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<?php namespace Chekote\NounStore;
use InvalidArgumentException;
class Key
{
use Singleton;
const ORDINAL_ST = 'st';
const ORDINAL_ND = 'nd';
const ORDINAL_RD = 'rd';
const ORDINAL_TH = 'th';
protected static $ordinals = [
0 => self::ORDINAL_TH,
1 => self::ORDINAL_ST,
2 => self::ORDINAL_ND,
3 => self::ORDINAL_RD,
4 => self::ORDINAL_TH,
5 => self::ORDINAL_TH,
6 => self::ORDINAL_TH,
7 => self::ORDINAL_TH,
8 => self::ORDINAL_TH,
9 => self::ORDINAL_TH,
];
/**
* Provides the ordinal notation for the specified nth number.
*
* @param int $nth the number to determine the ordinal for
* @return string the ordinal
*/
public function getOrdinal($nth)
if ($nth < 0) {
throw new InvalidArgumentException('$nth must be a positive number');
}
return $nth > 9 && $nth < 20 ? self::ORDINAL_TH : self::$ordinals[substr($nth, -1)];
Chekote /
noun-store
