SysInfo.php
public static function getHostId()
    {
        if (self::isWindows()) {
            $uuid = explode("\r\n", trim(shell_exec('wmic csproduct get UUID')));

            return (\count($uuid) === 2 ? $uuid[1] : false);
        }

        $uuid = trim(shell_exec('hostid'));

        return $uuid === null ? false : $uuid;
    }
public static function getHostId()
    {
        if (self::isWindows()) {
            $uuid = explode("\r\n", trim(shell_exec('wmic csproduct get UUID')));

            return (\count($uuid) === 2 ? $uuid[1] : false);
        }

        $uuid = trim(shell_exec('hostid'));

        return $uuid === null ? false : $uuid;
    }
Get unique system ID

@return string System ID
@static