/**
  * Returns the number of results.
  *
  * @return integer The number of results.
  */
 function getNbResults()
 {
     $this->sphinx->SetLimits(1, 1, $this->options['max_results']);
     $results = $this->sphinx->searchEx($this->query, $this->options['entity']);
     return $results['total_found'];
 }