gx

@@ -96,7 +96,7 @@ class BlogController extends BaseController
             if(!empty($category_id)){
                 $categoryModel = new BlogCategory();
                 $category_name_arr = $categoryModel->formatQuery(['id'=>['in',$category_id]])->pluck('name')->toArray();
-                $str = explode(',',$category_name_arr);
+                $str = implode(',',$category_name_arr);
             }
         }
         return $str;