PHP와 Elasticsearch로 구현된 실시간 이미지 검색 솔루션

<?php

require 'vendor/autoload.php';

use ElasticsearchClientBuilder;

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

// 创建索引
$params = [
    'index' => 'images',
    'body' => [
                'mappings' => [
                    'properties' => [
                        'image' => [
                            'type' => 'binary'
                        ],
                        'features' => [
                            'type' => 'dense_vector',
                            'dims' => 128
                        ]
                    ]
                ]
             ]
];

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

// 添加图像及特征向量到索引中
$params = [
    'index' => 'images',
    'id' => '1',
    'body' => [
        'image' => base64_encode(file_get_contents('image.jpg')),
        'features' => [0.12, 0.56, 0.78, ...] // 特征向量示例
    ]
];

$client->index($params);

// 执行图像检索
$params = [
    'index' => 'images',
    'body' => [
        'query' => [
            'script_score' => [
                'query' => [
                    'match_all' => []
                ],
                'script' => [
                    'source' => 'cosineSimilarity(params.queryVector, doc['features']) + 1.0',
                    'params' => [
                        'queryVector' => [0.34, 0.78, 0.91, ...] // 查询图像的特征向量示例
                    ]
                ]
            ]
        ]
    ]
];

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

// 处理搜索结果
foreach ($response['hits']['hits'] as $hit) {
    $id = $hit['_id'];
    $score = $hit['_score'];
    $image = base64_decode($hit['_source']['image']);
    // 显示图像及相关信息
    echo "<img src='data:image/jpeg;base64," . $image . "' />";
    echo "相似度得分: " . $score;
}

?>