What is the output of the following PHP code?<?php
function multiply(...$args) {
$result = 1;
foreach ($args as $value) {
$result *= $value;
}
return $result;
}
echo multiply(2, 3, 4);
?>
A). 24
B). 9
C). 6
D). 2
Which of the following statements about return types in PHP functions is true?
A). PHP functions must always have a return type
B). PHP functions can have a return type specified using the 'returns' keyword
C). PHP functions can have a return type specified using the 'return' keyword
D). PHP functions can have a return type declared using type declarations
Which PHP feature allows passing a function as an argument to another function?
A). Dynamic functions
B). Global functions
C). Static functions
D). Callbacks
What is the purpose of parameters in PHP functions?
A). To store values within the function
B). To define the return type of the function
C). To specify values that are passed to the function when it is called
D). To specify the visibility of the function
What keyword is used to define a function in PHP?
A). define
B). function
C). declare
D). method
Which PHP keyword is used to check if a function exists before calling it?
A). check_function()
B). function_exists()
C). function_check()
D). exists_function()
Which PHP keyword is used to declare a variable-length argument list in a function?
A). vararg
B). args
C). params
D). ...$args
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
Which of the following statements about variable scope in PHP functions is true?
A). Variables defined inside a function have global scope
B). Variables defined outside a function have local scope
C). Variables defined inside a function have local scope
D). Variables defined outside a function have global scope
What is the syntax for calling a function in PHP?
A). callFunction()
B). function callFunction()
C). callFunction
D). callFunction;