A GraphQL client using the Symfony HttpClient component

example.php

<?php

$query = <<<'GRAPHQL'
query GetUser($user: String!) {
   user (login: $user) {
    name
    email
    repositoriesContributedTo {
      totalCount
    }
  }
}
GRAPHQL;

graphql_query('https://api.github.com/graphql', $query, ['user' => 'dunglas'], 'my-oauth-token');

graphql-client.php

<?php

// composer require symfony/http-client
require __DIR__.'/vendor/autoload.php';

use Symfony\Component\HttpClient\HttpClient;
use Symfony\Component\HttpClient\HttpOptions;

function graphql_query(string $endpoint, string $query, array $variables = [], ?string $token = null): array
{
    $options = (new HttpOptions())
        ->setJson(['query' => $query, 'variables' => $variables])
        ->setHeaders([
            'Content-Type' => 'application/json',
            'User-Agent' => 'Symfony GraphQL client'
        ])
    ;

    if (null !== $token) {
        $options->setAuthBearer($token);
    }

    return HttpClient::create()
        ->request('POST', $endpoint, $options->toArray())
        ->toArray()
    ;
}