Include elasticsearch-php in your composer.json file:

{
    "require": {
        "elasticsearch/elasticsearch": "~6.7.0"
    }
}

Install the client with composer:

curl -s http://getcomposer.org/installer | php
php composer.phar install --no-dev

Include the autoloader in your main project (if you haven’t already), and instantiate a new client :

require 'vendor/autoload.php';

use Elasticsearch\ClientBuilder;

$client = ClientBuilder::create()->build();