<?php
$greet = function($name) {
return 'Hello, $name!';
};
echo $greet('John');
?
What is the output of the following PHP code?<?php
function uppercase($str) {
return strtoupper($str);
}
echo uppercase('hello');
?
A). HELLO
B). hello
C). Uppercase
D). Undefined function: uppercase
Which keyword is used to define default parameter values in PHP functions?
A). default
B). var
C). const
D). None of the above
Which PHP function is used to check if a function exists before calling it?
A). function_exists()
B). is_function()
C). function_defined()
D). None of the above
What will be the output of the following PHP code?<?php
function factorial($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 $result; }
Which PHP function is used to return a value from a function and terminate its execution?
A). return
B). exit
C). break
D). continue
Which PHP keyword is used to pass a function as an argument to another function?
A). Dynamic functions
B). Anonymous functions
C). Callbacks
D). All of the above
Which PHP feature allows defining functions with a variable number of arguments?
A). Optional parameters
B). Dynamic functions
C). Variable arguments
D). All of the above
What is the significance of passing functions as arguments in PHP?
A). It allows functions to be called multiple times
B). It simplifies the function definition process
C). It enables dynamic function invocation and behavior
D). It prevents code duplication
What is the output of the following PHP code?<?php
function outer() {
function inner() {
echo 'Inner function';
}
}
inner();
?
A). Inner function
B). Function does not exist: inner
C). Undefined function: inner
D). Function inner() { echo 'Inner function'; }
What is the output of the following PHP code?<?php
function multiply(...$args) {
$result = 1;
foreach ($args as $value) {
$result *= $value;
}
return $result;
}
echo multiply(2, 3, 4);
?
A). 24
B). 9
C). 6
D). 2