DocsController.php

<?php

public function processResults($res, $request)
{
    $data = ['hits' => [], 'nbHits' => count($res)];

    foreach ($res as $result) {
        $file = file_get_contents($result['path']);
        $crawler = new Crawler;
        $crawler->addHtmlContent($file);
        $title = $crawler->filter('h1')->text();

        $relevant = $this->tnt->snippet($request->get('query'), strip_tags($file));

        $data['hits'][] = [
            'link' => basename($result['path']),
            '_highlightResult' => [
                'h1' => [
                    'value' => $this->tnt->highlight($title, $request->get('query')),
                ],
                'content' => [
                    'value' => $this->tnt->highlight($relevant, $request->get('query')),
                ]
            ]
        ];
    }

    return response()->json($data);
}