PHP PHP 2

Question 1

Which PHP function returns the number of elements in an array?

Accepted Answer

count()

Answer

count() returns the number of elements in an array or countable object.

Question 2

What does the null coalescing operator ?? do in PHP?

Accepted Answer

Returns the left operand if it is not null, otherwise the right operand

Answer

The ?? operator returns its left-hand operand if it exists and is not null; otherwise it returns its right-hand operand.

Question 3

Which superglobal in PHP contains data sent via an HTML form with method='POST'?

Accepted Answer

$_POST

Answer

$_POST is the superglobal array that holds key-value pairs submitted via HTTP POST.

Question 4

What is the output of: echo 10 % 3;

Accepted Answer

1

Answer

The modulo operator % returns the remainder of 10 divided by 3, which is 1.

Question 5

Which PHP function is used to include a file and generate a fatal error if the file is not found?

Accepted Answer

require()

Answer

require() halts script execution with a fatal E_COMPILE_ERROR if the file cannot be found, unlike include() which only emits a warning.

PHP - PHP Programming Language Practice Test