CAllIBlockElement::SetElementSection

static function SetElementSection($ID, $arSections, $bNew = false, $bRightsIBlock = 0, $sectionId = null)
{
	global $DB;
	$ID = intval($ID);

	$min_old_id = null;
	$min_new_id = null;

	$arToDelete = array();
	$arToInsert = array();
	if(is_array($arSections))
	{
		foreach($arSections as $section_id)
		{
			$section_id = intval($section_id);
			if($section_id > 0)
			{
				if(!isset($min_new_id) || $section_id < $min_new_id)
					$min_new_id = $section_id;

				$arToInsert[$section_id] = $section_id;
			}
		}
	}
	else
	{
		$section_id = intval($arSections);
		if($section_id > 0)
		{
			$arToInsert[$section_id] = $section_id;
			$min_new_id = $section_id;
		}
	}

	$originalInsert = $arToInsert;
	$additionalInsert = array();

	$arOldParents = array();
	$arNewParents = $arToInsert;
	$bParentsChanged = false;

	//Read database
	if(!$bNew)
	{
		$rs = $DB->Query("
			SELECT * FROM b_iblock_section_element
			WHERE IBLOCK_ELEMENT_ID = ".$ID."
			AND ADDITIONAL_PROPERTY_ID IS NULL
		", false, "File: ".__FILE__."
Line: ".__LINE__);

		while($ar = $rs->Fetch())
		{
			$section_id = intval($ar["IBLOCK_SECTION_ID"]);
			$arOldParents[] = $section_id;

			if(!isset($min_old_id) || $section_id < $min_old_id)
				$min_old_id = $section_id;

			if(isset($arToInsert[$section_id]))
			{
				unset($arToInsert[$section_id]); //This already in DB
			}
			else
			{
				if (isset($originalInsert[$section_id]))
					$additionalInsert[$section_id] = $section_id;
				$arToDelete[] = $section_id;
			}
		}

		if(!empty($arToDelete))
		{
			$bParentsChanged = true;
			$DB->Query($s="
				DELETE FROM b_iblock_section_element
				WHERE IBLOCK_ELEMENT_ID = ".$ID."
				AND ADDITIONAL_PROPERTY_ID IS NULL
				AND IBLOCK_SECTION_ID in (".implode(", ", $arToDelete).")
			", false, "File: ".__FILE__."
Line: ".__LINE__); //And this should be deleted
		}

		if (!empty($additionalInsert))
		{
			foreach ($additionalInsert as $index)
				$arToInsert[$index] = $index;
		}
	}

	if(!empty($arToInsert))
	{
		$bParentsChanged = true;
		$DB->Query("
			INSERT INTO b_iblock_section_element(IBLOCK_SECTION_ID, IBLOCK_ELEMENT_ID)
			SELECT S.ID, E.ID
			FROM b_iblock_section S, b_iblock_element E
			WHERE S.IBLOCK_ID = E.IBLOCK_ID
			AND S.ID IN (".implode(", ", $arToInsert).")
			AND E.ID = ".$ID."
		");
	}

	if($bParentsChanged && $bRightsIBlock)
	{
		$obElementRights = new CIBlockElementRights($bRightsIBlock, $ID);
		if(empty($arOldParents))
			$arOldParents[] = 0;
		if(empty($arNewParents))
			$arNewParents[] = 0;

		$obElementRights->ChangeParents($arOldParents, $arNewParents);
	}

	if($sectionId !== null || ($min_old_id !== $min_new_id))
	{
		CIBlockElement::RecalcSections($ID, $sectionId);
	}

	return !empty($arToDelete) || !empty($arToInsert);
}