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 specifying default values for function arguments?
A). Default arguments
B). Optional parameters
C). Variable-length argument lists
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, $name!'; }
D). John
What will be the output of the following PHP code?<?php
function add($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 + $b
Which PHP feature allows defining functions with variable-length argument lists?
A). Dynamic functions
B). Variable arguments
C). Varargs
D). All of the above
Which PHP keyword is used to define functions without specifying their names?
A). Dynamic functions
B). Anonymous functions
C). Inner functions
D). Nested functions
Which PHP function is used to check if a function exists before calling it?
A). function_exists()
B). is_function()
C). function_defined()
D). None of the above
What is the purpose of passing arguments to a function in PHP?
A). To specify the return value of the function
B). To allow the function to accept input data
C). To define the function name
D). To terminate the execution of the function
What will be the output of the following PHP code?<?php
function factorial($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