Stuff

<?php
	function add_nd($number) {
		$number .= '';
		$last_digit = substr($number,-1);
		if (!is_numeric($last_digit)) {
			return $number;
		}		
		if ($last_digit == 1) {
			$number .= 'st';
		} elseif ($last_digit == 2) {
			$number .= 'nd';
		} elseif ($last_digit == 3) {
			$number .= 'rd';
		} else {
			$number .= 'th';
		}
		return $number;
	}
?>