(PHP Extension) 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).

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$http = new CkHttp();

// resp is a CkHttpResponse
$resp = $http->GetHead('https://www.chilkatsoft.com/hamlet.xml');
if ($http->get_LastMethodSuccess() == false) {
    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->get_LastMethodSuccess() == true) {
    // Parse the RFC822 format date/time string
    $ckdt = new CkDateTime();
    $ckdt->SetFromRfc822($lastModStr);

    // If we want to access individual date/time parts (in the local timezone)
    // dt is a CkDtObj
    $dt = $ckdt->GetDtObj(true);
    print 'day/month/year = ' . $dt->get_Day() . '/' . $dt->get_Month() . '/' . $dt->get_Year() . "\n";

}


?>