<!DOCTYPE html>
<html>
<body>
<?php
$num = 19;
$copyNum = $num;
$digits = 0;
$remainder = 0;
$total = 0;
// find number of digits in num variable
while($copyNum != 0)
{
$digits++;
$copyNum = floor($copyNum / 10);
}
$copyNum = $num;
// slice the numbers from last digits
while($copyNum != 0)
{
$remainder = $copyNum % 10;
$total += pow($remainder, $digits);
$copyNum = floor($copyNum / 10);
}
// result
if($num == $total)
echo "$num is an armstrong number";
else
echo "$num is not an armstrong number";
?>
</body>
</html>