为了正确处理时区，您需要采取一些措施。
将您的服务器设置为UTC，这样PHP的
time和
date函数会返回一个UTC时间戳（以及其他相关的函数，如
strftime）。
根据您的数据库，您还可以将其时区设置为UTC。 MySQL在此问题上的文档在
此处。
如果日期时间尚未存储为UTC，则需要将其迁移到UTC。（我不确定您所说的GMT-0是什么意思。）
让用户选择一个格式为“Europe/London”的时区，该格式由PHP的DateTimeZone类支持。
经过一些研究，我编写了以下时区数组，以便在下拉框中向用户呈现时区，因为我不希望出现重复（例如，阿姆斯特丹和布鲁塞尔位于同一时区）。但我并不认为这个列表是完美的。根据您的用户群体，您可能需要更详细地调查某些时区。
$timezones = array(
'Pacific/Midway' => '(UTC-11:00) Midway Island, Samoa',
'Pacific/Honolulu' => '(UTC-10:00) Hawaii-Aleutian',
'Pacific/Marquesas' => '(UTC-09:30) Marquesas Islands',
'Pacific/Gambier' => '(UTC-09:00) Gambier Islands',
'America/Anchorage' => '(UTC-09:00) Alaska',
'America/Ensenada' => '(UTC-08:00) Tijuana, Baja California',
'Etc/GMT+8' => '(UTC-08:00) Pitcairn Islands',
'America/Los_Angeles' => '(UTC-08:00) Pacific Time (US & Canada)',
'America/Denver' => '(UTC-07:00) Mountain Time (US & Canada)',
'America/Chihuahua' => '(UTC-07:00) Chihuahua, La Paz, Mazatlan',
'America/Dawson_Creek' => '(UTC-07:00) Arizona',
'America/Belize' => '(UTC-06:00) Saskatchewan, Central America',
'America/Cancun' => '(UTC-06:00) Guadalajara, Mexico City, Monterrey',
'Chile/EasterIsland' => '(UTC-06:00) Easter Island',
'America/Chicago' => '(UTC-06:00) Central Time (US & Canada)',
'America/New_York' => '(UTC-05:00) Eastern Time (US & Canada)',
'America/Havana' => '(UTC-05:00) Cuba',
'America/Bogota' => '(UTC-05:00) Bogota, Lima, Quito, Rio Branco',
'America/Caracas' => '(UTC-04:30) Caracas',
'America/Santiago' => '(UTC-04:00) Santiago',
'America/La_Paz' => '(UTC-04:00) La Paz',
'Atlantic/Stanley' => '(UTC-04:00) Falkland Islands',
'America/Campo_Grande' => '(UTC-04:00) Brazil',
'America/Goose_Bay' => '(UTC-04:00) Atlantic Time (Goose Bay)',
'America/Glace_Bay' => '(UTC-04:00) Atlantic Time (Canada)',
'America/St_Johns' => '(UTC-03:30) Newfoundland',
'America/Araguaina' => '(UTC-03:00) UTC-3',
'America/Montevideo' => '(UTC-03:00) Montevideo',
'America/Miquelon' => '(UTC-03:00) Miquelon, St. Pierre',
'America/Godthab' => '(UTC-03:00) Greenland',
'America/Argentina/Buenos_Aires' => '(UTC-03:00) Buenos Aires',
'America/Sao_Paulo' => '(UTC-03:00) Brasilia',
'America/Noronha' => '(UTC-02:00) Mid-Atlantic',
'Atlantic/Cape_Verde' => '(UTC-01:00) Cape Verde Is.',
'Atlantic/Azores' => '(UTC-01:00) Azores',
'Europe/Dublin' => '(UTC) Irish Standard Time : Dublin',
'Europe/Lisbon' => '(UTC) Western European Time : Lisbon',
'Europe/London' => '(GMT) Greenwich Mean Time : London, Belfast',
'Africa/Abidjan' => '(GMT) Monrovia, Reykjavik',
'Europe/Amsterdam' => '(UTC+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna',
'Europe/Belgrade' => '(UTC+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague',
'Europe/Brussels' => '(UTC+01:00) Brussels, Copenhagen, Madrid, Paris',
'Africa/Algiers' => '(UTC+01:00) West Central Africa',
'Africa/Windhoek' => '(UTC+01:00) Windhoek',
'Asia/Beirut' => '(UTC+02:00) Beirut',
'Africa/Cairo' => '(UTC+02:00) Cairo',
'Asia/Gaza' => '(UTC+02:00) Gaza',
'Africa/Johannesburg' => '(UTC+02:00) Johannesburg, Harare, Pretoria',
'Asia/Jerusalem' => '(UTC+02:00) Jerusalem',
'Europe/Athens' => '(UTC+02:00) Athens',
