Slim Interview Questions and Answers
Most Frequently Asked Slim Interview Questions
A PHP micro-framework, Slim helps the developers write easy yet powerful APIs and web applications. This framework provides a fast and robust router that can map route callbacks to various HTTP requests and URIs.It supports PSR-7 HTTP message implementation which allows the developers to assess and manipulate HTTP message method, status, headers, URI, body, and cookies.
Uses of Slim Framework
- A quick way to write powerful APIs and web applications
- Allows you to map functions with URLs and methods
- Allow you to modify requests and responses.
- Developers have control over dependencies using Dependency Injection
Slim and Silex are different because Slim is a micro framework, while Silex is a full-stack framework.
Slim and Silex are similar because they both help developers build web applications with simple tools for receiving a request and delivering a response.
|S.no||Laravel, Symfony, and Zend||Slim|
|1.||Full-stack frameworks||Micro framework|
|2.||Consist of individual components that do different tasks necessary for complex web apps.||A single component library that addresses the core of web apps.|
|3.||Come with overhead||Minimal overhead|
Slim 3.12.0 released on 15 Jan 2019
composer require slim/slim "^3.0"
This information has been asked quite a few times recently in Slim framework interview questions.
Features of Slim Framework
- Includes great routes - Route middleware, Route redirect, and Standard HTTP methods.
- Easy to solve and fix the errors
- AES-256 encryption secures the data and stores in cookies
- Possible to render external PHP files using template rendering
- Web server with URL rewriting
- PHP 5.5 or newer
In the Slim Framework, a hook is used to register a callback. Identified by string names, a hook is an instance at which the callables will get invoked as per the priority list assigned. It is possible to attach multiple callables to a single hook by using the hook() method.
A middleware is a kind of callable that accepts three types of arguments- PSR7 request object, a PSR7 response object, and next middleware. A middleware can do all types of functions with objects. However, a middleware MUST initiate next middleware and clear Response and Request objects as arguments.
If you are preparing for Slim interview, you can read our slim framework tutorial for in-depth knowledge.
In Slim Framework, dependency injection is a container for preparing, managing, and injecting application dependencies.
Each routing method in Slim Framework will accept a callback routine as the final argument. The last case may be any PHP callable.
By default, the framework allows three arguments - Request, Response, arguments.
An argument is a function that specifies the actions to be taken when a route is matched to a request. It includes values for the existing route’s specific placeholders.
Every HTTP request in the Slim Framework has a request method assigned. Here are some of the request methods:
Our most extensive Slim framework interview questions and answers can help developers crack any job interview.
$requestIP = $request->getServerParam('REMOTE_ADDR');
CORS or Cross-Origin Resource Sharing is a middleware that implements resource sharing across the origin. In Slim application, CORS is implemented through Access-Control-Allow-Origin header. The best way to enable CORS is by using the cors-middleware package.