通过PHP从NTP服务器检索时间

我的虚拟机(VMWare / Ubuntu)出现了时间同步问题.我们认为最好的办法是直接从NTP服务器获取时间,所以我开始研究一个脚本来做到这一点,但到目前为止没有任何作用,这就是为什么我决定来这里看看是否有人能指出我的权利方向.

为了澄清,我正在寻找一种通过PHP连接到时间服务器的方法来直接检索时间并在我需要生成的时间戳上重复使用它而不是同步服务器.

这是一个完整的工作代码：

<?PHP
error_reporting(E_ALL ^ E_NOTICE);
ini_set("display_errors",1);

date_default_timezone_set("America/Argentina/Buenos_Aires");

/* Query a time server (C) 1999-09-29,Ralf D. Kloth (QRQ.software) <ralf at qrq.de> */
function query_time_server ($timeserver,$socket)
{
    $fp = fsockopen($timeserver,$socket,$err,$errstr,5);
        # parameters: server,socket,error code,error text,timeout
    if($fp)
    {
        fputs($fp,"\n");
        $timevalue = fread($fp,49);
        fclose($fp); # close the connection
    }
    else
    {
        $timevalue = " ";
    }

    $ret = array();
    $ret[] = $timevalue;
    $ret[] = $err;     # error code
    $ret[] = $errstr;  # error text
    return($ret);
} # function query_time_server


$timeserver = "ntp.pads.ufrj.br";
$timercvd = query_time_server($timeserver,37);

//if no error from query_time_server
if(!$timercvd[1])
{
    $timevalue = bin2hex($timercvd[0]);
    $timevalue = abs(HexDec('7fffffff') - HexDec($timevalue) - HexDec('7fffffff'));
    $tmestamp = $timevalue - 2208988800; # convert to UNIX epoch time stamp
    $datum = date("Y-m-d (D) H:i:s",$tmestamp - date("Z",$tmestamp)); /* incl time zone offset */
    $doy = (date("z",$tmestamp)+1);

    echo "Time check from time server ",$timeserver," : [<font color=\"red\">",$timevalue,"</font>]";
    echo " (seconds since 1900-01-01 00:00.00).<br>\n";
    echo "The current date and universal time is ",$datum," UTC. ";
    echo "It is day ",$doy," of this year.<br>\n";
    echo "The unix epoch time stamp is $tmestamp.<br>\n";


    echo date("d/m/Y H:i:s",$tmestamp);
}
else
{
    echo "Unfortunately,the time server $timeserver Could not be reached at this time. ";
    echo "$timercvd[1] $timercvd[2].<br>\n";
}
?>

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