Take a number input output it with proper suffix like 1st, 2nd, 3rd, and so on

numSuffix.lib.php

<?php
/* Written by Barand from phpfreaks.com */

function numSuffix($n) {
  $str = "$n";
  $t = $n > 9 ? substr($str,-2,1) : 0;
  $u = substr($str,-1);
  if ($t==1) return $str . 'th';
  else switch ($u) {
      case 1: return $str . 'st';
      case 2: return $str . 'nd';
      case 3: return $str . 'rd';
      default: return $str . 'th';
  }
}