Plural, Singular forms

  // From PHPixie ORM [http://phpixie.com]

	/**
	 * Gets plural form of a noun
	 *
	 * @param string  $str Noun to get a plural form of
	 * @return string  Plural form
	 */
	protected function plural($str)
	{
		$regexes = array(
			'/^(.*?[sxz])$/i' => '\\1es',
			'/^(.*?[^aeioudgkprt]h)$/i' => '\\1es',
			'/^(.*?[^aeiou])y$/i' => '\\1ies',
		);
		foreach ($regexes as $key => $val)
		{
			$str = preg_replace($key, $val, $str, -1, $count);
			if ($count)
			{
				return $str;
			}
		}
		return $str.'s';
	}

	/**
	 * Gets singular form of a noun
	 *
	 * @param string $str Noun to get singular form of
	 * @return string Singular form of the noun
	 */
	protected function singular($str)
	{
		$regexes = array(
			'/^(.*?us)$/i' => '\\1',
			'/^(.*?[sxz])es$/i' => '\\1',
			'/^(.*?[^aeioudgkprt]h)es$/i' => '\\1',
			'/^(.*?[^aeiou])ies$/i' => '\\1y',
			'/^(.*?)s$/' => '\\1',
		);
		foreach ($regexes as $key => $val)
		{
			$str = preg_replace($key, $val, $str, -1, $count);
			if ($count)
			{
				return $str;
			}
		}
		return $str;
	}