如何使用Elasticsearch和PHP构建高性能的新闻推荐系统

PUT /news_index
{
  "mappings": {
    "news": {
      "properties": {
        "title": {
          "type": "text"
        },
        "content": {
          "type": "text"
        },
        "date": {
          "type": "date"
        },
        "category": {
          "type": "keyword"
        },
        "keywords": {
          "type": "keyword"
        }
      }
    }
  }
}

require 'vendor/autoload.php';

$client = ElasticsearchClientBuilder::create()->build();

$newsData = [
  [
    'title' => '新闻标题1',
    'content' => '新闻内容1',
    'date' => '2021-01-01',
    'category' => '科技',
    'keywords' => ['人工智能', '机器学习']
  ],
  // 更多新闻数据...
];

$params = [];
foreach ($newsData as $news) {
  $params['body'][] = [
    'index' => [
      '_index' => 'news_index',
      '_type' => 'news'
    ]
  ];
  $params['body'][] = $news;
}

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

$params = [
  'index' => 'news_index',
  'body' => [
    'query' => [
      'bool' => [
        'should' => [
          ['match' => ['keywords' => '人工智能']],
          ['match' => ['category' => '科技']]
        ]
      ]
    ]
  ]
];

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

foreach ($response['hits']['hits'] as $hit) {
  // 处理每条搜索结果
}