Learn Slim - 1 Code Examples & CST Typing Practice Test
Slim is a lightweight PHP micro-framework designed for quickly building simple yet powerful web applications and APIs. It focuses on minimalism, flexibility, and performance, giving developers full control over application architecture without imposing heavy conventions.
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Learn SLIM with Real Code Examples
Updated Nov 27, 2025
Code Sample Descriptions
Slim Simple REST API
<?php
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Factory\AppFactory;
require __DIR__ . '/vendor/autoload.php';
$app = AppFactory::create();
// Sample in-memory data
$items = [];
$app->get('/items', function (Request $request, Response $response) use (&$items) {
$response->getBody()->write(json_encode($items));
return $response->withHeader('Content-Type', 'application/json');
});
$app->post('/items', function (Request $request, Response $response) use (&$items) {
$data = json_decode($request->getBody(), true);
$items[] = $data;
$response->getBody()->write(json_encode($data));
return $response->withHeader('Content-Type', 'application/json');
});
$app->run();
Demonstrates a simple Slim app with routes for listing and creating items, using minimal setup.
Frequently Asked Questions about Slim
What is Slim?
Slim is a lightweight PHP micro-framework designed for quickly building simple yet powerful web applications and APIs. It focuses on minimalism, flexibility, and performance, giving developers full control over application architecture without imposing heavy conventions.
What are the primary use cases for Slim?
RESTful API development. Single-page application (SPA) backends. Microservices. Prototyping lightweight web apps. Custom routing and middleware-driven applications
What are the strengths of Slim?
Lightweight and fast. Highly flexible and extensible. PSR compliance ensures interoperability with other PHP packages. Easy to learn and start with. Well-suited for APIs and microservices
What are the limitations of Slim?
Not a full-stack framework, so you must integrate ORM, templating, and auth yourself. Less opinionated, so requires architectural decisions from the developer. Smaller community compared to Laravel or Symfony. May need more boilerplate for large-scale applications. Limited built-in features compared to full-stack frameworks
How can I practice Slim typing speed?
CodeSpeedTest offers 1+ real Slim code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.