How would i add 'No Data' to this php function? - php

Question

I have written a PHP function to add the appropriate stems to each rank. I.E. 1st 2nd 3rd... so on and so forth.
When $num = 0 the displayed result is "0th", is there a way to display this a 'No Data' instead?
function ordinalSuffix($num) {
$suffixes = array("st", "nd", "rd");
$lastDigit = $num % 10;
if(($num < 20 && $num > 9) || $lastDigit == 0 || $lastDigit > 3) return "th";
return $suffixes[$lastDigit - 1];
}

Answer 1

Like this?
function ordinalSuffix($num) {
//Check if $num is equal to 0
if($num == 0){
//return
return 'No Data';
}
$suffixes = array("st", "nd", "rd");
$lastDigit = $num % 10;
if(($num < 20 && $num > 9) || $lastDigit == 0 || $lastDigit > 3) return "th";
return $suffixes[$lastDigit - 1];
}

Answer 2

function ordinalSuffix($num) {
$suffixes = array("st", "nd", "rd");
$lastDigit = $num % 10;
if(($num < 20 && $num > 9) || $lastDigit == 0 || $lastDigit > 3)
{
return "th";
}
elseif($num == "0")
{
return "no data";
}
return $suffixes[$lastDigit - 1];
}

Answer 3

This does not add to your function but I thought it would be fun to post a one-line solution anyways.
function ordinalSuffix($n) {
return ($n==0?'No Data':date('S',mktime(0,0,0,1,($n%10==0?9:($n%100>20?$n%10:$n%100)),2000)));
}