edit

src/Lib/Input.php

@@ -248,7 +248,7 @@ class Input
         return array($html, $type, $div, $style, $yun);
     }
 
-    private function uploadParam($param)
+    private static function uploadParam($param)
     {
         if (isset($param['upload_key'])) {
             $param['key'] = $param['upload_key'];