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144 interview questions on PHPfor developers (2024)

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
22 votes1418 runs1 comment

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

Back-end developer
functions
errors
Vincent Cotroat Mar 24, 2023
Medium
8 votes1128 runs
5 comments

PHP code that throws an error.

Back-end developer
php
errors
Anonymous authorat Jan 4, 2022
Hard
7 votes2043 runs0 comment

Which of the following statements are true ?

Back-end developer
functions
variables
Théoat Mar 28, 2022
Hard
6 votes2086 runs2 comments

What type of array is the following?

Back-end developer
arrays
multidimensional
bidimensional
Théoat Mar 28, 2022
Medium
6 votes2036 runs3 comments

Which of the following statements are true ?

Back-end developer
php
arrays
Théoat Mar 28, 2022
Medium
5 votes1685 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
Medium
4 votes2122 runs0 comment

What is the value of the `PHP_FLOAT_MIN` variable?

Back-end developer
constants
float
Théoat Mar 28, 2022
Hard
4 votes1098 runs0 comment

Which of these PHP code snippets are valid?

Back-end developer
php
namespace
Julien Breuxat Dec 16, 2021
Medium
4 votes1040 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
Medium
4 votes957 runs2 comments

PHP function with named and positional arguments.

Back-end developer
php
arrays
functions
Anonymous authorat Aug 26, 2024
Hard
3 votes1928 runs0 comment

Usage of the spaceship operator in a PHP loop.

Back-end developer
comparison
operators
Théoat Mar 28, 2022
Medium
3 votes1821 runs0 comment

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

Back-end developer
ternary operator
strings
Théoat Mar 28, 2022
Hard
3 votes1534 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
3 votes1366 runs0 comment

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

Back-end developer
arrays
functions
Nick LAM YEE MANat Mar 28, 2023
Hard
3 votes1133 runs1 comment

What will this code display?

Back-end developer
php
null
empty
Julien Breuxat Dec 3, 2021
Medium
3 votes1114 runs0 comment

Display the first element of an array in PHP

Back-end developer
arrays
associative arrays
Julien Breuxat Dec 2, 2021
Hard
3 votes1086 runs4 comments

PHP code that throws a TypeError

Back-end developer
null
type-hinting
Anonymous authorat Mar 14, 2023
Medium
3 votes1043 runs2 comments

Use the match expression in PHP to print a string.

Back-end developer
match
default
Anonymous authorat Jan 4, 2022
Medium
3 votes974 runs0 comment

Check if a value is in an array in PHP

Back-end developer
arrays
strings
Anonymous authorat Jan 4, 2022
Easy
3 votes972 runs0 comment

Which function signature is valid?

Back-end developer
functions
types
Clément Devos (W3D Team)at Jan 4, 2022
PHP tests