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48 interview questions on PHP - Fundamentalsfor developers (2025)

Test your technical skills before an interview of PHP - Fundamentals with 48 corrected questions. Beginner, Intermediate or Expert level.

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48 questions
Hard
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3 comments

What type of array is the following?

Back-end developer
arrays
multidimensional
bidimensional
Théoat Mar 28, 2022
Easy
8 votes2462 runs
6 comments
Hard
6 votes2331 runs
1 comment
Hard
5 votes2479 runs0 comment
Hard
5 votes2407 runs
1 comment
Medium
5 votes2180 runs0 comment
Medium
5 votes1742 runs0 comment
Medium
4 votes2188 runs0 comment
Medium
4 votes1698 runs0 comment
Medium
4 votes994 runs2 comments

Usage of the null coalescing operator in PHP

Back-end developer
ternary operator
null coalescing operator
Théoat Mar 28, 2022
Medium
3 votes2313 runs0 comment
Medium
3 votes2236 runs0 comment
Easy
2 votes2155 runs1 comment
Easy
2 votes1520 runs0 comment

Pass by reference in PHP

Back-end developer
functions
references
Théoat Mar 28, 2022
Hard
2 votes1402 runs0 comment