php获取当地时间 time zone

关联：php获得可靠的精准的当前时间 ( 通过授时服务器 )

PHP5.2.4之前的版本无需设置时区。下面是修改PHP时区的三个办法。

1、修改PHP.ini这个文件
找到date.timezone这行，去掉前面的分号，改成：

date.timezone = Asia/Shanghai

2、修改 .htaccess文件
修改.htaccess文件有两种办法，下面的两条语句只要有一条即可

php_value date.timezone Asia/Shanghai
SetEnv TZ Asia/Shanghai

3、修改PHP代码
也是下面的两条语句只要其中的一句即可

date_default_timezone_set('Asia/Shanghai');
ini_set('date.timezone','Asia/Shanghai');

例如： <?php date_default_timezone_set('Asia/Shanghai'); ?>

<?php
include('tz.php');echo get_localtime(time(),'Asia/Hong_Kong'); // local time//get_alltime(time()); // global time?>

具体见附件；

例外，也收集了一些有关时区的动动；

1. PHP TimeZone Array

<?php$timezoneTable = array("-12" => "(GMT -12:00) Eniwetok, Kwajalein","-11" => "(GMT -11:00) Midway Island, Samoa","-10" => "(GMT -10:00) Hawaii","-9" => "(GMT -9:00) Alaska","-8" => "(GMT -8:00) Pacific Time (US &amp; Canada)","-7" => "(GMT -7:00) Mountain Time (US &amp; Canada)","-6" => "(GMT -6:00) Central Time (US &amp; Canada), Mexico City","-5" => "(GMT -5:00) Eastern Time (US &amp; Canada), Bogota, Lima","-4" => "(GMT -4:00) Atlantic Time (Canada), Caracas, La Paz","-3.5" => "(GMT -3:30) Newfoundland","-3" => "(GMT -3:00) Brazil, Buenos Aires, Georgetown","-2" => "(GMT -2:00) Mid-Atlantic","-1" => "(GMT -1:00 hour) Azores, Cape Verde Islands","0" => "(GMT) Western Europe Time, London, Lisbon, Casablanca","1" => "(GMT +1:00 hour) Brussels, Copenhagen, Madrid, Paris","2" => "(GMT +2:00) Kaliningrad, South Africa","3" => "(GMT +3:00) Baghdad, Riyadh, Moscow, St. Petersburg","3.5" => "(GMT +3:30) Tehran","4" => "(GMT +4:00) Abu Dhabi, Muscat, Baku, Tbilisi","4.5" => "(GMT +4:30) Kabul","5" => "(GMT +5:00) Ekaterinburg, Islamabad, Karachi, Tashkent","5.5" => "(GMT +5:30) Bombay, Calcutta, Madras, New Delhi","6" => "(GMT +6:00) Almaty, Dhaka, Colombo","7" => "(GMT +7:00) Bangkok, Hanoi, Jakarta","8" => "(GMT +8:00) Beijing, Perth, Singapore, Hong Kong","9" => "(GMT +9:00) Tokyo, Seoul, Osaka, Sapporo, Yakutsk","9.5" => "(GMT +9:30) Adelaide, Darwin","10" => "(GMT +10:00) Eastern Australia, Guam, Vladivostok","11" => "(GMT +11:00) Magadan, Solomon Islands, New Caledonia","12" => "(GMT +12:00) Auckland, Wellington, Fiji, Kamchatka"
);

    $timezones = array('-12'=>'Pacific/Kwajalein','-11'=>'Pacific/Samoa','-10'=>'Pacific/Honolulu','-9'=>'America/Juneau','-8'=>'America/Los_Angeles','-7'=>'America/Denver','-6'=>'America/Mexico_City','-5'=>'America/New_York','-4'=>'America/Caracas','-3.5'=>'America/St_Johns','-3'=>'America/Argentina/Buenos_Aires','-2'=>'Atlantic/Azores',// no cities here so just picking an hour ahead'-1'=>'Atlantic/Azores','0'=>'Europe/London','1'=>'Europe/Paris','2'=>'Europe/Helsinki','3'=>'Europe/Moscow','3.5'=>'Asia/Tehran','4'=>'Asia/Baku','4.5'=>'Asia/Kabul','5'=>'Asia/Karachi','5.5'=>'Asia/Calcutta','6'=>'Asia/Colombo','7'=>'Asia/Bangkok','8'=>'Asia/Singapore','9'=>'Asia/Tokyo','9.5'=>'Australia/Darwin','10'=>'Pacific/Guam','11'=>'Asia/Magadan','12'=>'Asia/Kamchatka');

