Top Codeigniter Interview Questions
CodeIgniter is one of the most popular PHP frameworks. Hiring CodeIgniter developers is always tricky, and it can be difficult to know what questions to ask them in order to make sure they’re the right fit for your team.
This list of CodeIgniter interview questions will help you determine whether a candidate has the skills and the personality to make their employment worthwhile. In this article, we cover some basic CodeIgniter interview questions that you should know before you begin the hiring process.
CodeIgniter Interview Questions -
What do you know about CodeIgniter?
CodeIgniter is a powerful open-source PHP web application framework with a very small footprint, built for developers who need a simple and elegant toolkit to create full-featured web applications.
CodeIgniter enables developers to create websites and apps quickly by providing a rich set of libraries for various functions, including database access, form validation, authentication, and user management. It uses an MVC pattern that follows convention over configuration which means it requires less code than other frameworks.
What are some features of CodeIgniter?
- Model-View-Controller architecture
- Lightweight
- Full-Featured database classes
- Support for several platforms
- Query Builder Database Support
- Form and Data Validation
- Security and XSS Filtering
- Session Management
- Email Sending Class
What is the database management system in CodeIgniter? How does it work?
Database Management System (DBMS) is a software system designed to let you store, retrieve, and update data in a database. It provides methods to create, read, update and delete records in any number of tables that make up your database. CodeIgniter comes with an embedded DBMS called SQLite which you will use for all your data manipulation needs.
List the databases that support CodeIgniter?
CodeIgniter PHP framework supports different databases that include -
- MySQL
- Oracle
- PostgreSQL
- Open Database Connectivity (ODBC)
- Firebird
What are hooks in CodeIgniter?
CodeIgniter hooks are points in your application where you can attach custom functions. These functions are executed before and after various database, controller, and model events. Hooks allow you to run extra code at those times, which gives you more flexibility to develop your application as needed. Since version 4.0, CodeIgniter includes a simple but complete user management system that enables administrators to manage users and roles from a web interface.
What is routing in CodeIgniter?
CodeIgniter’s routing system works a little differently than other frameworks. It is defined in a unique way and is contained within two files: router.php and application_top.php. The router class takes in an array as its constructor parameter, which can be used to define certain routes for your application.
This array should consist of an associative key and value pair, which are known as route markers or route parameters for any given route. There are three types of route parameters that you can use in your application; these are GET, POST, and COOKIE. Each marker should correspond with a specific marker type on your URL.
Why CodeIgniter is known a loosely based MVC framework?
CodeIgniter is called a loosely based MVC framework because developers are not bound to a Model and Views. This is what differentiates CodeIgniter from other frameworks like Yii or Ruby on Rails. The controller is the necessary element, but Model and Views are not mandatory. You can define your own structure for the view files and even use them as needed instead of sticking to the default ones that come with CodeIgniter.
What is CSRF token in CodeIgniter? How to set CSRF token?
A CSRF token is a unique, random string of characters used to verify that requests are made by an authorized user. You can add code to your controller which checks for a CSRF token, and won’t allow access if it doesn’t have one. The logic should go something like: $this->input->post(‘csrf_token’); if (!$this->input->post(‘csrf_token’))
List down the different types of hook points in Codeigniter?
Here are different types of hook points in Codeigniter
- post_controller_constructor
- pre_controller
- post_system
- pre_system
- cache_override
- display_override
- Post_controller
What is the security parameter in CodeIgniter?
CodeIgniter comes with a bunch of security tools that protect your application from malicious attacks. These tools protect solutions from SQL injections, cross-site scripting (XSS), remote file inclusion (RFI), and other types of attacks.
All tools also provide an easy way to sanitize user input, so it’s best to take advantage of them. Make sure you follow all CodeIgniter security best practices as soon as possible after deploying your application.
Conclusion
CodeIgniter is an open-source web application framework that is used by many people in the world. However, it is not enough to have the knowledge on CodeIgniter you also need to hire a CodeIgniter developer so that they can fix your coding issues and create custom features that you need. We hope these important questions will help you hire top CodeIgniter developer.
