youhk_test_repository/app/Foundation/ElasticsearchClient.php

<?php

namespace App\Foundation;

use Elasticsearch\Client;
use Elasticsearch\ClientBuilder;

class ElasticsearchClient
{
    protected $hosts = [];

    public function __construct(array $hosts)
    {
        $this->hosts = $hosts;
    }

    public function client(): Client
    {
        return ClientBuilder::create()->setHosts($this->hosts)
            ->build();
    }
}