(PHP ActiveX) Get the Last-Modified Date Before HTTP Download

Demonstrates how to send a HEAD request to get the last-modified date of a file on a web server (without downloading the file).

Note: This example requires Chilkat v11.0.0 or greater.

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

$success = 0;

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

$http = new COM("Chilkat.Http");

$resp = new COM("Chilkat.HttpResponse");
$success = $http->HttpNoBody('HEAD','https://www.chilkatsoft.com/hamlet.xml',$resp);
if ($success == 0) {
    print $http->LastErrorText . "\n";
    exit;
}

// Examine the response header.
print $resp->Header . "\n";

// Here is a sample response header:

// 	Content-Length: 279658
// 	Content-Type: text/xml
// 	Last-Modified: Thu, 12 May 2016 15:14:08 GMT
// 	Accept-Ranges: bytes
// 	ETag: "c1cd8bee60acd11:0"
// 	Server: Microsoft-IIS/8.5
// 	X-Powered-By: ASP.NET
// 	X-Powered-By-Plesk: PleskWin
// 	Date: Thu, 25 Jul 2019 16:40:54 GMT

// Get the Last-Modified header.
$lastModStr = $resp->getHeaderField('Last-Modified');
// If the header exists...
if ($resp->LastMethodSuccess == 1) {
    // Parse the RFC822 format date/time string
    $ckdt = new COM("Chilkat.CkDateTime");
    $ckdt->SetFromRfc822($lastModStr);

    // If we want to access individual date/time parts (in the local timezone)
    $dt = new COM("Chilkat.DtObj");
    $ckdt->ToDtObj(1,$dt);

    print 'day/month/year = ' . $dt->Day . '/' . $dt->Month . '/' . $dt->Year . "\n";
}


?>