PHP Extension

Get Current Date/Time from NIST Time Server

See more Socket/SSL/TLS Examples

Demonstrates using Chilkat Socket to connect to an NIST time server and (using the old Time Protocol (RFC 868)), will read the current GMT time.

Note: This is not necessarily the very best means for getting the current date/time. The most commonly used time protocol is the Network Time Protocol (RFC-1305).

PHP Extension

<?php

include("chilkat.php");

$success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$socket = new CkSocket();

// Connect to an NIST time server and read the current date/time
$maxWaitMs = 4000;
$useTls = false;
$success = $socket->Connect('time-c.nist.gov',37,$useTls,$maxWaitMs);
if ($success != true) {
    print $socket->lastErrorText() . "\n";
    exit;
}

// The time server will send a big-endian 32-bit integer representing
// the number of seconds since since 00:00 (midnight) 1 January 1900 GMT.
// The ReceiveInt32 method will receive a 4-byte integer, but returns
// true or false to indicate success.  If successful, the integer
// is obtained via the ReceivedInt property.
$bigEndian = true;
$success = $socket->ReceiveInt32($bigEndian);
if ($success != true) {
    print $socket->lastErrorText() . "\n";
    exit;
}

$dt = new CkDateTime();
$dt->SetFromNtpTime($socket->get_ReceivedInt());

// Show the current local date/time
$bLocalTime = true;
print 'Current local date/time: ' . $dt->getAsRfc822($bLocalTime) . "\n";

$maxWaitMs = 10;
$socket->Close($maxWaitMs);

?>