What are the best practices for caching API responses in PHP applications?

Caching API responses in PHP applications can help improve performance by reducing the number of requests made to the API server. One common approach is to store the API response in a cache (such as Redis or Memcached) with a unique key based on the request parameters. Before making a request to the API, check if the response is already cached, and if so, return the cached data instead.

// Check if the response is cached
$cacheKey = 'api_response_' . md5($apiEndpoint . serialize($params));
$cachedResponse = $cache->get($cacheKey);

// If cached response exists, return it
if ($cachedResponse) {
    return $cachedResponse;
}

// Make request to API
$response = makeApiRequest($apiEndpoint, $params);

// Store response in cache
$cache->set($cacheKey, $response, $cacheTTL);

return $response;