dependencies.php

<?php
declare(strict_types=1);

use DI\ContainerBuilder;
use Monolog\Handler\StreamHandler;
use Monolog\Logger;
use Monolog\Processor\UidProcessor;
use Psr\Container\ContainerInterface;
use Psr\Log\LoggerInterface;

return function (ContainerBuilder $containerBuilder) {
    $containerBuilder->addDefinitions([
        LoggerInterface::class => function (ContainerInterface $c) {
            $settings = $c->get('settings');

            $loggerSettings = $settings['logger'];
            $logger = new Logger($loggerSettings['name']);

            $processor = new UidProcessor();
            $logger->pushProcessor($processor);

            $handler = new StreamHandler($loggerSettings['path'], $loggerSettings['level']);
            $logger->pushHandler($handler);

            return $logger;
        },

        // database
        PDO::class => function (ContainerInterface $c) {
            $settings = $c->get('settings')['db'];
            $server = $settings['driver'].":host=".$settings['host'].";dbname=".$settings['dbname'];
            $conn = new PDO($server, $settings['user'], $settings['pass'], array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8"));
            $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            $conn->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);

            return $conn;
        }
    ]);
};

routes.php

<?php
declare(strict_types=1);

use App\Application\Actions\User\ListUsersAction;
use App\Application\Actions\User\ViewUserAction;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\App;
use Slim\Interfaces\RouteCollectorProxyInterface as Group;

return function (App $app) {
    $container = $app->getContainer();

    $app->get('/', function (Request $request, Response $response) {
        $response->getBody()->write('Hello world!');
        return $response;
    });

    $app->group('/users', function (Group $group) use ($container) {
        $group->get('', ListUsersAction::class);
        $group->get('/{id}', ViewUserAction::class);
    });

    $app->get('/buku', function (Request $request, Response $response) {
        $sql = 'SELECT * FROM buku';
        $db = $this->get(PDO::class);

        $stmt = $db->prepare($sql);
        $stmt->execute();
        $result = $stmt->fetchAll(PDO::FETCH_ASSOC);

        $payload = json_encode([
            'status' => 'success',
            'data' => $result
        ]);

        $response->getBody()->write($payload);

        return $response
                ->withHeader('Content-Type', 'application/json')
                ->withStatus(201);
    });
};

settings.php

<?php
declare(strict_types=1);

use DI\ContainerBuilder;
use Monolog\Logger;

return function (ContainerBuilder $containerBuilder) {
    // Global Settings Object
    $containerBuilder->addDefinitions([
        'settings' => [
            'displayErrorDetails' => true, // Should be set to false in production
            'logger' => [
                'name' => 'slim-app',
                'path' => isset($_ENV['docker']) ? 'php://stdout' : __DIR__ . '/../logs/app.log',
                'level' => Logger::DEBUG,
            ],
            'db' => [
                'host' => 'localhost',
                'user' => 'root',
                'pass' => '',
                'dbname' => 'perpusceritanya',
                'driver' => 'mysql'
            ],
        ],
    ]);
};