<?php
$timezone_id = $_GET["timezone_id"]; //"America/Toronto"
error_reporting(E_ALL ^ E_NOTICE);
ini_set("display_errors", 1);
date_default_timezone_set($timezone_id); //this is the only place Timezone ID is used
/* 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"; //"time1.google.com"; // "time.chu.nrc.ca"; //"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";
}
?>