Setting HTTP status code based on Exception in Slim 4

One thing that's quite convenient is to be able to throw an exception with a valid HTTP code set and have that code sent to the client. For example, you may have: throw new \RuntimeException("Not Found", 404); With the standard Slim 4 error handler, this response is sent to the client: $ curl -i -H "Accept:application/json" http://localhost:8888 HTTP/1.1 500 Internal Server Error Host: localhost:8888 Content-type: application/json { "message": "Slim Application Error" } Ideally we want… continue reading.

Posted on 19 July 2021 in PHP, Slim Framework, Slim Framework 4

Routing in Slim 4

Routing in Slim 4 works pretty much exactly the same as in Slim 3. They are used to map a URL that the browser requests to a specific handler that executes the code for that particular page or API endpoint. You can also attach middleware that will only be run when that route is matched. The route in the slim4-starter looks like this: $app->get('/[{name}]', HomePageHandler::class); It is made up of the method, the pattern and… continue reading.

Posted on 18 December 2019 in PHP, Slim Framework 4

Custom error rendering in Slim 4

One of the nice things about Slim 4 is that it's easier to customise the HTML generated on error without having to worry about the rest of the error handling mechanism. This is because we have separated error rendering from error handling. Slim's default ErrorHandler maintains a list of renderers, one for each content-type and will delegate the creation of the error payload (HTML, JSON, XML, etc) to the renderer. Out of the Box, the… continue reading.

Posted on 16 October 2019 in PHP, Slim Framework, Slim Framework 4

Dependency Injection in Slim 4

In contrast with Slim 2 and Slim 3, Slim 4 does not ship with a DI container, but instead, supports any PSR-11 compatibly DI container that you provide. This is part of Slim 4's commitment to interoperability via the PHP-FIG standards. The easiest way to add a container to your Slim application is to call AppFactory::setContainer() before you call AppFactory::create(). The setContainer() method expects any PSR-11 container. Register the container with Slim Let's look at… continue reading.

Posted on 2 October 2019 in PHP, Slim Framework, Slim Framework 4

Running Slim 4 in a subdirectory

If you want to run Slim 4 in a subdirectory of your website, then you have a few things you need to do. Let's consider the situation: Your main website is in the directory /var/www/html and is accessed at https://example.com/. You want your new Slim 4 app to be in the directory /var/www/html/myapp and to be accessed at https://example.com/myapp. Your Slim 4 index.php file is stored in /var/www/html/myapp. There are two things you need to… continue reading.

Posted on 26 September 2019 in PHP, Slim Framework, Slim Framework 4

Slim4-empty: minimal Slim 4 starting point

To simplify creating a new Slim 4 project, I've created slim4-empty which does this for me. To use it: $ composer create-project akrabat/slim4-empty my-new-project and you're done! The my-new-project directory is created and contains Slim 4 along with a minimally viable public/index.php to get you going. You can then run it with the PHP built-in server: php -S 0.0.0.0:8888 -t public/ And navigate to https://localhost:8888 to view "Hello World" in your browser. What does it… continue reading.

Posted on 11 September 2019 in PHP, Slim Framework, Slim Framework 4

Receiving input into a Slim 4 application

A Slim 4 (and Slim 3) application receives data from three places: Any query parameters on the URL (the key-value pairs after the ?) The HTTP message's body (usually for POST and PUT) messages Parameters in the URL (such as the 3 in https://example.com/users/3 Within the application, these are available within the PSR-7 Request object. Let's start with a simple Slim 4 application. Firstly we require the Slim framework and a PSR-7 implementation: $ composer… continue reading.

Posted on 4 September 2019 in PHP, Slim Framework, Slim Framework 4

A first look at Slim 4

With Slim 4 we have continued the tradition of allowing you to use the framework in the way that best fits you and your project. You can create a Slim application entirely in a single file suitable for prototyping through to a few files for a simple web hook or serverless action all the way to fully-decoupled application suitable for the enterprise. From my point of view, the big changes with Slim 4 are: Support… continue reading.

Posted on 21 August 2019 in Slim Framework, Slim Framework 4

Slim 4 Cyclomatic Complexity

There's not much wrong with Slim 3; lots of people are using it very successfully producing APIs and websites of all kinds. For Slim 4 the main goals have been to support PSR-15, make it easier to use your own PSR-7 implementation, improve error handling and remove assumptions that look magical if you don't know they are there. The latter one is the most important to me, personally! Secondarily, Pierre has concentrated on making Slim's… continue reading.

Posted on 3 April 2019 in PHP, Slim Framework, Slim Framework 4

Route specific configuration in Slim

Note: This article was updated on 14 October 2019 to cover Slim 4 in additional to Slim 3. A friend emailed me recently asking about route specific configuration in Slim. He wants to be able to set properties when creating the route that he can pick up when the route is matched. The way to do this is using route arguments. I've written about route arguments before in the context of setting default values for… continue reading.

Posted on 12 December 2018 in PHP, Slim Framework, Slim Framework 3, Slim Framework 4

Category: Slim Framework 4