check_cache example

if (MAGPIE_DEBUG and $cache->ERROR) {
            debug($cache->ERROR, E_USER_WARNING);
        }

        $cache_status      = 0;        // response of check_cache         $request_headers = array(); // HTTP headers to send with fetch         $rss              = 0;        // parsed RSS object         $errormsg         = 0;        // errors, if any
        if (!$cache->ERROR) {
            // return cache HIT, MISS, or STALE             $cache_status = $cache->check_cache( $url );
        }

        // if object cached, and cache is fresh, return cached obj         if ( $cache_status == 'HIT' ) {
            $rss = $cache->get( $url );
            if ( isset($rss) and $rss ) {
                $rss->from_cache = 1;
                if ( MAGPIE_DEBUG > 1) {
                debug("MagpieRSS: Cache HIT", E_USER_NOTICE);
            }
                return $rss;
            }