验证来自不同网站的时区“名称”？-Validatingtimezone'name'cominginfromdifferentsite?

i've got users coming in from a different site and i'm getting that site to send across their timezone in a standard 'tz' format

我有来自不同网站的用户,我正在以标准的“tz”格式将该网站发送到他们的时区

 Antarctica/Casey    Antarctica/Davis   
 Antarctica/DumontDUrville  Antarctica/Macquarie 
 Antarctica/Mawson  Antarctica/McMurdo

How do i verify that this 'string' coming in is a VALID timezone entry?

如何验证此'字符串'是否为VALID时区条目?

this is what i'm doing

这就是我正在做的事情

        $script_tz = date_default_timezone_get();
        if(!date_default_timezone_set($specifiedTimeZone))
        {
            date_default_timezone_set($script_tz);
            $errormessage = "Invalid TimeZone";
            return;         
        }
        date_default_timezone_set($script_tz);

but i dont like it - seems kludgy.

但我不喜欢它 - 似乎kludgy。

testing it out:

测试出来:

Test1

$test1 = 'America/New_York';
$test2 = 'junk';

$start = microtime(true);
for($i=1;$i<10000;$i++)
{
    if (in_array($test1, DateTimeZone::listIdentifiers())) {}else {}
    if (in_array($test2, DateTimeZone::listIdentifiers())) {}else {}
}

$end = microtime(true);

echo $end-$start;
?>

9.7208099365234

Test2

0.25762510299683

5 个解决方案

if (in_array($timezone, DateTimeZone::listIdentifiers())) {
    echo "valid";
}
else {
    echo "invalid";
}