我正在创建 google vcalender ICS 文件并使用 PHP 通过电子邮件发送。
但我面临的问题是时间没有在谷歌日历上正确显示。在我的示例中，我已经通过时间为上午 01:00:00（IST），但是当我导入显示 12am（IST）的 ics 文件日历时。
当我将我的谷歌日历设置时区更改为美国（EST）时，它显示时间为下午 1:30（EST），但它应该是下午 2:30（EST）。
我的代码有什么问题？
这是我生成 ics 文件并作为电子邮件发送的 PHP 代码：
$user_timezone = dynamic timezone; // my timezone = Asia/Kolkata
$demo_date = 2014-12-05;
$demo_time = 01:00:00 AM;
$meeting_date = $demo_date .' '.$demo_time;
date_default_timezone_set($user_timezone);
$date = date('Y-m-d H:i:s A', strtotime($meeting_date));
// Event time stamp
$timestamp = strtotime(date($meeting_date));
// Event start date and end date
$start_date = date('Ymd', strtotime($meeting_date)) ."T". date('H:i:s A', $timestamp);
$end_date = date('Ymd', strtotime($meeting_date)) ."T". date('H:i:s A', $timestamp);
//calender unique ID
$cal_uid = date('Ymd').'T'.date('His')."-".rand();
//Message send to Calender
$ical = "BEGIN:VCALENDAR\n";
$ical .= "VERSION:2.0\n";
$ical .= "PRODID:-//Forest//Forest Inquiry v1.0//EN\n";
$ical .= "CALSCALE:GREGORIAN\n";
$ical .= "METHOD:PUBLISH\n";
$ical .= "X-WR-CALNAME:Forest Inquiry\n";
$ical .= "X-MS-OLK-FORCEINSPECTOROPEN:TRUE\n";
$ical .= "BEGIN:VTIMEZONE\n";
$ical .= "X-WR-TIMEZONE:{$user_timezone}\n";
$ical .= "TZID:{$user_timezone}\n";
$ical .= "TZURL:http://tzurl.org/zoneinfo-outlook/{$user_timezone}\n";
$ical .= "X-LIC-LOCATION:{$user_timezone}\n";
$ical .= "END:VTIMEZONE\n";
$ical .= "BEGIN:VEVENT\n";
$ical .= "DTSTAMP:".date('Ymd\THis\Z')."\n";
$ical .= "DTSTART;TZID={$user_timezone}:{$start_date}\n";
$ical .= "DTEND;TZID={$user_timezone}:{$end_date}\n";
$ical .= "STATUS:CONFIRMED\n";
$ical .= "SUMMARY:{$subject}\n";
$ical .= "DESCRIPTION:{$meeting_description}\n";
$ical .= "ORGANIZER;CN=Forest:MAILTO:info@Forest.com\n";
$ical .= "CLASS:PUBLIC\n";
$ical .= "CREATED:{$start_date}Z\n";
$ical .= "LOCATION:{$meeting_location}\n";
$ical .= "URL:\n";
$ical .= "SEQUENCE:1\n";
$ical .= "LAST-MODIFIED:".date('Ymd\THis\Z')."\n";
$ical .= "UID:{$subject}-support@mysite.com\n";
$ical .= "END:VEVENT\n";
$ical .= "END:VCALENDAR";
$file_name = 'XYZ'.$first_name;
// Mail parameters
$newline = "\r\n";
$headers = "From:test\n";
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-Type: text/calendar; charset=utf-8; name=$file_name.ics; method=REQUEST".$newline;
$headers .= "Content-Disposition: inline; filename=$file_name.ics".$newline;
$headers .= "Content-Transfer-Encoding: 7bit";
mail('testing@gmail.com', $subject, $ical, $headers);
这是我的 ICS 文件：
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Forest//Forest Inquiry v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Forest Inquiry
X-MS-OLK-FORCEINSPECTOROPEN:TRUE
BEGIN:VTIMEZONE
TZID:Asia/Kolkata
TZURL:http://tzurl.org/zoneinfo-outlook/Asia/Kolkata
X-LIC-LOCATION:Asia/Kolkata
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20141205T104434Z
DTSTART;TZID=Asia/Kolkata:20141211T053000
DTEND;TZID=Asia/Kolkata:20141211T053000
STATUS:CONFIRMED
SUMMARY:Forest Inquiry by testing Testing
DESCRIPTION:First Name :testing\n
ORGANIZER;CN=Forest:MAILTO:info@Forest.com
CLASS:PUBLIC
CREATED:20141211T053000Z
LOCATION:At Forest
URL:
SEQUENCE:1
LAST-MODIFIED:20141205T104434Z
UID:Forest Inquiry by testing Testing-support@mysite.com
END:VEVENT
END:VCALENDAR