Why is ResizeImageGet not working in template.php?

Question

1C-Bitrix

Hello.
I fight everything. I don't understand at all. The code works everywhere, except for one template.

<?foreach ($arResult["ITEMS"] as $arItem) {?>
 <? 
 $arPicture = CFile::GetFileArray($arItem["PREVIEW_PICTURE"]);
$renderImage = CFile::ResizeImageGet($arItem["PREVIEW_PICTURE"] , Array("width" => 300, "height" => 300), BX_RESIZE_IMAGE_EXACT, false);
?>
<img src="<?=$arItem["PREVIEW_PICTURE"]["SRC"]?>" alt="<?=$arSection["PREVIEW_PICTURE"]["ALT"]?>">
 <?}?>

<img src="<?=$arItem["PREVIEW_PICTURE"]["SRC"]?>" alt="<?=$arSection["PREVIEW_PICTURE"]["ALT"]?>">

Here it works
I do
var_dump ($arPicture);
writes null.
I do it to make it work

$renderImage = CFile::ResizeImageGet($arItem["PREVIEW_PICTURE"] , Array("width" => 200, "height" => 200), BX_RESIZE_IMAGE_EXACT, false);

Answer 1

1) You need to learn how to read the description of functions - take.ms/GjcSb
2) Pass ID

$renderImage = CFile::ResizeImageGet($arItem["PREVIEW_PICTURE"]['ID'] , Array("width" => 200, "height" => 200), BX_RESIZE_IMAGE_EXACT, false);

Answer 2

You write the result to $renderImage and output it from another variable. It would be correct like this:
<img src="<?=$renderImage["src"]?>" alt="">

Answer 3

$renderImage = CFile::ResizeImageGet($arItem["PREVIEW_PICTURE"]["ID"] , Array("width" => 300, "height" => 300), BX_RESIZE_IMAGE_EXACT, false);

$arItem["PREVIEW_PICTURE"]["ID"] must be passed