关注此问题here后，我使用了@Toland Hon的答案来生成时区列表。列表很大（我得到一个包含420个值的数组）。有没有办法将列表的大小减少到重要的时区？
以下是我从网站上获得的一个例子，
<option value="American Samoa">(GMT-11:00) American Samoa</option>
<option value="International Date Line West">(GMT-11:00) International Date Line West</option>
<option value="Midway Island">(GMT-11:00) Midway Island</option>
<option value="Hawaii">(GMT-10:00) Hawaii</option>
<option value="Alaska">(GMT-09:00) Alaska</option>
<option value="America/Los_Angeles">(GMT-08:00) America/Los_Angeles</option>
<option value="Pacific Time (US & Canada)">(GMT-08:00) Pacific Time (US & Canada)</option>
<option value="Tijuana">(GMT-08:00) Tijuana</option>
<option value="Arizona">(GMT-07:00) Arizona</option>
<option value="Chihuahua">(GMT-07:00) Chihuahua</option>
<option value="Mazatlan">(GMT-07:00) Mazatlan</option>
<option value="Mountain Time (US & Canada)">(GMT-07:00) Mountain Time (US & Canada)</option>
<option value="Central America">(GMT-06:00) Central America</option>
<option value="Central Time (US & Canada)">(GMT-06:00) Central Time (US & Canada)</option>
<option value="Guadalajara">(GMT-06:00) Guadalajara</option>
<option value="Mexico City">(GMT-06:00) Mexico City</option>
<option value="Monterrey">(GMT-06:00) Monterrey</option>
<option value="Saskatchewan">(GMT-06:00) Saskatchewan</option>
<option value="America/New_York">(GMT-05:00) America/New_York</option>
<option value="America/Toronto">(GMT-05:00) America/Toronto</option>
<option value="Bogota">(GMT-05:00) Bogota</option>
<option value="Eastern Time (US & Canada)">(GMT-05:00) Eastern Time (US & Canada)</option>
<option value="Indiana (East)">(GMT-05:00) Indiana (East)</option>
<option value="Lima">(GMT-05:00) Lima</option>
<option value="Quito">(GMT-05:00) Quito</option>
<option value="Atlantic Time (Canada)">(GMT-04:00) Atlantic Time (Canada)</option>
<option value="Caracas">(GMT-04:00) Caracas</option>
<option value="Georgetown">(GMT-04:00) Georgetown</option>
<option value="La Paz">(GMT-04:00) La Paz</option>
<option value="Santiago">(GMT-04:00) Santiago</option>
<option value="Newfoundland">(GMT-03:30) Newfoundland</option>
<option value="Brasilia">(GMT-03:00) Brasilia</option>
<option value="Buenos Aires">(GMT-03:00) Buenos Aires</option>
<option value="Greenland">(GMT-03:00) Greenland</option>
<option value="Montevideo">(GMT-03:00) Montevideo</option>
<option value="Mid-Atlantic">(GMT-02:00) Mid-Atlantic</option>
<option value="Azores">(GMT-01:00) Azores</option>
<option value="Cape Verde Is.">(GMT-01:00) Cape Verde Is.</option>
<option value="Casablanca">(GMT+00:00) Casablanca</option>
<option value="Dublin">(GMT+00:00) Dublin</option>
<option value="Edinburgh">(GMT+00:00) Edinburgh</option>
<option value="Europe/Lisbon">(GMT+00:00) Europe/Lisbon</option>
<option value="Europe/London">(GMT+00:00) Europe/London</option>
<option value="Lisbon">(GMT+00:00) Lisbon</option>
<option value="London">(GMT+00:00) London</option>
<option value="Monrovia">(GMT+00:00) Monrovia</option>
<option value="UTC">(GMT+00:00) UTC</option>
<option value="Amsterdam">(GMT+01:00) Amsterdam</option>
<option value="Belgrade">(GMT+01:00) Belgrade</option>
