PHP如何从国家代码和地区返回时区

function getTimezoneFromCountryAndRegion($countryCode, $region) {
    $timezones = timezone_identifiers_list();
    
    foreach ($timezones as $timezone) {
        $timezoneData = explode('/', $timezone);
        
        if ($timezoneData[0] == $countryCode && $timezoneData[1] == $region) {
            return $timezone;
        }
    }
    
    return false;
}

$countryCode = 'US';
$region = 'New_York';

$timezone = getTimezoneFromCountryAndRegion($countryCode, $region);

if ($timezone) {
    echo "The timezone for $countryCode/$region is $timezone.";
} else {
    echo "No timezone found for $countryCode/$region.";
}