        $zones = array("Pacific/Midway"                 => "(GMT-11:00) Midway Island, Samoa","America/Adak"                   => "(GMT-10:00) Hawaii-Aleutian","Etc/GMT+10"                     => "(GMT-10:00) Hawaii","Pacific/Marquesas"              => "(GMT-09:30) Marquesas Islands","Pacific/Gambier"                => "(GMT-09:00) Gambier Islands","America/Anchorage"              => "(GMT-09:00) Alaska","America/Ensenada"               => "(GMT-08:00) Tijuana, Baja California","Etc/GMT+8"                      => "(GMT-08:00) Pitcairn Islands","America/Los_Angeles"            => "(GMT-08:00) Pacific Time (US &amp; Canada)","America/Denver"                 => "(GMT-07:00) Mountain Time (US &amp; Canada)","America/Chihuahua"              => "(GMT-07:00) Chihuahua, La Paz, Mazatlan","America/Dawson_Creek"           => "(GMT-07:00) Arizona","America/Belize"                 => "(GMT-06:00) Saskatchewan, Central America","America/Cancun"                 => "(GMT-06:00) Guadalajara, Mexico City, Monterrey","Chile/EasterIsland"             => "(GMT-06:00) Easter Island","America/Chicago"                => "(GMT-06:00) Central Time (US &amp; Canada)","America/New_York"               => "(GMT-05:00) Eastern Time (US &amp; Canada)","America/Havana"                 => "(GMT-05:00) Cuba","America/Bogota"                 => "(GMT-05:00) Bogota, Lima, Quito, Rio Branco","America/Caracas"                => "(GMT-04:30) Caracas","America/Santiago"               => "(GMT-04:00) Santiago","America/La_Paz"                 => "(GMT-04:00) La Paz","Atlantic/Stanley"               => "(GMT-04:00) Faukland Islands","America/Campo_Grande"           => "(GMT-04:00) Brazil","America/Goose_Bay"              => "(GMT-04:00) Atlantic Time (Goose Bay)","America/Glace_Bay"              => "(GMT-04:00) Atlantic Time (Canada)","America/St_Johns"               => "(GMT-03:30) Newfoundland","America/Araguaina"              => "(GMT-03:00) UTC-3","America/Montevideo"             => "(GMT-03:00) Montevideo","America/Miquelon"               => "(GMT-03:00) Miquelon, St. Pierre","America/Godthab"                => "(GMT-03:00) Greenland","America/Argentina/Buenos_Aires" => "(GMT-03:00) Buenos Aires","America/Sao_Paulo"              => "(GMT-03:00) Brasilia","America/Noronha"                => "(GMT-02:00) Mid-Atlantic","Atlantic/Cape_Verde"            => "(GMT-01:00) Cape Verde Is","Atlantic/Azores"                => "(GMT-01:00) Azores","Europe/Belfast"                 => "(GMT) Greenwich Mean Time : Belfast","Europe/Dublin"                  => "(GMT) Greenwich Mean Time : Dublin","Europe/Lisbon"                  => "(GMT) Greenwich Mean Time : Lisbon","Europe/London"                  => "(GMT) Greenwich Mean Time : London","Africa/Abidjan"                 => "(GMT) Monrovia, Reykjavik","Europe/Amsterdam"               => "(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna","Europe/Belgrade"                => "(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague","Europe/Brussels"                => "(GMT+01:00) Brussels, Copenhagen, Madrid, Paris","Africa/Algiers"                 => "(GMT+01:00) West Central Africa","Africa/Windhoek"                => "(GMT+01:00) Windhoek","Asia/Beirut"                    => "(GMT+02:00) Beirut","Africa/Cairo"                   => "(GMT+02:00) Cairo","Asia/Gaza"                      => "(GMT+02:00) Gaza","Africa/Blantyre"                => "(GMT+02:00) Harare, Pretoria","Asia/Jerusalem"                 => "(GMT+02:00) Jerusalem","Europe/Minsk"                   => "(GMT+02:00) Minsk","Asia/Damascus"                  => "(GMT+02:00) Syria","Europe/Moscow"                  => "(GMT+03:00) Moscow, St. Petersburg, Volgograd","Africa/Addis_Ababa"             => "(GMT+03:00) Nairobi","Asia/Tehran"                    => "(GMT+03:30) Tehran","Asia/Dubai"                     => "(GMT+04:00) Abu Dhabi, Muscat","Asia/Yerevan"                   => "(GMT+04:00) Yerevan","Asia/Kabul"                     => "(GMT+04:30) Kabul","Asia/Yekaterinburg"             => "(GMT+05:00) Ekaterinburg","Asia/Tashkent"                  => "(GMT+05:00) Tashkent","Asia/Kolkata"                   => "(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi","Asia/Katmandu"                  => "(GMT+05:45) Kathmandu","Asia/Dhaka"                     => "(GMT+06:00) Astana, Dhaka","Asia/Novosibirsk"               => "(GMT+06:00) Novosibirsk","Asia/Rangoon"                   => "(GMT+06:30) Yangon (Rangoon)","Asia/Bangkok"                   => "(GMT+07:00) Bangkok, Hanoi, Jakarta","Asia/Krasnoyarsk"               => "(GMT+07:00) Krasnoyarsk","Asia/Hong_Kong"                 => "(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi","Asia/Irkutsk"                   => "(GMT+08:00) Irkutsk, Ulaan Bataar","Australia/Perth"                => "(GMT+08:00) Perth","Australia/Eucla"                => "(GMT+08:45) Eucla","Asia/Tokyo"                     => "(GMT+09:00) Osaka, Sapporo, Tokyo","Asia/Seoul"                     => "(GMT+09:00) Seoul","Asia/Yakutsk"                   => "(GMT+09:00) Yakutsk","Australia/Adelaide"             => "(GMT+09:30) Adelaide","Australia/Darwin"               => "(GMT+09:30) Darwin","Australia/Brisbane"             => "(GMT+10:00) Brisbane","Australia/Hobart"               => "(GMT+10:00) Hobart","Asia/Vladivostok"               => "(GMT+10:00) Vladivostok","Australia/Lord_Howe"            => "(GMT+10:30) Lord Howe Island","Etc/GMT-11"                     => "(GMT+11:00) Solomon Is, New Caledonia","Asia/Magadan"                   => "(GMT+11:00) Magadan","Pacific/Norfolk"                => "(GMT+11:30) Norfolk Island","Asia/Anadyr"                    => "(GMT+12:00) Anadyr, Kamchatka","Pacific/Auckland"               => "(GMT+12:00) Auckland, Wellington","Etc/GMT-12"                     => "(GMT+12:00) Fiji, Kamchatka, Marshall Is","Pacific/Chatham"                => "(GMT+12:45) Chatham Islands","Pacific/Tongatapu"              => "(GMT+13:00) Nuku'alofa","Pacific/Kiritimati"             => "(GMT+14:00) Kiritimati");

