php - 如何获取Windows的服务器时区？

how to get the server timezone on a windows server with PHP?

for linux:

$systemTimeZone = system('date +%Z');

*nix system:

$systemTimeZone = popen("date +%Z");

windows:

$systemTimeZone = ???

greez & thx, sky...

EDIT: i know about the php function like:

date_default_timezone_get()
date('T')
\DateTime::timezone

but all of this build-in function from PHP are referenz to the setting in the php.ini. i want to know the real used timezone from the OS.

i have try to use the windows command-line tool

systeminfo

but this is to slow for call and parsing. another command line tool i have testet is:

tzutil /g

this is not the timezone format what i want, in my case i get this:

$:> tzutil /g
W. Europe Standard Time

any other ideas for me ?

What about the built-in function?

http://php.net/manual/en/function.date-default-timezone-get.php

This will tell you the servers timezone abbreviation:

$systemTimeZone = date("T");
echo $systemTimeZone;

E.g. EST, MDT ...

I had just now the same error, and found no better solution then using a selfmade mapping. For windows I used this:

// this array can be filled up with whatever you need
$timezones = array(
      'GMT' => 'Europe/London'
    , '0' => 'Europe/London'
    , '1' => 'Europe/London'
    , 'GMT Standard Time' => 'Europe/London'
    , '2' => 'Europe/Berlin'
    , 'W. Europe Standard Time' => 'Europe/Berlin'
);

// getting the timezone    
$timezone = exec('tzutil /g');

// and setting it accordingly
if( array_key_exists($timezone, $timezones)) {      
    echo("> timezone identified as " . $timezones[$timezone] . "
");
    date_default_timezone_set($timezones[$timezone]);
} else {
    die("Unknown Timezone: " . $timezone);
}