<option value="Berlin">(GMT+01:00) Berlin</option>
<option value="Bern">(GMT+01:00) Bern</option>
<option value="Bratislava">(GMT+01:00) Bratislava</option>
<option value="Brussels">(GMT+01:00) Brussels</option>
<option value="Budapest">(GMT+01:00) Budapest</option>
<option value="Copenhagen">(GMT+01:00) Copenhagen</option>
<option value="Ljubljana">(GMT+01:00) Ljubljana</option>
<option value="Madrid">(GMT+01:00) Madrid</option>
<option value="Paris">(GMT+01:00) Paris</option>
<option value="Prague">(GMT+01:00) Prague</option>
<option value="Rome">(GMT+01:00) Rome</option>
<option value="Sarajevo">(GMT+01:00) Sarajevo</option>
<option value="Skopje">(GMT+01:00) Skopje</option>
<option value="Stockholm">(GMT+01:00) Stockholm</option>
<option value="Vienna">(GMT+01:00) Vienna</option>
<option value="Warsaw">(GMT+01:00) Warsaw</option>
<option value="West Central Africa">(GMT+01:00) West Central Africa</option>
<option value="Zagreb">(GMT+01:00) Zagreb</option>
<option value="Athens">(GMT+02:00) Athens</option>
<option value="Bucharest">(GMT+02:00) Bucharest</option>
<option value="Cairo">(GMT+02:00) Cairo</option>
<option value="Harare">(GMT+02:00) Harare</option>
<option value="Helsinki">(GMT+02:00) Helsinki</option>
<option value="Jerusalem">(GMT+02:00) Jerusalem</option>
<option value="Kaliningrad">(GMT+02:00) Kaliningrad</option>
<option value="Kyiv">(GMT+02:00) Kyiv</option>
<option value="Pretoria">(GMT+02:00) Pretoria</option>
<option value="Riga">(GMT+02:00) Riga</option>
<option value="Sofia">(GMT+02:00) Sofia</option>
<option value="Tallinn">(GMT+02:00) Tallinn</option>
<option value="Vilnius">(GMT+02:00) Vilnius</option>
<option value="Baghdad">(GMT+03:00) Baghdad</option>
<option value="Istanbul">(GMT+03:00) Istanbul</option>
<option value="Kuwait">(GMT+03:00) Kuwait</option>
<option value="Minsk">(GMT+03:00) Minsk</option>
<option value="Moscow">(GMT+03:00) Moscow</option>
<option value="Nairobi">(GMT+03:00) Nairobi</option>
<option value="Riyadh">(GMT+03:00) Riyadh</option>
<option value="St. Petersburg">(GMT+03:00) St. Petersburg</option>
<option value="Volgograd">(GMT+03:00) Volgograd</option>
<option value="Tehran">(GMT+03:30) Tehran</option>
<option value="Abu Dhabi">(GMT+04:00) Abu Dhabi</option>
<option value="Baku">(GMT+04:00) Baku</option>
<option value="Muscat">(GMT+04:00) Muscat</option>
<option value="Samara">(GMT+04:00) Samara</option>
<option value="Tbilisi">(GMT+04:00) Tbilisi</option>
<option value="Yerevan">(GMT+04:00) Yerevan</option>
<option value="Kabul">(GMT+04:30) Kabul</option>
<option value="Ekaterinburg">(GMT+05:00) Ekaterinburg</option>
<option value="Islamabad">(GMT+05:00) Islamabad</option>
<option value="Karachi">(GMT+05:00) Karachi</option>
<option value="Tashkent">(GMT+05:00) Tashkent</option>
<option value="Chennai">(GMT+05:30) Chennai</option>
<option value="Kolkata">(GMT+05:30) Kolkata</option>
<option value="Mumbai">(GMT+05:30) Mumbai</option>
<option value="New Delhi">(GMT+05:30) New Delhi</option>
<option value="Sri Jayawardenepura">(GMT+05:30) Sri Jayawardenepura</option>
<option value="Kathmandu">(GMT+05:45) Kathmandu</option>
