RedisGraph-PHP: Redislabs Redis Graph PHP Client

RedisGraph-PHP provides PHP Client for Redislabs' RedisGraph Module. This library supports both widely used redis clients (PECL Redis Extension and Predis).

Important

Read this announcement details before decide to use this library: RedisGraph End-of-Life Announcement

About RedisGraph

"RedisGraph is the first queryable Property Graph database to use sparse matrices to represent the adjacency matrix in graphs and linear algebra to query the graph."

More info about Redis Graph.

RedisGraph-PHP Interface

You can run any RedisGraph Query command using these functions.

<?php

use Redislabs\Module\RedisGraph\Interfaces\QueryInterface;
use Redislabs\Module\RedisGraph\Result;

interface RedisGraph
{
    public function rawQuery(QueryInterface $query) : array
    public function query(QueryInterface $query) : Result
    public function delete(string $name) : string;
    public function explain(QueryInterface $query) : string;
    public function commit(QueryInterface $query) : Result
}

Installation

The recommended method to install RedisGraph-PHP is with composer.

composer require mkorkmaz/redislabs-redisgraph-php

Usage

You need PECL Redis Extension or Predis to use RedisGraph-PHP.

Creating RedisGraph Client

Example for PECL Redis Extension

<?php
declare(strict_types=1);

use Redis;
use Redislabs\Module\RedisGraph\RedisGraph;

$redisClient = new Redis();
$redisClient->connect('127.0.0.1');
$redisGraph = RedisGraph::createWithPhpRedis($redisClient);

Example for Predis

<?php
declare(strict_types=1);

use Predis;
use Redislabs\Module\RedisGraph\RedisGraph;

$redisClient = new Predis\Client();
$redisGraph = RedisGraph::createWithPredis($redisClient);

Constructing a Graph.

<?php


use Redislabs\Module\RedisGraph\Node;
use Redislabs\Module\RedisGraph\Edge;
use Redislabs\Module\RedisGraph\GraphConstructor;

$labelSource =  'person';
$labelDestination =  'country';

$propertiesSource = ['name' => 'John Doe', 'age' => 33, 'gender' => 'male', 'status' => 'single'];
$propertiesDestination = ['name' => 'Japan'];
$edgeProperties = ['purpose' => 'pleasure', 'duration' => 'two weeks'];

$person = Node::createWithLabel($labelSource)
	->withProperties($propertiesSource)
	->withAlias('CatOwner');
$country = Node::createWithLabelAndProperties($labelDestination, $propertiesDestination)
	->withAlias('CatCountry');

$edge = Edge::create($person, 'visited', $country)
	->withProperties($edgeProperties);

$graph = new GraphConstructor('TRAVELLERS');
$graph->addNode($person);
$graph->addNode($country);
$graph->addEdge($edge);
$commitQuery = $graph->getCommitQuery();

$result = $redisGraph->commit($commitQuery);

var_dump($result->getLabelsAdded()); // int(2)
var_dump($result->getNodesCreated()); // int(2)
var_dump($result->getLabelsAdded()); // int(2)
var_dump($result->getNodesDeleted()); // int(0)
var_dump($result->getRelationshipsCreated()); // int(1)
var_dump($result->getRelationshipsDeleted()); // int(0)
var_dump($result->getPropertiesSet()); // int(7)
var_dump($result->getExecutionTime()); // float(0.9785)


$propertiesSource = ['name' => 'Jane Doe', 'age' => 30, 'gender' => 'female', 'status' => 'single'];
$propertiesDestination = ['name' => 'Japan'];
$edgeProperties = ['purpose' => 'pleasure', 'duration' => 'one weeks'];

$person2 = Node::createWithLabel($labelSource)->withProperties($propertiesSource);
$country2 = Node::createWithLabelAndProperties($labelDestination, $propertiesDestination);
$edge2 = Edge::merge($person2, 'visited', $country2)->withProperties($edgeProperties);

$propertiesSource = ['name' => 'Kedibey', 'age' => 13, 'gender' => 'male', 'status' => 'single'];
$propertiesDestination = ['name' => 'Turkey'];
$edgeProperties = ['purpose' => 'living', 'duration' => 'whole life'];

$person3 = Node::createWithLabel($labelSource)->withProperties($propertiesSource);
$country3 = Node::createWithLabelAndProperties($labelDestination, $propertiesDestination);
$edge3 = Edge::merge($person3, 'visited', $country3)->withProperties($edgeProperties);

$graph = new GraphConstructor('TRAVELLERS');
$graph->addNode($person2);
$graph->addNode($country2);
$graph->addEdge($edge2);
$graph->addNode($person3);
$graph->addNode($country3);
$graph->addEdge($edge3);

$commitQuery = $graph->getCommitQueryWithMerge();
$this->redisGraph->commit($commitQuery);

Querying a Graph.

use Redislabs\Module\RedisGraph\Query;

$matchQueryString = 'MATCH (p:person)-[v:visited {purpose:"pleasure"}]->(c:country)
	RETURN p.name, p.age, v.purpose, v.duration, c.name';
$matchQuery = new Query('TRAVELLERS', $matchQueryString);

$result = $redisGraph->query($matchQuery);
$labels = $result->getLabels();
$resultSet = $result->getResultSet();

var_dump($labels); // Dumps column labels
var_dump($resultSet[0]); // Dumps first result
...

$result->prettyPrint();

/* Prints

------------------------------------------------------
| p.name   | p.age | v.purpose | v.duration | c.name | 
------------------------------------------------------
| John Doe | 33    | pleasure  | two weeks  | Japan  | 
| Jane Doe | 30    | pleasure  | one weeks  | Japan  | 
------------------------------------------------------

*/

Cypher Query Builder

This library does not provide Query Builder, but you can use mper/cypher-querybuilder

1. Install the library.

composer require mper/cypher-querybuilder

2. Then build your query

<?php

use MP\Cypher\QueryBuilder;

$queryBuilder = new QueryBuilder();

$queryBuilder->addMatch()
    ->addNode('p', 'person')
    ->relation('v', 'visited', ['purpose' => 'pleasure'])->right()
    ->node('c', 'country');

$matchQueryString = $queryBuilder->getQuery('p.name', 'p.age', 'v.purpose', 'c.name');

echo $matchQueryString; 

// Prints "MATCH (p:person)-[v:visited {purpose:'pleasure'}]->(c:country) RETURN p.name,p.age,v.purpose,c.name"

Test and Development

You can use Docker Image provided by Redislabs.

docker run -p 6379:6379 --name redis-redisgraph redislabs/redisgraph:latest