Slim is a PHP micro-framework that helps you quickly write simple yet powerful web applications and APIs.

Programming language: PHP
License: MIT License
Tags: Frameworks     Micro Frameworks     REST     Psr7    
Latest version: v4.10.0

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Slim Framework

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Slim is a PHP micro-framework that helps you quickly write simple yet powerful web applications and APIs.


It's recommended that you use Composer to install Slim.

$ composer require slim/slim

This will install Slim and all required dependencies. Slim requires PHP 7.4 or newer.

Choose a PSR-7 Implementation & ServerRequest Creator

Before you can get up and running with Slim you will need to choose a PSR-7 implementation that best fits your application. A few notable ones:

Slim-Http Decorators

Slim-Http is a set of decorators for any PSR-7 implementation that we recommend is used with Slim Framework. To install the Slim-Http library simply run the following command:

composer require slim/http

The ServerRequest and Response object decorators are automatically detected and applied by the internal factories. If you have installed Slim-Http and wish to turn off automatic object decoration then you can use the following statements:


use Slim\Factory\AppFactory;
use Slim\Factory\ServerRequestCreatorFactory;


$app = AppFactory::create();

// ...

Hello World using AppFactory with PSR-7 auto-detection

In order for auto-detection to work and enable you to use AppFactory::create() and App::run() without having to manually create a ServerRequest you need to install one of the following implementations:

Then create file public/index.php.

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Factory\AppFactory;

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

// Instantiate App
$app = AppFactory::create();

// Add error middleware
$app->addErrorMiddleware(true, true, true);

// Add routes
$app->get('/', function (Request $request, Response $response) {
    $response->getBody()->write('<a href="/hello/world">Try /hello/world</a>');
    return $response;

$app->get('/hello/{name}', function (Request $request, Response $response, $args) {
    $name = $args['name'];
    $response->getBody()->write("Hello, $name");
    return $response;


You may quickly test this using the built-in PHP server:

$ php -S localhost:8000 -t public

Going to http://localhost:8000/hello/world will now display "Hello, world".

For more information on how to configure your web server, see the Documentation.


To execute the test suite, you'll need to install all development dependencies.

$ git clone https://github.com/slimphp/Slim
$ composer install
$ composer test


Please see [CONTRIBUTING](CONTRIBUTING.md) for details.

Learn More

Learn more at these links:


If you discover security related issues, please email [email protected] instead of using the issue tracker.

For enterprise

Available as part of the Tidelift Subscription.

The maintainers of Slim and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more.


Code Contributors

This project exists thanks to all the people who contribute. [Contribute](CONTRIBUTING.md).

Financial Contributors

Become a financial contributor and help us sustain our community. Contribute



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The Slim Framework is licensed under the MIT license. See [License File](LICENSE.md) for more information.

*Note that all licence references and agreements mentioned in the Slim Framework README section above are relevant to that project's source code only.