/**
* Calculate and set default time zone
*
* @access public
* @static
* @return time zone string
*/
public static function _getDefaultTimeZone()
{
if (strlen(self::$default_timezone)) {
return self::$default_timezone;
}
// PHP >= 5.2.0
if (function_exists('date_default_timezone_get') and $tz = date_default_timezone_get()) {
return self::$default_timezone = $tz;
}
// PHP ini option (PHP >= 5.1.0)
if ($tz = ini_get('date.timezone')) {
return self::$default_timezone = $tz;
}
// is $_ENV['PHP_TZ'] set ?
if ($tz = getenv('PHP_TZ')) {
return self::$default_timezone = $tz;
}
// is $_ENV['TZ'] set ?
if ($tz = getenv('TZ')) {
return self::$default_timezone = $tz;
}
if (strlen($tz = date('T'))) {
return self::$default_timezone = $tz;
}
return self::$default_timezone = self::UTC;
}
