How to fix an error after updating Bitrix?

Question

1C-Bitrix

Good afternoon!
After updating the version of Bitrix to the latest, and the version of php to 7.4, the following error appeared in the news component: prnt.sc/10tgcmx

Found something to swear at.

<?if(count($arItem['DISPLAY_PROPERTIES']['MORE_PHOTO_AN'])> 1):?>
      <div id="owl-demo-list-<?=$i?>" class="owl-carousel owl-theme pole-list-owl-demo" style="display: block">
          <?foreach($arItem['DISPLAY_PROPERTIES']['MORE_PHOTO_AN']['FILE_VALUE'] as $key => $arPHOTO):?>
         <?$file = CFile::ResizeImageGet($arPHOTO, array('width'=>620, 'height'=>'430'), BX_RESIZE_IMAGE_EXACT, true);?>	 
         <div class="tour-item__img">
            	<a href="<?=$arItem['DETAIL_PAGE_URL']?>">
              	<img 
              class="lazyload" 
              data-src="<?$arItem['DISPLAY_PROPERTIES']['MORE_PHOTO_AN'][FILE_VALUE][$key][SRC];?>" 
              alt="<?=$arItem["PROPERTIES"][$langId.'_NAME']["VALUE"]?>"
            />
            </a>
         </div>
        <?endforeach?>
      </div>
  <?elseif(!empty($arItem['PREVIEW_PICTURE']['SRC'])):?>
    <a href="<?=$arItem['DETAIL_PAGE_URL']?>">
      <img class="lazyload" data-src="<?=$arItem['PREVIEW_PICTURE']['SRC']?>" alt="<?=$arItem["PROPERTIES"][$langId.'_NAME']["VALUE"]?>">
    </a>
  <?elseif(empty($arItem['PREVIEW_PICTURE']['SRC'])):?>
    <a href="<?=$arItem['DETAIL_PAGE_URL']?>">
      <div class="no-photo"></div>
    </a>
  <?endif;?>

But I can not understand what is wrong, before the update everything worked as it should. Tell me what's wrong?

Answer 1

What version of PHP did you have before?
Start by replacing the use of all undeclared constants with the lines
https://www.php.net/manual/en/migration72.deprecat...
in particular:
data-src="<?$arItem['DISPLAY_PROPERTIES'][ 'MORE_PHOTO_AN']["FILE_VALUE"][$key]["SRC"];?>"