Which PHP keyword is used to define functions without specifying their names?
A). Dynamic functions
B). Anonymous functions
C). Inner functions
D). Nested functions
Which keyword is used to define default parameter values in PHP functions?
A). default
B). var
C). const
D). None 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, $name!'; }
D). John
Which PHP feature allows defining functions within other functions?
A). Inner functions
B). Enclosed functions
C). Nested functions
D). All of the above
What will be the output of the following PHP code?<?php
function sum($a, $b = 5) {
return $a + $b;
}
echo sum(3);
?
A). 3
B). 8
C). 5
D). Function call will result in an error
Which PHP feature allows defining functions with variable-length argument lists?
A). Dynamic functions
B). Variable arguments
C). Varargs
D). All of the above
What will be the output of the following PHP code?<?php
function greet() {
echo 'Hello, World!';
}
if (function_exists('greet')) {
greet();
} else {
echo 'Function does not exist';
}
?
A). Hello, World!
B). Function does not exist
C). Undefined function: greet
D). Function greet() { echo 'Hello, World!'; }
What will be the output of the following PHP code?<?php
function add($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 + $b
What will be the output of the following PHP code?<?php
function factorial($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; }
What is the significance of passing functions as arguments in PHP?
A). It allows functions to be called multiple times
B). It simplifies the function definition process
C). It enables dynamic function invocation and behavior
D). It prevents code duplication