PHP Programming Interview Questions


PHP Programming Interview Questions

PHP Programming Interview Questions

PHP is one of the most widely used programming languages in the world. It’s an open-source language that’s used by developers to create dynamic web applications and websites. If you’re a developer looking to work with PHP, it’s essential to prepare for a PHP programming interview. In this article, we’ll explore some of the most common PHP programming interview questions.

What is PHP, and what are its uses?

This is a basic question that most interviewers will ask. PHP stands for Hypertext Preprocessor and is a server-side scripting language. It’s used to create dynamic web pages, e-commerce websites, and web-based applications.

What are the differences between GET and POST methods in PHP?

GET and POST methods are used to send data from the client-side to the server-side. GET method sends data in the URL’s query string, while POST sends data in the request’s body. The GET method is used for retrieving data from the server, while the POST method is used for sending data to the server for processing.

What is the difference between include and require in PHP?

Both include and require are used to include files in PHP. The main difference between the two is that require will cause a fatal error if the file cannot be found, while include will only issue a warning.

What are the differences between echo and print in PHP?

Echo and print are both used to output data in PHP. The main difference is that echo can output multiple strings, while print can only output one string. Additionally, echo is slightly faster than print.

What are PHP sessions, and how are they used?

PHP sessions are used to store information about a user between different requests. A session starts when a user logs in to a website, and it ends when the user logs out or when the session times out. Sessions are used to store user-specific data, such as login credentials, shopping cart contents, and preferences.

What is PHP’s autoloading feature, and how is it used?

Autoloading is a feature in PHP that automatically loads classes and interfaces when they are needed. This feature saves developers from having to manually include classes in their code. To use autoloading, developers need to define a function that maps class names to file paths.

What is the difference between a cookie and a session in PHP?

Both cookies and sessions are used to store data about a user on the client-side. The main difference is that cookies are stored on the client-side, while sessions are stored on the server-side. Additionally, cookies have an expiration time, while sessions last until the user logs out or until the session times out.


These are just a few of the many PHP programming interview questions you may encounter in an interview. Preparing for an interview by studying common PHP interview questions and their answers is essential to making a good impression and landing your dream job. Remember to stay calm and confident during the interview, and showcase your PHP programming skills to the best of your ability.

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