What is PHP?

  • Purpose: Assess your basic understanding of PHP and its purpose in web development.

2. What are the key features of PHP?

  • Purpose: To gauge your knowledge of PHP's strengths, such as server-side scripting, cross-platform compatibility, and database integration.

3. Explain the difference between == and === in PHP.

  • Purpose: Understand your grasp of type comparison in PHP. == checks for value equality, while === checks for both value and type equality.

4. What are PHP data types?

  • Purpose: Evaluate your understanding of the different data types in PHP: integers, floats, strings, booleans, arrays, objects, and NULL.

5. What are superglobals in PHP?

  • Purpose: Assess your knowledge of built-in global arrays like $_GET, $_POST, $_SESSION, $_COOKIE, $_FILES, and $_SERVER.

6. How does error handling work in PHP?

  • Purpose: To see if you know about error reporting levels, try-catch blocks, and custom error handling using set_error_handler().

7. What is the difference between include and require?

  • Purpose: Understand your knowledge of file inclusion. include produces a warning if the file is not found, while require produces a fatal error.

8. What are prepared statements and why are they important?

  • Purpose: To assess your understanding of SQL injection prevention and the benefits of using prepared statements for database interactions.

9. Explain the MVC architecture.

  • Purpose: Test your knowledge of design patterns, specifically Model-View-Controller, which is common in PHP frameworks.

10. What are namespaces in PHP?

  • Purpose: To evaluate your understanding of how namespaces help organize code and prevent naming conflicts.

11. What are traits, and how do they differ from classes?

  • Purpose: To see if you understand how traits facilitate code reuse in PHP without the limitations of single inheritance.

12. Explain the difference between GET and POST methods in HTTP.

  • Purpose: Assess your understanding of HTTP methods and their implications for data transmission.

13. How do you connect to a MySQL database in PHP?

  • Purpose: To evaluate your knowledge of database interaction, possibly including MySQLi or PDO.

14. What is Composer, and how do you use it?

  • Purpose: Assess your knowledge of dependency management in PHP and how Composer helps manage libraries and packages.

15. Can you explain what an autoloader is?

  • Purpose: To test your understanding of how PHP can automatically load class files, typically using the spl_autoload_register() function.

16. What are the differences between static and instance methods/properties?

  • Purpose: Assess your understanding of how static methods and properties belong to the class itself rather than instances of the class.

17. What is dependency injection?

  • Purpose: To gauge your understanding of design principles that enhance code modularity and testability.

18. How do sessions work in PHP?

  • Purpose: Assess your knowledge of managing user sessions and maintaining state across multiple requests.

19. Explain how you can secure a PHP application.

  • Purpose: To understand your approach to security best practices, including input validation, output sanitization, and using HTTPS.

20. Can you explain the difference between procedural and object-oriented programming in PHP?

  • Purpose: To assess your understanding of different programming paradigms and when to use each.

Conclusion

These questions cover a wide range of topics, from basic PHP knowledge to more advanced concepts. Preparing thoughtful answers and being able to demonstrate your coding skills through practical examples will help you stand out in an interview. Good luck!

 

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