2. 获取GMT标准时间

echo 'GMT :'.date("m/d/Y H:i", time() - date("Z"));

3. GMT to local time

下面的程序结合上面两条，将更加有用。

<?php// I am using the convention (assumption) of "07/04/2004 14:45"
$processdate = "12/04/2010 14:45"; //  date("m/d/Y H:i", time() - date("Z")) is GMT // gmttolocal is a function
// i am passing it 2 parameters:
// 1)the date in the above format and
// 2)time difference as a number; -5 in our case (GMT to CDT)
echo gmttolocal($processdate,-5); function gmttolocal($mydate,$mydifference)
{// trying to seperate date and time$datetime = explode(" ",$mydate);// trying to seperate different elements in a date$dateexplode = explode("/",$datetime[0]);// trying to seperate different elements in time$timeexplode = explode(":",$datetime[1]);// getting the unix datetime stamp$unixdatetime = mktime($timeexplode[0]+$mydifference,$timeexplode[1],0,$dateexplode[0],$dateexplode[1],$dateexplode[2]);// return the local datereturn date("m/d/Y H:i",$unixdatetime);
}

什么是GMT？

格林尼治标准时间（GMT）

由来

　　由于地球轨道并非圆形，其运行速度又随着地球与太阳的距离改变而出现变化，因此视太阳时欠缺均匀性。视太阳日的长度同时亦受到地球自转轴相对轨道面的倾斜度所影响。为着要纠正上述的不均匀性，天文学家计算地球非圆形轨迹与极轴倾斜对视太阳时的效应。平太阳时就是指经修订后的视太阳时。在格林尼治子午线上的平太阳时称为世界时(UT0)，又叫格林尼治平时(GMT)。

北京时间与GMT时间关系

　　GMT是中央时区,北京在东8区,相差8个小时所以北京时间=GMT时间+八小时　　Greenwich mean time 【天】格林尼治标准时间

拓展小链接

http://geolite.maxmind.com/download/geoip/database/

http://codeigniter.com/forums/viewthread/110099/

另外也可以参看： php获得可靠的精准的当前时间 ( 通过授时服务器 )