These are lists of things one needs to do in a Default V4 install to be sure all is ok (bug corrections).
Do not comment on this just post the correct code and a small description
(FOR BOTS TO PARSE YOUR SITE (eg:google bot)[list]
[]Open the app/addons/statistics/func.php file.
[]Replace the following line:
[/list]
'client_language' => $_SERVER['HTTP_ACCEPT_LANGUAGE'],
```<br />
with this one:<br />
```php
'client_language' => !empty($_SERVER['HTTP_ACCEPT_LANGUAGE']) ? $_SERVER['HTTP_ACCEPT_LANGUAGE'] : '',