PHP PHP 5

Question 1

Which PHP function splits a string into an array based on a delimiter?

Accepted Answer

explode()

Answer

explode() splits a string by a given delimiter string and returns an array of substrings.

Question 2

What does the PHP spread operator ... do when used in a function call?

Accepted Answer

Unpacks an array or traversable into individual arguments

Answer

The ... spread operator unpacks an iterable into individual arguments when calling a function.

Question 3

Which of the following PHP functions checks whether a variable is an array?

Accepted Answer

is_array()

Answer

is_array() returns true if the variable is of type array, and false otherwise.

Question 4

In PHP, what is a trait primarily used for?

Accepted Answer

To enable multiple inheritance by sharing methods across classes

Answer

Traits allow code reuse across class hierarchies in PHP's single-inheritance model by defining methods that can be mixed into any class.

Question 5

What HTTP status code does PHP's header('Location: /page') redirect produce by default?

Accepted Answer

302

Answer

A Location redirect via PHP's header() defaults to a 302 Found (temporary redirect) status code.

PHP - PHP Programming Language Practice Test