(PHP ActiveX) Fetch Web Pages from Local Cache

Demonstrates how to keep a local cache to avoid re-fetching web pages.

Note: This example requires Chilkat v9.5.0.91 or later.

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

// Define a cache directory and set the number of levels based on the anticipated size of the cache.
$http->AddCacheRoot('c:/AAWorkarea/httpCache/');

// up to 256 sub-directories under the cache root will be created as needed to hold cached GET's.
$http->NumCacheLevels = 1;

// Tell the http object to fetch from the cache if possible.
$http->FetchFromCache = 1;

// Also tell the http object to update the cache with newly fetched pages.
$http->UpdateCache = 1;

// This HTTP GET should result in a cache file getting created.
$html = $http->quickGetStr('https://www.google.com/');
if ($http->LastMethodSuccess == 0) {
    print $http->LastErrorText . "\n";
    exit;
}

// The 1st GET was not from cache:
print 'Fetched from cache: ' . $http->LastFromCache . "\n";

// Fetching again will cause the page to be delivered from our local cache.
$html = $http->quickGetStr('https://www.google.com/');
if ($http->LastMethodSuccess == 0) {
    print $http->LastErrorText . "\n";
    exit;
}

// The 2nd GET is from cache:
print 'Fetched from cache: ' . $http->LastFromCache . "\n";

?>