PHP 中使用 Elasticsearch 实现分布式搜索引擎

<?php
require 'vendor/autoload.php';

// 设置Elasticsearch的连接信息
$hosts = [
    [
        'host' => 'localhost',
        'port' => 9200,
        'scheme' => 'http',
        'user' => 'username', // 可选的用户名
        'pass' => 'password' // 可选的密码
    ]
];

// 创建Elasticsearch客户端
$client = ElasticsearchClientBuilder::create()
            ->setHosts($hosts)
            ->build();

// 创建索引（博客文章）
$params = [
    'index' => 'blog',
    'body' => [
        'settings' => [
            'number_of_shards' => 2, // 分片数
            'number_of_replicas' => 1 // 副本数
        ],
        'mappings' => [
            'properties' => [
                'title' => [
                    'type' => 'text',
                    'analyzer' => 'standard'
                ],
                'content' => [
                    'type' => 'text',
                    'analyzer' => 'standard'
                ],
                'tags' => [
                    'type' => 'keyword'
                ]
            ]
        ]
    ]
];

$response = $client->indices()->create($params);

// 添加文档（博客文章）
$params = [
    'index' => 'blog',
    'id' => 1,
    'body' => [
        'title' => 'PHP入门教程',
        'content' => '这是一篇PHP入门教程的示例文章。',
        'tags' => ['PHP', '教程']
    ]
];

$response = $client->index($params);

// 搜索文档（博客文章）
$params = [
    'index' => 'blog',
    'body' => [
        'query' => [
            'match' => [
                'content' => 'PHP'
            ]
        ],
        'sort' => [
            '_score' => 'desc'
        ]
    ]
];

$response = $client->search($params);

// 解析搜索结果
foreach ($response['hits']['hits'] as $hit) {
    $source = $hit['_source'];
    echo '文章标题：' . $source['title'] . '<br>';
    echo '文章内容：' . $source['content'] . '<br>';
    echo '相关标签：' . implode(', ', $source['tags']) . '<br>';
    echo '<hr>';
}
?>