For bitrix ajax cart. Perform add and buy actions

add2cart.php

<?
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");

CModule::IncludeModule("sale");

if (($_GET["action"] == "ADD2BASKET" || $_GET["action"] == "BUY") && IntVal($_GET["id"])>0) {
	$arFields = array(
		"FUSER_ID"=>CSaleBasket::GetBasketUserID(),
		"CURRENCY" => "RUB",
		"PRODUCT_ID" => $_GET["id"],
		"QUANTITY" => $_GET["count"],
		"MODULE" => "catalog",
		"NAME" => $_GET["name"],
		"PRICE" => $_GET["price"],
		"LID" => SITE_ID
		);

	$el = new CSaleBasket;
	$res = $el->Add($arFields);
	
	if($res) {
    	global $APPLICATION;
    	$APPLICATION->IncludeComponent(
            "bitrix:sale.basket.basket.line", 
            "header_basket", 
            array(
                "PATH_TO_BASKET" => SITE_DIR."personal/cart/",
                "PATH_TO_PERSONAL" => SITE_DIR."personal/",
                "SHOW_PERSONAL_LINK" => "N",
                "SHOW_NUM_PRODUCTS" => "Y",
                "SHOW_TOTAL_PRICE" => "Y",
                "SHOW_PRODUCTS" => "N",
                "POSITION_FIXED" => "N",
                "SHOW_EMPTY_VALUES" => "Y",
                "SHOW_AUTHOR" => "N",
                "PATH_TO_REGISTER" => SITE_DIR."login/",
                "PATH_TO_PROFILE" => SITE_DIR."personal/",
                "POSITION_HORIZONTAL" => "right",
                "POSITION_VERTICAL" => "top"
            ),
            false
        );
    }
    if ($_GET["action"] == "BUY") {
        LocalRedirect("/personal/cart/");
    }
}

require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/epilog_after.php");
?>