Plugins error (Use roles and capabilities instead) on latest version, multisite

Question

I have the latest, version 3.1.2 and have multisite installed. I have debug on true for testing purposes. I get the follow error when I install plugins.

Where and how do I fix this?

Error: Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /home/mysite/public_html/wp-includes/functions.php on line 3387

thanks in advance!

Answer 1

You are fine , its the plugins who are bad! some plugins have not been updated and are still using User level as capability when adding menu pages instead of capability, for example

 10 = manage_options = admin

take a look at this thread to understand better.

Answer 2

for anyone who meets this issue, you can fix it by changing the parameter of add_options_page like this:

       add_options_page(__('WP Flickr Embed', 'wp-flickr-embed'), __('WP Flickr Embed', 'wp-flickr-embed'), 8, $this->pagesDir.'/admin.php');
       add_options_page(__('WP Flickr Embed', 'wp-flickr-embed'), __('WP Flickr Embed', 'wp-flickr-embed'), 'manage_options', $this->pagesDir.'/admin.php');

Change the number parameter to 'manage_options' if its 8. For other number, you need to do a search.

https://github.com/travisseitler/wp-flickr-embed/commit/d3b03191061e46f4850dce407bb55cf5161c5380

Answer 3

Yes, there are two places to check for this error -- one is when adding a menu / page as in 'add_options_page', and the other is when explicitly checking the capability with current_user_can and its like.

Also, a plugin should not use roles -- it should use capabilities. So for the function I just mentioned 'add_options_page', the capability is probably 'manage_options'.

Roles are for the user to have, which are a grouping of capabilities.