How to add zeros to the left of a number [duplicate]

Question

I have a piece of code for converting a Decimal number into base 3

$number = 10; // For Example
$from_base = 10;
$to_base = 3;
$base_three = base_convert ( $number , $from_base ,  $to_base );
echo $base_three;

So the number that it echos is 101 and it has 3 digits. but I what it to echos is 000101 so that it has 6 digits. Converting Decimal into base 3 with always 6 digits even though it has only 3 or 4 useful digits, is my goal! how can I solve it ?

Answer 1

try this

echo str_pad($base_three, 6, "0", STR_PAD_LEFT);