Comparator::flatten

static function flatten($value)
{
	$result = preg_replace('/s*((.*))/i'.BX_UTF_PCRE_MODIFIER, ' ', $value);
	$result = preg_replace('/[~'"`!@#$%^&*+=\.,?:;{}[]-]/i'.BX_UTF_PCRE_MODIFIER, ' ', $result);
	$result = preg_replace('/s{2,}/i'.BX_UTF_PCRE_MODIFIER, ' ', $result);
	$result = ToUpper($result);
	$result = self::getReplacement()->changeYoE($result);
	$result = trim($result);

	return $result;
}