edit

src/Lib/Input.php

@@ -190,7 +190,7 @@ class Input
         return '<textarea style="height:100px;" update_type="value" class="update_value form-control ' . (isset($param['valid']) ? $param['valid'] : '') . '" name="' . $param['name'] . '" value="' . (isset($param['value']) ? $param['value'] : (isset($param['default']) ? $param['default'] : '')) . '">' . (isset($param['value']) ? $param['value'] : (isset($param['default']) ? $param['default'] : '')) . '</textarea>';
     }
 
-    private function uploadHandle($param)
+    private static function uploadHandle($param)
     {
         $html = $style = '';
         $div = array('', '');