PHP Functions Easy Questions and Answers

What will be the output of the following PHP code?

<?php
function calc1(&$n)
{
    $n += 7;
}
function calc2(&$n)
{
    $n += 8;
}
$OrignalNumber = 12;
calc1( $OrignalNumber );
echo "Original Number is $OrignalNumber\n";
calc2( $OrignalNumber );
echo "Original Number is $OrignalNumber\n";
?>

Correct Option: C

calc2() passes value of the variable by reference.

What will be the output of the following PHP code?

<?php
function addation($n1, $n2)
{
    $add = $n1 + $n2;
    return $add;
}
$return_val = addation(50, 70);
echo "Returned value : $return_val"
?>

Correct Option: A

Functions returns value 120.

What will be the output of the following PHP code?

<?php
function HelloFuncation()
{
   echo "Hello Interview Mania\n";
}
$fun_holder = "HelloFuncation";
$fun_holder();
?>

Correct Option: C

It is possible to assign function names as strings to variables and then treat these variables exactly as you would the function name itself.

What will be the output of the following PHP code?

<?php
function First()
{
    echo "Function First executed...\n";
    function Second()
    {
        echo "Function Second executed...";
    }
}
First();
Second();
?>

Correct Option: D

Second is declared in First and is called after First.Hence it works.

What will be the output of the following PHP code?

<?php
function fun($Str)
{
    echo strpos($Str, "good",0);
}
fun("The Interview Mania is good for study.");
?>

Correct Option: C

good starts from position 23 in string.