protected function cacheKey($type, $params)
    {
        return sprintf('%s:%s:%s', $this->cachePrefix, $type, md5(http_build_query($params)));
    }
protected function cacheKey($type, $params)
    {
        return sprintf('%s:%s:%s', $this->cachePrefix, $type, md5(http_build_query($params)));
    }
protected function cacheKey ( $ type , $ params ) { return sprintf ( '%s:%s:%s' , $ this -> cachePrefix , $ type , md5 ( http_build_query ( $ params ) ) ) ; }
get a cache key for the given type and params.

@param string $term
@param array  $params

@return string
get a cache key for the given type and params .