Elastica\Response::getData PHP Method

    public function getData()
    {
        if ($this->_response == null) {
            $response = $this->_responseString;
            if ($response === false) {
                $this->_error = true;
            } else {
                try {
                    if ($this->getJsonBigintConversion()) {
                        $response = JSON::parse($response, true, 512, JSON_BIGINT_AS_STRING);
                    } else {
                        $response = JSON::parse($response);
                    }
                } catch (JSONParseException $e) {
                    // leave response as is if parse fails
                }
            }
            if (empty($response)) {
                $response = [];
            }
            if (is_string($response)) {
                $response = ['message' => $response];
            }
            $this->_response = $response;
        }
        return $this->_response;
    }

 /**
  * Builds individual result objects.
  *
  * @param Response $response
  *
  * @return Result[]
  */
 private function buildResults(Response $response)
 {
     $data = $response->getData();
     $results = [];
     if (!isset($data['hits']['hits'])) {
         return $results;
     }
     foreach ($data['hits']['hits'] as $hit) {
         $results[] = new Result($hit);
     }
     return $results;
 }