<?php
$greet = function($name) {
return 'Hello, $name!';
};
echo $greet('John');
?
What will be the output of the following PHP code?<?php
function add($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 + $b
Which PHP feature allows specifying default values for function arguments?
A). Default arguments
B). Optional parameters
C). Variable-length argument lists
D). All of the above
What will be the output of the following PHP code?<?php
function greet($name = 'Guest') {
return 'Hello, $name!';
}
echo greet('Alice');
?
A). Hello, Guest!
B). Hello, Alice!
C). Hello, $name!
D). Function call will result in an error
What is the significance of passing functions as arguments in PHP?
A). It allows functions to be called multiple times
B). It simplifies the function definition process
C). It enables dynamic function invocation and behavior
D). It prevents code duplication
Which PHP keyword is used to define functions without specifying their names?
A). Dynamic functions
B). Anonymous functions
C). Inner functions
D). Nested functions
What will be the output of the following PHP code?<?php
function sum($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 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 function is used to return a value from a function and terminate its execution?
A). return
B). exit
C). break
D). continue
Which keyword is used to define default parameter values in PHP functions?
A). default
B). var
C). const
D). None of the above