Slim Framework Interview Questions

Slim Framework Interview Questions | Freshers & Experienced

  • Sharad Jaiswal
  • 07th Dec, 2021
  • 428 Followers

About Slim Framework

Slim Framework is a micro PHP framework designed to make the work of programmers easy. It lets you fast and easily develop simple codes which are quite robust in nature for the development of web-based programs and applications. Also, the development of the application programming interface is very easy using the Slim Framework.

Key Features of Slim Framework

Below are few major features of Slim Framework

HTTP Router

Middleware

PSR-7 Support

Dependency Injection

Practice Best Slim Framework Interview Questions & Answers;

Q1. What is Slim framework?

Slim is a micro-framework written in PHP scripting language, that helps programmers to create simple yet powerful web applications and APIs. It is basically a dispatcher that receives an HTTP request, invokes an appropriate callback routine, and returns an HTTP response.

Q2. How would you define a middleware in Slim?

In the Slim Framework, a Middleware acts as concentric layers surrounding your core application. It is used to implement a version of the Rack protocol, such that, a Slim application can have middleware that may inspect, analyze, or modify the application environment, request, and respond before or after the Slim application is invoked.

Q3. How can you install Slim Framework v2?

You can install Slim Framework v2 with the help of the following steps:

  • Download and extract the Slim Framework ZIP archive.
  • Copy the Slim/ directory into your project.
  • Require the Slim class in your application's index. php file.
  • Register Slim's built-in autoloader with \Slim\Slim::registerAutoloader() .

Q4. What kind of applications you create in slim Framework.

Slim Framework helps to create simple, fast, and powerful web applications and APIs in a quick manner. It has also had features to create REST applications. REST is an abbreviation for Representational State Transfer. It provides a larger codebase, kitchen-sink functionality, and a larger learning curve.

Q5. Is Slim is better than Silex?

Slim and Silex both are very useful and important PHP frameworks for routing our REST APIs on our Apache/PHP/MySQL Server. There is a very narrow difference between them that is Silex has probably a bigger community because it came from Symfony whereas the documentation is far better in Slim.

Q6. Who is the creater of Slim?

Josh Lockhart is known as the creator of the Slim PHP framework. He has written the Slim Framework which is a popular PHP micro-framework, open-sourced on GitHub. He is also recognized for creating and curating PHP The Right Way, a very popular movement in the PHP community to help developers learn modern-day best practices and coding standards.

Q7. How can you configure Slim with Doctrine?

You can configure Slim with Doctrine by following the given steps:

  • Adding Doctrine to your application. 
  • Provide database credentials. 
  • Define the EntityManager service. 
  • Create the Doctrine console. 
  • Using the EntityManager in our own code. 
  • Other resources.

Q8. How to set charset for DB in slim framework?

You can set the charset for DB in a slim framework by using a database ORM such as Eloquent to connect your SlimPHP application to a database. Syntax - composer require illuminate/database "~5.1"

Q9. How can you set and get a cookie in Slim Framework?

Set and Get is an important aspect used to set and get a cookie in Slim Framework. Along with the HTTP request currently made, automatically there is parsing done of the cookies. A subsequent request needs to be made along to see the cookie along with the current request. \Slim\Http\Request object is also used to set and get the cookies. Cookies values are fetched with the getcookie() of the Slim application.

  • $app = new \Slim\Slim();
  • $foo = $app->getCookie('foo');

 

Q10. How to define route groups in Slim Framework?

Slim Framework uses route groups for sharing the route attributes, like middleware or even URL segments. You can define route groups in Slim Framework with the help of the following code given below.

$app->group('/user', function () use ($app) {

  $app->get('/profile/:id', function ($id) {

        });
$app->get('/posts/:id', function ($id) {

        });

}

Q11. Enlist some Environment Variables available in Slim Framework?

Some of the important Environment Variables available in Slim Framework are:

Request_Method – This is the HTTP request method and is particularly required and cannot be empty.

Script_Name – The request URI’s path of which the initial portion relates to the particular physical directory in which the installation of the Slim application is done.

Query_String – It does not include the ‘?’ of the HTTP Request’s URI.

Server_Name – After combining with Script_Name and Path_Info it can be conveniently used to make a completely qualified URL to an application resource. 

Server_Port – After combining with Script_Name and Path_Info, it can be castoff to produce a fully qualified URL to any of the application resources.

 

Q12. What is a hook in Slim Framework?

In the Slim framework, a hook can be defined as a moment in the Slim application lifecycle at which a priority list of callables assigned to the hook will be invoked. It can be identified by a string name. Hooks are basically a function in the Slim framework that is used/ register as callbacks.

Q13. How to enable CORS in Slim Framework?

You can enable CORS in Slim Framework by adding the following header to its response:
Access-Control-Allow-Origin: , ... | *
The code to enable core is:

$app->options('/{routes:.+}', function ($request, $response, $args) {
    return $response;
});
$app->add(function ($req, $res, $next) {
    $response = $next($req, $res);
    return $response
            ->withHeader('Access-Control-Allow-Origin', 'http://mysite')
            ->withHeader('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type, Accept, Origin, Authorization')
            ->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, PATCH, OPTIONS');
});

Q14. How to get remote IP address in Slim Framework?

You can get a remote IP address in Slim Framework via middleware using a component such as IP-address-middleware. It can be installed via composer: composer requires akrabat/ip-address-middleware. The middleware stores the client’s IP address in a request attribute, so access is via $request->getAttribute('ip_address')

Q15. Enlist the HTTP Method available for route in Slim Framework?

Some of the HTTP Methods available in Slim Framework are as follows:

GET Route - You can add a route that handles only GET HTTP requests with the Slim application’s get() method.

POST Route - You can add a route that handles only POST HTTP requests with the Slim application’s post() method.

PUT Route - You can add a route that handles only PUT HTTP requests with the Slim application’s put() method. 

DELETE Route - You can add a route that handles only DELETE HTTP requests with the Slim application’s delete() method.

OPTIONS Route - You can add a route that handles only OPTIONS HTTP requests with the Slim application’s options() method.

PATCH Route - You can add a route that handles only PATCH HTTP requests with the Slim application’s patch() method. 

Any Route - You can add a route that handles all HTTP request methods with the Slim application’s any() method.

Custom Route - You can add a route that handles multiple HTTP request methods with the Slim application’s map() method. 

 

About Author :

  • Author of Slim Framework Interview Questions

    Sharad Jaiswal

    My name is Sharad Jaiswal, and I am the founder of Conax web Solutions. My tech stacks are PHP, NodeJS, Angular, React. I love to write technical articles and programming blogs.

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