timezone_name_from_abbr不适用于php

Question

我在PHP工作。我想得到我的时区，亚洲/达卡，从偏移量6x60x60 = 21600。我试过用timezone_name_from_abbr("", 21600, false);，但它不起作用。我开始变假了。我现在能做什么？

Answer 1

官方文档提到了该函数中的一个错误：abbr

您可以编写一个函数来解析timezone_abbreviations_list()的结果：

/* Takes a GMT offset and returns a timezone name */
function tz_offset_to_name($offset, $dst)
{
    $results = array();
    
    $abbrarray = timezone_abbreviations_list();
    foreach ($abbrarray as $abbr)
    {
        foreach ($abbr as $city)
        {
             if ($city['offset'] == $offset and $city['dst'] == $dst)
             {
                 $results[] = $city['timezone_id'];
             }
        }
    }

    return $results;
}

它给出正确的结果：

$offset = 6*60*60 ;
$tz = timezone_name_from_abbr("", $offset, false);
var_dump($tz); // false

$tz = tz_offset_to_name($offset, false);
print_r($tz);

(
    [0] => Asia/Aqtobe
    [1] => Asia/Almaty
    [2] => Asia/Dacca
    [3] => Asia/Dhaka
    [4] => Asia/Thimbu
    [5] => Asia/Thimphu
    [6] => Asia/Dacca
    [7] => Asia/Dhaka
    [8] => Asia/Dushanbe
    [9] => Asia/Bishkek
    [10] => Asia/Hovd
    [11] => Indian/Chagos
    [12] => Asia/Bishkek
    [13] => Asia/Qyzylorda
    [14] => Asia/Krasnoyarsk
    [15] => Asia/Novokuznetsk
    [16] => Asia/Colombo
    [17] => Antarctica/Mawson
    [18] => Asia/Novosibirsk
    [19] => Asia/Novokuznetsk
    [20] => Asia/Omsk
    [21] => Asia/Qyzylorda
    [22] => Asia/Aqtau
    [23] => Asia/Samarkand
    [24] => Asia/Tashkent
    [25] => Asia/Oral
    [26] => Antarctica/Vostok
    [27] => Asia/Kashgar
    [28] => Asia/Urumqi
    [29] => Asia/Yekaterinburg
    [30] => 
)