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Creating an ICS file from PHP

Posted on 2013-06-19
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Last Modified: 2013-06-19
I am trying to create an ICS file from a php script, and everything works fine, except for my times.

I'm not sure where to go or what to look for but all the times are wrong. The dates of the event are correct, but my start and end time will be a few hours before the expected event.

The start & end dates for this particular one is 6/19/2013 8am until 6/19/2013 at 9:30am

The times given in the ICS file are from 3:00am until 4:30am

$fullStart = $firstDay . ' ' . $startTime;
	$fullEnd = $returnDay . ' ' . $endTime;
		
		
	$startDate = date("M j, Y H:i", strtotime($fullStart));
	$endDate = date("M j, Y H:i", strtotime($fullEnd));
	
	$newStartTime = explode(":", $startTime);
	$Start1 = $newStartTime[0];
	$Start2 = $newStartTime[1];
	
	$startTime = $Start1.$Start2;
	
	$newEndTime = explode(":", $endTime);
	$End1 = $newEndTime[0];
	$End2 = $newEndTime[1];
	
	$endTime = $End1.$End2;
	
	$title = $userNotes;
	$description = "";
	$location = $resourceNeeded;
	$start_date = $startDate;
	$end_date = $endDate;
	$start_time = $_POST['startTime'];
	$end_time = $_POST['endTime'];
	
	$file_name = microtime(true) .'.vcs';

	$description = str_replace(array("\r\n", "\n"), array('=0D=0A', '=0D=0A'), $description);
	$str_start_date = strtotime($start_date);
	$str_end_date = strtotime($end_date);

	$start_time = date("Ymd", $str_start_date) .'T'. date("H", $str_start_date) . date("i", $str_start_date) .'00Z';

	if($str_end_date !== false){
	$end_time = date("Ymd", $str_end_date) .'T'.date("H", $str_end_date) . date("i", $str_end_date).'00Z';
	}

	$text_vcs = '';
	$text_vcs .= "BEGIN:VCALENDAR"."\n";
	$text_vcs .= "PRODID:-//Microsoft Corporation//Outlook 11.0 MIMEDIR//EN"."\n";
	$text_vcs .= "VERSION:1.0"."\n";
	$text_vcs .= "PRODID:-//Microsoft Corporation//Outlook 11.0 MIMEDIR//EN"."\n";
	$text_vcs .= "VERSION:1.0"."\n";
	$text_vcs .= "BEGIN:VEVENT"."\n";

	$text_vcs .= "DTSTART:".$start_time."\n";

	if($end_time) {
	$text_vcs .= "DTEND:". $end_time ."\n";
	}

	$text_vcs .= "LOCATION;ENCODING=QUOTED-PRINTABLE:". $location ."\n";
	$text_vcs .= "UID:040000008200E00074C5B7101A82E00800000000109E60CBFACAC7010000000000000000100"."\n";
	$text_vcs .= " 000004844976B382CE44C937F56D327FEE354"."\n";
	$text_vcs .= "DESCRIPTION;ENCODING=QUOTED-PRINTABLE:". $description ."=0D=0A"."\n";
	$text_vcs .= "SUMMARY;ENCODING=QUOTED-PRINTABLE:". $title ."\n";
	$text_vcs .= "END:VEVENT"."\n";
	$text_vcs .= "END:VCALENDAR"."\n";

	ini_set('zlib.output_compression','Off');

	header('Pragma: public');
	header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
	header('Last-Modified: '. gmdate('D, d M Y H:i:s') . ' GMT');
	header('Cache-Control: no-store, no-cache, must-revalidate');
	header('Cache-Control: pre-check=0, post-check=0, max-age=0');
	header("Pragma: no-cache");
	header("Expires: 0");
	header('Content-Transfer-Encoding: none');
	header('Content-Type: application/force-download;');
	header('Content-Disposition: attachment; filename="'. $file_name .'"');

	echo $text_vcs;
		}
	}

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Question by:t3chguy
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2 Comments
 
LVL 7

Accepted Solution

by:
Robert Saylor earned 500 total points
ID: 39260724
I used this and it works on Outlook and Apple.

usage:

                $result = sendIcalEmail($firstname,$lastname,$email,$meeting_date,$meeting_name,$meeting_duration,$meeting_text);

Credits: I forgot where I downloaded this code from...

//$firstname is the first name of target
//$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,$meeting_text) {

        $from_name = "Your company Here";
        $from_address = "info@yourname.com";
        $subject = "$meeting_name"; //Doubles as email subject and meeting subject in calendar
        $meeting_description = "$meeting_text\n\n";
        $meeting_location = "Your location here"; //Where will your meeting take place


        //Convert MYSQL datetime and construct iCal start, end and issue dates
        $meetingstamp = STRTOTIME($meeting_date . " EDT");
        $dtstart= GMDATE("Ymd\THis\Z",$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()."@yournamehere.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 .= "$meeting_date\n";
        $message .= '<p>'.$meeting_text.'</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;
        }

}

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Author Closing Comment

by:t3chguy
ID: 39260822
Simple, easy to follow script.  Thanks so much!
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