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PHP Interview Questions

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21.

What are the main principles of OOP in PHP?

intermediate

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22.

Explain the difference between abstract classes and interfaces.

intermediate

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23.

What are PHP traits and when would you use them?

intermediate

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24.

What are magic methods in PHP?

intermediate

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25.

Explain late static binding in PHP.

intermediate

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26.

What are PHP namespaces and why are they important?

intermediate

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27.

What's the difference between indexed and associative arrays?

intermediate

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28.

What are the differences between array_map(), array_filter(), and array_reduce()?

intermediate

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29.

How do you check if a key exists in an array?

intermediate

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30.

Explain the difference between errors and exceptions in PHP.

intermediate

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31.

How do you create and handle custom exceptions?

intermediate

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32.

What is the finally block and when is it executed?

intermediate

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33.

What is PDO and what are its advantages over MySQLi?

intermediate

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34.

What are prepared statements and why are they important?

intermediate

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35.

Explain database transactions in PHP.

intermediate

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36.

What is the N+1 query problem and how do you solve it?

intermediate

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37.

What's the difference between sessions and cookies?

intermediate

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38.

How do you implement secure session management?

intermediate

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39.

What is session fixation and how do you prevent it?

intermediate

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40.

What is SQL injection and how do you prevent it?

intermediate

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Showing 21 to 40 of 78 results

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