title: How to delete all the cache using predis in php
body: <p>I am using predis library to cache the data. I am able to delete the cache individually using </p>
  
  <blockquote>
    <p>$redis->cache->hdel(self::$cacheNamespace, $key);</p>
  </blockquote>
  
  <p>But i need to delete all the cache without providing any keys, Is there a way to achieve that in predis.</p>