PHP 콘텐츠 캐싱 및 최적화 전략

$cacheKey = 'my_query_results';
$cachedResults = apc_fetch($cacheKey);

if ($cachedResults) {
    echo 'Using cached results...';
} else {
    // Execute MySQL query and store results in memory
    $cachedResults = executeMySQLQuery();
    apc_store($cacheKey, $cachedResults, 3600);
    echo 'Query results cached for 1 hour...';
}

$cacheFileName = 'post-' . $postId . '.cache';
$cachedContent = file_get_contents($cacheFileName);

if ($cachedContent) {
    echo 'Using cached content...';
} else {
    // Fetch post content from database
    $cachedContent = get_the_content();
    file_put_contents($cacheFileName, $cachedContent);
    echo 'Content cached to file system...';
}

// Create Redis connection
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

// Get cart items from Redis
$cart = $redis->get('cart-' . $userId);

// If cart is not cached, fetch it from database
if (!$cart) {
    $cart = getCartFromDatabase();
    $redis->set('cart-' . $userId, $cart);
    echo 'Cart data cached in Redis...';
}

ob_start();
// Generate page content
include('page-template.php');
$cachedContent = ob_get_clean();

// Write cached content to file
file_put_contents('page-' . $pageName . '.html', $cachedContent);
echo 'Page cached as HTML file...';