全文搜索引擎Elasticsearch安装（Windows），elasticsearch-php使用案例

安装Elasticsearch

1.首先要有JDK环境，确保JDK8及以上版本
1.1：需要注册账号下载，可以自己注册，也可以网上搜账号

https://www.oracle.com/java/technologies/javase-jdk11-downloads.html

1.2：配置环境变量：创建变量JAVA_HOME，值是你安装jdk的路径

然后编辑path添加变量

2：安装Elasticsearch服务,选择window。(这里我安装了6.8.8版本)

https://www.elastic.co/cn/downloads/past-releases#elasticsearch

2.1：下好后进入bin目录点击elasticsearch.bat（在window系统中不要关闭）

2.2：访问http://localhost:9200/，Elasticsearch服务安装完成。

详细配置可在官方文档查看。

https://www.elastic.co/guide/en/elasticsearch/reference/6.8/getting-started.html

elasticsearch-php安装使用

1：Elasticsearch-php 的安装需要满足以下 4 个需求：

PHP 7.0.0 或更高版本
Composer
ext-curl：PHP 的 Libcurl 扩展
原生 JSON 扩展 (ext-json) 1.3.7或更高版本

1.1：在cd到你项目下，
更换composer镜像地址，则执行：

composer -g config repo.packagist composer https://packagist.phpcomposer.com

执行以下命令，进行安装

composer require elasticsearch/elasticsearch

Elasticsearch-php安装完成，会在当前目录生成一下目录和文件：composer.json，composer.lock，vendor/

使用脚本示例

<?php
require 'vendor/autoload.php';
$client = new Elasticsearch\Client();

2：案例(mysql)
2.1:创建数据库（elastic）和表（articles）数据测试：

create table articles(id int not null primary key auto_increment,title varchar(200) not null comment '标题',content text comment '内容',price int not null comment '金额'
);insert into articles(title, content) values ('李白', '酒仙刺客',100),
('孙悟空', '腾云驾雾的辜负了紫霞的刺客。',300),
('胡歌', '尽职励志，不错哦。',1000000),
('王者荣耀', '游戏就玩王者荣耀。',98),
('鲁班', '小短腿，谁都想灭。',998),
('妲己', '祸国殃民。',998),
('吕布', '方天画戟，后手放大',2998),
('水晶', '保护我方水晶，进攻地方水晶。',19999);

2.2：php使用Elasticsearch-php

<?php
require './vendor/autoload.php';
use Elasticsearch\ClientBuilder;
class ES {private $client;public function __construct(){$params = array('127.0.0.1:9200');$this->client = ClientBuilder::create()->setHosts($params)->build();}//创建索引function createIndex($index_name = 'aki'){$params = ['index' => $index_name,'body' => ['settings' => ['number_of_shards' => 2,'number_of_replicas' => 0],]];return $this->client->indices()->create($params);}//是否存在索引public function existsIndex($index_name = 'aki'){$params = ['index' => $index_name];if($this->client->indices()->exists($params)){return true;}return false;}// 删除索引public function delIndex($index_name = 'aki') {$params = ['index' => $index_name];if($this->client->indices()->exists($params)){$this->client->indices()->delete($params);// echo "true";return true;}// echo "false";return false;}// 添加文档public function addDoc($id,$doc,$index_name = 'aki',$type_name = 'form') {$params = ['index' => $index_name,'type' => $type_name,'id' => $id,'body' => $doc];return $this->client->index($params);}// 判断文档存在public function existsDoc($id = 1,$index_name = 'aki',$type_name = 'form') {$params = ['index' => $index_name,'type' => $type_name,'id' => $id];return $this->client->exists($params);}// 获取文档public function getDoc($id = 1,$index_name = 'aki',$type_name = 'form') {$params = ['index' => $index_name,'type' => $type_name,'id' => $id];return $this->client->get($params);}// 更新文档public function updateDoc($id,$doc,$index_name = 'aki',$type_name = 'form') {// 可以灵活添加新字段,最好不要乱添加$params = ['index' => $index_name,'type' => $type_name,'id' => $id,'body' => ['doc' =>$doc]];return $this->client->update($params);}// 删除文档public function delDoc($id,$index_name = 'aki',$type_name = 'form') {$params = ['index' => $index_name,'type' => $type_name,'id' => $id];return $this->client->delete($params);}// 查询文档 (分页，排序，权重，过滤)public function searchDoc($keywords = "竞赛",$index_name = "aki",$type_name = "form",$sort = [],$from = 0,$size = 10) {$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' => ['prices'=>['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 $results['hits']['hits'];}
}//--------------------------------------------------------------------------------------------//测试实例：$es = new ES();//使用mysql测试// $es->delIndex("mysql");// $es->createIndex("mysql");       //创建索引$ismysql = false;if($ismysql == true){// $es->delIndex("mysql");$isidnex = $es->existsIndex("mysql");if($isidnex == false){$es->createIndex("mysql");        //创建索引}try {$servername = "localhost";$username = "root";$password = "123";$dbname = "elastic";//   // 创建连接$conn = new mysqli($servername, $username, $password, $dbname);// Check connectionif ($conn->connect_error) {die("连接失败: " . $conn->connect_error);} $sql = "select * from articles";$result = $conn->query($sql);if ($result->num_rows > 0) {//        // 输出数据while($row = $result->fetch_assoc()) {// if(empty($es->getDoc($row['id'],"mysql"))){//    $es->addDoc($row['id'],$row,"mysql");// }$es->addDoc($row['id'],$row,"mysql");}$r = $es->searchDoc("李白 歌 水","mysql");echo "<pre>";print_r($r);} else {echo "0 结果";}$conn->close();$r = $es->searchDoc("李白 歌 水","mysql");} catch (Exception $e) {echo $e->getMessage();}}else{// $es->delIndex();$isidnex = $es->existsIndex();if($isidnex == false){$es->createIndex();       //创建索引}//静态测试数据测试$docs = [];$docs[] = ['id'=>1,'title'=>'李白','content'=>'酒仙刺客','price'=>100];$docs[] = ['id'=>2,'title'=>'孙悟空','content'=>'腾云驾雾的辜负了紫霞的刺客。','price'=>300];$docs[] = ['id'=>3,'title'=>'胡歌','content'=>'尽职励志，不错哦。','price'=>1000000];$docs[] = ['id'=>4,'title'=>'王者荣耀','content'=>'游戏就玩王者荣耀。','price'=>998];$docs[] = ['id'=>5,'title'=>'鲁班','content'=>'小短腿，谁都想灭。','price'=>98];$docs[] = ['id'=>6,'title'=>'妲己','content'=>'祸国殃民。','price'=>998];$docs[] = ['id'=>7,'title'=>'吕布','content'=>'方天画戟，后手放大','price'=>2998];$docs[] = ['id'=>8,'title'=>'水晶','content'=>'保护我方水晶，进攻地方水晶。','price'=>19999];foreach ($docs as $k => $v) {$es->addDoc($v['id'],$v);      //添加文档};$r = $es->searchDoc("李白 歌 水");echo "<pre>";print_r($r);}

测试数据显示：