Проверить в каком каталоге мы находимся в Битрекс

В Битриксе часто нужна проверка на какой странице показывать ту или иную информацию, например нам разместить слайдер только для страниц торгового каталога, этого нужно сделать простую проверку:

if(CSite::InDir("/catalog/")){
	"bitrix:news.list", 
	"main-slider", 
	array(
		"ACTIVE_DATE_FORMAT" => "d.m.Y",
		"ADD_SECTIONS_CHAIN" => "N",
		"AJAX_MODE" => "Y",
		"AJAX_OPTION_ADDITIONAL" => "",
		"AJAX_OPTION_HISTORY" => "N",
		"AJAX_OPTION_JUMP" => "N",
		"AJAX_OPTION_STYLE" => "Y",
		"CACHE_FILTER" => "Y",
		"CACHE_GROUPS" => "Y",
		"CACHE_TIME" => "36000000",
		"CACHE_TYPE" => "A",
		"CHECK_DATES" => "N",
		"DETAIL_URL" => "",
		"DISPLAY_BOTTOM_PAGER" => "N",
		"DISPLAY_TOP_PAGER" => "N",
		"FIELD_CODE" => array(
			0 => "PREVIEW_PICTURE",
			1 => "",
		),
		"FILTER_NAME" => "arrFilterHeaderSlider",
		"HIDE_LINK_WHEN_NO_DETAIL" => "N",
		"IBLOCK_ID" => "2",
		"IBLOCK_TYPE" => "slider",
		"INCLUDE_IBLOCK_INTO_CHAIN" => "N",
		"INCLUDE_SUBSECTIONS" => "Y",
		"MESSAGE_404" => "",
		"NEWS_COUNT" => "20",
		"PAGER_BASE_LINK_ENABLE" => "N",
		"PAGER_DESC_NUMBERING" => "N",
		"PAGER_DESC_NUMBERING_CACHE_TIME" => "36000",
		"PAGER_SHOW_ALL" => "N",
		"PAGER_SHOW_ALWAYS" => "N",
		"PAGER_TEMPLATE" => ".default",
		"PAGER_TITLE" => "Слайдер",
		"PARENT_SECTION" => "",
		"PARENT_SECTION_CODE" => "",
		"PREVIEW_TRUNCATE_LEN" => "",
		"PROPERTY_CODE" => array(
			0 => "URL",
			1 => "",
		),
		"SET_BROWSER_TITLE" => "N",
		"SET_LAST_MODIFIED" => "N",
		"SET_META_DESCRIPTION" => "N",
		"SET_META_KEYWORDS" => "N",
		"SET_STATUS_404" => "N",
		"SET_TITLE" => "N",
		"SHOW_404" => "N",
		"SORT_BY1" => "SORT",
		"SORT_BY2" => "NAME",
		"SORT_ORDER1" => "ASC",
		"SORT_ORDER2" => "ASC",
		"COMPONENT_TEMPLATE" => "main-slider",
		"STRICT_SECTION_CHECK" => "N",
		"COMPOSITE_FRAME_MODE" => "A",
		"COMPOSITE_FRAME_TYPE" => "AUTO"
	),
	false
);
}
}

Не стоит путать эту функцию с $APPLICATION->GetCurPage(), т.к. GetCurPage() проверяет на конкретную страницу, а CSite::InDir проверяет ещё и вложенные подкаталоги.