function createEventCalendar($start, $end, $name, $description, $location) {
    $event = array();
    $rand = rand(5, 1000);

    $event['name'] = $name;
    $event['data'] = "BEGIN:VCALENDARnVERSION:2.0nPRODID:-//MYPROJECT//ENnBEGIN:VEVENTnDTSTAMP:".date("YmdTHis")."nSTATUS:CONFIRMEDnUID:".$rand."nDTSTART:".date("YmdTHis", strtotime($start))."nDTEND:".date("YmdTHis", strtotime($end))."nSUMMARY:".$name."nDESCRIPTION:".$description."nX-ALT-DESC;FMTTYPE=text/html:".$description."nLOCATION:".$location."nEND:VEVENTnEND:VCALENDAR";

    return $event;
}

public function downloadEventCalendar($event) {
    header("Content-type:text/calendar");
    header('Content-Disposition: attachment; filename="'.$event['name'].'.ics"');
    header('Content-Length: '.strlen($event['data']));
    header('Connection: close');

    echo $event['data'];
    exit();
}