(PHP ActiveX) Get Current Date/Time from NIST Time Server

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).

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Socket')
$socket = new COM("Chilkat.Socket");

// Connect to an NIST time server and read the current date/time
$maxWaitMs = 4000;
$useTls = 0;
$success = $socket->Connect('time-c.nist.gov',37,$useTls,$maxWaitMs);
if ($success != 1) {
    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
// 1 or 0 to indicate success.  If successful, the integer
// is obtained via the ReceivedInt property.
$bigEndian = 1;
$success = $socket->ReceiveInt32($bigEndian);
if ($success != 1) {
    print $socket->LastErrorText . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.CkDateTime')
$dt = new COM("Chilkat.CkDateTime");
$dt->SetFromNtpTime($socket->ReceivedInt);

// Show the current local date/time
$bLocalTime = 1;
print 'Current local date/time: ' . $dt->getAsRfc822($bLocalTime) . "\n";

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

?>