/**
  * 缓存实例
  */
 public function actionCache()
 {
     $key = "product_page";
     //$InstanceCache = new Cache();
     $CachedString = Cache::get($key);
     if (is_null($CachedString)) {
         $CachedString = "Files Cache --> Well done !";
         // Write products to Cache in 10 minutes with same keyword
         Cache::set($key, $CachedString, 600);
         echo "FIRST LOAD // WROTE OBJECT TO CACHE // RELOAD THE PAGE AND SEE // ";
         echo $CachedString;
     } else {
         echo "READ FROM CACHE // ";
         echo $CachedString;
     }
     echo '<br /><br /><a href="/">Back to index</a>';
 }