es_producer/app/service/ArticleSearchService.php

<?php
namespace App\Service;

use Hyperf\Elasticsearch\ClientBuilderFactory;
use Elasticsearch\ClientBuilder;

class ArticleSearchService
{
    protected $client;

    public function __construct(ClientBuilderFactory $clientBuilderFactory)
    {
        $this->client = $clientBuilderFactory->create();
    }

    public function searchArticles($query, $page = 1, $pageSize = 10)
    {
        $from = ($page - 1) * $pageSize;

        $params = [
            'index' => 'articles',
            'body' => [
                'from' => $from,
                'size' => $pageSize,
                'query' => [
                    'match' => [
                        'title' => $query,
                    ],
                ],
            ],
        ];

        $response = $this->client->search($params);
        return $response['hits']['hits'];
    }
}