如何利用Elasticsearch和PHP进行音乐搜索和推荐

# 安装Elasticsearch
$ wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-{version}.tar.gz
$ tar -xvf elasticsearch-{version}.tar.gz
$ cd elasticsearch-{version}/bin
$ ./elasticsearch

# 创建索引和映射
$ curl -XPUT 'http://localhost:9200/music' -H 'Content-Type: application/json' -d '
{
  "mappings": {
    "properties": {
      "title": { "type": "text" },
      "artist": { "type": "text" },
      "genre": { "type": "keyword" }
    }
  }
}
'

require 'vendor/autoload.php';

$hosts = ['localhost:9200'];
$client = ElasticsearchClientBuilder::create()->setHosts($hosts)->build();

// 导入音乐数据
$music1 = [
  'title' => 'Song 1',
  'artist' => 'Artist 1',
  'genre' => 'Pop'
];

$music2 = [
  'title' => 'Song 2',
  'artist' => 'Artist 2',
  'genre' => 'Rock'
];

$params = [
  'index' => 'music',
  'id' => 1,
  'body' => $music1
];

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

$params = [
  'index' => 'music',
  'id' => 2,
  'body' => $music2
];

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

// 执行搜索
$params = [
  'index' => 'music',
  'body' => [
    'query' => [
      'match' => [
        'title' => 'song'
      ]
    ]
  ]
];

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

// 处理搜索结果
foreach ($response['hits']['hits'] as $hit) {
  $music = $hit['_source'];
  echo 'Title: ' . $music['title'] . ', Artist: ' . $music['artist'] . ', Genre: ' . $music['genre'];
  echo "
";
}

// 执行推荐查询
$params = [
  'index' => 'music',
  'body' => [
    'query' => [
      'more_like_this' => [
        'fields' => ['title', 'artist'],
        'like' => [
          '_index' => 'music',
          '_id' => 1
        ]
      ]
    ]
  ]
];

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

// 处理推荐结果
foreach ($response['hits']['hits'] as $hit) {
  $music = $hit['_source'];
  echo 'Title: ' . $music['title'] . ', Artist: ' . $music['artist'] . ', Genre: ' . $music['genre'];
  echo "
";
}