:
  :
//この商品を買った人はこんな商品も買っています
$objPage->arrRelateProducts = lfGetRelateProducts($tmp_id);

$objPage->arrProduct["parent_category_id"] = lfGetParentCategoryID($objPage->arrProduct["category_id"]);
$objPage->arrProduct["root_category_id"] = lfGetRootCategoryID($objPage->arrProduct["category_id"]);

// 拡大画像のウィンドウサイズをセット
list($large_width, $large_height) = getimagesize(IMAGE_SAVE_DIR . basename($objPage->arrFile["main_large_image"]["filepath"]));
$objPage->tpl_large_width = $large_width + 60;
$objPage->tpl_large_height = $large_height + 80;

$objView->assignobj($objPage);
$objView->display(SITE_FRAME);
//-----------------------------------------------------------------------------------------------------------------------------------

/* 親カテゴリの取得 */
function lfGetParentCategoryID($category_id) {
	$objQuery = new SC_Query();
	$parent_category_id = $objQuery->get("dtb_category", "parent_category_id", "category_id = ?", array($category_id));
	if($parent_category_id < 1) {
		return $category_id;
	}
	return $parent_category_id;
}

/* ルートカテゴリの取得 */
function lfGetRootCategoryID($category_id) {
	$objQuery = new SC_Query();
	do{
		$parent_category_id = $objQuery->get("dtb_category", "parent_category_id", "category_id = ?", array($category_id));
		if($parent_category_id > 0) {
			$category_id = $parent_category_id;
		}
	}while($parent_category_id > 1);
	return $category_id;
}

/* ファイル情報の初期化 */
function lfInitFile() {
  :
  :

現在のカテゴリIDは<!--{$arrProduct.category_id}--><br />
1つ前のカテゴリIDは<!--{$arrProduct.parent_category_id}--><br />
最上位カテゴリIDは<!--{$arrProduct.root_category_id}--><br />