CacheProvider::deleteAllCache

static function deleteAllCache()
{
	$users = UserTable::getList(array(
		"select" => array("ID"),
		"filter" => array(
			"=ACTIVE" => "Y",
			"=CONFIRM_CODE" => false,
			"!UF_DEPARTMENT" => false,
			"=IS_REAL_USER" => "Y"
		)
	));

	while ($user = $users->fetch())
	{
		self::deleteUserCache($user["ID"], false, false);
	}

	$response = BitrixMainContext::getCurrent()->getResponse();
	$response->addHeader("X-Bitrix-Composite-Delete", "All");
}