website/public/API/graphql.php

<?php
use GraphQL\Server\StandardServer;
use GraphQL\Type\Schema;
use GraphQL\Error\DebugFlag;

require 'vendor/autoload.php';
require "./lib/config.php";
require "./lib/mysql.php";
require "./queries/queries.php";

$schema = new Schema([
    'query' => $queryType,
    'mutation' => $mutationType,
]);

try {
    $serverConfig = [
        'schema' => $schema,
        'rootValue' => [
            'db' =>$conn,
        ],
        'debugFlag' => DebugFlag::INCLUDE_DEBUG_MESSAGE | DebugFlag::INCLUDE_TRACE,
    ];
    $server = new StandardServer($serverConfig);

    $server->handleRequest();
} catch (Throwable $error) {
    StandardServer::send500Error($error);
}