<option value="Almaty">(GMT+06:00) Almaty</option>
<option value="Astana">(GMT+06:00) Astana</option>
<option value="Dhaka">(GMT+06:00) Dhaka</option>
<option value="Urumqi">(GMT+06:00) Urumqi</option>
<option value="Rangoon">(GMT+06:30) Rangoon</option>
<option value="Bangkok">(GMT+07:00) Bangkok</option>
<option value="Hanoi">(GMT+07:00) Hanoi</option>
<option value="Jakarta">(GMT+07:00) Jakarta</option>
<option value="Krasnoyarsk">(GMT+07:00) Krasnoyarsk</option>
<option value="Novosibirsk">(GMT+07:00) Novosibirsk</option>
<option value="Beijing">(GMT+08:00) Beijing</option>
<option value="Chongqing">(GMT+08:00) Chongqing</option>
<option value="Hong Kong">(GMT+08:00) Hong Kong</option>
<option value="Irkutsk">(GMT+08:00) Irkutsk</option>
<option selected="selected" value="Kuala Lumpur">(GMT+08:00) Kuala Lumpur</option>
<option value="Perth">(GMT+08:00) Perth</option>
<option value="Singapore">(GMT+08:00) Singapore</option>
<option value="Taipei">(GMT+08:00) Taipei</option>
<option value="Ulaanbaatar">(GMT+08:00) Ulaanbaatar</option>
<option value="Osaka">(GMT+09:00) Osaka</option>
<option value="Sapporo">(GMT+09:00) Sapporo</option>
<option value="Seoul">(GMT+09:00) Seoul</option>
<option value="Tokyo">(GMT+09:00) Tokyo</option>
<option value="Yakutsk">(GMT+09:00) Yakutsk</option>
<option value="Adelaide">(GMT+09:30) Adelaide</option>
<option value="Darwin">(GMT+09:30) Darwin</option>
<option value="Brisbane">(GMT+10:00) Brisbane</option>
<option value="Canberra">(GMT+10:00) Canberra</option>
<option value="Guam">(GMT+10:00) Guam</option>
<option value="Hobart">(GMT+10:00) Hobart</option>
<option value="Melbourne">(GMT+10:00) Melbourne</option>
<option value="Port Moresby">(GMT+10:00) Port Moresby</option>
<option value="Sydney">(GMT+10:00) Sydney</option>
<option value="Vladivostok">(GMT+10:00) Vladivostok</option>
<option value="Magadan">(GMT+11:00) Magadan</option>
<option value="New Caledonia">(GMT+11:00) New Caledonia</option>
<option value="Solomon Is.">(GMT+11:00) Solomon Is.</option>
<option value="Srednekolymsk">(GMT+11:00) Srednekolymsk</option>
<option value="Auckland">(GMT+12:00) Auckland</option>
<option value="Fiji">(GMT+12:00) Fiji</option>
<option value="Kamchatka">(GMT+12:00) Kamchatka</option>
<option value="Marshall Is.">(GMT+12:00) Marshall Is.</option>
<option value="Wellington">(GMT+12:00) Wellington</option>
<option value="Chatham Is.">(GMT+12:45) Chatham Is.</option>
<option value="Nuku'alofa">(GMT+13:00) Nuku'alofa</option>
<option value="Samoa">(GMT+13:00) Samoa</option>
<option value="Tokelau Is.">(GMT+13:00) Tokelau Is.</option>
他们只列出了154个时区。从我在StackOverflow中读到的内容来看，使用静态列表并不好，所以我不打算制作静态列表。
如果我使用我需要的时区名称制作数组$timezoneList并且向用户显示下拉列表时，我可以使用{{1}生成具有偏移的正确数组，这是一个好主意吗？和$timezoneList？
答案 0 :(得分：0)
这是我的解决方案。我有一个硬编码数组，带有时区标识符和显示（用于前端使用），我用它来生成一个带有正确偏移显示的数组。
static function generateTimeZoneList()
{
static $timezone_list;
if(!isset($timezone_list) || empty($timezone_list))
{
$identifiers = self::getIdentifiers(); //get identifiers list
$temp_list = array();
foreach( $identifiers as $timezone => $display )
{
$tz = new DateTimeZone($timezone);
