Slim Interview Questions and Answers

By Umesh Singh
Last update: 22 Dec 2019, 20 Questions
Slim Interview Questions

Most Frequently Asked Slim Interview Questions

1. What is Slim framework and why it is used?

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
2. Is Slim framework similar to Silex and how do they differ?

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.

3. How to Slim framework different from other frameworks like Zend, Laravel, Symfony? Explain
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
6. What are the features of Slim Framework?

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
9. What is Hook in Slim Framework and how it is used?

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.

10. What do you mean by middleware in Slim Framework?

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.

11. What is Dependency Injection in Slim Framework?

In Slim Framework, dependency injection is a container for preparing, managing, and injecting application dependencies.

14. What is Route callbacks and explain its arguments?

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.

16. What Request Method is available in Slim Framework? Explain

Every HTTP request in the Slim Framework has a request method assigned. Here are some of the request methods:

  • GET
  • POST
  • PUT
  • HEAD
17. How to get IP address of client machine in Slim Framework?

Our most extensive Slim framework interview questions and answers can help developers crack any job interview.

$requestIP = $request->getServerParam('REMOTE_ADDR');

18. What is CORS and how it is enabled in Slim Framework?

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.