gistfile1.php

<?php

class Search extends Controller {

    /**
     * @var Elasticsearch\Client
     */
    private $client;

    public function before() {
        $this->client = new Elasticsearch\Client();
    }

    public function index() {

        $data['query'] = $query = isset($_GET['search']) ? $_GET['search'] : '';

        if (!empty($this->route['params']['slug'])) {
            $last_query = ORM::for_table('last_queries')->where('slug', $this->route['params']['slug'])->find_one();
            if ($last_query) {
                $data['query'] = $query = $last_query->text;
            }
        }

        if (empty($query)) {
            $this->notfound404();
        }

        $data['page'] = $page = isset($_GET['page']) && is_numeric($_GET['page']) ? $_GET['page'] : 1;
        $data['limit'] = $limit = $this->config['frontend']['per_page'];
        $data['pages_count'] = 0;

        $es_query = ['match' =>
            [
                '_all' => [
                    'query' => $query,
                    'fuzziness' => 'AUTO',
                    'operator' => 'and',
                    'fuzzy_transpositions' => 'true',
                ],
            ],
        ];

        $es_filter = [];
        if (isset($_GET['show'])) {
            if ($_GET['show'] == 'hits') {
                $es_filter['term']['is_hit'] = true;
            }
            if ($_GET['show'] == 'discount') {
                $es_filter['term']['has_discount'] = true;
            }
        }

        $params = [
            'index' => $this->key_prefix.ModelSearch::ES_INDEX,
            'type' => ModelSearch::ES_TYPE,
            'size' => $limit,
            'from' => ($page-1)*$limit,
            'body' => [
                'query' => [
                    'filtered' => [
                        'query' => $es_query,
                        'filter' => $es_filter,
                    ],
                ],
            ],
        ];

        $params['body']['sort'] = [
            ['price' => ['order' => 'asc']],
        ];

        try {
            $product_results = $this->client->search($params);
        } catch (Exception $e) {}

        if (!empty($product_results['hits']['hits'])) {
            // Doing other stuff with results array
        }
    }
}