Include elasticsearch-php in your composer.json file. If you are starting a new project, simply paste the following JSON snippet into a new file called composer.json. If you have an existing project, include this requirement under the rest of requirements already present:

{
    "require": {
        "elasticsearch/elasticsearch": "~0.4"
    }
}

Install the client with composer. The first command download the composer.phar PHP package, and the second command invokes the installation. Composer will automatically download any required dependencies, store them in a /vendor/ directory and build an autoloader.:

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

Finally, include the generated autoloader in your main project. If your project is already based on Composer, the autoloader is likely already included somewhere and you don’t need to add it again. Finally, instantiate a new client:

require 'vendor/autoload.php';

$client = new Elasticsearch\Client();