Smarty ordinal modifier plugin

modifier.ordinal.php

<?php

/**
 * Gets the ordinal for a number
 *
 * @param integer $number
 * @param string $format Format to render the number and ordinal
 * @return string
 */
function smarty_modifier_ordinal($number, $format = '%i%s')
{
    $number = intval($number);

    $ordinals = [
        1 => 'st',
        2 => 'nd',
        3 => 'rd'
    ];

    $modulo = $number % 10;

    if (array_key_exists($modulo, $ordinals)) {
        $ordinal = $ordinals[$modulo];
    } else {
        $ordinal = 'th';
    }

    return sprintf($format, $number, $ordinal);
}