Default route arguments in Slim

A friend of mine recently asked how to do default route arguments and route specific configuration in Slim, so I thought I'd write up how to do it. Consider a simple Hello route: $app->get("/hello[/{name}]", function ($request, $response, $args) { $name = $request->getAttribute('name'); return $response->write("Hello $name"); }) This will display "Hello " for the URL /hello and "Hello Rob" for the URL /hello/Rob. If we wanted a default of "World", we can set an argument on… continue reading.

Posted on 14 June 2017 in Slim Framework, Slim Framework 3

Slim's route cache file

When you have a lot of routes, that have parameters, consider using the router's cache file to speed up performance. To do this, you set the routerCacheFile setting to a valid file name. The next time the app is run, then the file is created which contains an associative array with data that means that the router doesn't need to recompile the regular expressions that it uses. For example: $config = [ 'settings' => [… continue reading.

Posted on 31 May 2017 in PHP, Slim Framework, Slim Framework 3

Stand-alone usage of Zend-InputFilter

Any data that you receive needs to be checked and validated. There are number of ways to do this including PHP's filter_var, but I prefer Zend-InputFilter. This is how to use it as a stand-alone component. Installation Firstly, we install it using Composer: $ composer require zendframework/zend-inputfilter $ composer require zendframework/zend-servicemanager You don't have to have ServiceManager, but it makes working with InputFilter much easier, so it's worth installing. Create the InputFilter The easiest way… continue reading.

Posted on 15 February 2017 in PHP, Slim Framework, Slim Framework 3

Rendering problem details in Slim

As I've already noted, in the project I'm currently building, I'm rendering errors in my Slim Framework API using RFC 7807: Problem Details for HTTP APIs via Larry Garfield's ApiProblem component and rka-content-type-renderer. One place where we need to integrate this approach into Slim is in the error handlers. Let's look at NotFound. To ensure that we return a response in the right format, we need to implement our own NotFound handler: src/App/Handler/NotFound.php: <?php namespace… continue reading.

Posted on 8 February 2017 in PHP, Slim Framework, Slim Framework 3

Handling JSON data errors in Slim 3

When you send JSON data into a Slim Framework application with a content-type of application/json, then Slim will decode it for you if you use getParsedBody(): $app->post("/", function ($request, $response, $args) { $input = $request->getParsedBody(); var_dump($input);exit; }); Using curl to test: $ curl -H "Content-Type: application/json" http://localhost:8888 -d '{"foo": "bar"}' array(1) { 'foo' => string(3) "bar" } If there's an error however, you get this: $ curl -H "Content-Type: application/json" http://localhost:8888 -d '{foo: bar}' NULL… continue reading.

Posted on 16 November 2016 in Slim Framework, Slim Framework 3

Checklist for releasing Slim

Release process for Slim so that I don't forget any steps; based on a check list created by Asgrim. I should probably automate some of this! Preparation: Ensure all merged PRs have been associated to the tag we're about to release.Find them via this search: [is:pr is:closed no:milestone is:merged]. Close the milestone on GitHub. Create a new milestone for the next patch release. Ensure that you have the latest master & that your index is… continue reading.

Posted on 28 July 2016 in PHP, Slim Framework, Slim Framework 3

Filtering the PSR-7 body in middleware

Sometimes, there's a requirement to alter the data in the Response's body after it has been created by your controller action. For example, we may want to ensure that our brand name is consistently capitalised. One way to do this is to create middleware that looks like this: $brandFilter = function ($request, $response, $next) { // call next middleware $response = $next($request, $response); $content = (string)$response->getBody(); $newContent = str_ireplace('nineteen feet', 'Nineteen Feet', $content); $response->getBody()->rewind(); $response->getBody()->write($newContent);… continue reading.

Posted on 15 May 2016 in PHP, Slim Framework, Slim Framework 3

Slim 3.4.0 now provides PSR-7!

I've been neglecting Slim's PR queue recently, so this weekend I dedicated a lot of time to merging all the good work that our contributors have done. As a result, I'm delighted to release version 3.4.0! This release has a larger set of changes in it than I would have ideally liked which is a direct consequence of having gone two months between releases rather than one. One particularly interesting addition that we have a… continue reading.

Posted on 9 May 2016 in PHP, Slim Framework, Slim Framework 3

DI Factories for Slim controllers

When using classes for route actions in Slim 3, I recommend using a single class for each route. However you can use a single class for multiple routes. To register a class method to a route you pass a string as the route callable where the class name is separate from method by a colon like this: $app->get('/list', 'MyController:listAction'); Slim will retrieve MyController from the DI container and then call the listAction method using the… continue reading.

Posted on 28 April 2016 in Slim Framework, Slim Framework 3

Overriding Slim 3's error handling

Slim 3 registers two error handers: errorHandler to trap PHP Exceptions phpErrorHandler to trap PHP 7 Errors This means that if you want to override the default error handlers, you need to override both error handlers with your own code. Each error handler is a callable. The signatures are: errorHandler: function ($request, $response, $exception) phpErrorHandler: function ($request, $response, $error) To override a error handler, simply register a new callable with the Container: $container = $app->getContainer();… continue reading.

Posted on 13 April 2016 in PHP, Slim Framework, Slim Framework 3

Category: Slim Framework