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Using Neo4j from PHP
If you are a PHP developer, this guide provides an overview of options for connecting to Neo4j. While this guide is not comprehensive it will introduce the different drivers and link to the relevant resources.
You should be familiar with graph database concepts and the property graph model. You should have installed Neo4j and made yourself familiar with our Cypher Query language.
Neo4j for PHP Developers
You’re a PHP developer and want to start with Neo4j? Here you go.
Whether you’re using frameworks like Symfony and Laravel or you’re developing without frameworks, you’ll find an adequate library for your use case.
If you have any questions, you can always find a community member around on the Neo4j Online Community.
Members of the PHP community have invested a lot of time and love to develop all these drivers, so please if you use them, provide feedback to the authors.
Using Neo4j in a standalone PHP environment
If you prefer to develop without frameworks, these libraries are made for you:
GraphAware PHP Client
GraphAware PHP Client is a powerful and flexible PHP Client for Neo4j with MultiDB support, full High-Availability support for Neo4j Enterprise, and a convenient object formatter for handling graph results. The 4.0 release contains the following features:
- Support for the Bolt binary protocol
- Full-fledged Response Graph format
- Full High-Availability support, with master re-election detection, slaves fallback built-in mechanism, and convenience methods for directing write and read queries to different databases.
- Enterprise support by GraphAware
<?php
require_once 'vendor/autoload.php';
use GraphAware\Neo4j\Client\ClientBuilder;
$client = ClientBuilder::create()
->addConnection('bolt', 'bolt://neo4j:password@localhost:7687')
->build();
$query = "MATCH (n:Person)-[:FOLLOWS]->(friend) RETURN n.name, collect(friend) as friends";
$result = $client->run($query);
foreach ($result->getRecords() as $record) {
echo sprintf('Person name is : %s and has %d number of friends', $record->value('name'), count($record->value('friends'));
}Author |
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Example |
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Docs |
https://github.com/graphaware/neo4j-php-client/blob/master/README.md |
GraphAware OGM for Neo4j and PHP
GraphAware Neo4j-PHP-OGM is an object graph mapper for Neo4j in PHP. Highly inspired by Doctrine2, it uses annotations to defined mapping and all the operations to the graph are centralized via an EntityManager.
<?php
namespace Movies;
use Doctrine\Common\Collections\ArrayCollection;
use GraphAware\Neo4j\OGM\Annotations as OGM;
/**
* @OGM\Node(label="Movie")
*/
class Movie
{
/**
* @OGM\GraphId()
* @var int
*/
protected $id;
/**
* @OGM\Property(type="string")
* @var string
*/
protected $title;
/**
* @OGM\Property(type="string")
* @var string
*/
protected $tagline;
/**
* @OGM\Property(type="int")
* @var int
*/
protected $release;
/**
* @OGM\Relationship(type="ACTED_IN", direction="OUTGOING", targetEntity="Person", collection=true)
* @var ArrayCollection|Person[]
*/
protected $actors;
/**
* @param string $title
* @param string|null $release
*/
public function __construct($title, $release = null)
{
$this->title = $title;
$this->release = $release;
$this->actors = new ArrayCollection();
}
// Getters and Setters<?php
$user = new User('cypher666');
/** @var Movie $movie */
$movie = $em->getRepository(Movie::class)->findOneBy('title', 'The Matrix');
$user->rateMovie($movie, '4.5');
$em->persist($user);
$em->flush();Author |
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Package |
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Source |
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Docs |
https://github.com/graphaware/neo4j-php-ogm/blob/1.0/docs/01-intro.md |
Neo4j Symfony Bundle
To provide a smooth integration between Neo4j and Symfony we’ve created the SymfonyNeo4jBundle. It wraps the excellent PHP community client by Graphaware and creates a solid Symfony experience. Thanks to the WebProfiler integration, you will see all your database calls, all the queries and their results, exceptions and statistics.
The bundle also integrates the client events with the Symfony event dispatcher. It is not opinionated in how you are using Neo4j and using the OGM is optional. Advanced Neo4j users will have full control over the client and what Cypher gets executed.
Authors |
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Source |
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Docs |
https://github.com/neo4j-contrib/neo4j-symfony/blob/master/README.md |
Blog |
https://www.sitepoint.com/introducing-the-neo4j-symfony-bundle/ |
Applications built with PHP and Neo4j
Thesaurus Manager
If you want to built your own thesaurus, this app is made for you
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Example |
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The Example Project
The Neo4j example project is a small, one page webapp for the movies database built into the Neo4j tutorial. The front-end page is the same for all drivers: movie search, movie details, and a graph visualization of actors and movies. Each backend implementation shows you how to connect to Neo4j from each of the different languages and drivers.
You can learn more about our small, consistent example project across many different language drivers here. You will find the implementations for all drivers as individual GitHub repositories, which you can clone and deploy directly.