public function toPdtContent(Request $request, $product_id)
 {
     $product = Product::find($product_id);
     $pdt_content = PdtContent::where('product_id', $product_id)->first();
     $pdt_images = PdtImages::where('product_id', $product_id)->get();
     $count = 0;
     $member = $request->session()->get('member', '');
     if ($member != '') {
         $cart_items = CartItem::where('member_id', $member->id)->get();
         foreach ($cart_items as $cart_item) {
             if ($cart_item->product_id == $product_id) {
                 $count = $cart_item->count;
                 break;
             }
         }
     } else {
         $bk_cart = $request->cookie('bk_cart');
         $bk_cart_arr = $bk_cart != null ? explode(',', $bk_cart) : array();
         foreach ($bk_cart_arr as $value) {
             // 一定要传引用
             $index = strpos($value, ':');
             if (substr($value, 0, $index) == $product_id) {
                 $count = (int) substr($value, $index + 1);
                 break;
             }
         }
     }
     return view('pdt_content')->with('product', $product)->with('pdt_content', $pdt_content)->with('pdt_images', $pdt_images)->with('count', $count);
 }
 public function toProductInfo(Request $request)
 {
     $id = $request->input('id', '');
     $product = Product::find($id);
     $product->category = Category::find($product->category_id);
     $pdt_content = PdtContent::where('product_id', $id)->first();
     $pdt_images = PdtImages::where('product_id', $id)->get();
     return view('admin.product_info')->with('product', $product)->with('pdt_content', $pdt_content)->with('pdt_images', $pdt_images);
 }