<!DOCTYPE html>
<html>
<body>
<?php
$num = 1000001;
$arr = [];
$i = -1;
$total = 0;
while($num != 0)
{
$i++;
$arr[$i] = $num % 10;
$num = $num / 10;
$num = floor($num);
}
for($j=$i; $j>=0; $j--)
$total += ($arr[$j] * pow(2, $j));
echo "Decimal number of $num (binary) is $total";
?>
</body>
</html>