(PHP Extension) 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.

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<?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();

// 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->put_NumCacheLevels(1);

// Tell the http object to fetch from the cache if possible.
$http->put_FetchFromCache(true);

// Also tell the http object to update the cache with newly fetched pages.
$http->put_UpdateCache(true);

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

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

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

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

?>