Last Updated: January 23, 2020
· entomb

Create a JSON RESTfull API using Slim framework

Using Slim you can create easy RESTfull websites and API's in seconds, using the simplest and fastest PHP framework.

If you want to create a JSON API in seconds, I've create a Slim extension to handdle json output.

1) set up a composer.json file

    "require": {
        "slim/slim": "2.*",
        "entomb/slim-json-api": "dev-master"

2) use $ composer install to fetch all the code. if you need help check this site:

3) create a index.php file loading and setting up Slim

require 'vendor/autoload.php';

$app = new \Slim\Slim();

$app->view(new \JsonApiView());
$app->add(new \JsonApiMiddleware());

4) start codding your API using $app->render(CODE, $DATA) to output information.

$app->get('/', function() use ($app) {
            'msg' => 'Welcome to my json API!',


   "msg":"Welcome to my json API!",

5 Responses
Add your response

With slim there are ways of creating optional parameters, that example would result in a route like this: /items(/:idParam)(/count)

I realy find Slim the most elegant PHP "router" (wouldn't really call it a framework).


over 1 year ago ·

Slim is a really cool router for PHP - but PHP is not a really cool and fast programming language, especially not for APIs because they need to be fast.

I prefer Node.js with the Express framework, which is providing the same functionality in mostly the same syntax but in really fast.

over 1 year ago ·

A few comments. We have created lots of API's both with Node.js and Express, but also in PHP with Slim.

Slim is nice for building RESTful JSON API's. I find Slim paired with an ORM makes for an awesome tool kit for coding API's quickly. Also I would take out the "status":200 and use HTTP Headers to make it true REST.

Great tip though, more people should check out Slim.

over 1 year ago ·

You should say about this line also:


As a beginner it wasted my 2hours.

over 1 year ago ·

Try to make your REST API compliant

over 1 year ago ·