ArticlesCatsModel includes/model

<?php

class ArticlesCatsModel
{

        public function Get($extra='')
        {
                $cats = array();
                System::Get('db')->Execute("SELETE * FROM `articles_cats` {$extra}");
                if(System::Get('db')->AffectedRows()>0)
                {
                        $cats = System::Get('db')->GetRows();
                }
                return $cats;

        }

        // return one article

        public function Get_By_Id($cid)
        {


        $cid = (int)$id;
                $cat = $this->Get("WHERE `cid`=$cid") ;
                return $cat[0];


        }



        public function Add($data)
        {

                if(System::Get('db')->Insert('aticles_cats',$data)){
                        return TRUE;
                }
                return FALSE;

        }


        public function Update($cid,$data)

        {
                $cid=(int)$cid;
                if(System::Get('db')->Update('aticles_cats',$data,"WHERE `id` = $id")){
                        return TRUE;
                }
                return FALSE;

        }

        public function Delete($cid)

        {

                $cid =(int)$cid;
                if(System::Get('db')->Delete('aticles_cats',"WHERE `cid` = $cid")){
                        return TRUE;
                }
                return FALSE;

        }



}

?>