PHP Variables Easy Questions and Answers

What will be the output of the following PHP code ?

<?php
$m = 15;
$n = 5;
$t = 7;
echo ($m % ($n) + $t);
?>

The innermost bracket is evaluated first, since it covers only variable n it is as good as not using brackets.

What will be the output of the following PHP code ?

<?php
$p = 22;
$q = 5;
$r = 4;
echo $p % $q % $r;
?>

The expression is considered as ($p%$q)%r in this case (22%5)%4 which is 2.

What will be the output of the following PHP code ?

<?php
$p = 11;
$q = 3;
echo $p % $q;
?>

% is the modulo operator. Unlike in C we can use it get reminder or floating point numbers in PHP.

What will be the output of the following PHP code ?

<?php
$a = 41;
$b = 13;
$c = 10;
$d = $c + $a + $b;
echo "$d";
?>

Normal addition of variables a, b and c occurs and result of 64 will be displayed.

What will be the output of the following PHP code ?

<?php
$n1 = 14;
$n2 = 31;
$n3 = 11;
echo "$n1 = $n1 + $n2 + $n3";
?>

Again since the variables are inside double quotes we get this result.