PHP:

 
<?php
namespace myTools\EventHandlers\Bitrix\IBlock;

use myTools\Tools\Events\BaseEvent;

class OnBeforeIBlockElementUpdate extends BaseEvent
{
    /**
     * @eventSort 100
     */
    public static function myEventHandler(&$arFields)
    {
        //код первого обработчика
        if($arFields["IBLOCK_ID"]==1 && is_Array($arFields["PROPERTY_VALUES"])){
            \myTools\Catalog::ChangeSection1C($arFields, 1, 60, 5);
        }
        ...
    }

    /**
     * @eventSort 200
     */
    static function ChangeAddPicName(&$arFields)
    {
        $arFields = \myTools\Catalog::ChangeAddPicName($arFields);
        ...
    }

    static function osAddIdToQueue(&$arFields){

        $sLog = date("Y-m-d H:i:s") . PHP_EOL;
        $sLog .= 'IBLOCK_ID:' . $arFields["IBLOCK_ID"] . PHP_EOL;
        $sLog .= 'PRODUCT_ID:' . $arFields["ID"] . PHP_EOL;
        file_put_contents($_SERVER['DOCUMENT_ROOT']."/local/log/so_OnBeforeIBlockElementUpdate.txt", $sLog, FILE_APPEND);

        if($arFields["IBLOCK_ID"]==1){
            //$e = new \myTools\Opensearch\QueueIndex();
            //$e->addIds([$arFields["ID"]]);
            $result = \myTools\Opensearch\QueueTable::add(['IBID'=>1, 'PRODUCT_ID'=>$arFields["ID"]]);
        } elseif($arFields["IBLOCK_ID"]==178){
            //$e = new \myTools\Opensearch\QueueIndex();
            //$e->addIds([$arFields["ID"]]);
            $result = \myTools\Opensearch\QueueTable::add(['IBID'=>178, 'PRODUCT_ID'=>$arFields["ID"]]);
        }
    }
}