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Official PHP client for Elasticsearch.

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Elastica

2,267

Elastica is a PHP client for elasticsearch

olivere's avatar

elastic

7,474

Deprecated: Use the official Elasticsearch client for Go at https://github.com/elastic/go-elasticsearch

Quick Overview

Elasticsearch-php is the official PHP client for Elasticsearch. It provides a simple and flexible way to interact with Elasticsearch clusters, allowing developers to perform various operations such as indexing, searching, and managing documents and indices.

Pros

  • Officially supported by Elastic, ensuring compatibility and regular updates
  • Comprehensive documentation and extensive API coverage
  • Supports both synchronous and asynchronous requests
  • Flexible configuration options for connection pooling and load balancing

Cons

  • Steep learning curve for beginners due to the complexity of Elasticsearch
  • Performance overhead compared to direct HTTP requests
  • Large dependency footprint
  • Some advanced Elasticsearch features may require additional configuration

Code Examples

  1. Creating an Elasticsearch client:
use Elastic\Elasticsearch\ClientBuilder;

$client = ClientBuilder::create()
    ->setHosts(['localhost:9200'])
    ->build();
  1. Indexing a document:
$params = [
    'index' => 'my_index',
    'id'    => '1',
    'body'  => ['title' => 'Test document', 'content' => 'This is a test']
];

$response = $client->index($params);
  1. Performing a search:
$params = [
    'index' => 'my_index',
    'body'  => [
        'query' => [
            'match' => [
                'content' => 'test'
            ]
        ]
    ]
];

$results = $client->search($params);

Getting Started

  1. Install the library using Composer:
composer require elasticsearch/elasticsearch
  1. Create a client and perform a simple operation:
use Elastic\Elasticsearch\ClientBuilder;

require 'vendor/autoload.php';

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

$response = $client->info();
print_r($response);

This will connect to Elasticsearch on localhost:9200 and retrieve cluster information.

Competitor Comparisons

ruflin logo

Elastica

2,267

Elastica is a PHP client for elasticsearch

Pros of Elastica

  • More feature-rich with additional abstractions and helper methods
  • Supports both synchronous and asynchronous operations
  • Extensive documentation and examples

Cons of Elastica

  • Slightly higher learning curve due to additional abstractions
  • May have slower performance in some cases due to extra layers

Code Comparison

Elastica:

$elasticaClient = new \Elastica\Client();
$index = $elasticaClient->getIndex('my_index');
$type = $index->getType('my_type');
$document = new \Elastica\Document(1, ['name' => 'John Doe']);
$type->addDocument($document);

elasticsearch-php:

$client = \Elasticsearch\ClientBuilder::create()->build();
$params = [
    'index' => 'my_index',
    'type' => 'my_type',
    'id' => 1,
    'body' => ['name' => 'John Doe']
];
$response = $client->index($params);

Both libraries provide PHP clients for Elasticsearch, but Elastica offers a more object-oriented approach with additional abstractions. elasticsearch-php, being the official client, provides a lower-level API that closely mirrors the Elasticsearch REST API. The choice between the two depends on your specific needs, with Elastica being more suitable for complex applications requiring additional features, while elasticsearch-php offers a simpler, more direct approach to interacting with Elasticsearch.

olivere logo

elastic

7,474

Deprecated: Use the official Elasticsearch client for Go at https://github.com/elastic/go-elasticsearch

Pros of elastic

  • Written in Go, offering better performance and concurrency
  • More comprehensive and feature-rich API
  • Active development with frequent updates and releases

Cons of elastic

  • Steeper learning curve due to more complex API
  • Larger codebase, potentially leading to longer compilation times
  • May be overkill for simple Elasticsearch interactions

Code Comparison

elasticsearch-php:

$client = ClientBuilder::create()->build();
$params = [
    'index' => 'my_index',
    'body'  => ['testField' => 'abc']
];
$response = $client->index($params);

elastic:

client, _ := elastic.NewClient()
_, err := client.Index().
    Index("my_index").
    BodyJson(map[string]interface{}{"testField": "abc"}).
    Do(context.Background())

Summary

While elasticsearch-php offers a simpler API and is the official PHP client, elastic provides a more robust and performant solution for Go developers. The choice between the two largely depends on the programming language preference and the complexity of the Elasticsearch interactions required in the project.

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README

Elastic logo

Elasticsearch PHP client

Build status Latest Stable Version Total Downloads

This is the official PHP client for Elasticsearch.

