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

Which PHP feature allows defining functions within other functions?

A). Inner functions

B). Enclosed functions

C). Nested functions

D). All of the above

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 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

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

A). Hello, Guest!

B). Hello, Alice!

C). Hello, $name!

D). Function call will result in an error

Which PHP keyword is used to pass a function as an argument to another function?

A). Dynamic functions

B). Anonymous functions

C). Callbacks

D). All of the above

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!'; }

Which PHP feature allows defining functions with a variable number of arguments?

A). Optional parameters

B). Dynamic functions

C). Variable arguments

D). All of the above

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 feature allows defining functions with variable-length argument lists?

A). Dynamic functions

B). Variable arguments

C). Varargs

D). All of the above

What will be the output of the following PHP code?
<?php
function factorial($n) {
$result = 1;
for ($i = 1; $i <= $n; $i++) {
$result *= $i;
}
return $result;
}
echo factorial(5);
?

A). 120

B). 5

C). Undefined function: factorial

D). Function factorial($n) { $result = 1; for ($i = 1; $i <= $n; $i++) { $result *= $i; } return $result; }