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PHP ICal Email

07.08.2009
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        // Send iCal Email Meeting Requests using PHP! Ensure those buttons show up in Outlook!
// Tested in Outlook 2003/2007, on Exchange Server 2003 Mailboxes, Google Calendar, Google Mail, Hotmail.
// Source - <a href="http://www.julian-young.com/2009/07/07/php-ical-email/">Julian Young</a> blog, includes downloadable source and example usage

//$firstname is the first name of target
//$lastname is the last name of target
//$email is the targets email address
//$meeting_date is straight from a DATETIME mysql field and assumes UTC.
//$meeting_name is the name of your meeting
//$meeting_duretion is the duration of your meeting in seconds (3600 = 1 hour)

function sendIcalEmail($firstname,$lastname,$email,$meeting_date,$meeting_name,$meeting_duration) {

	$from_name = "My Name";
	$from_address = "myname@mydomain.com";
	$subject = "Meeting Booking"; //Doubles as email subject and meeting subject in calendar
	$meeting_description = "Here is a brief description of my meeting\n\n";
	$meeting_location = "My Office"; //Where will your meeting take place
	
	
	//Convert MYSQL datetime and construct iCal start, end and issue dates
	$meetingstamp = strtotime($meeting_date . " UTC");    
	$dtstart= gmdate("Ymd\THis\Z",$meetingstamp);
	$dtend= gmdate("Ymd\THis\Z",$meetingstamp+$meeting_duration);
	$todaystamp = gmdate("Ymd\THis\Z");
	
	//Create unique identifier
	$cal_uid = date('Ymd').'T'.date('His')."-".rand()."@mydomain.com";
	
	//Create Mime Boundry
	$mime_boundary = "----Meeting Booking----".md5(time());
		
	//Create Email Headers
	$headers = "From: ".$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\n";
	$message .= "Content-Type: text/html; charset=UTF-8\n";
	$message .= "Content-Transfer-Encoding: 8bit\n\n";
	
	$message .= "<html>\n";
	$message .= "<body>\n";
	$message .= '<p>Dear '.$firstname.' '.$lastname.',</p>';
	$message .= '<p>Here is my HTML Email / Used for Meeting Description</p>';    
	$message .= "</body>\n";
	$message .= "</html>\n";
	$message .= "--$mime_boundary\n";
	
	//Create ICAL Content (Google rfc 2445 for details and examples of usage) 
	$ical =    'BEGIN:VCALENDAR
PRODID:-//Microsoft Corporation//Outlook 11.0 MIMEDIR//EN
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER:MAILTO:'.$from_address.'
DTSTART:'.$dtstart.'
DTEND:'.$dtend.'
LOCATION:'.$meeting_location.'
TRANSP:OPAQUE
SEQUENCE:0
UID:'.$cal_uid.'
DTSTAMP:'.$todaystamp.'
DESCRIPTION:'.$meeting_description.'
SUMMARY:'.$subject.'
PRIORITY:5
CLASS:PUBLIC
END:VEVENT
END:VCALENDAR';   
	
	$message .= 'Content-Type: text/calendar;name="meeting.ics";method=REQUEST\n';
	$message .= "Content-Transfer-Encoding: 8bit\n\n";
	$message .= $ical;            
	
	//SEND MAIL
	$mail_sent = @mail( $email, $subject, $message, $headers );
	
	if($mail_sent)     {
		return true;
	} else {
		return false;
	}   

}
    

Comments

Snippets Manager replied on Wed, 2009/07/08 - 7:04am

I've made some changes for better compatibility and there are is some discussion on variations of usage on my blog. Cheers.