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Official PHP client for Elasticsearch.

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Elastica

2,256

Elastica is a PHP client for elasticsearch

olivere's avatar

elastic

7,374

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

2,256

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

7,374

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.

Download the latest version of Elasticsearch 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 400+ 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 7.16, use 7.16 of this library or above, but not 8.0.

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
8.x8.x8.x
7.x7.x7.17

Backward Incompatible Changes :boom:

The 8.0.0 version of elasticsearch-php contains a new implementation compared with 7.x. It supports PSR-7 for HTTP messages and PSR-18 for HTTP client communications.

We tried to reduce the BC breaks as much as possible with 7.x but there are some (big) differences:

  • we changed the namespace, now everything is under Elastic\Elasticsearch
  • we used the elastic-transport-php library for HTTP communications;
  • we changed the Exception model, using the namespace Elastic\Elasticsearch\Exception. All the exceptions extends the ElasticsearchException interface, as in 7.x
  • we changed the response type of each endpoints using an Elasticsearch response class. This class wraps a a PSR-7 response allowing the access of the body response as array or object. This means you can access the API response as in 7.x, no BC break here! :angel:
  • we changed the ConnectionPool in NodePool. The connection naming was ambigous since the objects are nodes (hosts)

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. Before you begin, some useful info...

  • If you want to contribute to this project you need to subscribe to a Contributor Agreement.
  • Before opening a pull request, please create an issue to discuss the scope of your proposal.
  • If you want to send a PR for version 8.0 please use the 8.0 branch, for 8.1 use the 8.1 branch and so on.
  • Never send PR to master unless you want to contribute to the development version of the client (master represents the next major version).
  • Each PR should include a unit test using PHPUnit. If you are not familiar with PHPUnit you can have a look at the reference.

Thanks in advance for your contribution! :heart:

License 📗

MIT © Elastic