'Europe/Minsk' => '(UTC+02:00) Minsk',
'Asia/Damascus' => '(UTC+02:00) Syria',
'Europe/Moscow' => '(UTC+03:00) Moscow, St. Petersburg, Volgograd',
'Africa/Addis_Ababa' => '(UTC+03:00) Nairobi',
'Asia/Tehran' => '(UTC+03:30) Tehran',
'Asia/Dubai' => '(UTC+04:00) Abu Dhabi, Muscat',
'Asia/Yerevan' => '(UTC+04:00) Yerevan',
'Asia/Kabul' => '(UTC+04:30) Kabul',
'Asia/Yekaterinburg' => '(UTC+05:00) Ekaterinburg',
'Asia/Tashkent' => '(UTC+05:00) Tashkent',
'Asia/Kolkata' => '(UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi',
'Asia/Katmandu' => '(UTC+05:45) Kathmandu',
'Asia/Dhaka' => '(UTC+06:00) Astana, Dhaka',
'Asia/Novosibirsk' => '(UTC+06:00) Novosibirsk',
'Asia/Rangoon' => '(UTC+06:30) Yangon (Rangoon)',
'Asia/Bangkok' => '(UTC+07:00) Bangkok, Hanoi, Jakarta',
'Asia/Krasnoyarsk' => '(UTC+07:00) Krasnoyarsk',
'Asia/Hong_Kong' => '(UTC+08:00) Beijing, Chongqing, Hong Kong, Urumqi',
'Asia/Irkutsk' => '(UTC+08:00) Irkutsk, Ulaan Bataar',
'Australia/Perth' => '(UTC+08:00) Perth',
'Australia/Eucla' => '(UTC+08:45) Eucla',
'Asia/Tokyo' => '(UTC+09:00) Osaka, Sapporo, Tokyo',
'Asia/Seoul' => '(UTC+09:00) Seoul',
'Asia/Yakutsk' => '(UTC+09:00) Yakutsk',
'Australia/Adelaide' => '(UTC+09:30) Adelaide',
'Australia/Darwin' => '(UTC+09:30) Darwin',
'Australia/Sydney' => '(UTC+10:00) Sydney, Canberra, Brisbane',
'Australia/Hobart' => '(UTC+10:00) Hobart',
'Asia/Vladivostok' => '(UTC+10:00) Vladivostok',
'Australia/Lord_Howe' => '(UTC+10:30) Lord Howe Island',
'Etc/GMT-11' => '(UTC+11:00) Solomon Is., New Caledonia',
'Asia/Magadan' => '(UTC+11:00) Magadan',
'Pacific/Norfolk' => '(UTC+11:30) Norfolk Island',
'Asia/Anadyr' => '(UTC+12:00) Anadyr, Kamchatka',
'Pacific/Auckland' => '(UTC+12:00) Auckland, Wellington',
'Etc/GMT-12' => '(UTC+12:00) Fiji, Kamchatka, Marshall Is.',
'Pacific/Chatham' => '(UTC+12:45) Chatham Islands',
'Pacific/Tongatapu' => '(UTC+13:00) Nuku Alofa',
'Pacific/Kiritimati' => '(UTC+14:00) Kiritimati'
);
当日期从您的数据库中出来时，它们需要从UTC转换为用户的时区。
$timestamp = time();
$fromZone = new DateTimeZone('UTC');
$toZone = new DateTimeZone($userTimezone);
$time = date('Y-m-d H:i:s', $timestamp);
$dt = new DateTime($time, $fromZone);
echo $dt->format('Y-m-d H:i:s');
$dt->setTimezone($toZone);
echo $dt->format('Y-m-d H:i:s');
您需要通过 WeBid 应用程序并修改适当的部分以正确转换。
因此，使用上述代码，您需要编写一些函数，这些函数执行以下操作：
function getConvertedDateTimeObject($timestamp, $userTimezone){
$fromZone = new DateTimeZone('UTC'); // UTC
$toZone = new DateTimeZone($userTimezone); // Europe/London, or whatever it happens to be
$time = date('Y-m-d H:i:s', $timestamp);
$dt = new DateTime($time, $fromZone);
$dt->setTimezone($toZone);
return $dt;
}
function getUserTimestamp($timestamp, $userTimezone){
$dt = getConvertedDateTimeObject($timestamp, $userTimezone);
return $dt->getTimestamp();
}
function getUserOffset($timestamp, $userTimezone){
$dt = getConvertedDateTimeObject($timestamp, $userTimezone);
return $dt->getOffset();
}
然后在你的类中：
$this->ctime = getUserTimestamp(time(), $userTimezone);
$this->tdiff = getUserOffset(time(), $userTimezone);
Europe/London。请参阅 bcmcfc 的答案，这是唯一解决问题的方法。 - oxygen