php代码实现elasticsearch查询并实时更新数据
时间: 2023-08-12 21:25:51 浏览: 47
要实现 Elasticsearch 查询并实时更新数据,你可以按照以下步骤进行:
1. 安装 Elasticsearch:你需要在本地或服务器上安装 Elasticsearch,并启动它。你可以从官方网站下载并安装 Elasticsearch。
2. 安装 Elasticsearch PHP 客户端:你需要安装 Elasticsearch PHP 客户端,以便能够与 Elasticsearch 进行交互。你可以使用 composer 进行安装,使用以下命令:
```
composer require elasticsearch/elasticsearch
```
3. 编写 PHP 代码:你需要编写 PHP 代码来连接 Elasticsearch 并查询数据。以下是一个示例代码:
```php
require 'vendor/autoload.php';
$client = Elasticsearch\ClientBuilder::create()->build();
$params = [
'index' => 'myindex',
'type' => 'mytype',
'body' => [
'query' => [
'match' => [
'title' => 'php'
]
]
]
];
$response = $client->search($params);
foreach ($response['hits']['hits'] as $hit) {
echo $hit['_source']['title'] . "\n";
}
$lastUpdated = $response['hits']['hits'][0]['_source']['updated_at'];
$params = [
'index' => 'myindex',
'type' => 'mytype',
'body' => [
'query' => [
'range' => [
'updated_at' => [
'gt' => $lastUpdated
]
]
]
]
];
while (true) {
$response = $client->search($params);
foreach ($response['hits']['hits'] as $hit) {
echo $hit['_source']['title'] . "\n";
}
$lastUpdated = $response['hits']['hits'][0]['_source']['updated_at'];
sleep(10);
$params['body']['query']['range']['updated_at']['gt'] = $lastUpdated;
}
```
以上代码会查询 Elasticsearch 中包含 "php" 的文档,并输出它们的标题。然后代码会每 10 秒查询 Elasticsearch 中更新时间大于上次查询的文档,并输出它们的标题。
以上是使用 PHP 代码实现 Elasticsearch 查询并实时更新数据的基本步骤。你可以根据自己的需求进行调整和优化。