I'd like to convert base 10 numbers to base 31
I would like to use only these characters: 23456789abcdefghjkmnpqrstuvwxyz
As you can see, 5 characters are excluded (i don't need these): 1 0 o l i
The function I have now is below but of course it doesn't work. When 2 is input it outputs 4. The output for tenTo31(2)
should be 2
function tenTo31($num)
{
$out = "";
$alpha = "23456789abcdefghjkmnpqrstuvwxyz";
while($num > 30)
{
$r = $num % 31;
$num = floor($num / 31) - 1;
$out = $alpha[$r] . $out;
}
return $alpha[$num] . $out;
}
Any ideas on how to make this work?
This is a blind guess at what you want: