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144 interview questions on PHPfor developers (2025)

Test your technical skills before an interview of PHP with 144 corrected questions. Beginner, Intermediate or Expert level.

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144 questions
Easy
28 votes1776 runs1 comment

Explain the difference between the `include` and `require` functions in PHP.

Back-end developer
functions
errors
Vincent Cotroat Mar 24, 2023
Hard
9 votes2420 runs0 comment

Which of the following statements are true ?

Back-end developer
functions
variables
Théoat Mar 28, 2022
Medium
8 votes2384 runs
6 comments

Which of the following statements are true ?

Back-end developer
php
arrays
Théoat Mar 28, 2022
Medium
7 votes2500 runs0 comment

What is the value of the `PHP_FLOAT_MIN` variable?

Back-end developer
constants
float
Théoat Mar 28, 2022
Hard
7 votes2461 runs
3 comments

What type of array is the following?

Back-end developer
arrays
multidimensional
bidimensional
Théoat Mar 28, 2022
Medium
7 votes1887 runs0 comment

Write a PHP class with a constant and a public method that outputs the constant.

Back-end developer
constants
classes
Théoat Mar 28, 2022
Hard
7 votes1268 runs
6 comments

PHP code that throws an error.

Back-end developer
php
errors
Anonymous authorat Jan 4, 2022
Hard
5 votes2399 runs0 comment

What are the risks when running the following code ?

Back-end developer
security
xss
Théoat Mar 28, 2022
Hard
5 votes2329 runs
1 comment

Usage of the global scope in a PHP function.

Back-end developer
functions
variables
Théoat Mar 28, 2022
Hard
5 votes2258 runs
1 comment

Usage of the spaceship operator in a PHP loop.

Back-end developer
comparison
operators
Théoat Mar 28, 2022
Easy
5 votes2119 runs0 comment

Using the ternary operator to choose between two strings in PHP.

Back-end developer
ternary operator
strings
Théoat Mar 28, 2022
Medium
5 votes1673 runs0 comment

What is the `asort()` function for in PHP ?

Back-end developer
arrays
functions
Nick LAM YEE MANat Mar 28, 2023
Medium
5 votes1076 runs2 comments

PHP function with named and positional arguments.

Back-end developer
php
arrays
functions
Anonymous authorat Aug 26, 2024
Medium
4 votes2122 runs0 comment

Write a PHP function that adds two numbers and returns an integer.

Back-end developer
functions
types
Théoat Mar 28, 2022
Medium
4 votes1667 runs0 comment

How to count the number of occurences of a pattern in a string in PHP

Back-end developer
functions
regular expressions
Théoat Mar 28, 2022
Medium
4 votes1176 runs2 comments

Use the match expression in PHP to print a string.

Back-end developer
match
default
Anonymous authorat Jan 4, 2022
Medium
4 votes1164 runs2 comments

Is this function signature valid? ```php <?php interface Demo { public function bar(): ?mixed; } ```

Back-end developer
functions
interfaces
Anonymous authorat Jan 4, 2022
Hard
4 votes1163 runs
1 comment

Which of these PHP code snippets are valid?

Back-end developer
php
namespace
Julien Breuxat Dec 16, 2021
Medium
4 votes1067 runs0 comment

Attributes are metadata that can be added to classes, properties, constants or methods.

Back-end developer
attributes
metadata
Anonymous authorat Jan 4, 2022
Medium
4 votes977 runs2 comments

Usage of the null coalescing operator in PHP

Back-end developer
ternary operator
null coalescing operator
Théoat Mar 28, 2022
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