PHP Variables Easy Questions and Answers

What will be the output of the following PHP code ?

<?php
$p = 6;
$q = 5;
function Res($p = 5, $q = 6)
{
    $r = $p+$q/$q+$p;
    echo "$r";
} 
echo $p;
echo $q;
echo $r; 
Res($p, $q);
?>

Correct Option: E

Firstly, the statements outside the function are printed, since r is not defined it’ll no value is printed for r. Next the function is called and the value of r inside the function is printed.

What will be the output of the following PHP code ?

<?php
$n = 25;
function Res()
{
    $n = 15;
    echo "$n";
}
Res();
echo "$n";
?>

Correct Option: C

First when the function is called variable n is initialised to 15 so 15 is printed later the global value 25 is printed.

What will be the output of the following PHP code ?

<?php
$p = 51;
function Result()
{
    echo "$p";
}
Result();
?>

Correct Option: C

The variable p is not defined inside the function Result(), therefore nothing is printed on the screen.

What will be the output of the following PHP code ?

<?php
$n = 25;
{
    echo "$n";
}
?>

Correct Option: B

The variable n stores the value 25 and therefore the value 25 is printed on the screen.

What will be the output of the following PHP code ?

<?php
$n = 10;
{
    $n = 20;
    echo "$n";
}
echo "$n";
?>

Correct Option: D

Variable n stores the value 20 and not 10.