iCalendar .ics accept/decline on iOS

Question

I have created a php script that sends out iCalendar event invitations (based on RFC 5545). Everything works ok, but on iPhone (iOS 4.2.1) and iPad (iOS 5.1) I don\'t get an

Answer 1

After carefully reading the RFC, here's what I used and worked:

BEGIN:VCALENDAR
PRODID:-//Some organization//some application//EN
VERSION:2.0
METHOD:REQUEST
BEGIN:VEVENT
UID:20120925T072912Z-140@http://localhost/www/
CREATED:20120925T072912Z
DTSTAMP:20120922T090500Z
DTSTART:20120922T090500Z
DTEND:20120923T090500Z
DESCRIPTION:Please attend this sample meeting
SUMMARY:Invitation to attend training
LOCATION:Earth
ATTENDEE;RSVP=TRUE:mailto:periklis@example.com
ORGANIZER;CN=periklis@example.com:mailto:periklis@example.com
LAST-MODIFIED:20120922T090500Z
PRIORITY:5
SEQUENCE:0
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR

It's also worth mentioning that the above lines MUST be separated with \r\n. So I assigned each line to an array member and then imploded the array:

$message[]='BEGIN:VCALENDAR';
$message[]='PRODID:-//Some organization//some application//EN';
[...]
$message[]='END:VCALENDAR';

$message = implode("\r\n", $message);