\n" .
'BEGIN:STANDARD' . "\r\n" .
'DTSTART:200911 01T020000' . "\r\n" .
'RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11' . "\r\n" .
'TZOFFSETFROM:-0400' . "\r\n" .
'TZOFFSETTO:-0500' . "\r\n" .
'TZNAME:EST' . "\r\n" .
'END:STANDARD' . "\r\n" .
'BEGIN:DAYLIGHT' . "\r\n" .
'DTSTART:20090301T020000' . "\r\n" .
'RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3' . "\r\n" .
'TZOFFSETFROM:-0500' . "\r\n" .
'TZOFFSETTO:-0400' . "\r\n" .
'TZNAME:EDST' . "\r\n" .
'END:DAYLIGHT' . "\r\n" .
'END:VTIMEZONE' . "\r\n" .
'BEGIN:VEVENT' . "\r\n" .
'ORGANIZER;CN="'.$from_name.'":MAILTO:'.$from_address. "\r\n" .
//'ATTENDEE;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN="'.$to_name.'";'.
'ATTENDEE;CN="'.$to_name.'";ROLE=REQ-PARTICIPANT;RSVP=TRUE:MAILTO:'.$to_address. "\r\n" .
'LAST-MODIFIED:' . date("Ymd\TGis") . "\r\n" .
'UID:'.date("Ymd\TGis", strtotime($startTime)).rand()."@".$domain."\r\n" .
'DTSTAMP:'.date("Ymd\TGis"). "\r\n" .
'DTSTART;TZID="Eastern Time":'.date("Ymd\THis", strtotime($startTime)). "\r\n" .
'DTEND;TZID="Eastern Time":'.date("Ymd\THis", strtotime($endTime)). "\r\n" .
'TRANSP:OPAQUE'. "\r\n" .
'SEQUENCE:1'. "\r\n" .
'SUMMARY:' . $subject . "\r\n" .
'LOCATION:' . $location . "\r\n" .
'CLASS:PUBLIC'. "\r\n" .
'PRIORITY:5'. "\r\n" .
'BEGIN:VALARM' . "\r\n" .
'TRIGGER:-PT15M' . "\r\n" .
'ACTION:DISPLAY' . "\r\n" .
'DESCRIPTION:Reminder' . "\r\n" .
'END:VALARM' . "\r\n" .
'END:VEVENT'. "\r\n" .
'END:VCALENDAR'. "\r\n";
$message .= 'Content-Type: text/calendar;name="meeting.ics";method=REQUEST'."\n";
$message .= "Content-Transfer-Encoding: 8bit\n\n";
$message .= $ical;
$mailsent = mail($to_address, $subject, $message, $headers);
The line starting with
ATTENDEEdefines the information required to respond to the request. In your code, it looks strange:As far as I know, the
:MAILTOpart belongs to the CN. Here's a line from an iCal file that works properly in Outlook and on iPhone:The e-mail address needs to be the address of the recipient of your request, not yours (obviously).