PHP Functions Easy Questions and Answers

What will be the output of the following PHP code?

<?php
function n()  
    {
        function m()
        {
            echo 'M';
        }
        echo 'N';
    }
m();
n();
?>

Correct Option: B

This will be the output- Fatal error: Call to undefined function m(). You cannot call a function which is inside a function without calling the outside function.

What will be the output of the following PHP code?

<?php
function calculate($p, $t="")
    {
        $total = $p + ($p * $t);
        echo "$total"; 
    }
calculate(65);    
?>

Correct Option: D

You can designate certain arguments as optional by placing them at the end of the list and assigning them a default value of nothing.

What will be the output of the following PHP code?

<?php
function n()
    {
        function m()
        {
            echo 'M';
        }
        echo 'N';
    }
n();
n();
?>

Correct Option: D

This will be the output- I am a Fatal error: Cannot redeclare b()

What will be the output of the following PHP code?

<?php
define("GREETING1","Welcome to interview mania!");
define("GREETING2","Welcome to interview mania!");
define("GREETING3","Welcome to interview mania!");
echo defined("GREETING");
?>

Correct Option: D

The defined() function checks whether a constant exists.

What will be the output of the following PHP code?

<?php
$option2 = "Hey";
function fun($option1)
    {
        echo $option1;
        echo $option2;
    }
fun("Welcome");
?>

Correct Option: B

If you want to put some variables in function that was not passed by it, you must use “global”. Inside the function type global $option2.