在php中使用Elasticsearch分布式搜索引擎

配置composer.json

{
  "require": {
    "elasticsearch/elasticsearch": "7.3.0"
  },
  "repositories": {
    "packagist": {
      "type": "composer",
      "url": "https://mirrors.aliyun.com/composer/"
    }
  }
}

创建MyElasticSearch类

MyElasticSearch.php

<?php

class MyElasticSearch
{
    private $es;

    // 构造函数
    public function __construct()
    {
    //路径要保证和自己的目录一致
        include('./vendor/autoload.php');
        $params = array(
            '127.0.0.1:9200'
        );
        $this->es = \Elasticsearch\ClientBuilder::create()->setHosts($params)->build();
    }

    public function search()
    {
        $params = [
            'index' => 'company_user',//改成自己的index
            'type' => '_doc',//改成自己的type
            'body' => [
                'query' => [
                    'constant_score' => [ //非评分模式执行
                        'filter' => [ //过滤器，不会计算相关度，速度快
                            'term' => [ //精确查找，不支持多个条件
                                'user_name' => '谭'
                            ]
                        ]

                    ]
                ]
            ]
        ];

        $res = $this->es->search($params);
        echo "<pre>";
        print_r($res);
    }
}

?>

创建引用MyElasticSearch.php的文件

index.php

<?php
require "./MyElasticSearch.php";

$es = new MyElasticSearch();

$es->search();

目录结构如图：

访问网址：www.qipa250.com/index.php

得到如下图，表示查询成功

官方样例整合

<?php

class MyElasticSearch
{
    private $client;

    // 构造函数
    public function __construct()
    {
        include('./vendor/autoload.php');
        $params = array(
            '47.104.108.224:9200'
        );
        $this->client = \Elasticsearch\ClientBuilder::create()->setHosts($params)->build();
    }

    public function search()
    {
        $params = [
            'index' => 'company_user',
            'type' => '_doc',
            'body' => [
                'query' => [
                    'constant_score' => [ //非评分模式执行
                        'filter' => [ //过滤器，不会计算相关度，速度快
                            'term' => [ //精确查找，不支持多个条件
                                'user_name' => '强'
                            ]
                        ]

                    ]
                ]
            ]
        ];

        $res = $this->client->search($params);

        echo "<pre>";
        print_r($res);
    }

// 创建索引
    public function create_index($index_name = 'test_ik')
    { // 只能创建一次
        $params = [
            'index' => $index_name,
            'body' => [
                'settings' => [
                    'number_of_shards' => 5,
                    'number_of_replicas' => 0
                ]
            ]
        ];

        try {
            return $this->client->indices()->create($params);
        } catch (Elasticsearch\Common\Exceptions\BadRequest400Exception $e) {
            $msg = $e->getMessage();
            $msg = json_decode($msg, true);
            return $msg;
        }
    }


    // 删除索引
    public function delete_index($index_name = 'test_ik')
    {
        $params = ['index' => $index_name];
        $response = $this->client->indices()->delete($params);
        return $response;
    }

    // 创建文档模板
    public function create_mappings($type_name = 'goods', $index_name = 'test_ik')
    {

        $params = [
            'index' => $index_name,
            'type' => $type_name,
            'body' => [
                $type_name => [
                    '_source' => [
                        'enabled' => true
                    ],
                    'properties' => [
                        'id' => [
                            'type' => 'integer', // 整型
                            'index' => 'not_analyzed',
                        ],
                        'title' => [
                            'type' => 'string', // 字符串型
                            'index' => 'analyzed', // 全文搜索
                            'analyzer' => 'ik_max_word'
                        ],
                        'content' => [
                            'type' => 'string',
                            'index' => 'analyzed',
                            'analyzer' => 'ik_max_word'
                        ],
                        'price' => [
                            'type' => 'integer'
                        ]
                    ]
                ]
            ]
        ];

        $response = $this->client->indices()->putMapping($params);
        return $response;
    }

    // 查看映射
    public function get_mapping($type_name = 'goods', $index_name = 'test_ik')
    {
        $params = [
            'index' => $index_name,
            'type' => $type_name
        ];
        $response = $this->client->indices()->getMapping($params);
        return $response;
    }

    // 添加文档
    public function add_doc($id, $doc, $index_name = 'shundata', $type_name = 'app')
    {
        $params = [
            'index' => $index_name,
            'type' => $type_name,
            'id' => $id,
            'body' => $doc
        ];

