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WeBid：夏令时未正确计算的时区

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我目前正在使用开源应用程序：WeBid（可用here）

这是问题：

  • 用户在DB中存储了首选时区

  • 该站点在DB中存储了默认时区

  • 所有数据库存储日期都存储在"GMT-0"

应用程序无法正确计算DST（夏令时），因为它使用以下代码：

（包括/ functions_global.php）

$this->ctime = time() + (($this->SETTINGS['timecorrection'] + gmdate('I')) * 3600);
$this->tdiff = ($this->SETTINGS['timecorrection'] + gmdate('I')) * 3600;

gtpotyf解释说：

gmdate（'I'） - >如果DST处于活动状态则返回1，如果未处于活动状态则返回0 . 然而，由于gmdate总是使用GMT（0）并且该时区没有DST，它将始终返回0.使用日期（'I'）而不是gmdate（'I'）将更好地工作，但是仍然不正确，因为它使用了来自服务器的时区，但仍不是用户时区 .

WeBid的最新版本没有采用最终修正，请帮我解决这个问题 .

Source

php timezone dst

2 回答

  • 4

    为了正确理清时区，你需要做很多事情 .

    将服务器设置为UTC，以便PHP的 time 和 date 函数返回UTC时间戳 . （除了相关的功能，如 strftime .

    根据您的数据库，您也可以将其时区设置为UTC . MySQL关于这个主题的文档是here .

    如果尚未存储，则需要将存储在其中的日期时间迁移到UTC . （我不确定你对GMT-0的意思 . ）

    让用户选择PHP的DateTimeZone类支持的格式为“Europe / London”的时区 .

    经过一些研究，我把以下一系列时区放在一个下拉框中给用户，因为我不想重复（例如阿姆斯特丹和布鲁塞尔在同一时区 . ）我不会声称它尽管如此 . 根据您的用户群，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'
    );

    当日期从数据库中出来时，它们需要从UTC转换为用户的时区 .

    $timestamp = time(); // or a timestamp from your DB

# create server and user timezone objects
$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);
echo $dt->format('Y-m-d H:i:s'); // Still UTC

$dt->setTimezone($toZone);
echo $dt->format('Y-m-d H:i:s'); // Converted

    您需要通过WeBid应用程序并修改相应的部分才能正确转换 .

    所以，使用上面的代码，你需要一些像这样的函数：

    function getConvertedDateTimeObject($timestamp, $userTimezone){
    # create server and user timezone objects
    $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();
}

    然后在你的班上：

    $this->ctime = getUserTimestamp(time(), $userTimezone); // I assume you have access to the user's timezone?
$this->tdiff = getUserOffset(time(), $userTimezone);
    回复于
  • 0

    bcmcfc答案的替代解决方案（几乎说明了一切）：

    从WeBid中删除任何时区支持（至少禁用任何自定义）并将所有内容保存为UTC（如果尚未保存） .

    修改界面以使用Javascript显示日期和时间戳 . 浏览器将根据浏览器或操作系统的设置正确转换unix时间戳（don 't forget to multiply by 1000, Javascript' s Date 预计毫秒，而不是PHP中的秒数） .

    例如，不输出2012-08-18 09:33:43，而是输出 <script>document.write(new Date(1345282423*1000).toString());</script> ，其中 1345282423 直接从数据库获得，或者使用 strtotime .

    您只需要更改显示日期和时间戳的功能，并禁用时区自定义（强制UTC / GMT）（不要忘记 date_default_timezone_set("UTC"); ） .

    这对我来说似乎微不足道 .

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