additionaldatetype.php

См. документацию.

<?
 
namespace Bitrix\Main\UI\Filter;
 

class AdditionalDateType
{
    const CUSTOM_DATE = "CUSTOM_DATE";
    const PREV_DAY = "PREV_DAY";
    const NEXT_DAY = "NEXT_DAY";
    const MORE_THAN_DAYS_AGO = "MORE_THAN_DAYS_AGO";
    const AFTER_DAYS = "AFTER_DAYS";
 

    public static function getList()
    {
        $reflection = new \ReflectionClass(__CLASS__);
        return $reflection->getConstants();
    }
}