Suppose you are sending an email in PHP and want to send iCal attachment. In PHP this can be achieved as below:
1. Create iCal file content and put in a variable (like $iCal here):
$iCal = "BEGIN:VCALENDAR\r\n VERSION:2.0\r\n METHOD:PUBLISH\r\n X-WR-CALNAME: DASN events | Dallas AfterSchool Network\r\n PRODID:-//Drupal iCal API//EN\r\n BEGIN:VEVENT\r\n UID:calendar:120:field_event_datetime:0:0\r\n SUMMARY:$classnames\r\n ORGANIZER;CN=$name:mailto:$email\r\n LOCATION:$where\r\n DESCRIPTION:$description\r\n DTSTART:$startDate\r\n URL;VALUE=URI:http://dasn.org/calendar/120\r\n END:VEVENT\r\n END:VCALENDAR\r\n";
2.Now $iCal can be appended to the email body and it will show up like an iCal event in the email as shown in this image:
3. If you are using sendgrid, you can send $iCal in parameters array like given below:
$params = array( 'api_user' => $user, 'api_key' => $pass, 'to' => $to, 'from' => $from, 'subject' => $subject, 'html' => $body, 'files[iCal.ics]' => $iCal );
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