You can run Elasticsearch and Kibana on your local machine using this command:

curl -fsSL https://elastic.co/start-local | sh

or sign-up for a free trial of Elastic Cloud.

Contents

Installation

Refer to the Installation section of the getting started documentation.

Connecting

Refer to the Connecting section of the getting started documentation.

Usage

The elasticsearch-php client offers 500+ endpoints for interacting with Elasticsearch. A list of all these endpoints is available in the official documentation of Elasticsearch APIs.

Here we reported the basic operation that you can perform with the client: index, search and delete.

Versioning

This client is versioned and released alongside Elasticsearch server.

To guarantee compatibility, use the most recent version of this library within the major version of the corresponding Enterprise Search implementation.

For example, for Elasticsearch 8.16, use 8.16 of this library or above, but not 9.0.

Compatibility

The Elasticsearch client is compatible with currently maintained PHP versions.

Language clients are forward compatible; meaning that clients support communicating with greater or equal minor versions of Elasticsearch without breaking. It does not mean that the client automatically supports new features of newer Elasticsearch versions; it is only possible after a release of a new client version. For example, a 8.12 client version won't automatically support the new features of the 8.13 version of Elasticsearch, the 8.13 client version is required for that. Elasticsearch language clients are only backwards compatible with default distributions and without guarantees made.

Elasticsearch VersionElasticsearch-PHP BranchSupported
mainmain
9.x9.x9.x
8.x8.x8.x

Backward Incompatible Changes :boom:

The 9.0.0 version of elasticsearch-php contains the same architecture of 8.x. It supports PSR-7 for HTTP messages and PSR-18 for HTTP client communications.

We tried to avoid BC breaks for 9.x, here the main changes:

  • Compatibility with Elasticsearch 9.0: All changes and additions to Elasticsearch APIs for its 9.0 release are reflected in this release.
  • Serverless client merged in: the elastic/elasticsearch-serverless client is being deprecated, and its functionality has been merged back into this client. This should have zero impact on the way the client works by default. If an endpoint is available in serverless, the PHP function will contains a @group serverless phpdoc attribute. If you try to use an endpoint that is not available in serverless you will get a 410 HTTP error with a message as follows: "this endpoint exists but is not available when running in serverless mode". The 9.0.0 client can recognize that it is communicating with a serverless instance if you are using a URL managed by Elastic (e.g. *.elastic.cloud). If you are using a proxy, the client will be able to recognize that the host is serverless from the first response. Alternatively, you can explicitly indicate that the host is serverless using the Client::setServerless(true) function (false by default).
  • New transport library with PSR-18 cURL client as default: we've removed the Guzzle dependency from the client. By default, the built-in cURL-based HTTP client will be used if no other PSR-18 compatible clients are detected. See release 9.0.0 of elastic-transport-php.

You can have a look at the BREAKING_CHANGES file for more information.

Mock the Elasticsearch client

If you need to mock the Elasticsearch client you just need to mock a PSR-18 HTTP Client.

For instance, you can use the php-http/mock-client as follows:

use Elastic\Elasticsearch\ClientBuilder;
use Elastic\Elasticsearch\Response\Elasticsearch;
use Http\Mock\Client;
use Nyholm\Psr7\Response;

$mock = new Client(); // This is the mock client

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

// This is a PSR-7 response
$response = new Response(
    200, 
    [Elasticsearch::HEADER_CHECK => Elasticsearch::PRODUCT_NAME],
    'This is the body!'
);
$mock->addResponse($response);

$result = $client->info(); // Just calling an Elasticsearch endpoint

echo $result->asString(); // This is the body!

We are using the ClientBuilder::setHttpClient() to set the mock client. You can specify the response that you want to have using the addResponse($response) function. As you can see the $response is a PSR-7 response object. In this example we used the Nyholm\Psr7\Response object from the nyholm/psr7 project. If you are using PHPUnit you can even mock the ResponseInterface as follows:

$response = $this->createMock('Psr\Http\Message\ResponseInterface');

Notice: we added a special header in the HTTP response. This is the product check header, and it is required for guarantee that elasticsearch-php is communicating with an Elasticsearch server 8.0+.

For more information you can read the Mock client section of PHP-HTTP documentation.

FAQ 🔮

Where do I report issues with the client?

If something is not working as expected, please open an issue.

Where else can I go to get help?

You can checkout the Elastic community discuss forums.

Contribute 🚀

We welcome contributors to the project. You can refer to the CONTRIBUTING guide for more information.

Thanks in advance for your contribution! :heart:

License 📗

MIT © Elastic