how to insert multiple records in table in laravel

hi there i'm trying to insert data from the cart table to bought table , i should insert multiple records but it only inserts the last value not all , this is my controller function :

public function postIndex(Request $request){
 $quantity=$request->input('quantity');
 $total_price=$request->input('total_price');
 $city=$request->input('city');
 $id=$request['product_id'];

 $cart=DB::table('cart')->where('id','=',$id)->value('product_id');
 $x=DB::table('products')->where('id','=',$cart)->value('quantity');

 $user_id=Auth::user()->id;

 if($x < $quantity) {

 return redirect('cart');
}elseif ($x >= $quantity) {

 $data =array(array('quantity' =>$quantity ,'total_price'=>$total_price        ,'city'=>$city,'product_id'=>$cart,'user_id'=>$user_id));

 DB::table('bought')->insert($data);
 $product=DB::table('products')->where('id','=',$cart)->value('quantity');
 $query= $product - $quantity ;
 DB::table('products')->where('id','=',$cart)->update(['quantity'=>$query]);

  return redirect()->action('followController@getIndex');
        }

ccan anyone help me knowing what is the error ?

via Chebli Mohamed