PHP

Fetch Web Pages from Local Cache

See more HTTP Examples

Demonstrates how to keep a local cache to avoid re-fetching web pages. Chilkat2 PHP

<?php

use Chilkat2\Http;

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

$http = new Http();

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

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

// This HTTP GET should result in a cache file getting created.
try {
    $html = $http->QuickGetStr('https://www.google.com/');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// The 1st GET was not from cache:
echo 'Fetched from cache: ', ($http->LastFromCache ? 'true' : 'false'), "\n";

// Fetching again will cause the page to be delivered from our local cache.
try {
    $html = $http->QuickGetStr('https://www.google.com/');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// The 2nd GET is from cache:
echo 'Fetched from cache: ', ($http->LastFromCache ? 'true' : 'false'), "\n";