Smarty ordinal modifier plugin

modifier.ordinal.php

<?php

/**
 * Gets the ordinal for a number
 *
 * @param integer $number
 * @return string
 */
function smarty_modifier_ordinal($number)
{
    $number = intval($number);

    if (!in_array(($number % 100), array(11, 12, 13))) {
      switch ($number % 10) {
        case 1: return $number . 'st';
        case 2: return $number . 'nd';
        case 3: return $number . 'rd';
      }
    }

    return $number . 'th';
}

This one doesn't show 12nd like the original did.