public static function isChildProduct($ProductId, $ChildProductId) { $ischild = false; $obj_retResult = DAL_manageProduct::getProductListByProductId($ChildProductId); //get child node if ($obj_retResult->type == 1) { $arr_ProductList = $obj_retResult->data; $obj_Product = $arr_ProductList[0]; $arrParentIds = explode(",", $obj_Product->Url); foreach ($arrParentIds as $ProductParentId) { if ($ProductParentId == $ProductId) { $ischild = true; } } } return $ischild; }