What is the purpose of passing arguments to a function in PHP?

Which PHP feature allows specifying default values for function arguments?

A). Default arguments

B). Optional parameters

C). Variable-length argument lists

D). All of the above

What is the output of the following PHP code?
<?php
function multiply(...$args) {
$result = 1;
foreach ($args as $value) {
$result *= $value;
}
return $result;
}
echo multiply(2, 3, 4);
?

A). 24

B). 9

C). 6

D). 2

What will be the output of the following PHP code?
<?php
$greet = function($name) {
return 'Hello, $name!';
};
echo $greet('John');
?

A). Hello, John!

B). Hello, $name!

C). function($name) { return 'Hello, $name!'; }

D). John

What will be the output of the following PHP code?
<?php
function add($a, $b) {
return $a + $b;
}
$result = add(5, 3);
echo $result;
?

A). 8

B). add(5, 3)

C). function add($a, $b) { return $a + $b; }

D). $a + $b

Which of the following statements about returning values from PHP functions is true?

A). PHP functions can return multiple values simultaneously

B). PHP functions cannot return values

C). PHP functions must always return a value

D). PHP functions can only return values of type string

Which PHP function is used to return a value from a function and terminate its execution?

A). return

B). exit

C). break

D). continue

What will be the output of the following PHP code?
<?php
function greet() {
echo 'Hello, World!';
}
if (function_exists('greet')) {
greet();
} else {
echo 'Function does not exist';
}
?

A). Hello, World!

B). Function does not exist

C). Undefined function: greet

D). Function greet() { echo 'Hello, World!'; }

What is the output of the following PHP code?
<?php
function outer() {
function inner() {
echo 'Inner function';
}
}
inner();
?

A). Inner function

B). Function does not exist: inner

C). Undefined function: inner

D). Function inner() { echo 'Inner function'; }

Which PHP feature allows defining functions within other functions?

A). Inner functions

B). Enclosed functions

C). Nested functions

D). All of the above

What is the purpose of the return statement in PHP functions?

A). To output a value from the function and terminate its execution

B). To specify the return type of the function

C). To declare a variable within the function

D). To terminate the function execution