<? require_once ($_SERVER['DOCUMENT_ROOT']."/bitrix/modules/main/include.php");?>
  <?
  if (CModule::IncludeModule("sale") && CModule::IncludeModule("catalog"))
  {
    if (isset($_POST['PRODUCT_ID'])) {
      $PRODUCT_ID = intval($_POST['PRODUCT_ID']);
      $QUANTITY = 1;
      Add2BasketByProductID(
        $PRODUCT_ID,
        $QUANTITY,
        false
      );
  	
  	echo " Вывод данных: ".$_POST['PRODUCT_ID'];
    }
    else {
      echo "Нет параметров ";
    }
  }
  else {
    echo "Не подключены модули";
  }  	
  ?>