CIBlockPropertyTools::getExistProperty

static function getExistProperty(int $iblockId, $propertyCodes, bool $indexCode = true)
{
	if ($iblockId <= 0)
	{
		return false;
	}
	$propertyCodes = static::clearPropertyList($propertyCodes);
	if (empty($propertyCodes))
	{
		return false;
	}

	$result = [];
	$propertyIterator = IblockPropertyTable::getList([
		'select' => [
			'ID',
			'CODE'
		],
		'filter' => [
			'=IBLOCK_ID' => $iblockId,
			'@CODE' => $propertyCodes
		]
	]);
	if ($indexCode)
	{
		while ($property = $propertyIterator->fetch())
		{
			$property['ID'] = (int)$property['ID'];
			if (!isset($result[$property['CODE']]))
			{
				$result[$property['CODE']] = $property['ID'];
			}
			else
			{
				if (!is_array($result[$property['CODE']]))
				{
					$result[$property['CODE']] = [
						$result[$property['CODE']]
					];
				}
				$result[$property['CODE']][] = $property['ID'];
			}
		}
		unset($property, $propertyIterator);
	}
	else
	{
		while ($property = $propertyIterator->fetch())
		{
			$property['ID'] = (int)$property['ID'];
			$result[$property['ID']] = $property['CODE'];
		}
		unset($property, $propertyIterator);
	}
	return $result;
}