$temp_list[$timezone] = $tz->getOffset(new DateTime);
}
// sort timezone by offset
asort($temp_list);
foreach($temp_list as $timezone => $offset)
{
$offset_prefix = $offset < 0 ? '-' : '+';
$offset_formatted = gmdate( 'H:i', abs($offset) );
$pretty_offset = "GMT${offset_prefix}${offset_formatted}";
$display = $identifiers[$timezone];
$timezone_list[$timezone] = "($pretty_offset) $display";
}
}
return $timezone_list;
}
/**
* Format: identifier => display name
*/
static function getIdentifiers()
{
static $identifiers = array(
"Africa/Cairo" => " Cairo",
"Africa/Casablanca" => " Casablanca",
"Africa/Harare" => " Harare",
"Africa/Johannesburg" => " Pretoria",
"Africa/Lagos" => " West Central Africa",
"Africa/Monrovia" => " Monrovia",
"Africa/Nairobi" => " Nairobi",
"America/Argentina/Buenos_Aires" => " Buenos Aires",
"America/Argentina/Buenos_Aires" => " Georgetown",
"America/Bogota" => " Quito",
"America/Bogota" => " Bogota",
"America/Caracas" => " Caracas",
"America/Chihuahua" => " La Paz",
"America/Chihuahua" => " Chihuahua",
"America/Godthab" => " Greenland",
"America/La_Paz" => " La Paz",
"America/Lima" => " Lima",
"America/Los_Angeles" => " Pacific Time (US & Canada)",
"America/Managua" => " Central America",
"America/Mazatlan" => " Mazatlan",
"America/Mexico_City" => " Mexico City",
"America/Mexico_City" => " Guadalajara",
"America/Monterrey" => " Monterrey",
"America/Noronha" => " Mid-Atlantic",
"America/Santiago" => " Santiago",
"America/Sao_Paulo" => " Brasilia",
"America/Tijuana" => " Tijuana",
"Asia/Almaty" => " Almaty",
"Asia/Baghdad" => " Baghdad",
"Asia/Baku" => " Baku",
"Asia/Bangkok" => " Hanoi",
"Asia/Bangkok" => " Bangkok",
"Asia/Calcutta" => " Chennai",
"Asia/Calcutta" => " Mumbai",
"Asia/Calcutta" => " New Delhi",
"Asia/Calcutta" => " Sri Jayawardenepura",
"Asia/Chongqing" => " Chongqing",
"Asia/Dhaka" => " Dhaka",
"Asia/Dhaka" => " Astana",
"Asia/Hong_Kong" => " Beijing",
"Asia/Hong_Kong" => " Hong Kong",
"Asia/Irkutsk" => " Irkutsk",
"Asia/Jakarta" => " Jakarta",
"Asia/Jerusalem" => " Jerusalem",
"Asia/Kabul" => " Kabul",
"Asia/Kamchatka" => " Kamchatka",
"Asia/Karachi" => " Karachi",
"Asia/Karachi" => " Islamabad",
"Asia/Katmandu" => " Kathmandu",
"Asia/Kolkata" => " Kolkata",
"Asia/Krasnoyarsk" => " Krasnoyarsk",
"Asia/Kuala_Lumpur" => " Kuala Lumpur",
"Asia/Kuwait" => " Kuwait",
"Asia/Magadan" => " Solomon Is.",
"Asia/Magadan" => " Magadan",
"Asia/Magadan" => " New Caledonia",
"Asia/Muscat" => " Abu Dhabi",
"Asia/Muscat" => " Muscat",
"Asia/Novosibirsk" => " Novosibirsk",
"Asia/Rangoon" => " Rangoon",
"Asia/Riyadh" => " Riyadh",
"Asia/Seoul" => " Seoul",
"Asia/Singapore" => " Singapore",
"Asia/Taipei" => " Taipei",
"Asia/Tashkent" => " Tashkent",
"Asia/Tbilisi" => " Tbilisi",
"Asia/Tehran" => " Tehran",
"Asia/Tokyo" => " Osaka",
"Asia/Tokyo" => " Tokyo",
"Asia/Tokyo" => " Sapporo",
"Asia/Ulan_Bator" => " Ulaan Bataar",
"Asia/Urumqi" => " Urumqi",
"Asia/Vladivostok" => " Vladivostok",
"Asia/Yakutsk" => " Yakutsk",
"Asia/Yekaterinburg" => " Ekaterinburg",
"Asia/Yerevan" => " Yerevan",
"Atlantic/Azores" => " Azores",
"Atlantic/Cape_Verde" => " Cape Verde Is.",
