Slim 5 Road Map

Status: Draft / Planning

Slim 5 Issues: https://github.com/slimphp/Slim/issues?q=is%3Aissue+is%3Aopen+label%3A%22Slim+5%22

Planning

• Collect feedback from the Slim community to identify pain points and desired features.
• Identify how new PHP 8 features can be integrated to enhance Slim 5

Changes

• Bring back the simplicity. Simplify App instantiation. The AppFactory should not be needed anymore.
• Dependency Injection (DI): Improve DI container integration. Require a PSR-11 package.
• Move ErrorMiddleware into a new package
• Ensure that route attributes are always in the Request #3280
• Unify CallableResolver and AdvancedCallableResolver #3073
• Resolving middleware breaks if resolver throws unexpected exception type #3071
• Forward logger to own ErrorHandlingMiddleware #2943

New Features

• Optimize middleware execution pipeline: Provide FIFO middleware support
• Provide integrated base path middleware
• Provide CallbackStream.

Dependencies

• Require >= PHP 8.2
• PSR-7 and PSR-15 compliance: Require at least psr/http-message 2.0.
• PSR-11 compliance: Require at least psr/container 2.0.
• PSR-3 compliance: Require at least psr/log 3.0

Documentation

• Update and expand the official documentation to cover new features and best practices.
• Provide updated tutorials and example applications to help developers get started with Slim 5.
• Add migration guide

Remove

• TBD

Testing

• Require PHPUnit 11.
• Optimize tests. Avoid mocking where possible.
• Use Mockery for all new tests which require mocking. Drop prophecy?

Final Release

• Release Candidate: Prepare and release the Slim 5 release candidate for final testing.
• Official Release: Launch Slim 5 with complete documentation and migration guides.

Minimal Slim 5 Example

Installation:

composer require slim/slim:5.*
composer require slim/psr7
composer require php-di/php-di

File: public/index.php

<?php

use Slim\App;

require __DIR__ . '/../vendor/autoload.php';

// Create App without AppFactory
// This will create the DI container instance internally
$app = new App();

// Add Routing Middleware
// This will add the new EndpointRoutingMiddleware and the new EndpointMiddleware
$app->addRoutingMiddleware();

// Add Exception Middleware
// This will add the new ExceptionHandlerMiddleware
$app->addExceptionHandlerMiddleware();

// Register Routes
$app->get('/', function ($request, $response, $args) {});

// Run the app
$app->run();