        $response = $this->client->index($params);
        return $response;
    }

    // 判断文档存在
    public function exists_doc($id = 1, $index_name = 'test_ik', $type_name = 'goods')
    {
        $params = [
            'index' => $index_name,
            'type' => $type_name,
            'id' => $id
        ];

        $response = $this->client->exists($params);
        return $response;
    }


    // 获取文档
    public function get_doc($id = 1, $index_name = 'test_ik', $type_name = 'goods')
    {
        $params = [
            'index' => $index_name,
            'type' => $type_name,
            'id' => $id
        ];

        $response = $this->client->get($params);
        return $response;
    }

    // 更新文档
    public function update_doc($id = 1, $index_name = 'test_ik', $type_name = 'goods')
    {
        // 可以灵活添加新字段,最好不要乱添加
        $params = [
            'index' => $index_name,
            'type' => $type_name,
            'id' => $id,
            'body' => [
                'doc' => [
                    'title' => '苹果手机iPhoneX'
                ]
            ]
        ];

        $response = $this->client->update($params);
        return $response;
    }

    // 删除文档
    public function delete_doc($id = 1, $index_name = 'test_ik', $type_name = 'goods')
    {
        $params = [
            'index' => $index_name,
            'type' => $type_name,
            'id' => $id
        ];

        $response = $this->client->delete($params);
        return $response;
    }

    // 查询文档 (分页，排序，权重，过滤)
    public function search_doc($keywords = "电脑", $index_name = "shundata", $type_name = "app", $from = 0, $size = 2)
    {
        $params = [
            'index' => $index_name,
            'type' => $type_name,
            'body' => [
                'query' => [
                    'bool' => [
                        'should' => [
                            ['match' => ['title' => [
                                'query' => $keywords,
                                'boost' => 3, // 权重大
                            ]]],
                            ['match' => ['content' => [
                                'query' => $keywords,
                                'boost' => 2,
                            ]]],
                        ],
                    ],
                ],
                'sort' => ['price' => ['order' => 'desc']]
                , 'from' => $from, 'size' => $size
            ]
        ];

        $results = $this->client->search($params);
//        $maxScore  = $results['hits']['max_score'];
//        $score = $results['hits']['hits'][0]['_score'];
//        $doc   = $results['hits']['hits'][0]['_source'];
        return $results;
    }


}

?>

调用官方样例

<?php
require "./MyElasticSearch.php";

$es = new MyElasticSearch();

//$es->search();

$index = 'shundata';
$type = 'app';

//$r = $es->delete_index($index);


//$r = $es->create_index($index);

//$r = $es->create_mappings($type, $index);

//$r = $es->get_mapping($type, $index);


$docs = [];
$docs[] = ['id' => 1, 'title' => '苹果手机', 'content' => '苹果手机，很好很强大。', 'price' => 1000];
$docs[] = ['id' => 2, 'title' => '华为手环', 'content' => '荣耀手环，你值得拥有。', 'price' => 300];
$docs[] = ['id' => 3, 'title' => '小度音响', 'content' => '智能生活，快乐每一天。', 'price' => 100];
$docs[] = ['id' => 4, 'title' => '王者荣耀', 'content' => '游戏就玩王者荣耀，快乐生活，很好很强大。', 'price' => 998];
$docs[] = ['id' => 5, 'title' => '小汪糕点', 'content' => '糕点就吃小汪，好吃看得见。', 'price' => 98];
$docs[] = ['id' => 6, 'title' => '小米手环3', 'content' => '秒杀限量，快来。', 'price' => 998];
$docs[] = ['id' => 7, 'title' => 'iPad', 'content' => 'iPad，不一样的电脑。', 'price' => 2998];
$docs[] = ['id' => 8, 'title' => '中华人民共和国', 'content' => '中华人民共和国，伟大的国家。', 'price' => 19999];

foreach ($docs as $k => $v) {
    $r = $es->add_doc($v['id'], $v);
    echo "<pre>";
    print_r($r);
}

/*$r = $es->get_doc();

$r = $es->update_doc();

$r = $es->delete_doc();

$r = $es->exists_doc();*/


$r = $es->search_doc("手环 电脑");
$r = $es->search_doc("玩");
$r = $es->search_doc("中华");

echo "<pre>";
print_r($r);