send";
foreach($packet as $key => $value) $str .= "| " . $key . " | " . bin2hex($value) . " |
";
$str .= print "";
return($str);
}
/*-------------------------------------------------------------------------------------------------
NTPクライアント
-------------------------------------------------------------------------------------------------*/
function NTP_client($server, $port, $timeout = 30){
/* NTPパケット */
$ntp["control_word"] = chr(hexdec("0b")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["root_delay"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["root_dispersion"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["ref_identifier"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["ref_time_sec"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["ref_time_frac"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["org_time_sec"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["org_time_frac"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["recv_time_sec"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["recv_time_frac"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["send_time_sec"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
$ntp["send_time_frac"] = chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00")) . chr(hexdec("00"));
/* NTPサーバに接続 */
if( !($sock = fsockopen($server, $port, $err_no, $err_str, $timeout)) ){
return(0);
}
/* パケットを送る */
unset($tmp);
foreach($ntp as $key => $value) $tmp .= $value;
fwrite($sock, $tmp, 4 * 12);
/* 応答を得る */
foreach($ntp as $key => $value){
$value = fread($sock, 4);
$ntp[ $key ] = $value;
}
fclose($sock);
return(date("Y/n/j/G/i/s", hexdec(bin2hex($ntp["send_time_sec"])) - 2208988800));
}
?>