"Australia/Adelaide" => " Adelaide",
"Australia/Brisbane" => " Brisbane",
"Australia/Canberra" => " Canberra",
"Australia/Darwin" => " Darwin",
"Australia/Hobart" => " Hobart",
"Australia/Melbourne" => " Melbourne",
"Australia/Perth" => " Perth",
"Australia/Sydney" => " Sydney",
"Canada/Atlantic" => " Atlantic Time (Canada)",
"Canada/Newfoundland" => " Newfoundland",
"Canada/Saskatchewan" => " Saskatchewan",
"Etc/Greenwich" => " Greenwich Mean Time : Dublin",
"Europe/Amsterdam" => " Amsterdam",
"Europe/Athens" => " Athens",
"Europe/Belgrade" => " Belgrade",
"Europe/Berlin" => " Berlin",
"Europe/Berlin" => " Bern",
"Europe/Bratislava" => " Bratislava",
"Europe/Brussels" => " Brussels",
"Europe/Bucharest" => " Bucharest",
"Europe/Budapest" => " Budapest",
"Europe/Copenhagen" => " Copenhagen",
"Europe/Helsinki" => " Helsinki",
"Europe/Helsinki" => " Kyiv",
"Europe/Istanbul" => " Istanbul",
"Europe/Lisbon" => " Lisbon",
"Europe/Ljubljana" => " Ljubljana",
"Europe/London" => " Edinburgh",
"Europe/London" => " London",
"Europe/Madrid" => " Madrid",
"Europe/Minsk" => " Minsk",
"Europe/Moscow" => " St. Petersburg",
"Europe/Moscow" => " Moscow",
"Europe/Paris" => " Paris",
"Europe/Prague" => " Prague",
"Europe/Riga" => " Riga",
"Europe/Rome" => " Rome",
"Europe/Sarajevo" => " Sarajevo",
"Europe/Skopje" => " Skopje",
"Europe/Sofia" => " Sofia",
"Europe/Stockholm" => " Stockholm",
"Europe/Tallinn" => " Tallinn",
"Europe/Vienna" => " Vienna",
"Europe/Vilnius" => " Vilnius",
"Europe/Volgograd" => " Volgograd",
"Europe/Warsaw" => " Warsaw",
"Europe/Zagreb" => " Zagreb",
"Pacific/Auckland" => " Wellington",
"Pacific/Auckland" => " Auckland",
"Pacific/Fiji" => " Fiji",
"Pacific/Fiji" => " Marshall Is.",
"Pacific/Guam" => " Guam",
"Pacific/Honolulu" => " Hawaii",
"Pacific/Kwajalein" => " International Date Line West",
"Pacific/Midway" => " Midway Island",
"Pacific/Port_Moresby" => " Port Moresby",
"Pacific/Samoa" => " Samoa",
"Pacific/Tongatapu" => " Nuku'alofa",
"US/Alaska" => " Alaska",
"US/Arizona" => " Arizona",
"US/Central" => " Central Time (US & Canada)",
"US/East-Indiana" => " Indiana (East)",
"US/Eastern" => " Eastern Time (US & Canada)",
"US/Mountain" => " Mountain Time (US & Canada)",
"UTC" => " UTC"
);
return $identifiers;
}
结果与此类似，
array (size=121)
'Pacific/Midway' => string '(GMT-11:00) Midway Island' (length=26)
'Pacific/Samoa' => string '(GMT-11:00) Samoa' (length=18)
'Pacific/Honolulu' => string '(GMT-10:00) Hawaii' (length=19)
'US/Alaska' => string '(GMT-08:00) Alaska' (length=19)
'America/Los_Angeles' => string '(GMT-07:00) Pacific Time (US & Canada)' (length=39)
'US/Arizona' => string '(GMT-07:00) Arizona' (length=20)
'America/Tijuana' => string '(GMT-07:00) Tijuana' (length=20)
'Canada/Saskatchewan' => string '(GMT-06:00) Saskatchewan' (length=25)
'America/Managua' => string '(GMT-06:00) Central America' (length=28)
'America/Mazatlan' => string '(GMT-06:00) Mazatlan' (length=21)
'America/Chihuahua' => string '(GMT-06:00) Chihuahua' (length=22)
'US/Mountain' => string '(GMT-06:00) Mountain Time (US & Canada)' (length=40)
'America/Lima' => string '(GMT-05:00) Lima' (length=17)