Fixed XF\Util\Php::validateCallback does not handle multiple \\ in namespace paths

[Xon]

Affected version

2.1.8

If you paste XF\\Option\\UserGroup::renderSelect into an XF:Option's "Format parameters" for a 'php callback' option, instead of a nice error it instead gives;

Fatal error: Cannot declare class XF\Option\UserGroup, because the name is already in use in /var/www/html/src/XF/Option/UserGroup.php on line 0

Having multiple \ in the classname path should probably be treated as an error so the class loader system doesn't render random parts of the forum inaccessible. I assume this affects things like class extensions, code event listeners, etc.

 

[XF Bug Bot]

Thank you for reporting this issue, it has now been resolved. We are aiming to include any changes that have been made in a future XF release (2.1.10).

Change log:

Don't allow double backslashes for PHP callbacks.

There may be a delay before changes are rolled out to the XenForo Community.