PHP GraphQL Query Helper

example.php

<?php

require_once('GraphQLHelper.php');

$graphql = new GraphQLHelper();

$args = [
    'search' => 'Monkey D. Luffy'
];

$query = <<<'GRAPHQL'
query searchCharacter($search: String) {
  Character(search: $search) {
    id
    name {
      first
      last
      full
    }
    image {
      medium
    }
    description
  }
}
GRAPHQL;

$result = $graphql->query($query, $args);

if (isset($result['code'])) {
    http_response_code($result['code']);
}

echo json_encode($result);

GraphQLHelper.php

<?php

require_once('vendor/autoload.php');

use GuzzleHttp\Client;
use GuzzleHttp\Exception\ClientException;

/**
 * Helper class for GraphQL endpoint queries
 *
 * Class GraphQL
 * @package Xerberus\System\Helpers
 */
class GraphQLHelper
{
    /**
     * @var string
     */
    protected $endpoint;

    public function __construct($endpoint = 'https://graphql.anilist.co')
    {
        $this->endpoint = $endpoint;
    }

    public function getEndpoint()
    {
        return $this->endpoint;
    }

    public function query($query, $vars = [])
    {
        $client = new Client();
        $return = [];

        try {
            $response = $client->request('POST', $this->endpoint, [
                'headers' => [
                    'Content-Type' => 'application/json',
                ],
                'body'    => json_encode([
                    'query'     => $query,
                    'variables' => $vars
                ]),
            ]);

            $return = json_decode($response->getBody()->getContents(), true);
        } catch (ClientException $e) {
            $return['code'] = $e->getCode();
            $return['error'] = $e->getMessage();
        }

        return $return;
    }
}