<!DOCTYPE html>
<html>
<body>
<?php
$num = 23456;
$arr = [];
$answer = [];
$value = 1;
$j = 0;
$count = -1;
while($num > $value)
{
$count++;
$value = pow(8, $count);
$arr[$count] = $value;
}
$count = $count - 1;
for($i=$count; $i>=0; $i--)
{
$answer[$j] = floor($num / $arr[$i]);
$j++;
$num = $num % $arr[$i];
}
echo "Octal number of 23456 (decimal) is ";
for($i=0; $i<=$count; $i++)
echo $answer[$i];
?>
</body>
</html>