修改上传图片的扩展名少了.符号

helper/file_upload.php

@@ -67,7 +67,7 @@ class FileUpload
         }
 
         $ext_name = strtolower(pathinfo($file_name)['extension']);
-        $dest_fn = strval($member_id) . self::get_random_string(10) . $ext_name;
+        $dest_fn = strval($member_id) . self::get_random_string(10) . '.' . $ext_name;
         $dest_file = $dest_dir . "/" . sprintf("%03d", intval(intval($member_id) / 2000)) . "/" . $dest_fn;
 
         if (!self::recursive_makedir(dirname($dest_file))) {