PHP中如何利用ElasticSearch进行数据查询和全文搜索？（如何在PHP中集成ElasticSearch进行数据检索和全文搜索？）

利用 PHP 集成 Elasticsearch 进行数据查询和全文搜索

概况 Elasticsearch 是一款开源的分布式搜索和分析引擎，广泛用于存储和搜索大数据集。PHP 作为一种流行的 Web 编程语言，可以通过 Elasticsearch PHP 客户端库与 Elasticsearch 集成，从而实现高效的数据查询和全文搜索。

安装 Elasticsearch PHP 客户端库

composer require elasticsearch/elasticsearch

建立 Elasticsearch 连接

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

数据查询 按 ID 查询

$params = [
    "index" => "my_index",
    "id" => "my_id"
];
$result = $client->get($params);

筛选查询

$params = [
    "index" => "my_index",
    "body" => [
        "query" => [
            "term" => [
                "field_name" => "value"
            ]
        ]
    ]
];
$result = $client->search($params);

全文搜索 简单文本查询

$params = [
    "index" => "my_index",
    "body" => [
        "query" => [
            "match" => [
                "field_name" => "query"
            ]
        ]
    ]
];
$result = $client->search($params);

布尔查询

$params = [
    "index" => "my_index",
    "body" => [
        "query" => [
            "bool" => [
                "must" => [
                    [
                        "term" => [
                            "field_name" => "value1"
                        ]
                    ]
                ],
                "must_not" => [
                    [
                        "term" => [
                            "field_name" => "value2"
                        ]
                    ]
                ],
                "should" => [
                    [
                        "term" => [
                            "field_name" => "value3"
                        ]
                    ]
                ]
            ]
        ]
    ]
];
$result = $client->search($params);

聚合 求和聚合

$params = [
    "index" => "my_index",
    "body" => [
        "aggs" => [
            "total_amount" => [
                "sum" => [
                    "field" => "amount"
                ]
            ]
        ]
    ]
];
$result = $client->search($params);

直方图聚合

$params = [
    "index" => "my_index",
    "body" => [
        "aggs" => [
            "age_distribution" => [
                "histogram" => [
                    "field" => "age",
                    "interval" => 10
                ]
            ]
        ]
    ]
];
$result = $client->search($params);

实战示例 下例演示如何使用 Elasticsearch PHP 客户端进行数据查询和全文搜索：

require "vendor/autoload.php";

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

// 数据查询
$params = [
    "index" => "my_index",
    "id" => "my_id"
];
$document = $client->get($params);

// 全文搜索
$params = [
    "index" => "my_index",
    "body" => [
        "query" => [
            "match" => [
                "title" => "Elasticsearch PHP"
            ]
        ]
    ]
];
$results = $client->search($params);

// 输出结果
echo "<pre>";
print_r($document);
print_r($results);
echo "</pre>";

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