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PHP ICal Email

// 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 - Julian Young 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 .= "\n";
	$message .= "\n";
	$message .= '

Dear '.$firstname.' '.$lastname.',

'; $message .= '

Here is my HTML Email / Used for Meeting Description

'; $message .= "\n"; $message .= "\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; } }

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