Create timetool.php

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Namhyeon Go 2018-09-26 19:22:10 +09:00 committed by GitHub
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<?php
/**
* @file timetool.php
* @date 2018-09-26
* @author Go Namhyeon <gnh1201@gmail.com>
* @brief Time tools
*/
/* Query a time server (C) 1999-09-29, Ralf D. Kloth (QRQ.software) <ralf at qrq.de> */
if(!function_exists("query_time_server")) {
function query_time_server($timeserver, $socket) {
// parameters: server, socket, error code, error text, timeout
$fp = fsockopen($timeserver,$socket,$err,$errstr,5);
if($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 $ret;
}
}
if(!function_exists("get_server_time")) {
function get_server_time($timeserver="time.bora.net", $dateformat="Y-m-d h:i:s") {
$datetime = false;
$timercvd = query_time_server($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";
$datetime = date($dateformat, $tmestamp);
} else {
//echo "Unfortunately, the time server $timeserver could not be reached at this time. ";
//echo "$timercvd[1] $timercvd[2].<br>\n";
set_error($timercvd[1] . " " . $timercvd[2]);
show_errors();
}
return $datetime;
}
}